Analog Devices Inc./Maxim Integrated 的 MAX22191 规格书

MAX22191 Parasitically Powered Digital Input
General Description
The MAX22191 is an IEC 61131-2 compliant, industrial
digital input (DI) device that translates a 24V digital industrial
input to a 2.4mA (typ) current for driving optical isolators.
Voltage thresholds and current levels in the MAX22191
are compliant with Type 1 and Type 3 inputs, while minimizing
power dissipation. The MAX22191 is also compliant with
48V inputs, with the addition of external resistors.
Operating power is derived from the input signal, eliminating
the need for an external field-side power supply. A 250ns
(max) fast response time is ideal for high-speed inputs.
Additionally, a CMOS-compatible test input is available for
safety diagnostics.
The MAX22191 features robust functionality for harsh
industrial systems and is capable of normal operation with
input signals ranging from -60V to +60V. Integrated thermal
shutdown further protects the device when VCC is present.
The MAX22191 is available in a small, 6-lead SOT23
package and operates over the -40°C to +125°C ambient
temperature range.
Applications
●Process Automation
●Industrial Automation
●Motor Controls
●Individually Isolated Inputs
●Current Sourcing Inputs
Benefits and Features
●High Integration for Flexible Circuit Designs
• 250ns (max) Response Time
• Parasitically Powered from the Field Input
• Current Sourcing Input with Optical Isolators
• Current Sinking Input with Optical Isolators
• Current Sinking Input with Logic Devices
• Test Pulse Input
●Reduced Power and Heat Dissipation
• Current Limited Input
●Robust Design
• Operates from -60V to +60V Input Voltage
• -40°C to +125°C Ambient Operating Temperature
Ordering Information appears at end of data sheet.
19-100229; Rev 0; 12/17
Click here for production status of specific part numbers.
MAX22191 Parasitically Powered Digital Input
Simplified Block Diagram
IN
REXT 2.3mA
INT
REF
VCC
OUT
MAX22191
TEST
EVALUATION KIT AVAILABLE
(All voltages referenced to GND, unless otherwise stated)
VCC ........................................................................-0.3V to +6V
IN ........................................................................... -70V to +60V
TEST .......................................................................-0.3V to +6V
OUT (3.0V ≤ VCC ≤ 5.5V) ........................ -0.3V to (VCC + 0.3V)
OUT (VCC = 0V) ....................... -0.3V to min [(VIN + 0.3V), +6V]
REXT (3.0V ≤ VCC ≤ 5.5V) ...................... -0.3V to (VCC + 0.3V)
REXT (VCC = 0V) ..................... -0.3V to min [(VIN + 0.3V), +6V]
Short-Circuit Duration
OUT to GND ..........................................................Continuous
Continuous Power Dissipation (TA = +70°C)
6L SOT23 (derate at 8.7mW/°C above +70°C) ...........696mW
Operating Temperature Range
Ambient Temperature ................................... -40°C to +125°C
Junction Temperature ..................................................+150°C
Storage Temperature Range ............................ -65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering (reflow) ............................................................+260°C
VIN = 0V to 60V, VCC = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VIN = 24V, REXT = 40.2kΩ (±1%),
and TA = +25°C. (Notes 2, 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DIGITAL INPUT (IN)
IN Functional Operating Range VIN_F -60 +60 V
IN Voltage Upper Threshold VINTHU OUT is high
VCC = 0V 10
V
3.0V ≤ VCC ≤ 5.5V
(Note 5) 10
IN Voltage Lower Threshold VINTHL OUT is low
VCC = 0V 7
V
3.0V ≤ VCC ≤ 5.5V
(Note 5) 7
IN Current Low IINL
