Datasheet AD74413R (Analog Devices)

Quad-Channel, Software Configurable Input and Output Data Sheet AD74413R FEATURES GENERAL DESCRIPTION Quad-channel software configurable input/output circuit
The AD74413R is a quad-channel software configurable
Screw terminals tolerant to ±40 V dc
input/output solution for building and process control
Line protectors to block power from the screw terminals to
applications. The AD74413R contains functionality for analog
supplies
output, analog input, digital input, resistance temperature
User configurable modes
detector (RTD), and thermocouple measurements integrated
Voltage input
into a single chip solution with a serial peripheral interface (SPI).
Current input
The device features a 16-bit, Σ-Δ analog-to-digital converter
Voltage output
(ADC) and four configurable, 13-bit digital-to-analog converters
Current output
(DACs) to provide four configurable input/output channels and a
Digital input
suite of diagnostic functions.
RTD measurement Internal 16-bit, Σ-∆ ADC with optional 50 Hz and 60 Hz
There are several modes related to the AD74413R. These modes
rejection
are voltage output, current output, voltage input, externally
13-bit monotonic DACs
powered current input, loop powered current input, external RTD
Charge pump for true zero voltage output
measurement, digital input logic, and loop powered digital input.
HART-compatible
The AD74413R contains a high accuracy 2.5 V internal
Internal temperature sensor, ±5°C accuracy
reference to drive the DACs and the ADC.
On-chip diagnostics including open circuit and short-circuit COMPANION PRODUCTS detection SPI-compatible External Reference: ADR4525 Temperature range: −40°C to +105°C PRODUCT HIGHLIGHTS 64-lead LFCSP
1. Quad-Channel, Software Configurable Channels.
APPLICATIONS
2. Built In Diagnostics and Alert Features.
Process control 3.
Robust Architecture.
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Document Outline Features Applications General Description Companion Products Product Highlights Revision History Functional Block Diagram Specifications Voltage Output Current Output Voltage Input Current Input Externally Powered and Current Input Externally Powered with HART Current Input Loop Powered Resistance Measurement Digital Input Logic Digital Input Loop Powered ADC Specifications General Specifications Timing Characteristics SPI Timing Specifications Timing Diagrams Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Voltage Output Current Output Digital Input Resistance Measurement Reference ADC Supplies Theory of Operation Robust Architecture Serial Interface DAC Architecture ADC Overview Reference Reference Noise Charge Pump Power-On State of the AD74413R Device Functions High Impedance Interpreting ADC Data Voltage Output Mode Voltage Output Short-Circuit Protection Interpreting ADC Data Current Output Mode Current Output Open Circuit Detection Interpreting ADC Data HART Compatibility Voltage Input Mode Selectable 200 kΩ to GND Interpreting ADC Data Thermocouple Measurement Current Input, Externally Powered Mode Short-Circuit Protection Interpreting ADC Data Current Input, Externally Powered with HART Compatibility Mode Current Input, Loop Powered Mode Short-Circuit Protection Interpreting ADC Data Current Input, Loop Powered with HART Compatibility Mode Resistance Measurement (External 2-Wire RTD) Interpreting ADC Data Digital Input Logic Interpreting ADC Data Digital Input Threshold Setting Digital Input Current Sink Debounce Function Debounce Mode 0 (Default) Debounce Mode 1 Digital Input Inverter Digital Input Counter Digital Input, Loop Powered Mode Interpreting ADC Data Getting Started Using Channel Functions Switching Channel Functions ADC Functionality ADC Conversion Rates ADC_RDYb Functionality ADC Output Data Format ADC Noise Diagnostics DACs LDAC Function Clear Code Function Digital Linear Slew Rate Control HART Compliant Slew Driving Inductive Loads Reset Function Thermal Alert and Thermal Reset Faults and Alerts Channel Faults Power Supply Monitors GPO_x Pins SPI Interface and Diagnostics SPI CRC SPI Interface SCLK Count Feature Readback Mode Streaming Mode Auto Readback Board Design and Layout Considerations Applications Information Register Map NOP Register Function Setup Register per Channel ADC Configuration Register per Channel Digital Input Configuration Register per Channel GPO Parallel Data Register GPO Configuration Register per Channel Output Configuration Register per Channel DAC Code Register per Channel DAC Clear Code Register per Channel DAC Active Code Register per Channel Digital Input Threshold Register ADC Conversion Control Register Diagnostics Select Register Digital Output Level Register ADC Conversion Results Register per Channel Diagnostic Results Registers per Diagnostic Channel Alert Status Register Live Status Register Alert Mask Register Debounced DIN Count Register per Channel Readback Select Register Thermal Reset Enable Register Command Register Scratch or Spare Register Silicon Revision Register Outline Dimensions Ordering Guide