LTC5548 Datasheet by Analog Devices Inc.

LTLII‘IM TECHNOLOGY L7 LJUW 1
LTC5548
1
5548f
For more information www.linear.com/LTC5548
Typical applicaTion
FeaTures DescripTion
2GHz to 14GHz
Microwave Mixer with
Wideband DC– 6GHz IF
The LT C
®
5548 is a high performance, microwave double
balanced passive mixer that can be used for frequency
upconversion or downconversion. The device is similar
to the LTC5549, but with a broadband, differential DC to
6GHz IF port. The LTC5548 is recommended for applica-
tions where the IF frequency range extends below 500MHz.
For applications where the IF frequency is always above
500MHz, the LTC5549 is recommended, since it includes
an integrated IF balun.
The LTC5548’s mixer and integrated RF balun are opti-
mized to cover the 2GHz to 14GHz RF frequency range.
The device includes an integrated LO amplifier optimized
for the 1GHz to 12GHz frequency range, requiring only
0dBm drive. The device also includes an integrated LO
frequency doubler, which can be enabled or disabled with
a CMOS-compatible control pin.
The LTC5548 delivers exceptionally high IIP3 and P1dB,
in addition to very low LO to RF and LO to IF leakages.
The part also offers high integration in a small package.
Conversion Loss and IIP3
(Low Side LO, IF = 240MHz)
applicaTions
n Upconversion or Downconversion
n High IIP3: +24.4dBm at 5.8GHz
+21.4dBm at 9GHz
n 7.1dB Conversion Loss at 5.8GHz
n +15.2dBm Input P1dB at 5.8GHz
n Integrated LO Buffer: 0dBm LO Drive
n Selectable Integrated LO Frequency Doubler
n Low LO-RF Leakage: <–30dBm
n 50Ω Wideband Matched RF and LO Ports
n 3.3V/120mA Supply
n Fast Turn ON/OFF for TDD Operation
n 3mm × 2mm, 12-Lead QFN Package
n Microwave Transceivers
n Wireless Backhaul
n Point-to-Point Microwave
n Phased-Array Antennas
n C, X and Ku Band RADAR
n Test Equipment
n Satellite MODEMs
L, LT , LT C , LT M , Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
DUPLEXER
LNA
PA
LTC5548
RX
IFOUT
TX
IFIN
RX
LO
TX
LO
LO
RF IF
LTC5548
LO
RF IF
5548 TA01a
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
14
18
12
5548 TA01b
10
64 6 83 5 7 9 10 11
30
12
16
22
26
20
24
8
28
IIP3
CONVERSION LOSS
DOWNMIXING
UPMIXING
LTC5548 L7LJCUEN2
LTC5548
2
5548f
For more information www.linear.com/LTC5548
pin conFiguraTionabsoluTe MaxiMuM raTings
Supply Voltage (VCC) ..................................................4V
Enable Input Voltage (EN) ................–0.3V to VCC + 0.3V
X2 Input Voltage (X2) ......................–0.3V to VCC + 0.3V
LO Input Power (1GHz to 12GHz) .................. ….+10dBm
LO Input DC Voltage ............................................ ±0.1V
RF Power (2GHz to 14GHz) ................................+20dBm
RF DC Voltage ....................................................... ±0.1V
IF+/IF– Input Power (LF to 6GHz) .......................+20dBm
IF+/IF– Input DC Voltage ......................................... ±0.3V
Operating Temperature Range (TC) ........ –40°C to 105°C
Storage Temperature Range .................. –65°C to 150°C
Junction Temperature (TJ) .................................... 150°C
(Note 1)
VCC
X2
EN
9
8
7
GND
IF+
IF–
1
2
3
13
GND
GND
RF
GND
456
GND
LO
GND
12 11 10
TOP VIEW
UDB PACKAGE
12-LEAD (3mm × 2mm) PLASTIC QFN
TJMAX = 150°C, θJC = 25°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTion
PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply Requirements
Supply Voltage (VCC) l3.0 3.3 3.6 V
Supply Current Enabled X2 = Low (LO Doubler Off)
X2 = High (LO Doubler On)
120
136
140
160
mA
mA
Shutdown Current EN = Low 100 μA
Enable (EN) and LO Frequency Doubler (X2) Logic Inputs
Input High Voltage (On) l1.2 V
Input Low Voltage (Off) l0.3 V
Input Current –0.3V to VCC + 0.3V –30 100 μA
Chip Turn-On Time 0.2 μs
Chip Turn-Off Time 0.1 μs
Dc elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TC = 25°C. VCC = 3.3V, EN = High, unless otherwise noted. Test circuit shown in
Figure 1. (Note 2)
Lead Free Finish
TAPE AND REEL (MINI) TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC5548IUDB#TRMPBF LTC5548IUDB#TRPBF LGXF 12-Lead (3mm × 2mm) Plastic QFN –40°C to 105°C
TRM = 500 pieces.
