MAX22191AUT+T

EVALUATION KIT AVAILABLE Click here to ask about production status of specific part numbers. MAX22191 Ultra-Low-Power, Parasitically Powered Digital Input General Description The MAX22191 is an IEC 61131-2 compliant, industrial digital input (DI) device. The MAX22191 translates a 24V industrial switching signal to a 3.3V/5V CMOS-level output, or to a 2.3mA (typ) current output for driving an optocoupler and/or LED. 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. Benefits and Features ●● High Integration for Flexible Circuit Designs • Interfaces to Optocouplers or Digital Isolators • Capable of Driving an Optocoupler and Status LED • Operational as Sink or Source Digital Input • Ultra-High Speed: 250ns (max) Propagation Delay • Test Pulse Diagnostic • Allows for Small Footprint TVS Surge Protection ●● Reduced Power and Heat Dissipation • Parasitically Powered from the Field Input • Accurate ±15% Input-Current Limiting • 100µA (typ) Quiescent Current with Optocoupler • 96% (typ) Current-Transfer Efficiency to Optocoupler ●● 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. 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 Simplified Block Diagram IN MAX22191 TEST REXT 2.3mA INT REF GND 19-100229; Rev 1; 10/20 OUT VCC MAX22191 Ultra-Low-Power, Parasitically Powered Digital Input Absolute Maximum Ratings (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 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. Package Information PACKAGE TYPE: 6 SOT23 Package Code U6-1 Outline Number 21-0058 Land Pattern Number 90-0175 THERMAL RESISTANCE, FOUR-LAYER BOARD Junction to Ambient (θJA) 115°C/W Junction to Case (θJC) 80°C/W 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. 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. www.maximintegrated.com Maxim Integrated │  2 MAX22191 Ultra-Low-Power, Parasitically Powered Digital Input 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 1, 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS +60 V DIGITAL INPUT (IN) IN Functional Operating Range IN Voltage Upper Threshold IN Voltage Lower Threshold VIN_F VINTHU VINTHL -60 OUT is high VCC = 0V 10 3.0V ≤ VCC ≤ 5.5V (Note 3) 10 VCC = 0V 7 OUT is low 3.0V ≤ VCC ≤ 5.5V (Note 3) 7 VCC = 0V IN Current Low IINL VIN = 7V, steady state, REXT = 40.2kΩ, VOUT = 3V IN Boost Current IINB VIN < VINTHU (Note 4) IN Current High IINH VIN = 10V to 36V, steady state, REXT = 40.2kΩ 3.0V ≤ VCC ≤ 5.5V (Note 3) VCC = 0V VOUT = 0V to 5.5V 3.0V ≤ VCC ≤ 5.5V (Note 3) V 1.5 ` 1.5 2.1 V 4 5.5 2.4 2.7 mA mA mA 2.1 2.75 OUTPUT (OUT) OUT High Current IOUTH VOUT = 0.5V to 5.5V, VIN = 10V, VCC = 0V 2 OUT Low Current IOUTL VIN < VINTHL, VOUT = 0V -1 OUT Voltage High VOH 3.0V ≤ VCC ≤ 5.5V, ILOAD = 1mA (Note 3) OUT Voltage Low VOL 3.0V ≤ VCC ≤ 5.5V, ISINK = 1mA (Note 3) 2.3 mA +1 VCC 0.4 μA V 0.4 V 5.5 V AUXILIARY POWER SUPPLY (V CC) Auxiliary Power Supply Range VCC Auxiliary Power Supply Current ICC (Note 5) 3.0 VCC = 3.0V 270 400 VCC = 5.5V 380 600 μA TEST INPUT TEST Input High