VIN = 7V, steady
state, REXT =
40.2kΩ, VOUT = 3V
VCC = 0V 1.5 `
mA
3.0V ≤ VCC ≤ 5.5V
(Note 5) 1.5
IN Boost Current IINB VIN < VINTHU (Note 4) 4 5.5 mA
IN Current High IINH
VIN = 10V to 36V,
steady state,
REXT = 40.2kΩ,
VOUT = 0V to 3V
VCC = 0V 2.1 2.4 2.7
mA
3.0V ≤ VCC ≤ 5.5V
(Note 5) 2.1 2.75
OUTPUT (OUT)
OUT Load Voltage VOUT Load on OUT is an LED 0 3 V
OUT High Current IOUTH VOUT = 0.5V to 3V, VIN = 10V 2 2.3 mA
OUT Low Current IOUTL VIN < VINTHL, VOUT = 0V -1 +1 μA
OUT Voltage High VOH 3.0V ≤ VCC ≤ 5.5V, ILOAD = 1mA (Note 5) VCC -
0.4 V
MAX22191 Parasitically Powered Digital Input
www.maximintegrated.com Maxim Integrated
│
2
Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
(Note 1)
6L SOT23
Junction-to-Ambient Thermal Resistance (θJA)
Multilayer Board .........................................................115°C/W
Junction-to-Case Thermal Resistance (θJC)
Multilayer Board ........................................................80°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Package Thermal Characteristics
DC Electrical Characteristics
VIN = 0V to 60V, VCC = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VIN = 24V, REXT = 40.2kΩ (±1%),
and TA = +25°C. (Notes 2, 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OUT Voltage Low VOL 3.0V ≤ VCC ≤ 5.5V, ISINK = 1mA (Note 5) 0.4 V
AUXILIARY POWER SUPPLY (VCC)
Auxiliary Power Supply Range VCC (Note 6) 3.0 5.5 V
Auxiliary Power Supply Current ICC
VCC = 3.0V 270 400 μA
VCC = 5.5V 380 600
TEST INPUT
TEST Input High Threshold VTESTH
3.0V ≤ VCC ≤ 5.5V (2/3)VCC V
VCC = 0V 2.8
TEST Input Low Threshold VTESTL
3.0V ≤ VCC ≤ 5.5V VCC/3 V
VCC = 0V 1.3
TEST Input Pulldown Resistance RPD 250 kΩ
PROTECTION
Thermal Shutdown Threshold TSHDN (Note 7) 160 °C
Thermal Shutdown Hysteresis TSHDN_HYS 23 °C
ESD (All Pins) Human Body Model ±2 kV
MAX22191 Parasitically Powered Digital Input
www.maximintegrated.com Maxim Integrated
│
3
DC Electrical Characteristics (continued)
VIN = 0V to 60V, VCC = 0V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at VIN = 24V, REXT = 40.2kΩ (±1%),
and TA = +25°C. (Note 2)
Note 2: All units are production tested at TA = +25°C. Specifications over temperature are guaranteed by design and characterization.
Note 3: All voltages are referenced to ground, unless otherwise noted.
Note 4: See the Boost Current section for more information.
Note 5: Not production tested. Guaranteed by design
Note 6: VCC is an auxiliary supply input. When VCC is powered from an external 3V to 5.5V supply, the propagation delay is
reduced and the output changes from a current souce to a CMOS output. When using power from IN to power the device,
connect VCC to GND (VCC = 0V).
Note 7: Thermal shutdown protection is only enabled when VCC is present. Thermal shutdown does not occur when VCC = 0V.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
IN to OUT Low-to-High Propagation
Delay tPDLH
CL = 15pF,
Figure 1
VCC = 0V,
RL = 1.5kΩ 250
ns
VCC = 3.0V,
RL is open 200
IN to OUT High-to-Low Propagation
Delay tPDHL
CL = 15pF,
Figure 1
VCC = 0V,
RL = 1.5kΩ 250
ns
VCC = 3.0V,
RL is open 200
IN to OUT Propagation Delay Jitter CL = 15pF, RMS jitter, Figure 1 250 ps
IN to OUT Propagation
Delay Skew, Part-to-Part tSKEWP2P
CL = 15pF,
Figure 1 (Note 5)
VCC = 0V,
RL = 1.5kΩ, 195
ns
3.0V ≤ VCC ≤ 5.5V,
RL is open 75
TEST Propagation Delay VCC = 0V or 3V,
VIN = 11V
TEST low to high,
OUT high to low 1.5
μs
TEST high to low,
OUT low to high 1.8
MAX22191 Parasitically Powered Digital Input
www.maximintegrated.com Maxim Integrated
│
4
AC Electrical Characteristics
(VIN = 24V, REXT = 40.2kΩ (±1%), RL = 1.5kΩ on OUT, TA = +25°C, unless otherwise noted.)