Consult LT C Marketing for parts specified with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
(http://www.linear.com/product/LTC5548#orderinfo)
LTC5548 L7 LJUW 3
LTC5548
3
5548f
For more information www.linear.com/LTC5548
ac elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TC = 25°C. VCC = 3.3V, EN = High, PLO = 0dBm, PRF = –5dBm (–5dBm/tone for two-
tone IIP3 tests), unless otherwise noted. Test circuit shown in Figure 1. (Notes 2, 3)
PARAMETER CONDITIONS MIN TYP MAX UNITS
LO Frequency Range l1 to 12 GHz
RF Frequency Range l2 to 14 GHz
IF Frequency Range lDC to 6000 MHz
RF Return Loss ZO = 50Ω, 2GHz to 13.6GHz >9 dB
LO Input Return Loss ZO = 50Ω, 1GHz to 12GHz >10 dB
LO Input Power X2 = Low
X2 = High
–6
–6
0
0
6
3
dBm
dBm
Downmixer Application with LO Doubler Off (X2 = Low), IF = 240MHz, Low Side LO
Conversion Loss RF Input = 2GHz
RF Input = 5.8GHz
RF Input = 9GHz
RF Input = 12GHz
6.0
7.1
8.5
10.2
dB
dB
dB
dB
Conversion Loss vs Temperature TC = –40°C to 105°C, RF Input = 5.8GHz l0.006 dB/°C
2-Tone Input 3rd Order Intercept
(ΔfRF = 2MHz)
RF Input = 2GHz
RF Input = 5.8GHz
RF Input = 9GHz
RF Input = 12GHz
23.1
24.4
21.4
18.7
dBm
dBm
dBm
dBm
SSB Noise Figure RF Input = 2GHz
RF Input = 5.8GHz
RF Input = 8.5GHz
6.2
8.0
9.6
dB
dB
dB
LO to RF Leakage fLO = 1GHz to 12GHz <–25 dBm
LO to IF Leakage fLO = 1GHz to 12GHz <–26 dBm
RF to LO Isolation fRF = 2GHz to 14GHz >40 dB
RF Input to IF Output Isolation fRF = 2GHz to 14GHz >35 dB
Input 1dB Compression RF Input = 5.8GHz 15.2 dBm
Downmixer Application with LO Doubler On (X2 = High), IF = 240MHz, Low Side LO
Conversion Loss RF Input = 5.8GHz
RF Input = 9GHz
RF Input = 12GHz
7.3
9.2
11.8
dB
dB
dB
Conversion Loss vs. Temperature TC = –40°C to 105°C, RF Input = 5.8GHz l0.006 dB/°C
2-Tone Input 3rd Order Intercept
(ΔfRF = 2MHz)
RF Input = 5.8GHz
RF Input = 9GHz
RF Input = 12GHz
23.9
20.9
18.3
dBm
dBm
dBm
SSB Noise Figure RF Input = 5.8GHz
RF Input = 8.5GHz
8.9
10.8
dB
dB
LO to RF Input Leakage fLO = 1GHz to 5GHz <–30 dBm
2LO to RF Input Leakage fLO = 1GHz to 5GHz ≤–25 dBm
LO to IF Output Leakage fLO = 1GHz to 5GHz <–36 dBm
2LO to IF Output Leakage fLO = 1GHz to 5GHz <–20 dBm
Input 1dB Compression fRF = 5.8GHz 14.8 dBm
LTC5548 4 L7LJ1W
LTC5548
4
5548f
For more information www.linear.com/LTC5548
ac elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TC = 25°C. VCC = 3.3V, EN = High, PLO = 0dBm, PIF = –5dBm (–5dBm/tone for two-
tone IIP3 tests), unless otherwise noted. Test circuit shown in Figure 1. (Notes 2, 3)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Upmixer Application with LO Doubler Off (X2 = Low), IF = 240MHz, Low Side LO
Conversion Loss RF Output = 2GHz
RF Output = 5.8GHz
RF Output = 9GHz
RF Output = 12GHz
6.3
7.1
9.3
10.9
dB
dB
dB
dB
Conversion Loss vs Temperature TC = –40°C to 105°C, RF Output = 5.8GHz 0.006 dB/°C
Input 3rd Order Intercept (ΔfIF = 2MHz) RF Output = 2GHz
RF Output = 5.8GHz
RF Output = 9GHz
RF Output = 12GHz
26.3
24.9
21.5
17.2
dBm
dBm
dBm
dBm
SSB Noise Figure RF Output = 2GHz
RF Output = 5.8GHz
RF Output = 8.5GHz
7.8
8.7
10.4
dB
dB
dB
LO to RF Output Leakage fLO = 1GHz to 12GHz <–25 dBm
LO to IF Input Leakage fLO = 1GHz to 12GHz <–26 dBm
IF to LO Isolation fIF = 500MHz to 6GHz >50 dB
IF to RF Isolation fIF = 500MHz to 6GHz >40 dB
Input 1dB Compression RF Output = 5.8GHz 15.7 dBm
Upmixer Application with LO Doubler On (X2 = High), IF = 240MHz, Low Side LO
Conversion Loss RF Output = 5.8GHz
RF Output = 9GHz
RF Output = 12GHz
7.4
9.6
12.1
dB
dB
dB
Conversion Loss vs Temperature TC = –40°C to 105°C, RF Output = 5.8GHz 0.006 dB/°C
2-Tone Input 3rd Order Intercept
(ΔfIF = 2MHz)
RF Output = 5.8GHz
RF Output = 9GHz
RF Output = 12GHz
24.9
21.3
16.8
dBm
dBm
dBm
SSB Noise Figure RF Output = 5.8GHz
RF Output = 9GHz
10.4
12.4
dB
dB
LO to RF Output Leakage fLO = 1GHz to 5GHz <–30 dBm
2LO to RF Output Leakage fLO = 1GHz to 5GHz <–25 dBm
LO to IF Input Leakage fLO = 1GHz to 5GHz <–36 dBm
2LO to IF Input Leakage fLO = 1GHz to 5GHz <–20 dBm
Input 1dB Compression RF Output = 5.8GHz 14.8 dBm
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC5548 is guaranteed functional over the –40°C to 105°C
case temperature range (θJC = 25°C/W).
Note 3: SSB noise figure measurements performed with a small-signal
noise source, bandpass filter and 2dB matching pad on input, with
bandpass filters on LO, and output.
LTC5548 L7 HEW 5
LTC5548
5
5548f
For more information www.linear.com/LTC5548
Typical perForMance characTerisTics
Supply Current vs Case
Temperature Supply Current vs VCC
EN = high, test circuit shown in Figure 1.