Threshold VTESTH TEST Input Low Threshold VTESTL TEST Input Pulldown Resistance 3.0V ≤ VCC ≤ 5.5V (2/3)VCC VCC = 0V 3.0V ≤ VCC ≤ 5.5V VCC = 0V RPD 2.8 VCC/3 V V 1.3 250 kΩ 160 °C PROTECTION Thermal Shutdown Threshold TSHDN Thermal Shutdown Hysteresis TSHDN_HYS ESD (All Pins) www.maximintegrated.com (Note 6) Human Body Model 23 °C ±2 kV Maxim Integrated │  3 MAX22191 Ultra-Low-Power, Parasitically Powered Digital Input AC 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. (Note 1) PARAMETER SYMBOL IN to OUT Low-to-High Propagation Delay IN to OUT High-to-Low Propagation Delay CONDITIONS tPDLH CL = 15pF, Figure 1 tPDHL CL = 15pF, Figure 1 MIN 250 VCC = 3.0V, RL is open 200 VCC = 0V, RL = 1.5kΩ 250 VCC = 3.0V, RL is open 200 CL = 15pF, RMS jitter, Figure 1 IN to OUT Propagation Delay Skew, Part-to-Part CL = 15pF, Figure 1 (Note 5) VCC = 0V or 3V, VIN = 11V TEST Propagation Delay MAX VCC = 0V, RL = 1.5kΩ IN to OUT Propagation Delay Jitter tSKEWP2P TYP UNITS ns ns 250 ps VCC = 0V, RL = 1.5kΩ, 195 3.0V ≤ VCC ≤ 5.5V, RL is open 75 ns TEST low to high, OUT high to low 1.5 TEST high to low, OUT low to high 1.8 μs Note 1: All units are production tested at TA = +25°C. Specifications over temperature are guaranteed by design and characterization. Note 2: All voltages are referenced to ground, unless otherwise noted. Note 3: 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 4: See the Boost Current section for more information. Note 5: Not production tested. Guaranteed by design Note 6: Thermal shutdown protection is only enabled when VCC is present. Thermal shutdown does not occur when VCC = 0V. IN REXT OUT MAX22191 RL VCC + GND VINTHU VIN TEST - CL VINTHL 0V tPDLH IOUT tPDHL 90% 10% 0mA Figure 1. Propagation Delay Test Circuit and Timing Diagram www.maximintegrated.com Maxim Integrated │  4 MAX22191 Ultra-Low-Power, Parasitically Powered Digital Input Typical Operating Characteristics (VIN = 24V, REXT = 40.2kΩ (±1%), RL = 1.5kΩ on OUT, TA = +25°C, unless otherwise noted.) IN CURRENT vs. VOLTAGE (VCC = 0V) 5.0 4.5 3.5 VCC = 0V RL = 1.5kΩ TA = +25ºC 4.0 TA = +125ºC 2.5 2.0 1.5 1.0 2.0 3.5 TA = +125ºC 1.5 TA = -40ºC 1.0 TA = -40ºC 0.5 0.5 0.0 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 2.30 IOUT 2.25 9.8 8.8 96 9.6 8.6 94 9.4 8.4 92 9.2 8.2 88 2.15 86 84 2.05 0 1 2 3 4 5 82 6 80 9.0 8.8 3.0 7.6 7.4 8.2 7.2 5 4 VIN = +30V 2.8 3 2.7 2 IN CURRENT (µA) IN CURRENT (mA) 2.9 IN CURRENT vs. TEMPERATUREtoc07 2.6 2.5 2.4 2.3 www.maximintegrated.com -5 LOWER VOLTAGE THRESHOLD vs. TEMPERATURE toc06 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (ºC) IN AND OUT CURRENT vs. REXT RESISTANCE 4.0 VIN = -30V IN CURRENT 2.5 2.0 OUT CURRENT 1.5 1.0 VIN = 24V VCC = 0V 0.5 0.0 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (ºC) toc09 3.5 3.0 -2 -4 TEMPERATURE (ºC) toc08 0 2.1 -40 -25 -10 5 20 35 50 65 80 95 110 125 REVERSE VOLTAGE INPUT CURRENT vs. TEMPERATURE -1 -3 2.0 7.0 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (ºC) 1 2.2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 