Figure 1. Propagation Delay Test Circuit and Timing Diagram
MAX22191 Parasitically Powered Digital Input
www.maximintegrated.com Maxim Integrated
│
5
Typical Operating Characteristics
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
-60 -50 -40 -30 -20 -10 010 20 30 40 50 60
IN CURRENT (mA)
IN VOLTAGE (V)
IN CURRENT vs. VOLTAGE
(V
CC
= 0V)
toc01
T
A
= -40ºC
T
A
= +25ºC
T
A
= +125ºC
V
CC
= 0V
R
L
= 1.5kΩ
8.0
8.2
8.4
8.6
8.8
9.0
9.2
9.4
9.6
9.8
10.0
-40 -25 -10 520 35 50 65 80 95 110 125
V
INTHU
(V)
TEMPERATURE (ºC)
UPPER VOLTAGE THRESHOLD
vs. TEMPERATURE
toc04
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-60 -50 -40 -30 -20 -10 010 20 30 40 50 60
IN CURRENT (mA)
IN VOLTAGE (V)
IN CURRENT vs. VOLTAGE
(V
CC
= 3.3V)
toc02
T
A
= -40ºC
T
A
= +25ºC
T
A
= +125ºC
V
CC
= 3.3V
R
L
= 1.5kΩ
7.0
7.2
7.4
7.6
7.8
8.0
8.2
8.4
8.6
8.8
9.0
-40 -25 -10 520 35 50 65 80 95 110 125
V
INTHL
(V)
TEMPERATURE (ºC)
LOWER VOLTAGE THRESHOLD
vs. TEMPERATURE
toc05
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
012345678910 11 12 13 14 15
CURRENT (mA)
IN VOLTAGE (V)
INPUT AND OUTPUT CURRENT
vs. INPUT VOLTAGE
toc03
I
OUT
,
IN RISING
I
OUT
,
IN FALLING
I
IN
,
IN RISING
I
IN
,
IN FALLING
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
-40 -25 -10 520 35 50 65 80 95 110 125
IN CURRENT (mA)
TEMPERATURE (ºC)
IN CURRENT vs. TEMPERATURE
toc06
V
IN
= +30V
C
L
IN
REXT VCC
OUT
MAX22191
R
L
GND
TEST
V
IN
I
OUT
0V
0mA
V
INTHU
90%
10%
t
PDLH
t
PDHL
V
INTHL
+
-
(VIN = 24V, REXT = 40.2kΩ (±1%), RL = 1.5kΩ on OUT, TA = +25°C, unless otherwise noted.)