CASE TEMPERATURE (°C)
–40
ICC (mA)
90
120
5548 G01
70 0 40 80–20 20 60 100
150
80
110
130
100
120
140
X2 = LOW
X2 = HIGH
VCC = 3V
VCC = 3.3V
VCC = 3.6V
SUPPLY VOLTAGE (V)
3.0
ICC (mA)
90
3.6
5548 G02
70 3.2 3.43.1 3.3 3.5
150
80
110
130
100
120
140
X2 = LOW
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
X2 = HIGH
LTC5548 6 L7HCU§QB
LTC5548
6
5548f
For more information www.linear.com/LTC5548
Typical perForMance characTerisTics
Conversion Loss and IIP3 vs
RF Frequency (High Side LO)
Conversion Loss and IIP3 vs
RF Frequency (Low Side LO)
Conversion Loss and IIP3 vs
RF Frequency (High Side LO)
Conversion Loss and IIP3 vs
RF Frequency (Low Side LO)
2GHz to 12GHz downmixer application.
VCC = 3.3V, EN = high, X2 = low, TC = 25°C, PLO = 0dBm, PRF = –5dBm (–5dBm/tone for two-tone IIP3 tests, Δf = 2MHz), IF = 240MHz,
unless otherwise noted. Test circuit shown in Figure 1.
Conversion Loss and IIP3
vs RF Frequency (Low Side LO)
Conversion Loss and IIP3 vs
RF Frequency (High Side LO)
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
8
12
5548 G03
44 63 5 7 98 1110
26
6
12
22
10
14
18
16
20
24
IIP3
CONVERSION LOSS
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
8
12
5548 G04
44 63 5 7 98 1110
26
6
12
22
10
14
18
16
20
24
IIP3
CONVERSION LOSS
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
8
12
5548 G05
44 63 5 7 98 1110
26
6
12
22
10
14
18
16
20
24
IIP3
CONVERSION LOSS
PLO = –6dBm
PLO = 0dBm
PLO = 6dBm
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
8
12
5548 G06
44 63 5 7 98 1110
26
6
12
22
10
14
18
16
20
24
IIP3
CONVERSION LOSS
PLO = –6dBm
PLO = 0dBm
PLO = 6dBm
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
8
12
5548 G07
44 63 5 7 98 1110
26
6
12
22
10
14
18
16
20
24
IIP3
CONVERSION LOSS
VCC = 3V
VCC = 3.3V
VCC = 3.6V
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
8
12
5548 G08
44 63 5 7 98 1110
26
6
12
22
10
14
18
16
20
24
IIP3
CONVERSION LOSS
VCC = 3V
VCC = 3.3V
VCC = 3.6V
LTC5548 \\ 1 1\ I\ RIB L7 HEW
LTC5548
7
5548f
For more information www.linear.com/LTC5548
Typical perForMance characTerisTics
RF Isolation
Conversion Loss and IIP3 vs IF
Frequency (Low Side LO) Input P1dB vs RF Frequency
LO Leakage
2GHz to 12GHz downmixer application.
VCC = 3.3V, EN = high, X2 = low, TC = 25°C, PLO = 0dBm, PRF = –5dBm (–5dBm/tone for two-tone IIP3 tests, Δf = 2MHz), IF = 240MHz,
unless otherwise noted. Test circuit shown in Figure 1.
IF FREQUENCY (GHz)
0
CONVERSION LOSS (dB), IIP3 (dBm)
10
3
5548 G09
61 20.5 1.5 2.5
28
8
14
24
12
16
20
18
22
26
CONVERSION LOSS
IIP3
RF = 5.8GHz
RF = 9.8GHz
RF FREQUENCY (GHz)
2
INPUT P1dB (dBm)
10
12
5548 G10
84 63 5 7 8 109 11
16
9
12
14
11
13
15
HIGH SIDE LO
LOW SIDE LO
LO FREQUENCY (GHz)
1 2
LO LEAKAGE (dBm)
–30
12
5548 G11
–50 4 63 5 7 8 109 11
–10
–40
–20
LO-IF
LO-RF
RF FREQUENCY (GHz)
2
RF ISOLATION (dB)
40
12
5548 G12
30 4 63 5 7 8 109 11
65
35
50
45
55
60 RF-LO
RF-IF
5.8GHz IIP3 Histogram
5.8GHz Conversion Loss
Histogram
CONVERSION LOSS (dB)
6.6
DISTRIBUTION (%)
20
7.6
5548 G13
06.8 7.06.7 6.9 7.1 7.2 7.47.3 7.5
80
10
30
60
40
50
70
85°C
25°C
–40°C
IIP3 (dBm)
22.8
DISTRIBUTION (%)
25.6
5548 G14
0
23.6 24.423.2 24 24.8 25.2
35
5
10
25
15
20
30
85°C
25°C
–40°C
LTC5548 ‘\ ‘\ / /\\ Y ( 8 L7HQEQB
LTC5548
8
5548f
For more information www.linear.com/LTC5548
Typical perForMance characTerisTics
Conversion Loss and IIP3 vs
RF Frequency (High Side LO)
Conversion Loss and IIP3
vs RF Frequency (High Side LO)
Conversion Loss and IIP3
vs RF Frequency (High Side LO)
Conversion Loss and IIP3
vs IF Frequency (Low Side LO) Input P1dB vs RF Frequency LO and 2LO Leakage to IF
Conversion Loss and IIP3 vs
RF Frequency (Low Side LO)
Conversion Loss and IIP3
vs RF Frequency (Low Side LO)
Conversion Loss and IIP3
vs RF Frequency (Low Side LO)
2GHz to 12GHz downmixer application with LO
frequency doubler enabled. VCC = 3.3V, EN = high, X2 = high, TC = 25°C, PLO = 0dBm, PRF = –5dBm (–5dBm/tone for two-tone IIP3
tests, Δf = 2MHz), IF = 240MHz, unless otherwise noted. Test circuit shown in Figure 1.
