Datasheet > AD5235BRUZ25

AD5235BRUZ25

更新时间： 2024-11-25 14:47:35

品牌	Logo	应用领域
亚德诺 - ADI		光电二极管转换器电阻器
页数	文件大小	规格书
28页	557K
描述
Nonvolatile Memory, Dual 1024-Position Digital Potentiometer

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AD5235BRUZ25 数据手册

Nonvolatile Memory, Dual

1024-Position Digital Potentiometer

AD5235

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Dual-channel, 1024-position resolution

25 kΩ, 250 kΩ nominal resistance

Low temperature coefficient: 35 ppm/°C

Nonvolatile memory stores wiper settings

Permanent memory write protection

Wiper setting readback

AD5235

ADDR

DECODE

RDAC1

CLK

SDI

SERIAL

INTERFACE

RDAC1

SDO

EEMEM1

POWER-ON

RESET

Resistance tolerance stored in EEMEM

Predefined linear increment/decrement instructions

Predefined 6 dB/step log taper increment/decrement

instructions

RDAC2

EEMEM

CONTROL

RDY

RDAC2

EEMEM2

SPI® compatible serial interface

3 V to 5 V single supply or 2.5 V dual supply

26 bytes extra nonvolatile memory for user-defined

information

26 BYTES

USER EEMEM

RTOL

GND

100-year typical data retention, T_A= 55°C

Power-on refreshed with EEMEM settings

Figure 1.

In the scratchpad programming mode, a specific setting can be

programmed directly to the RDAC²register, which sets the

resistance between Terminals W–A and W–B. This setting can

be stored into the EEMEM and is restored automatically to the

RDAC register during system power-on.

APPLICATIONS

DWDM laser diode driver, optical supervisory systems

Mechanical potentiometer replacement

Instrumentation: gain, offset adjustment

Programmable voltage to current conversion

Programmable filters, delays, time constants

Programmable power supply

The EEMEM content can be restored dynamically or through

external

strobing, and a

function protects EEMEM

Low resolution DAC replacement

Sensor calibration

contents. To simplify the programming, the independent or

simultaneous linear-step increment or decrement commands

can be used to move the RDAC wiper up or down, one step at a

time. For logarithmic 6 dB changes in wiper setting, the left or

right bit shift command can be used to double or half the

RDAC wiper setting.

GENERAL DESCRIPTION

The AD5235 is a dual-channel, nonvolatile memory,¹digitally

controlled potentiometer²with 1024-step resolution. The device

performs the same electronic adjustment function as a

mechanical potentiometer with enhanced resolution, solid state

reliability, and superior low temperature coefficient perform-

ance. The AD5235’s versatile programming via an SPI

compatible serial interface allows 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.

AD5235 patterned resistance tolerance is stored in the EEMEM.

The actual end-to-end resistance can, therefore, be known by

the host processor in readback mode. The host can execute the

appropriate resistance step through a software routine that

simplifies open-loop applications as well as precision calibration

and tolerance matching applications.

The AD5235 is available in a thin TSSOP-16 package. The part

is guaranteed to operate over the extended industrial tempera-

ture range of −40°C to +85°C.

¹The terms nonvolatile memory and EEMEM are used interchangeably.

²The terms digital potentiometer and RDAC are used interchangeably.

³R_ABtolerance.

Rev. B

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

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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AD5235BRUZ25 替代型号

型号	品牌	替代类型	描述	数据表
AD5235BRU25	ADI	功能相似	Nonvolatile Memory, Dual 1024 Position Digital Potentiometers

与AD5235BRUZ25相关器件

型号	品牌	获取价格	描述	数据表
AD5235BRUZ250	ADI	获取价格	Nonvolatile Memory, Dual 1024-Position Digital Potentiometer
AD5235BRUZ250	ROCHESTER	获取价格	DUAL 250K DIGITAL POTENTIOMETER, 3-WIRE SERIAL CONTROL INTERFACE, 1024 POSITIONS, PDSO16,
AD5235-EP	ADI	获取价格	Nonvolatile Memory, Dual 1024-Position Digital Potentiometer
AD524	ADI	获取价格	Precision Instrumentation Amplifier
AD524_07	ADI	获取价格	Precision Instrumentation Amplifier
AD524_16	ADI	获取价格	Precision Instrumentation Amplifier
AD5240	ADI	获取价格	FAST, COMPLETE 12-BIT A/D CONVERTERS
AD5240BD	ETC	获取价格	Analog-to-Digital Converter， 12-Bit
AD5240BD/883B	ETC	获取价格	Analog-to-Digital Converter， 12-Bit
AD5240KD	ADI	获取价格	FAST, COMPLETE 12-BIT A/D CONVERTERS

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