AD5270

Data Sheet AD5270/AD5271 1024-/256-Position, 1% Resistor Tolerance Error, SPI Interface and 50-TP Memory Digital Rheostat FEATURES FUNCTIONAL BLOCK DIAGRAM ► Single-channel, 1024-/256-position resolution ► 20 kΩ, 50 kΩ, 100 kΩ nominal resistance ► Maximum ±1% nominal resistor tolerance error ► 50-times programmable (50-TP) wiper memory ► Rheostat mode temperature coefficient: 5 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 opera- tions ► SPI-compatible interface ► Wiper setting readback ► Power on refreshed from 50-TP 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 Figure 1. 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 GENERAL DESCRIPTION The AD5270/AD52711 are single-channel, 1024-/256-position digital rheostats that combine industry leading variable resistor performance with nonvolatile memory (NVM) in a compact package. The AD5270/AD5271 ensure less than 1% end-to-end resistor tolerance error and offer 50-times programmable (50-TP) memory. The guaranteed industry leading low resistor tolerance error feature simplifies open-loop applications as well as precision calibration and tolerance matching applications. The AD5270/...