Micrel Inc. 的 MICRF113 规格书

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MICRF113

300MHz to 450MHz +10dBm

ASK Transmitter in SOT23

QwikRadio is a registered trademark of Micrel, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

November 2010 M9999-112310

General Description

The MICRF113 is a high-performance, easy-to-use, single-

chip ASK Transmitter IC for remote wireless applications in

the 300MHz to 450MHz frequency band. This transmitter

IC is a true “data-in, antenna-out” monolithic device.

MICRF113 has three strong attributes: power delivery,

operating voltage and operating temperature. In terms of

power, the MICRF113 is capable of delivering +10dBm

into a 50 load. This power level enables a small form

factor transmitter (lossy antenna) such as a key fob

transmitter to operate near the maximum limit of

transmission regulations. In terms of operating voltage, the

MICRF113 operates from 1.8V to 3.6V. Many transmitter

ICs in the same frequency band stop operating below

2.0V. The MICRF113 will work with most batteries to the

end of their useful limits. In terms of operating

temperature, the MICRF113 operates from −40°C to

+85°C.

The MICRF113 is easy to use. It requires a reference

frequency (RF carrier frequency divided by 32 times)

generated from a crystal with a few additional external

parts to create a complete versatile transmitter.

The MICRF113 operates with Amplitude Shift Keying/On-

Off Keyed (ASK/OOK) UHF receiver types from wide-band

super-regenerative radios to narrow-band, high-

performance super-heterodyne receivers. The

MICRF113’s maximum ASK bit rate is 20kbps (minimum

pulse width of 50µs at ASK pin).

The MICRF113 transmitter solution is ideal for industrial

and consumer applications where simplicity and form

factor are important.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

• Complete UHF ASK transmitter

• Frequency range 300MHz to 450MHz

• Bit rates up to 20kbps

• Output power up to 10dBm

• Low external part count

• Low voltage operation (down to 1.8V)

• Operate with crystals or ceramic resonators

• 6-pin SOT23

Applications

• Fan Controllers

• Remote Power Switches

• Multimedia Remote Control

• Remote Sensor Data Links

• Infrared Transmitter Replacement

Ordering Information

Part Number Temperature Range Package

MICRF113YM6 −40°C to +85°C SOT23-6

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Typical Application

Figure 1. Typical Application Circuit for 433.92MHz and 315MHz

(component values for 315MHz in parenthesis)

Pin Configuration

Pin Description

Pin Number

MSOP-6 Pin Name Pin Function

1 PAOUT PA output

2 VSS Ground

3 VDD Positive Power Supply Voltage (Input)

4 XTLOUT Crystal Out (Output): Reference Oscillator Output Connection.

5 XTLIN Crystal In (Input): Reference Oscillator Input Connection.

6 ASK ASK DATA Input

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November 2010 3 M9999-112310

Absolute Maximum Ratings(1)

Supply Voltage VDD .....................................................+5.0V

Voltage on PAOUT ........................................................+7.2V

Voltage on I/O Pins ............................ VSS – 0.3 to VDD + 0.3

Storage Temperature Range ...................−65°C to + 150°C

Lead Temperature (soldering, 10s)......................... + 300°C

ESD Rating(3).................................................................. 2kV

Operating Ratings(2)

Supply Voltage VDD .......................................... 1.8V to 3.6V

Ambient Operating Temperature (TA) ......... –40°C to +85°C

Transmitter Frequency Range ............. 300MHz to 450MHz

Electrical Characteristics(4)

VDD = 3.0V, TA = 25°C, FreqREFOSC = 13.560MHz. Bold values indicate –40°C to 85°C unless otherwise noted. 2kbps bit rate, 50 load.