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
8
12
5548 G15
44 63 5 7 8 109 11
26
6
20
10
16
12
14
18
22
24 IIP3
CONVERSION LOSS
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
8
12
5548 G14
44 63 5 7 8 109 11
26
6
20
10
16
12
14
18
22
24 IIP3
CONVERSION LOSS
PLO = –6dBm
PLO = 0dBm
PLO = 3dBm
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
8
12
5548 G15
44 63 5 7 8 109 11
26
6
20
10
16
12
14
18
22
24 IIP3
CONVERSION LOSS
VCC = 3V
VCC = 3.3V
VCC = 3.6V
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
8
12
5548 G16
44 63 5 7 8 109 11
26
6
20
10
16
12
14
18
22
24 IIP3
CONVERSION LOSS
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
8
12
5548 G18
44 63 5 7 8 109 11
26
6
20
10
16
12
14
18
22
24 IIP3
CONVERSION LOSS
VCC = 3V
VCC = 3.3V
VCC = 3.6V
IF FREQUENCY (GHz)
0
CONVERSION LOSS (dB), IIP3 (dBm)
8
3
5548 G19
41 20.5 1.5 2.5
26
6
12
22
10
14
18
16
20
24
CONVERSION LOSS
IIP3
RF = 5.8GHz
RF = 9.8GHz
RF FREQUENCY (GHz)
2
INPUT P1dB (dBm)
10
12
5548 G20
94 63 5 7 8 109 11
16
12
14
11
13
15
HIGH SIDE LO
LOW SIDE LO
LO FREQUENCY (GHz)
1 2
LO AND 2LO LEAKAGE (dBm)
–30
5
5548 G21
–50 43
–10
–40
–20
LO-IF
2LO-IF
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
8
12
5548 G17
44 63 5 7 8 109 11
26
6
20
10
16
12
14
18
22
24
IIP3
CONVERSION LOSS
PLO = –6dBm
PLO = 0dBm
PLO = 3dBm
LTC5548 L7 HEW 9
LTC5548
9
5548f
For more information www.linear.com/LTC5548
Typical perForMance characTerisTics
Conversion Loss and IIP3 vs
RF Frequency (High Side LO)
Conversion Loss and IIP3
vs RF Frequency (High Side LO)
Conversion Loss and IIP3
vs RF Frequency (High Side LO)
Conversion Loss and IIP3
vs IF Frequency (Low Side LO) Input P1dB vs IF Frequency IF Isolation
Conversion Loss and IIP3 vs
RF Frequency (Low Side LO)
Conversion Loss and IIP3
vs RF Frequency (Low Side LO)
Conversion Loss and IIP3
vs RF Frequency (Low Side LO)
2GHz to 12GHz upmixer application.
VCC = 3.3V, EN = high, X2 = low, TC = 25°C, PLO = 0dBm, PIF = –5dBm (–5dBm/tone for two-tone IIP3 tests, Δf = 2MHz), IF = 240MHz,
unless otherwise noted. Test circuit shown in Figure 1.
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
10
12
5548 G22
64 63 5 7 8 109 11
28
8
22
12
18
14
16
20
24
26 IIP3
CONVERSION LOSS
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
10
12
5548 G23
64 63 5 7 8 109 11
28
8
22
12
18
14
16
20
24
26
IIP3
CONVERSION LOSS
PLO = –6dBm
PLO = 0dBm
PLO = 6dBm
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
10
12
5548 G24
64 63 5 7 8 109 11
28
8
22
12
18
14
16
20
24
26
IIP3
CONVERSION LOSS
VCC = 3V
VCC = 3.3V
VCC = 3.6V
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
10
12
5548 G25
64 63 5 7 8 109 11
28
8
22
12
18
14
16
20
24
26
IIP3
CONVERSION LOSS
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
10
12
5548 G26
64 63 5 7 8 109 11
28
8
22
12
18
14
16
20
24
26
IIP3
CONVERSION LOSS
PLO = –6dBm
PLO = 0dBm
PLO = 6dBm
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
10
12
5548 G27
64 63 5 7 8 109 11
28
8
22
12
18
14
16
20
24
26
IIP3
CONVERSION LOSS
VCC = 3V
VCC = 3.3V
VCC = 3.6V
IF FREQUENCY (GHz)
0
CONVERSION LOSS (dB), IIP3 (dBm)
10
3
5548 G28
61 20.5 1.5 2.5
32
8
14
24
12
16
20
18
22
26
28
30
CONVERSION LOSS
IIP3
RF = 5.8GHz
RF = 9.8GHz
IF FREQUENCY (GHz)
0
INPUT P1dB (dBm)
11
3
5548 G29
10 1 20.5 1.5 2.5
17
13
12
14
15
16
LS LO, RF = 5.8GHz
LS LO, RF = 9.8GHz
IF-RF
IF FREQUENCY (GHz)
0
IF ISOLATION (dB)
30
3
5548 G30
20 1 20.5 1.5 2.5
90
50
40
60
70
80
IF-LO
LTC5548 v \ é: K \ ( 2 ,, F .../ 1 O L7HCUEQB
LTC5548
10
5548f
For more information www.linear.com/LTC5548
Typical perForMance characTerisTics
Conversion Loss and IIP3
vs RF Frequency (High Side LO)
Conversion Loss and IIP3 vs
RF Frequency (High Side LO)
Conversion Loss and IIP3
vs RF Frequency (High Side LO)
Conversion Loss and IIP3 vs IF
Frequency (Low Side LO) Input P1dB vs IF Frequency LO and 2LO Leakage to RF
Conversion Loss and IIP3 vs
RF Frequency (Low Side LO)
Conversion Loss and IIP3 vs
RF Frequency (Low Side LO)
Conversion Loss and IIP3 vs
RF Frequency (Low Side LO)
2GHz to 12GHz upmixer application with LO
frequency doubler enabled. VCC = 3.3V, EN = high, X2 = high, TC = 25°C, PLO = 0dBm, PIF = –5dBm (–5dBm/tone for two-tone IIP3
tests, Δf = 2MHz), output measured at 5.8GHz, unless otherwise noted. Test circuit shown in Figure 1.
