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AD5292BRUZ-100 Fiches technique(PDF) 1 Page - Analog Devices |
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AD5292BRUZ-100 Fiches technique(HTML) 1 Page - Analog Devices |
1 / 32 page 256-/1024-Position, Digital Potentiometers with Maximum ±1% R-Tolerance Error and 20-TP Memory AD5291/AD5292 Rev. D Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2009–2010 Analog Devices, Inc. All rights reserved. FEATURES Single-channel, 256-/1024-position resolution 20 kΩ, 50 kΩ, and 100 kΩ nominal resistance Maximum ±1% nominal resistor tolerance error (resistor performance mode) 20-times programmable wiper memory Rheostat mode temperature coefficient: 35 ppm/°C Voltage divider temperature coefficient: 5 ppm/°C +9 V to +33 V single-supply operation ±9 V to ±16.5 V dual-supply operation SPI-compatible serial interface Wiper setting readback Power-on refreshed from 20-TP memory APPLICATIONS Mechanical potentiometer replacement Instrumentation: gain and offset adjustment Programmable voltage-to-current conversion Programmable filters, delays, and time constants Programmable power supply Low resolution DAC replacement Sensor calibration FUNCTIONAL BLOCK DIAGRAM A W B RDAC REGISTER DATA SERIAL INTERFACE SYNC SCLK DIN POWER-ON RESET OTP MEMORY BLOCK VLOGIC SDO EXT_CAP VDD VSS GND AD5291/ AD5292 RESET RDY Figure 1. GENERAL DESCRIPTION The AD5291 and AD5292 are single-channel, 256-/1024- position digital potentiometers1 that combine industry leading variable resistor performance with nonvolatile memory (NVM) in a compact package. These devices are capable of operating across a wide voltage range, supporting both dual supply operation at ±10.5 V to ±16.5 V and single supply operation at +21 V to +33 V, while ensuring less than 1% end-to-end resistor tolerance error and offering 20-time programmable (20-TP) memory. The guaranteed industry leading low resistor tolerance error feature simplifies open-loop applications as well as precision calibration and tolerance matching applications. 1 The terms digital potentiometer and RDAC are used interchangeably. The AD5291 and AD5292 device wiper settings are controllable through the SPI digital interface. Unlimited adjustments are allowed before programming the resistance value into the 20-TP memory. The AD5291 and AD5292 do not require any external voltage supply to facilitate fuse blow, and there are 20 opportunities for permanent programming. During 20-TP activation, a permanent blow fuse command freezes the wiper position (analogous to placing epoxy on a mechanical trimmer). The AD5291 and AD5292 are available in a compact 14-lead TSSOP package. The part is guaranteed to operate over the extended industrial temperature range of −40°C to +105°C. |
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