IN VOLTAGE (V) 7.8 8.4 VOUT (V) VCC = 0V 8.0 8.6 8.0 IOUT, IN FALLING 9.0 10.0 2.20 VIN = 11V VCC = 0V TEST = 0V UPPER VOLTAGE THRESHOLD vs. TEMPERATURE toc05 98 90 2.10 0.0 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 VINTHL (V) IIN, IOUT (mA) IOUT/IIN 2.35 IOUT, IN RISING 1.5 0.5 IN CURRENT (mA) IIN 2.40 2.0 100 VINTHU (V) 2.45 IOUT/IIN (%) 2.50 2.5 IN VOLTAGE (V) IN, OUT CURRENT vs. OUT VOLTAGE toc04 IIN, IN RISING IIN, IN FALLING 3.0 1.0 TA = +25ºC IN VOLTAGE (V) 2.00 4.0 CURRENT (mA) 3.0 INPUT AND OUTPUT CURRENT vs. INPUT VOLTAGE toc03 4.5 2.5 3.5 0.0 toc02 VCC = 3.3V RL = 1.5kΩ 3.0 IN CURRENT (mA) IN CURRENT (mA) toc01 IN CURRENT vs. VOLTAGE (VCC = 3.3V) 36 37 38 39 40 41 42 43 44 45 REXT (kΩ) Maxim Integrated │  5 MAX22191 Ultra-Low-Power, Parasitically Powered Digital Input Typical Operating Characteristics (continued) (VIN = 24V, REXT = 40.2kΩ (±1%), RL = 1.5kΩ on OUT, TA = +25°C, unless otherwise noted.) PROPAGATION DELAY (ns) 225 250 IN PULSED FROM 0V TO 24V 225 200 tPDLH 175 150 125 100 tPDHL 75 50 PROPAGATION DELAY (ns) 250 PROPAGATION DELAY vs. TEMPERATURE (VCC = 0V) toc10 25 0 200 150 125 100 tPDHL 50 25 0 -40 -25 -10 5 20 35 50 65 80 95 110 125 PROPAGATION DELAY vs. IN VOLTAGE (VCC = 0V) toc12 250 225 200 200 tPDLH 175 150 125 100 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (ºC) tPDHL 75 50 PROPAGATION DELAY (ns) PROPAGATION DELAY (ns) tPDLH 75 225 PROPAGATION DELAY vs. IN VOLTAGE (VCC = 3.3V) toc13 NO LOAD ON OUT 175 150 125 tPDLH tPDHL 100 75 50 25 25 0 IN PULSED FROM 0V TO 24V NO LOAD ON OUT 175 TEMPERATURE (ºC) 250 PROPAGATION DELAY vs. TEMPERATURE (VCC = 3.3V) toc11 0 10 15 20 25 30 35 40 45 50 55 60 IN VOLTAGE (V) www.maximintegrated.com 10 15 20 25 30 35 40 45 50 55 60 IN VOLTAGE (V) Maxim Integrated │  6 MAX22191 Ultra-Low-Power, Parasitically Powered Digital Input Pin Configurations TOP VIEW IN 1 GND 2 REXT 3 + MAX22191 6 OUT 5 VCC 4 TEST SOT23-6 Pin Description PIN NAME FUNCTION Digital Input. Connect IN directly to the input signal. Connect suitable TVS between IN and GND for surge protection. 1 IN 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. www.maximintegrated.com Maxim Integrated │  7 MAX22191 Ultra-Low-Power, Parasitically Powered Digital Input Detailed Description Boost Current Power-Up/Power-Down Integrated Diagnostic (TEST) Input 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 optoisolators that turn-on/-off in compliance with the voltage thresholds of the standard. The addition of external voltagedropping resistors also allows the MAX22191 to operate with 48VDC inputs (see the Typical Operating Circuits). 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. 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). 