AD5174

www.DataSheet4U.com Single-Channel, 1024-Position, Digital Rheostat with SPI Interface and 50-TP Memory AD5174 FEATURES Single-channel, 1024-position resolution 10 kΩ nominal resistance 50-times programmable (50-TP) wiper memory Rheostat mode temperature coefficient: 35 ppm/°C 2.7 V to 5.5 V single-supply operation ±2.5 V to ±2.75 V dual-supply operation for ac or bipolar operations SPI-compatible interface Wiper setting and memory readback Power on refreshed from memory Resistor tolerance stored in memory Thin LFCSP 10-lead, 3 mm × 3 mm× 0.8 mm package Compact MSOP, 10-lead, 3 mm × 4.9 mm × 1.1 mm package FUNCTIONAL BLOCK DIAGRAM VDD POWER-ON RESET AD5174 SCLK SYNC DIN SDO SPI SERIAL INTERFACE 10 RDAC REGISTER A W 50-TP MEMORY BLOCK APPLICATIONS Mechanical rheostat replacements Op-amp: variable gain control Instrumentation: gain, offset adjustment Programmable voltage-to-current conversions Programmable filters, delays, time constants Programmable power supply Sensor calibration VSS EXT_CAP GND Figure 1. GENERAL DESCRIPTION The AD5174 is a single-channel, 1024-position digital rheostat that combines industry leading variable resistor performance with nonvolatile memory (NVM) in a compact package. This device supports both dual-supply operation at ±2.5 V to ±2.75 V and single-supply operation at 2.7 V to 5.5 V and offers 50-times programmable (50-TP) memory. The AD5174 device wiper settings are controllable through the SPI digital interface. Unlimited adjustmen...