Parameter Condition Min. Typ. Max. Units

Power Supply

@ 315MHz, POUT = +10dBm 12.3 Mark Supply Current IMARK,

VASK = 3.0V @ 433.92MHz, POUT = +10dBm 12.5

@ 315MHz 2 SPACE Supply Current, ISPACE,

VASK = 0V @ 433.92 MHz 2

RF Output Section and Modulation Limits

@315MHz(4) 10

Output Power Level, POUT ASK "mark"

@433.92MHz(4) 10

dBm

@ 630MHz(4) 2nd harm. −39

Harmonics Output for 315MHz

@945MHz(4) 3rd harm. −53

dBc

@ 867.84MHz(4) 2nd harm. −55

Harmonics Output for 433.92MHz

@1301.76MHz(4) 3rd harm. −55

dBc

Extinction Ratio for ASK 70 dBc

ASK Modulation

Encoded Bit Rate 20 kbps

@315MHz(6) <700

Occupied Bandwidth

@433.92MHz(6) <1000

kHz

VCO Section

@ 100kHz from Carrier −76

315MHz Single-Side Band Phase Noise

@ 1000kHz from Carrier −79

dBc/Hz

@ 100kHz from Carrier −72

433.92MHz Single-Side Band Phase Noise

@ 1000kHz from Carrier −81

dBc/Hz

Notes:

1. Exceeding the absolute maximum rating may damage the device.

2. The device is not guaranteed to function outside its operating rating.

3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.

4. Measured using Test Circuit in Figure 2.

5. Dependent on crystal

6. RBW = 100kHz, OBW measured at −20dBc.

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November 2010 4 M9999-112310

Electrical Characteristics(4) (Continued)

VDD = 3.0V, TA = 25°C, FreqREFOSC = 13.560MHz. Bold values indicate –40°C to 85°C unless otherwise noted. 2kbps bit rate, 50 load.

Parameter Condition Min. Typ. Max. Units

Reference Oscillator Section

XTLIN, XTLOUT Pin capacitance 2 pF

External Capacitance From each side of the crystal to

GND 18 pF

Oscillator Startup Time(5) Crystal: HC49S 300 µs

Digital / Control Section

Output Blanking VDD transition from LOW to HIGH 500 µs

High (VIH) 0.8 × VDD

Digital Input ASK Pin

Low (VIL) 0.2 × VDD

High (VIH) 0.05

Digital Input Leakage Current ASK Pin Low (VIL) 0.05

µA

Undervoltage Lock Out (UVLO) 1.6 V

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Test Circuit

Figure 2. MICRF113 Test Circuit with 50 Output

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Micrel, Inc. MICRF113

November 2010 6 M9999-112310

Typical Characteristics − MICRF113 50 Test Board

315MHz OBW, ASK = 2kbps

315MHz OBW, ASK = 20kbps

CW Max Power @ 3V, 315MHz(1)

RF Spectrum 2nd Harmonic; Fundamental at 315MHz

RF Spectrum 3rd Harmonic; Fundamental at 315MHz

315MHz, Power Level at Space,

VDD = 3.0V, ASK = 2kbps, −62dBm

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November 2010 7 M9999-112310

Typical Characteristics − MICRF113 50 Test Board (Continued)

315MHz, Zero Span , ASK = 2kbps

315MHz, Zero Span, ASK = 20kbps

315MHz, Phase Noise, ASK = 2kbps,

100kHz Offset, –75.59dBc/Hz

315MHz, Phase Noise, ASK = 2kbps,

1MHz Offset, –78.99dBc/Hz

315MHz, Phase Noise, ASK = CW,

100kHz Offset, –70.96dBc/Hz

315MHz, Phase Noise, ASK = CW,

1MHz Offset, –76.72dBc/Hz

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Micrel, Inc. MICRF113

November 2010 8 M9999-112310

Typical Characteristics − MICRF113 50 Test Board (Continued)

433.92MHz OBW, ASK = 2kbps

433.92MHz OBW, ASK = 20kbps

433.92MHz, CW Max Power @ 3V, ASK = 2kbps(1)

RF Spectrum 2nd Harmonic; Fundamental at 433.92MHz

RF Spectrum 3rd Harmonic; Fundamental at 433.92MHz

433.92MHz Power Level at Space,

VDD = 3.0V, ASK = 2kbps, -52dBm

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Micrel, Inc. MICRF113

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Typical Characteristics − MICRF113 50 Test Board (Continued)

