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AD5292BRUZ-20-RL7 Scheda tecnica(PDF) 1 Page - Analog Devices |
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AD5292BRUZ-20-RL7 Scheda tecnica(HTML) 1 Page - Analog Devices |
1 / 28 page 256-/1024-Position, DigiPOT+ Potentiometers with Maximum ±1% R-Tolerance Error and 20-TP Memory AD5291/AD5292 Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother 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 Analog Devices, Inc. All rights reserved. FEATURES Single-channel, 256-/1024-position resolution 20 kΩ nominal resistance Calibrated ±1% nominal resistor tolerance (resistor performance mode) 20-time programmable (20-TP) set-and-forget resistance setting allows multiple time permanent programming 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/AD5292, members of the Analog Devices, Inc., DigiPOT+ family of potentiometers, 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 (R-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/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/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/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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