EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX22000 Industrial Configurable Analog I/O General Description Benefits and Features The MAX22000 is an industrial-grade configurable analog Accurate input/output device that can be configured on-the-fly in AOVM Mode: software as a voltage input or output, or current input or 0.02%FSR Accuracy, Room Temp output. Additional inputs are available to measure other 0.1%FSR Accuracy, 50C Temp Variation analog signals. 5ppm/C Internal Reference The device offers an 18-bit DAC with fast settling time as Flexible well as a 24-bit delta-sigma ADC. The ADC and DAC can 6 Analog Inputs/1 Analog Output Using Software individually choose between an internal or an external ref- Configurable Voltage and Current erence. Two Auxiliary ADC Inputs for Cold Junction Measurements The MAX22000 supports the ADC with a low-noise pro- RTD Input Mode in 2, 3, or 4-Wire Configurations grammable gain amplifier (PGA), with high-voltage and Thermocouple Input Mode low-voltage input ranges to support RTD and thermocou- 12.5V Input/Output Voltage Range ple measurements. Additional auxiliary inputs are provid- 25mA or 2.5mA Output Current Range ed to measure cold junction temperatures on-board. 25V, 2.5V, 500mV, 250mV, and 125mV PGA The MAX22000 communicates through a high speed Input Voltage Ranges 20MHz SPI bus for all configuration and management in- +24V Field Supply for Current Loop formation as well as for conversion results. An optional Optional External Reference for ADC and/or DAC 8-bit CRC enhances the reliability of the SPI interface, pro- Six GPIOs tecting against all 8-bit bursts as well as all double-bit er- 20MHz SPI Interface rors. Robust The MAX22000 operates from 2.7V to 3.6V analog and 36V Protection on All Analog I/O Ports digital supplies and up to 24V high-voltage supplies. The Overcurrrent Protection device is available in a 64-pin LGA package and operates Thermal Shutdown over the -40C to +125C industrial temperature range. Undervoltage Interrupt on All High Voltage Supplies CRC Detection Applications Open Detection on All Analog Inputs Distributed Control Systems 2kV HBM Protection on All Pins Process Control -40C to +125C Operating Temperature Range Programmable Logic Controllers (PLC) Small 9mm x 9.5mm 64-Pin LGA Package Programmable Automation Controllers (PAC) Ordering Information and Application Block Diagram appear at end of datasheet. 19-100526 Rev 2 6/20MAX22000 Industrial Configurable Analog I/O Functional Block Diagram DVDD AVDD BYP DAC REF DAC REF DAC EXT HART IN FB HVDD HVDDO OSCILLATOR LDO AOP + AON - INPUT DAC AI1 REGISTER LDAC CSA AI2 AGND DAC AGND DAC AI3 NR 2.5V REFERENCE REF OUT CS DIGITAL AI4 INTERFACE SCLK DIGITAL DELTA-SIGMA ADC FILTER SDI AI5 SDO INT PGA RST AI6 RDY LDO SYNC AUX1 CLK AUX2 GPIO CTRL DGND AGND BYP ADC REF ADC REF ADC EXT GPIO 5:0 HVSS HVSSO 19-100526 www.maximintegrated.com Maxim Integrated 2 - + + - + - - +