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
10
12
5548 G31
64 63 5 7 8 109 11
28
8
22
12
18
14
16
20
24
26 IIP3
CONVERSION LOSS
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
10
12
5548 G32
64 63 5 7 8 109 11
28
8
22
12
18
14
16
20
24
26
IIP3
CONVERSION LOSS
PLO = –6dBm
PLO = 0dBm
PLO = 3dBm
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
10
12
5548 G33
64 63 5 7 8 109 11
28
8
22
12
18
14
16
20
24
26
IIP3
CONVERSION LOSS
VCC = 3V
VCC = 3.3V
VCC = 3.6V
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
10
12
5548 G34
64 63 5 7 8 109 11
26
8
22
12
18
14
16
20
24 IIP3
CONVERSION LOSS
TC = –40°C
TC = 25°C
TC = 85°C
TC = 105°C
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
10
12
5548 G35
64 63 5 7 8 109 11
26
8
22
12
18
14
16
20
24 IIP3
CONVERSION LOSS
PLO = –6dBm
PLO = 0dBm
PLO = 3dBm
RF FREQUENCY (GHz)
2
CONVERSION LOSS (dB), IIP3 (dBm)
10
12
5548 G33
64 63 5 7 8 109 11
26
8
22
12
18
14
16
20
24 IIP3
CONVERSION LOSS
VCC = 3V
VCC = 3.3V
VCC = 3.6V
IF FREQUENCY (GHz)
0
CONVERSION LOSS (dB), IIP3 (dBm)
10
3
5548 G37
61 20.5 1.5 2.5
32
8
14
24
12
16
20
18
22
26
28
30
CONVERSION LOSS
IIP3
RF = 5.8GHz
RF = 9.8GHz
IF FREQUENCY (GHz)
0
INPUT P1dB (dBm)
11
3
5548 G38
10 1 20.5 1.5 2.5
17
13
12
14
15
16
LS LO, RF = 5.8GHz
LS LO, RF = 9.8GHz
LO FREQUENCY (GHz)
1
LO AND 2LO LEAKAGE (dBm)
–40
6
5548 G39
–50 32 4 5
–10
–20
–30
LO-RF
2LO-RF
LTC5548 L7 LJUW 1 1
LTC5548
11
5548f
For more information www.linear.com/LTC5548
pin FuncTions
GND (Pins 1, 4, 6, 10, 12, Exposed Pad Pin 13): Ground.
These pins must be soldered to the RF ground on the circuit
board. The exposed pad metal of the package provides
both electrical contact to ground and good thermal contact
to the printed circuit board.
IF+, IF– (Pins 2, 3): Differential Terminals for the IF. These
pins may be used for a differential IF or connected to an
external balun if a single-ended IF port is needed. The IF
port can be used from DC up to 6GHz depending on the
external balun bandwidth.
RF (Pin 5): Single-Ended Terminal for the RF Port. This
pin is internally connected to the primary side of the RF
transformer, which has low DC resistance to ground. A
series DC blocking capacitor must be used to avoid damage
to the integrated transformer if DC voltage is present. The
RF port is impedance matched from 2GHz to 14GHz as
long as the LO is driven with a 0 ±6dBm source between
1GHz and 12GHz.
EN (Pin 7): Enable Pin. When the voltage applied to this
pin is greater than 1.2V, the mixer is enabled. When the
voltage is less than 0.3V, the mixer is disabled. Typical
input current is less than 30μA. This pin has an internal
376kΩ pull-down resistor.
X2 (Pin 8): Digital Control Pin for LO Frequency Doubler.
When the voltage applied to this pin is greater than 1.2V,
the LO frequency doubler is enabled. When the voltage DC
is less than 0.3V, the LO frequency doubler is disabled.
Typical input current is less than 30μA. This pin has an
internal 376kΩ pull-down resistor.
VCC (Pin 9): Power Supply Pin. This pin must be externally
connected to a regulated 3.3V supply, with a bypass capaci-
tor located close to the pin. Typical current consumption
is 120mA when the part is enabled.
LO (Pin 11): Input for the Local Oscillator (LO). A series
DC blocking capacitor must be used. Typical DC voltage
at this pin is 1.6V.
block DiagraM
5548 BD
LTC5548
RF
9
5
X2 VCC
EN
7
IF+
IF–
LO
11
X2
23
LO
AMP
MIXER
CORE
GND PINS ARE NOT SHOWN.
8
REF/BIAS
LTC5548
LTC5548
12
5548f
For more information www.linear.com/LTC5548
TesT circuiT
Figure 1. Standard Test Circuit Schematic
REF DES VALUE SIZE VENDOR COMMENT
C1, C3 0.15pF 0402 AVX ACCU-P 04021JR15ZBS
C2, C4 22pF 0402 AVX 0402A220JAT2A
C5 1µF 0603 Murata GRM188R71A105KA61
T1 TC1-1-13M+* Mini Circuits IF = 4.5MHz to 3GHz
TCM1-83X+ Mini Circuits IF = 10MHz to 6GHz
* Standard Evaluation Board Configuration
RF
RF
50Ω
IF
50Ω
LO
50Ω
VCC
(3.0V TO 3.6V)
C4
5548 F01
5 11
GND
T1
13
GND
LTC5548
GNDIF+
IF–
EN
EN
VCC
X2
4 12
2 13
8 97
GND
C2
LO
GND
GND
6 10
X2 C5
C3ZO = 50Ω
L = 3.55mm
ZO = 50Ω
L = 1.4mm
C1
••
LTC5548 wk \ :é/ \: \ VAAV \ x’fi’ ALYQHQ 13
LTC5548
13
5548f
For more information www.linear.com/LTC5548
applicaTions inForMaTion
Introduction
The LTC5548 consists of a high linearity double-balanced
mixer core, LO buffer amplifier, LO frequency doubler and
bias/enable circuits. See the Block Diagram section for a
description of each pin function. The RF and LO are single-
ended terminals. The IF is differential. An external balun is
needed if a single-ended IF signal is desired. The LTC5548
can be used as a frequency downconverter where the RF
is used as an input and IF is used as an output. It can also
be used as a frequency upconverter where the IF is used
as an input and RF is used as an output. Low side or high
side LO injection can be used. The evaluation circuit and the
evaluation board layout are shown in Figure 1 and Figure 2,
respectively.
