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AD5271

Analog Devices
Part Number AD5271
Manufacturer Analog Devices
Description SPI Interface and 50-TP Memory Digital Rheostat
Published Oct 6, 2013
Detailed Description Data Sheet AD5270/AD5271 1024-/256-Position, 1% Resistor Tolerance Error, SPI Interface and 50-TP Memory Digital Rheos...
Datasheet PDF File AD5271 PDF File

AD5271
AD5271

Overview
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/AD5271 device wiper settings are controllable through the SPI digital interface.
Unlimited adjustments are allowed before programming the resistance value into the 50-TP memory.
The AD5270/AD5271 do not require any external voltage supply to facilitate fuse blow and there are 50 opportunities for permanent programming.
During 50-TP activation, a permanent blow fuse command freezes the resistance position (analogous to placing epoxy on a mechanical trimmer).
The AD5270/AD5271 are available in a 3...


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