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. Table 1. TEST Mode Functionality IN TEST OUT < VINTHL Low Low < VINTHL High Low ≥ VINTHU Low High ≥ VINTHU High Low 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). www.maximintegrated.com Maxim Integrated │  8 MAX22191 Ultra-Low-Power, Parasitically Powered Digital Input 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. Connecting a Status/Indicator LED The MAX22191 output (OUT) is capable of driving an external status/indicator LED, as required in the IEC 61131-2 standard, when the device is powered. Figure 2 is an example of a current sinking configuration with a status/ indicator LED in the output line. When the input voltage is above the voltage upper threshold (VIN > VINTHU), the status LED is ON. When the input voltage is below the input lower threshold (VIN < VINTHL), the status LED is OFF. 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. EMI Protection The MAX22191 must be protected against surge and ESD. Connect a bidirectional TVS between IN and GND that limits the the peak absolute input voltage to under 60V. Example TVS’ are SMAJ33A, SPT02-236, PDFN3-32. VDD REXT SMAJ33CA MAX22191 VCC TEST 40.2kΩ 24V OUT IN GPI GND MICROCONTROLLER PROXIMITY SENSOR/ SWITCH GND Figure 2. Current Sinking Configuration with Status Indicator LED www.maximintegrated.com Maxim Integrated │  9 MAX22191 Ultra-Low-Power, Parasitically Powered Digital Input Typical Operating Circuits 24V CURRENT SINKING INPUT IN 2.3mA REXT 24V SMAJ33CA 40.2kΩ OUT VCC TEST INT REF GPI GND GND 24V CURRENT SOURCING INPUT SMAJ33CA PROXIMITY SENSOR/ SWITCH www.maximintegrated.com 40.2kΩ OUT 2.3mA REXT 24V VDD MAX22191 VCC TEST INT REF GND GPI MICROCONTROLLER IN MICROCONTROLLER PROXIMITY SENSOR/ SWITCH VDD MAX22191 GND Maxim Integrated │  10 MAX22191 Ultra-Low-Power, Parasitically Powered Digital Input Typical Operating Circuits (continued) 48V CURRENT SINKING INPUT 1.5kΩ MELF 1.2kΩ IN VDD MAX22191 OUT 48V SMAJ58CA 40.2kΩ VCC 2.3mA REXT TEST INT REF GPI GND GND REDUNDANT INPUT WITH TEST SIGNALS AND CMOS OUTPUTS IN VDD VCC MAX22191 TEST 40.2kΩ GPI 2.3mA REXT SMAJ33CA OUT INT REF GPO GPI MICROCONTROLLER 1 PROXIMITY SENSOR/ SWITCH MICROCONTROLLER PROXIMITY SENSOR/ SWITCH GND GND 24V VDD MAX22191 TEST INT REF GPO GPI GND www.maximintegrated.com GPI 2.3mA REXT 40.2kΩ OUT MICROCONTROLLER 2 IN VCC GND Maxim Integrated │  11 MAX22191 Ultra-Low-Power, Parasitically Powered Digital Input Ordering Information 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. Chip Information PROCESS: BiCMOS www.maximintegrated.com Maxim Integrated │  12 MAX22191 Ultra-Low-Power, Parasitically Powered Digital Input Revision History REVISION NUMBER REVISION DATE 0 12/17 Initial release 10/20 Updated the General Description, Benefits and Features. Simplified Block Diagram, DC Electrical Characteristics, and Typical Operating Circuits sections, and TOC03, TOC07 and TOC08; added new TOC04 and renumbered subsequent TOCs in the Typical Operating Characteristcs; added the Connecting a Status/Indicator LED and EMI Protection sections, and new Figure 2 1 PAGES CHANGED DESCRIPTION — 1‒2, 5‒6 8‒9 For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html. 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. © 2020 Maxim Integrated Products, Inc. │  13