Figure 2. Evaluation Board Layout
Figure 3. Simplified RF Port Interface Schematic
Figure 4. RF Port Return Loss (a) C1 = 0.15pF (b) C1 Open
(b)
(a)
RF Port
The mixer’s RF port, shown in Figure 3, is connected to the
primary winding of an integrated transformer. The primary
side of the RF transformer is DC-grounded internally and
the DC resistance of the primary side is approximately
3.2Ω. A DC blocking capacitor is needed if the RF source
has DC voltage present. The secondary winding of the
RF transformer is internally connected to the mixer core.
LTC5548
RF
5548 F03
5
RF
50Ω
ZO = 50Ω
L = 1.4mm
C1
RF FREQUENCY (GHz)
2
RF RETURN LOSS (dB)
30
14
5548 F04a
40 4 6 83 5 7 9 11 1210 13
0
35
20
10
25
15
5
IF = 240MHz
IF = 1890MHz
IF = 4000MHz
RF FREQUENCY (GHz)
2
RF RETURN LOSS (dB)
30
11
5548 F04b
35 468357910
0
20
10
25
15
5
IF = 240MHz
IF = 1890MHz
IF = 4000MHz
LTC5548
LTC5548
14
5548f
For more information www.linear.com/LTC5548
applicaTions inForMaTion
Figure 5. Simplified LO Input Schematic
The RF port is broadband matched to 50Ω from 2GHz to
14GHz with a 0.15pF shunt capacitor (C1) located 1.4mm
away from the RF pin. The RF port is 50Ω matched from
2GHz to 10GHz without C1. An LO between –6dBm and
6dBm is required for good RF impedance matching. The
measured RF input return loss is shown in Figure 4 for
IF frequencies of 240MHz, 1890MHz and 4GHz with low
side LO.
The RF input impedance and input reflection coefficient
versus RF frequency is listed in Table 1. The reference plane
for this data is Pin 5 of the IC, with no external matching,
and the LO is driven at 7.5GHz.
Table 1. RF Input Impedance and S11 (at Pin 5, No External
Matching, LO Input Driven at 7.5GHz)
FREQUENCY
(GHz)
INPUT
IMPEDANCE
S11
MAG ANGLE
2 34.3+j28.9 0.37 99.6
3 49.4+j24.7 0.24 77.4
4 57.2-j3.8 0.08 –25.8
5 37.7+j4.4 0.15 157.4
6 43.4+j2.2 0.07 160.2
7 46.2-j1.9 0.04 –152.3
8 47.8-j1.1 0.02 –155.0
Table 1. RF Input Impedance and S11 (at Pin 5, No External
Matching, LO Input Driven at 7.5GHz)
9 48.8+j0.6 0.01 152.8
10 46.1+j9.1 0.10 107.8
11 35.8+j3.2 0.17 165.2
12 16.3+j4.1 0.51 169.5
13 10.9+j2.3 0.64 174.5
14 12.9-j3.5 0.59 –171.4
LO Input
The mixer’s LO input, shown in Figure 5, consists of a
single-ended to differential conversion, high speed limit-
ing differential amplifier and an LO frequency doubler.
The LO amplifier is optimized for the 1GHz to 12GHz LO
frequency range. LO frequencies above or below this fre-
quency range may be used with degraded performance.
The LO frequency doubler is controlled by a digital voltage
input at X2 (Pin 8). When the X2 voltage is higher than
1.2V, the LO frequency doubler is enabled. When X2 is left
open or its voltage is lower than 0.3V, the LO frequency
doubler is disabled.
The DC voltage at the LO input is about 1.6V. A DC block-
ing capacitor (C4) is required.
LTC5548
LO
X2 VCC
5548 F05
X2
8 9
11
LO
Z0 = 50Ω
L = 3.55mm C4
C3
LTC5548 L7HEJWEGR 1 5
LTC5548
15
5548f
For more information www.linear.com/LTC5548
Figure 6. LO Input Return Loss
applicaTions inForMaTion
The LO is 50Ω matched from 1GHz to 12GHz, with a 0.15pF
shunt capacitor (C3) located 3.55mm away from the LO
pin. External matching components may be needed for
extended LO operating frequency range. The measured LO
input return loss is shown in Figure 6. The LO return loss
does not change when LO frequency double is enabled.
The nominal LO input level is 0dBm, although the limiting
amplifiers will deliver excellent performance over a ±6dBm
input power range.
LO FREQUENCY (GHz)
1
LO RETURN LOSS (dB)
13
5548 F06a
30 3 5 72 4 6 8 10 119 12
0
20
10
25
15
5
X2 = LOW, EN = HIGH
X2 = LOW, EN = LOW
X2 = HIGH, EN = HIGH
LO FREQUENCY (GHz)
1
LO RETURN LOSS (dB)
13
5548 F06b
30 3 5 72 4 6 8 10 119 12
0
20
10
25
15
5
X2 = LOW, EN = HIGH
X2 = LOW, EN = LOW
X2 = HIGH, EN = HIGH
(a) C3 = 0.15pF
(b) C3 Open
The LO input impedance and input reflection coefficient
versus frequency, is shown in Table 2.
Table 2. LO Input Impedance vs Frequency (at Pin 11, No
External Matching)
FREQUENCY
(GHz)
INPUT
IMPEDANCE
S11
MAG ANGLE
1 63.8-j17.4 0.19 –42.9
2 58.1-j12.7 0.14 –50.8
3 50.5-j10.8 0.11 –81.2
4 43.4-j9.1 0.12 –120.4
5 36.7+j4.6 0.16 157.9
6 30.9-j6.8 0.25 –155.6
7 28.1-j6.3 0.29 –159.3
8 28.7-j5.1 0.28 –162.8
9 28.9-j2.2 0.27 –172.5
10 26.4+j2.6 0.31 171.8
11 24.1+j3.1 0.35 170.8
12 24.3+j0.3 0.35 179.1
LTC5548
LTC5548
16
5548f
For more information www.linear.com/LTC5548
Figure 7. Simplified IF Port Schematic Figure 8. IF Port Return Loss
LTC5548 IF+
IF–
5548 F07
3 2
applicaTions inForMaTion
IF Port
The mixer’s IF port is differential as shown in Figure 7. ESD
protection diodes are connected to both of these ports.