433.92MHz Zero Span, 2kbps

433.92ASK Zero Span at 20kbps

433.92MHz Phase Noise, ASK = CW,

100kHz Offset, −81.73dBc/Hz

433.92MHz Phase Noise, ASK = CW,

1MHz Offset, –78.49dBc/Hz

433.92MHz Phase Noise, ASK = 2kbps,

100kHz Offset, –71.64dBc/Hz

433.92MHz Phase Noise, ASK = 2kbps,

1MHz Offset, –79.4dBc/Hz

Micrel, Inc. MICRF113

November 2010 10 M9999-112310

Functional Diagram

Figure 3. MICRF113 Functional Block Diagram

of ri tern ta I— lal Oscillator Parameters for ASK O as refe r cry ’7 M‘CRHBASK

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Functional Description

Figure 3 is a functional block diagram of the MICRF113

transmitter. The MICRF113 is best described as a phase

locked transmitter. The MICRF113 system is partitioned

into five functional blocks:

• Crystal oscillator

• PLL×32

• Power amplifier

• Enable control

• Undervoltage detection

Crystal Oscillator

The reference oscillator is crystal-based Pierce

configuration, designed to accept crystals with frequency

from 9.375MHz to 14.0625MHz.

Crystal Oscillator Parameters for ASK Operation

Figure 4 shows a reference oscillator circuit

configuration for ASK operation. The reference oscillator

is capable of driving crystals with ESR range from 20

to 300.

When the ESR of crystal is at 20, the crystal parameter

limits are:

• ESR 20

• Cpar 2 to 10pF

• Cmo 10 to 40fF

ESR

XTLOUT

VSS

XTLIN

MICRF113 ASK

CRYSTAL MODEL

CLOAD

CPAR

CMO

CLOAD

Figure 4. Reference Oscillator ASK Operation

When the ESR of crystal is at 300, the crystal

parameter limits are:

• ESR 300

• C

PAR 2 to 5pF

• C

MO 10 to 40fF

• C

LOAD 10 to 30pF

PLL ×32

The function of PLL×32 is to provide a stable carrier

frequency for transmission. It is a “divide by 32” phase

locked loop oscillator.

Power Amplifier

The power amplifier serves two purposes: 1) to buffer

the VCO from external elements and 2) to amplify the

phase locked signal. The power amplifier can produce

+10dBm at 3V (typical).

Enable Control

Enable control gates the ASK data. It only allows

transmission when Lock, Amplitude and Under Voltage

Detect conditions are valid.

Undervoltage Detect

“Undervoltage detect” block senses operating voltage. If

the operating voltage falls below 1.6V, “undervoltage

detect” block will send a signal to “enable control” block

to disable the PA.

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Application Information

The MICRF113 is well suited to drive a 50 load,

monopole or a loop antenna. Figure 6 is an example of a

loop antenna configuration. Figure 6 also shows both

315MHz and 433.92MHz ASK configurations for a loop

antenna. Besides using a different crystal, Table 1 lists

modified values needed for the listed frequencies.

Frequency

(MHz)

(nH)

(pF)

(nH)

(pF) Y1 (MHz)

315.0 470 10 150 6.8 9.84375

433.92 820 12 68 4.7 13.5600

Table 1. Modified Values for Listed Frequencies

The reference design shown in Figure 6 has an antenna

optimized for using the matching network as described in

Table 1.

Power Amplitude Control Using External Resistor

R7 is used to adjust the RF amplitude output levels

which may be needed to meet compliance regulation. As

an example, the following tables list typical values of

conducted RF output levels and corresponding R7

resistor values for the 50 test board, as shown in

Figure 2. R7 of the TX113-1C Demo board using the

loop antenna can be adjusted for the appropriate

radiated field allowed by FCC or ETSI compliance.

Contact Micrel for suggested R7 values to meet FCC

and ETSI compliances.

