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AD5231BRUZ10-REEL7 датащи(PDF) 1 Page - Analog Devices |
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AD5231BRUZ10-REEL7 датащи(HTML) 1 Page - Analog Devices |
1 / 28 page Nonvolatile Memory, 1024-Position Digital Potentiometer Data Sheet AD5231 Rev. D Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother 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 ©2001–2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES 1024-position resolution Nonvolatile memory maintains wiper setting Power-on refresh with EEMEM setting EEMEM restore time: 140 µs typ Full monotonic operation 10 kΩ, 50 kΩ, and 100 kΩ terminal resistance Permanent memory write protection Wiper setting readback Predefined linear increment/decrement instructions Predefined ±6 dB/step log taper increment/decrement instructions SPI®-compatible serial interface 3 V to 5 V single-supply or ±2.5 V dual-supply operation 28 bytes extra nonvolatile memory for user-defined data 100-year typical data retention, TA = 55°C APPLICATIONS Mechanical potentiometer replacement Instrumentation: gain, offset adjustment Programmable voltage to current conversion Programmable filters, delays, time constants Programmable power supply Low resolution DAC replacement Sensor calibration FUNCTIONAL BLOCK DIAGRAM EEMEM(0) EEMEM(1) AD5231 RDAC CLK SDI GND SDO RDY SDO VDD VSS A W B O1 O2 SDI 2 PR WP CS ADDR DECODE RDAC REGISTER DIGITAL REGISTER SERIAL INTERFACE EEMEM CONTROL 28 BYTES USER EEMEM DIGITAL OUTOUT BUFFER Figure 1. CODE (Decimal) 100 75 0 0 1023 256 512 768 50 25 RWB RWA Figure 2. RWA (D) and RWB (D) vs. Decimal Code GENERAL DESCRIPTION The AD5231 is a nonvolatile memory1, digitally controlled potentiometer2 with 1024-step resolution. The device performs the same electronic adjustment function as a mechanical potentiometer with enhanced resolution, solid state reliability, and remote controllability. The AD5231 has versatile programming that uses a standard 3-wire serial interface for 16 modes of operation and adjustment, including scratchpad programming, memory storing and restoring, increment/decrement, ±6 dB/step log taper adjustment, wiper setting readback, and extra EEMEM for user-defined information, such as memory data for other components, look-up table, or system identification information. In scratchpad programming mode, a specific setting can be programmed directly to the RDAC register that sets the resistance between Terminals W–A and Terminals W–B. This setting can be stored into the EEMEM and is transferred automatically to the RDAC register during system power-on. The EEMEM content can be restored dynamically or through external PR strobing, and a WP function protects EEMEM contents. To simplify the programming, the linear-step increment or decrement commands can be used to move the RDAC wiper up or down, one step at a time. The ±6 dB step commands can be used to double or half the RDAC wiper setting. The AD5231 is available in a 16-lead TSSOP. The part is guaranteed to operate over the extended industrial temperature range of −40°C to +85°C. 1 The terms nonvolatile memory and EEMEM are used interchangeably. 2 The terms digital potentiometer and RDAC are used interchangeably. |
Аналогичный номер детали - AD5231BRUZ10-REEL7 |
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Аналогичное описание - AD5231BRUZ10-REEL7 |
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