Datasheet > AD5231

AD5231

更新时间： 2024-11-20 21:55:23

品牌	Logo	应用领域
亚德诺 - ADI		电位器存储
页数	文件大小	规格书
24页	421K
描述
Nonvolatile Memory, 1024-Position Digital Potentiometers

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AD5231 数据手册

Nonvolatile Memory,

1024-Position Digital Potentiometers

AD5231^*

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Nonvolatile Memory¹Preset Maintains Wiper Settings

1024-Position Resolution

AD5231

Full Monotonic Operation

RDAC

ADDR

RDAC

CLK

SDI

10 kꢀ, 50 kꢀ, and 100 kꢀ Terminal Resistance

Permanent Memory Write-Protection

Wiper Settings Read Back

DECODE

SDI

SERIAL

INTERFACE

EEMEM1

GND

Linear Increment/Decrement

Log Taper Increment/Decrement

SDO

Push Button Increment/Decrement Compatible

SPI Compatible Serial Interface with Readback Function

3 V to 5 V Single Supply or ꢁ2.5 V Dual Supply

28 Bytes User Nonvolatile Memory for Constant Storage

100 Year Typical Data Retention T_A= 55ꢂC

DIGITAL

OUTPUT

BUFFER

EEMEM

CONTROL

RDY

EEMEM2

28 BYTES

USER EEMEM

APPLICATIONS

Mechanical Potentiometer Replacement

Instrumentation: Gain, Offset Adjustment

Programmable Voltage to Current Conversion

Programmable Filters, Delays, Time Constants

Line Impedance Matching

100

Power Supply Adjustment

Low Resolution DAC Replacement

GENERAL DESCRIPTION

The AD5231 provides nonvolatile memory digitally controlled

potentiometers²with 1024-position resolution. These devices

perform the same electronic adjustment function as a mechanical

potentiometer. The AD5231’s versatile programming via a stan-

dard 3-wire serial interface allows 16 modes of operation and

adjustment, including scratch pad programming, memory stor-

ing and retrieving, increment/decrement, log taper adjustment,

wiper setting read back, and extra user-defined EEMEM.

256

512

768

1023

CODE – Decimal

In the scratch pad programming mode, a specific setting can be

programmed directly to the RDAC²register, which sets the resis-

tance at terminals W-A and W-B. The RDAC register can also

be loaded with a value previously stored in the EEMEM¹regis-

ter. The value in the EEMEM can be changed or protected.

When changes are made to the RDAC register, the value of the

new setting can be saved into the EEMEM. Thereafter, such value

will be transferred automatically to the RDAC register during

system power ON. It is enabled by the internal preset strobe.

EEMEM can also be retrieved through direct programming and

external preset pin control.

Figure 1. R_WA(D) and R_WB(D) vs. Decimal Code

Other operations include linear step increment and decrement

commands such that the setting in the RDAC register can be

moved UP or DOWN, one step at a time. For logarithmic changes

in wiper setting, a left/right bit shift command adjusts the level

in 6 dB steps.

The AD5231 is available in thin TSSOP-16 package. All parts

are guaranteed to operate over the extended industrial tempera-

ture range of –40°C to +85°C.

NOTES

¹The terms Nonvolatile Memory and EEMEM are used interchangeably.

²The terms Digital Potentiometer and RDAC are used interchangeably.

*Patent pending

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

www.analog.com

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与AD5231相关器件

型号	品牌	获取价格	描述	数据表
AD5231BRU10	ADI	获取价格	Nonvolatile Memory, 1024-Position Digital Potentiometers
AD5231BRU100	ADI	获取价格	Nonvolatile Memory, 1024-Position Digital Potentiometers
AD5231BRU100-REEL7	ADI	获取价格	Nonvolatile Memory, 1024-Position Digital Potentiometers
AD5231BRU100-RL7	ADI	获取价格	100K DIGITAL POTENTIOMETER, 3-WIRE SERIAL CONTROL INTERFACE, 1024 POSITIONS, PDSO16, MO-15
AD5231BRU10-REEL7	ADI	获取价格	Nonvolatile Memory, 1024-Position Digital Potentiometers
AD5231BRU50	ADI	获取价格	Nonvolatile Memory, 1024-Position Digital Potentiometers
AD5231BRU50-REEL7	ADI	获取价格	Nonvolatile Memory, 1024-Position Digital Potentiometers
AD5231BRUZ10	ADI	获取价格	Nonvolatile Memory, 1024-Position Digital Potentiometer
AD5231BRUZ100	ADI	获取价格	Nonvolatile Memory, 1024-Position Digital Potentiometer
AD5231BRUZ100-RL7	ADI	获取价格	Nonvolatile Memory, 1024-Position Digital Potentiometer

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