50 Test Board, VDD = 3.0V

R7 () Output Power (dBm) IDD (mA)

0 10 12.3

75 8.5 11

100 8.0 10.5

500 3.0 7.3

1000 -2.0 5.9

Table 2. Output Power vs. External Resistor @ 315MHz

50 Test Board, VDD = 3.0V

R7 () Output Power (dBm) IDD (mA)

0 9.8 12.5

75 8.9 12

100 8.6 11.8

500 2.0 8.9

1000 −3.0 7.3

Table 3. Output Power vs. External Resistor @ 433.92MHz

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Notes:

1. Components labeled NP are not placed.

2. Values in parenthesis apply only to 315MHz option.

3. Value of R7 is selected to vary the output power.

Figure 6. ASK 433.92MHz and 315MHz

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Micrel, Inc. MICRF113

November 2010 14 M9999-112310

Output Power ON-OFF Control

There are two ways to enable the PA output power.

First, by supplying the ASK signal with VDD applied

continuously, resulting in a Mark and Space RF output

condition. A second method involves applying both VDD

and ASK synchronously. The second method allows for

longer battery usage since the battery is disconnected

during non-activation. Figure 7 shows the RF output time

response since VDD and the ASK are applied to the

MICRF113. The RF output response, as a function of

VDD, is typically less then 1.25mSec. This measurement

was done using the circuitry shown in Figure 2.

Note: The ASK signal should never be applied before

VDD.

Figure 7. RF Output Response (VDD and ASK)

Output Matching Network

Part of the function of the output network is to attenuate

the second and third harmonics. When matching to a

transmit frequency, care must be taken both to optimize

for maximum output power, and to attenuate unwanted

harmonics.

Layout Issues

PCB Layout is a primary concern for achieving optimum

performance and consistent manufacturing results. Care

must used with the orientation of components to ensure

that they do not couple or decouple the RF signal. PCB

trace length should be short to minimize parasitic

inductance (1 inch ~ 20nH). For example, depending

upon inductance values, a 0.5 inch trace can change the

inductance by as much as 10%. To reduce parasitic

inductance, the practice of using wide traces and a

ground plane under the signal traces is recommended.

Vias with low value inductance should be used for

components requiring a connection-to-ground.

Antenna Layout

Directivity is affected by antenna trace layout. No ground

plane should be under the antenna trace. For consistent

performance, components should not be placed inside

the loop of the antenna. Gerber formats (see Figure 8,

for a suggested layout) can be obtained from the Micrel

web site at: http://www.micrel.com.

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Micrel, Inc. MICRF113

November 2010 15 M9999-112310

Assembly Drawing Top Layer

Bottom Layer

Figure 8. PCB Demo Board

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November 2010 16 M9999-112310

Functional Description

Figure 8 shows the TX113-1c Demo Board PCB layout

and assembly (Gerber format). Figure 9 is a detailed

schematic of the TX113-1c. Note that components

labeled as NP (not placed) can be used to obtain

different configurations. Table 4 describes each header

pin connector used in the demo board.

Pin Function

Name Functional Description

J1-1 VDD 1.8V to 3.6V input voltage

J1-2 VSS Ground

J1-3 ASK Modulating Data Input

J2-1 REF-OSC External Reference Oscillator Input

J2-2 VSS Ground

Table 4. Demo Board Pin Names and Descriptions

Notes:

1. NP = Not Placed

2. Values in parenthesis apply only to 315MHz option.

3. R7 is selected to vary output power

Figure 9. TX113-1c Demo Board Schematic

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Bill of Materials (433.92MHz)

Item Part Number Manufacturer Description Qty.