The impedance of the IF+ and IF– terminals is approxi-
mately 25Ω in parallel with 0.25pF. An external 1:1 balun
is required for a 50Ω single-ended IF. Using a TC1-1-13M+
balun, for example, the IF port is broadband matched from
4.5MHz to 3GHz, when the LO is applied.
The measured IF port return loss is shown in Figure 8.
The differential IF output of the LTC5548 is suitable for
directly driving a wideband differential amplifier or filter.
Figure 9 shows a schematic for the evaluation of LTC5548
with a differential IF at very low IF frequency.
Figure 9. Test Circuit for Wideband Differential Output at IF Frequency of 10kHz to 20MHz
5548 F09
LTC5548
RF
9
5
X2 VCC
EN
7
IF+
IF–
LO
11
X2
23
LO
AMP
MIXER
CORE
8
REF/BIAS
Z0 = 50Ω
L = 1.4mm
0.15pF
RF Z0 = 50Ω
L = 3.55mm
0.15pF
22pF
LO
VCC
3.3V
22pF 1µF
EN
X2
35.7Ω
34.8Ω
IF–
50Ω
35.7Ω
34.8Ω
IF+
50Ω
50Ω
L-PADS AND 180° COMBINER FOR
50Ω SINGLE-ENDED MEASUREMENT
0°
180°
IF
50Ω
10kHz TO 20MHz
COMBINER
ZMSCJ-2-2
OUT
IF FREQUENCY (GHz)
0.5
IF RETURN LOSS (dB)
30
6
5548 F08
35 1.5 2.5 3.51 2 3 4 4.5 5 5.5
0
20
10
25
15
5
TC1-1-13M+
TCM1-83X+
LTC5548 L7HEJWEGR 1 7
LTC5548
17
5548f
For more information www.linear.com/LTC5548
applicaTions inForMaTion
The complete test circuit, shown in Figure 9, uses resistive
impedance matching attenuators (L-pads) on an evaluation
board to transform each 25Ω IF output to 50Ω. An exter-
nal 0°/180° power combiner is then used to convert the
100Ω differential output to 50Ω single-ended to facilitate
measurement. The measured performance is shown in
Figure 10. The measured results do not include the loss
of the L-pads and external 180° combiner.
Enable Interface
Figure 11 shows a simplified schematic of the EN pin
interface. To enable the chip, the EN voltage must be
higher than 1.2V. The voltage at the EN pin should never
exceed VCC by more than 0.3V. If this should occur, the
supply current could be sourced through the ESD diode,
potentially damaging the IC. If the EN pin is left floating,
its voltage will be pulled low by the internal pull-down
resistor and the chip will be disabled.
X2 Interface
Figure 12 shows a simplified schematic of the X2 pin
interface. To enable the integrated LO frequency doubler,
the X2 voltage must be higher than 1.2V. The X2 voltage
at the pin should never exceed VCC by more than 0.3V. If
this should occur, the supply current could be sourced
through the ESD diode, potentially damaging the IC. If the
X2 pin is left floating, its voltage will be pulled low by the
internal pull-down resistor and the LO frequency doubler
will be disabled.
Supply Voltage Ramping
Fast ramping of the supply voltage can cause a current
glitch in the internal ESD protection circuits. Depending on
the supply inductance, this could result in a supply volt-
age transient that exceeds the maximum rating. A supply
voltage ramp time of greater than 1ms is recommended.
Figure 10. Conversion Gain and IIP3 for Differential
IF Frequency of 10kHz to 20MHz
IF FREQUENCY (kHz)
0
CONVERSION LOSS (dB), IIP3 (dBm)
7
20000
5548 F10
54000 8000 12000 16000
25
11
15
9
13
23
CONVERSION LOSS
IIP3
RF = 5.8GHz
LS LO
Figure 11. Simplified Enable Input Circuit Figure 12. Simplified X2 Interface Circuit
LTC5548
EN
5548 F11
7
VCC
9
BIAS
LTC5548
X2
5548 F12
8
VCC
9
LTC5548
LTC5548
18
5548f
For more information www.linear.com/LTC5548
applicaTions inForMaTion
Spurious Output Levels
Mixer spurious output levels versus harmonics of the
RF and LO are tabulated in Table 3. The spur levels were
measured on a standard evaluation board using the test
circuit shown in Figure 1. The spur frequencies can be
calculated using the following equation:
Frequency Downconversion: fSPUR = (M • fRF)±(N • fLO)
Frequency Upconversion: fSPUR = (M • fIF)±(N • fLO)
Table 3a. Downconversion IF Output Spur Levels (dBc): LO Frequency Doubler Off (X2 = Low): fSPUR = (M • fRF) – (N • fLO)
RF = 5250MHz, PRF = –6dBm, PLO = 0dBm, LO = 4900MHz
N
M
0 1 2 3 4 5
0 –25 –5 –37 –45 *
1 –51 0 –42 –16 –59 –56
2 –72 –69 –81 –77 –71 –75
3 –75 –72 –78 –61 –79 –69
4 * –75 –77 –79 –81 –78
5 * * –74 –78 –77 –81
*Out of the test equipment range.
Table 3b. Downconversion IF Output Spur Levels (dBc): LO Frequency Doubler On (X2 = High): fSPUR = (M • fRF) – (N • fLO)
RF = 5252MHz, PRF = –6dBm, PLO = 0dBm, LO = 2450MHz
N
M
0 1 2 3 4 5 6 7 8
0 –24 –14 –8 –5 –22 –32 –32 –51
1 –25 –18 0 –18 –29 –28 –18 –29 –43
2 –67 –77 –64 –61 –60 –61 –68 –70 –65
3 –75 –74 –72 –78 –72 –76 –63 –69 –78
4 * –76 –74 –74 –74 –76 –67 –77 –68
5 * * * –75 –75 –74 –69 –66 –70
*Out of the test equipment range.