Maxim Integrated
│
6
www.maximintegrated.com
MAX22191 Parasitically Powered Digital Input
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
36 37 38 39 40 41 42 43 44 45
IN CURRENT (mA)
REXT (Ω)
IN AND OUT CURRENT
vs. REXT RESISTANCE
toc08
VIN = 24V
OUT CURRENT
IN CURRENT
Typical Operating Characteristics (continued)
-5
-4
-3
-2
-1
0
1
2
3
4
5
-40 -25 -10 520 35 50 65 80 95 110 125
IN CURRENT (µA)
TEMPERATURE (ºC)
IN CURRENT vs. TEMPERATURE
toc07
V
IN
= -30V
0
25
50
75
100
125
150
175
200
225
250
-40 -25 -10 520 35 50 65 80 95 110 125
PROPAGATION DELAY (ns)
TEMPERATURE (ºC)
PROPAGATION DELAY vs. TEMPERATURE
(V
CC
= 0V)
toc09
IN PULSED FROM 0V-24V
t
PDLH
t
PDHL
0
25
50
75
100
125
150
175
200
225
250
10 15 20 25 30 35 40 45 50 55 60
PROPAGATION DELAY (ns)
IN VOLTAGE (V)
PROPAGATION DELAY vs. IN VOLTAGE
(V
CC
= 0V)
toc11
t
PDLH
t
PDHL
0
25
50
75
100
125
150
175
200
225
250
-40 -25 -10 520 35 50 65 80 95 110 125
PROPAGATION DELAY (ns)
TEMPERATURE (ºC)
PROPAGATION DELAY vs. TEMPERATURE
(V
CC
= 3.3V)
toc10
IN PULSED FROM 0V-24V
NO LOAD ON OUT
t
PDLH
t
PDHL
0
25
50
75
100
125
150
175
200
225
250
10 15 20 25 30 35 40 45 50 55 60
PROPAGATION DELAY (ns)
IN VOLTAGE (V)
PROPAGATION DELAY vs. IN VOLTAGE
(V
CC
= 3.3V)
toc12
NO LOAD ON OUT
t
PDLH
t
PDHL
PIN NAME FUNCTION
1 IN Digital Input. Connect IN directly to the input signal. Connect suitable TVS between IN and
GND for surge protection.
2 GND Ground
3 REXT Reference Current Resistor Connection. Connect an external 40.2kΩ (±1%) resistor
between REXT and GND.
4 TEST Test Pulse Input. When IN is high, toggle TEST from low-to-high to verify that OUT toggles
from high-to-low.
5 VCC
Auxiliary Supply Input. For a parasitically powered circuit, connect VCC to GND. To power
the device from a local power supply, connect VCC to a 3.0V to 5.5V source. Bypass VCC to
GND with a 1μF capacitor when powered from a local supply.
6 OUT Output Signal. Connect OUT to the anode of an optical LED, or to the input of a digital circuit.
MAX22191 Parasitically Powered Digital Input
www.maximintegrated.com Maxim Integrated
│
7
Pin Configurations
MAX22191
SOT23-6
TOP VIEW
GND
REXT
1
IN
2
3TEST
6OUT
5VCC
+
4
Pin Description
Table 1. TEST Mode Functionality
Detailed Description
The MAX22191 features an integrated current source, voltage
comparator, and current steering network to create an input
load compliant with IEC 61131-2 Type 1 and Type 3 24VDC
inputs, while generating a drive current for opto-isolators
that turn-on/-off in compliance with the voltage thresholds
of the standard. The addition of external voltage-dropping
resistors also allows the MAX22191 to operate with 48VDC
inputs (see the Typical Operating Circuits).
Power-Up/Power-Down
As the input voltage (VIN) rises, the MAX22191 transitions
through three phases of operation:
Phase 1: VIN is rising but is inadequate to fully power the
current source or voltage comparator. Any current that
does flow into the MAX22191 is diverted to GND through
the internal current steering switches, bypassing the optical
isolator.
Phase 2: VIN continues to increase to a level that is
adequate to power the comparator and the current
source, but the input voltage threshold has not been
reached. The output of the internal current source
continues to be diverted to GND.
Phase 3: VIN exceeds the comparator threshold (VINTHU),
and the current is switched to the OUT pin. If connected to
an external optical isolator, the current passes through the
LED and returns to the negative field input.
As VIN drops, the phases are reversed. The internal
current source is switched from OUT to GND when VIN
falls below the lower voltage threshold (VINTHL).