C1 GRM21BR60J106K Murata(1) 10µF ±10%, 0805 capacitor 1

C2 GRM1885C1H101J Murata(1) 100pF ±5%, 0603 capacitor 1

C5 GRM1885C1H120J Murata(1) 12pF ±5%, 0603 capacitor 1

C6, C11, C16 Murata(1) (NP) 3

C7 GQM1875C2E4R7C Murata(1) 4.7pF ±0.25pF, 0603 capacitor 1

C10 GRM188R61C104K Murata(1) 0.1µF ±10%, 0603 capacitor 1

C13, C14 GRM1885C1H180J Murata(1) 18pF ±5%, 0603 capacitor 2

J1 TSHR-114-S-02-A-GT 3-pin header 1

L1 0805CS-471XJB Coilcraft(2) 470nH ±5%, 0805 wire-wound inductor 1

L4 0603CS-068NXJB Coilcraft(2) 68nH ±5%, 0603 wire-wound inductor 1

L5 ANTENNA LOOP (Part of PCB) PCB ANTENNA 1

R2 CRCW0603100KFKEA Vishay(3) 100k ±5%, 0603 resistor 1

R7 CRC06030000Z0EA Vishay(3) 0 ±5%, 0603 resistor 1

Y1 SA-13.5600-F-10-J-30-30-x

Hosonic

Industrial

Brazil(4)

13.560MHZ ±30ppm crystal 1

U1 MICRF113YM6 Micrel, Inc.(5) 300MHz to 450MHz +10dBm ASK

Transmitter in SOT23 1

Notes:

1. Murata Tel: www.murata.com.

2. Coilcraft.: www.coilcraft.com.

3. Vishay Tel: www.vishay.com.

4. Hosonic Industrial Brazil: www.hib.com.br

5. Micrel, Inc.: www.micrel.com.

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November 2010 18 M9999-112310

Bill of Materials (315MHz)

Item Part Number Manufacturer Description Qty.

C1 GRM21BR60J106K Murata(1) 10µF ±10%, 0805 capacitor 1

C2 GRM1885C1H101J Murata(1) 100pF ±5%, 0603 capacitor 1

C5 GRM1885C1H120J Murata(1) 10pF ±5%, 0603 capacitor 1

C6, C11, C16 Murata(1) (NP) 3

C7 GQM1875C2E4R7C Murata(1) 6.8pF ±0.25pF, 0603 capacitor 1

C10 GRM188R61C104K Murata(1) 0.1µF ±10%, 0603 capacitor 1

C13, C14 GRM1885C1H180J Murata(1) 18pF ±5%, 0603 capacitor 2

J1, J2 TSHR-114-S-02-A-GT 3-pin header 1

L1 0805CS-471XJB Coilcraft(2) 470nH ±5%, 0805 wire-wound inductor 1

L4 0603CS-R15XJB Coilcraft(2) 150nH ±5%, 0603 wire-wound inductor 1

L5 ANTENNA LOOP (Part of PCB) PCB ANTENNA 1

R2 CRCW0603100KFKEA Vishay(3) 100k ±5%, 0603 resistor 1

R7 CRC06030000Z0EA Vishay(3) 0 ±5%, 0603 resistor 1

Y1 SA-9.84375-F-10- J-30-30-x

Hosonic

Industrial

Brazil(4)

9.84375MHZ ±30ppm crystal 1

U1 MICRF113YM6 Micrel, Inc.(5) 300MHz to 450MHz +10dBm ASK

Transmitter in SOT23 1

Notes:

1. Murata Tel: www.murata.com

2. Coilcraft.: www.coilcraft.com.

3. Vishay Tel: www.vishay.com.

4. Hosonic Industrial Brazil: www.hib.com.br

5. Micrel, Inc.: www.micrel.com.

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November 2010 19 M9999-112310

PCB Layout Recommendations (50 Test Board)

Assembly Drawing

Top Layer

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November 2010 20 M9999-112310

PCB Layout Recommendations (50 Test Board)

Bottom Layer

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November 2010 21 M9999-112310

Package Information

Notes:

1. Dimensions and tolerances are in accordance with ANSI Y14.5M, 1982.

2. Package surface to be mirror finish.

3. Die is facing up for mold. Die is facing down for trim/form, that is, reverse trim/form.

4. The foot-length measuring is based on the gauge plane method.

5 Dimensions are exclusive of mold flash and gate burr.

6-Pin SOT (YM6)

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Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This

information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,

specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual

property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability

whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties

relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right

Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product

reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical impla

into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A

Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully

indemnify Micrel for any damages resulting from such use or sale.

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Micrel Inc. 的 MICRF113 规格书

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