LTC5548 HE L 1% a 9 U \mi ‘Tmm‘ .‘M/if fl 6: 3% LR; a 19 L7 LJUW
LTC5548
19
5548f
For more information www.linear.com/LTC5548
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
package DescripTion
UDB Package
Variation A
12-Lead Plastic QFN (3mm × 2mm)
(Reference LTC DWG # 05-08-1985 Rev Ø)
Please refer to http://www.linear.com/product/LTC5548#packaging for the most recent package drawings.
BOTTOM VIEW—EXPOSED PAD
SIDE VIEW
0.75 ±0.05
R = 0.13
TYP
0.20 REF
(UDB12) DFN 0814 REV 0
0.60 ±0.10
0.15 REF
0.40 REF
0.40 ±0.10
0.40 ±0.10
1
3
46
7
9
10 12
0.50 ±0.10
0.50 ±0.10
3.00 ±0.10
0.77 ±0.10
DETAIL A
0.25 ±0.10
0.05 REF
2.00 ±0.10 DETAIL A
0.25 ±0.05
0.50 BSC
0.00 – 0.05
0.77 ±0.05
DETAIL B
0.25 ±0.05
0.05 REF
0.25 ±0.05
0.75 ±0.05
3.50 ±0.05
0.65 ±0.05
2.50 ±0.05
PACKAGE
OUTLINE
0.50 BSC
DETAIL B
0.85 ±0.05
NOTE:
1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED
LTC5548 L7LJCUEN2
LTC5548
20
5548f
For more information www.linear.com/LTC5548
LINEAR TECHNOLOGY CORPORATION 2016
LT 0216 • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LTC5548
relaTeD parTs
Typical applicaTion
PART NUMBER DESCRIPTION COMMENTS
Mixers, Modulators and Demodulators
LTC5549 2GHz to 14GHz Microwave Mixer 8dB Conversion Loss, 24dBm IIP3, 500MHz to 6GHz Single-Ended IF with Integrated
Balun
LTC5544 4GHz to 6GHz Downconverting Mixer 7.5dB Gain, >25dBm IIP3 and 10dB NF, 3.3V/200mA Supply
LTC5576 3GHz to 8GHz High Linearity Active
Upconverting Mixer
25dBm OIP3, –0.6dB Gain, 14.1dB NF, –154dBm/Hz Output Noise Floor, –28dBm LO
Leakage at 8GHz
LTC5551 300MHz to 3.5GHz Ultrahigh Dynamic Range
Downconverting Mixer
+36dBm IIP3; 2.4dB Gain, <10dB NF, 0dBm LO Drive, +18dBm P1dB,
670mW Power Consumption
LTC5567 400MHz to 4GHz, Active Downconverting Mixer 1.9dB Gain, 26.9dBm IIP3 and 11.8dB NF at 1950MHz, 3.3V/89mA Supply
LTC5577 300MHz to 6GHz High Signal Level Active
Downconverting Mixer
50Ω Matched Input from 1.3GHz to 4.3GHz, 30dBm IIP3, 0dB Gain,
>40dB LO-RF Isolation, 0dBm LO Drive
LTC5510 1MHz to 6GHz Wideband High Linearity Active
Mixer
50Ω Matched Input from 30MHz to 6GHz, 27dBm OIP3, 1.5dB Gain,
Up- or Down-Conversion
LTC5585 4GHz Wideband I/Q Demodulator 400MHz to 4GHz Direct Conversion, 25.7dBm IIP3; 60dBm, IIP2 Adjustable to >85dBm,
DC Offset Cancellation, >500MHz I & Q Bandwidth
LTC5588-1 6GHz I/Q Modulator 200MHz to 6GHz Direct Conversion, 31dBm OIP3 Adjustable to 34dBm, –160dBm/Hz
Output Noise Floor, Excellent ACPR
Amplifiers
LTC6430-20 High Linearity Differential IF Amp 20MHz to 2GHz Bandwidth, 20.8dB Gain, 51dBm OIP3, 2.9dB NF at 240MHz
LTC6431-20 High Linearity Single-Ended IF Amp 20MHz to 1.4GHz Bandwidth, 20.8dB Gain, 46.2dBm OIP3, 2.6dB NF at 240MHz
RF Power Detectors
LTC5564 15GHz Ultra Fast 7ns Response Time RF
Detector with Comparator
600MHz to 15GHz, –24dB to 16dBm Input Power Range, 9ns Comparator Response
Time, 125°C Version
LT5581 6GHz Low Power RMS Detector 40dB Dynamic Range, ±1dB Accuracy Over Temperature, 1.5mA Supply Current
LTC5582 40MHz to 10GHz RMS Detector ±0.5dB Accuracy Over Temperature, ±0.2dB Linearity Error, 57dB Dynamic Range
LTC5583 Dual 6GHz RMS Power Detector Up to 60dB Dynamic Range, ±0.5dB Accuracy Over Temperature, >50dB Isolation
RF PLL/Synthesizer with VCO
LTC6948 Ultralow Noise, Low Spurious Frac-N PLL with
Integrated VCO
373MHz to 6.39GHz, –157dBc/Hz WB Phase Noise Floor, –274dBc/Hz Normalized
In-Band 1/f Noise
Conversion Loss and IIP3 vs Input
Frequency (High Side LO)
Wideband 10MHz to 6GHz Upconversion to 6.5GHz
10MHz TO 6GHz
TCM1-83X+
ZO = 50Ω
L = 3.55mm
6.5GHz
6.51GHz to 12.5GHz
IF+
IF–
5548 TA02a
22pF 0.15pF
••
LTC5548
LO
RF
INPUT FREQUENCY (GHz)
0
CONVERSION LOSS (dB), IIP3 (dBm)
8
6
5548 TA02b
60.5 1 1.5 2 2.5 3 3.5 4 4.5 5.55
28
12
16
10
14
20
24
18
22
26
CONVERSION LOSS
IIP3
RFOUT = 6.5GHz
LO DOUBLER OFF
TC = 25°C