Boost Current
To allow for a faster response time, the MAX22191
includes a boost current, IINB, during IN power up. The
boost current is used to set and stabilize the output
current while the voltage on IN is rising (VIN < VINTHU).
When VIN > VINTHU, and the output current is enabled,
the input current is the sum of both the output current and
boost current (IINB + IINH) for a short period before the
output current is steady at 2.3mA (typ).
Integrated Diagnostic (TEST) Input
The MAX22191 features an integrated TEST input for
easy diagnostic checks. When IN is high, toggle TEST
from low-to-high to verify that OUT toggles high-to-low.
See Table 1. The current on IN is not affected during this
diagnostic test.
When IN is low, TEST has no effect on OUT, it remains low.
Applications Information
Powering the MAX22191 With the VCC Pin
The MAX22191 can be powered parasitically from a
digital input or from an external power supply.
To power the device parastically, connect VCC to GND.
In this configuration, power is derived from the signal on
the IN pin.
To power the device from a local power supply, connect
VCC to a source between 3.0V and 5.5V. When VCC
is powered, the output (OUT) changes from a current
source to a CMOS output and the propagation delay from
IN to OUT is reduced.
Layout Considerations
Place the 40.2kΩ (±1%) REXT resistor as close to the
pin as possible. Too much distance between the resistor
and the IC can create unwanted input current overshoots/
undershoots.
Table 1. TEST Mode Functionality
IN TEST OUT
< VINTHL Low Low
< VINTHL High Low
≥ VINTHU Low High
≥ VINTHU High Low
MAX22191 Parasitically Powered Digital Input
www.maximintegrated.com Maxim Integrated
│
8
MAX22191 Parasitically Powered Digital Input
www.maximintegrated.com Maxim Integrated
│
9
Typical Operating Circuits
IN
REXT 2.3mA
INT
REF
VCC
OUT
MAX22191
MICROCONTROLLER
V
DD
GND
GPI
24V
PROXIMITY
SENSOR/
SWITCH
TEST
GND
40.2kΩ
SMAJ33CA
24V CURRENT SINKING INPUT
IN
REXT 2.3mA
INT
REF
VCC
OUT
MAX22191
MICROCONTROLLER
V
DD
GND
GPI
24V
PROXIMITY
SENSOR/
SWITCH
TEST
GND
40.2kΩ
SMAJ33CA
24V CURRENT SOURCING INPUT
aww $5
MAX22191 Parasitically Powered Digital Input
www.maximintegrated.com Maxim Integrated
│
10
Typical Operating Circuits (continued)
IN
REXT 2.3mA
INT
REF
VCC
OUT
MAX22191
MICROCONTROLLER 1
V
DD
GND
GPI
PROXIMITY
SENSOR/
SWITCH
TEST
IN
REXT 2.3mA
INT
REF
VCC
OUT
MAX22191
24V
TEST
GPO
GPI
GND
GND
MICROCONTROLLER 2
V
DD
GND
GPI
GPO
GPI
REDUNDANT INPUT WITH TEST
SIGNALS AND CMOS OUTPUTS
SMAJ33CA
40.2kΩ
40.2kΩ
IN
REXT 2.3mA
INT
REF
VCC
OUT
MAX22191
PROXIMITY
SENSOR/
SWITCH
MICROCONTROLLER
V
DD
GND
GPI
GND
TEST
48V
1.5kΩ
MELF 1.2kΩ
SMAJ58CA 40.2kΩ
48V CURRENT SINKING INPUT
PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
6-SOT23 U6-1 21-0058 90-0175
PART TEMP RANGE PIN-PACKAGE
MAX22191AUT+ -40°C to +125°C 6 SOT23
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
MAX22191 Parasitically Powered Digital Input
www.maximintegrated.com Maxim Integrated
│
11
Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Ordering InformationChip Information
PROCESS: BiCMOS
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 12/17 Initial release —
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2017 Maxim Integrated Products, Inc.
│
12
MAX22191 Parasitically Powered Digital Input
Revision History
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.