AD5235BRUZ250

更新时间： 2024-11-21 12:52:07

品牌	Logo	应用领域
亚德诺 - ADI		转换器数字电位计电阻器光电二极管
页数	文件大小	规格书
32页	788K
描述
Nonvolatile Memory, Dual 1024-Position Digital Potentiometer

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AD5235BRUZ250 数据手册

Nonvolatile Memory, Dual

1024-Position Digital Potentiometer

AD5235

Data Sheet

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Dual-channel, 1024-position resolution

25 kΩ, 250 kΩ nominal resistance

Maximum 8% nominal resistor tolerance error

Low temperature coefficient: 35 ppm/°C

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

SPI-compatible serial interface

Nonvolatile memory stores wiper settings

Power-on refreshed with EEMEM settings

Permanent memory write protection

Resistance tolerance stored in EEMEM

26 bytes extra nonvolatile memory for user-defined

information

AD5235

ADDR

DECODE

RDAC1

CLK

SDI

SERIAL

INTERFACE

RDAC1

RDAC2

SDO

EEMEM1

POWER-ON

RESET

RDAC2

EEMEM

CONTROL

RDY

EEMEM2

26 BYTES

USER EEMEM

RTOL*

GND

1M programming cycles

100-year typical data retention

*RAB TOLERANCE

APPLICATIONS

Figure 1.

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

In the scratchpad programming mode, a specific setting can

be programmed directly to the RDAC²register, which sets the

resistance between Terminal W and Terminal A and Terminal W

and Terminal B. This setting can be stored into the EEMEM

and is restored automatically to the RDAC register during

system power-on.

Low resolution DAC replacement

Sensor calibration

The EEMEM content can be restored dynamically or through

external

strobing, and a

function protects EEMEM

GENERAL DESCRIPTION

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 the wiper setting, the

left or right bit shift command can be used to double or halve the

RDAC wiper setting.

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

controlled potentiometer²with 1024-step resolution, offering

guaranteed maximum low resistor tolerance error of 8%.

The device performs the same electronic adjustment function

as a mechanical potentiometer with enhanced resolution, solid

state reliability, and superior low temperature coefficient per-

formance. The versatile programming of the AD5235 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 EEMEM¹for user-

defined information such as memory data for other components,

look-up table, or system identification information.

The 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, 16-lead TSSOP package.

The part is guaranteed to operate over the extended industrial

temperature 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.

Rev. F

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 fromits 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 andregisteredtrademarks 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

www.analog.com

12 3 4 5 6 7...32

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AD5235BRUZ250 替代型号

型号	品牌	替代类型	描述	数据表
AD5235BRU250-RL7	ADI	完全替代	IC DUAL 250K DIGITAL POTENTIOMETER, 3-WIRE SERIAL CONTROL INTERFACE, 1024 POSITIONS, PDSO1
AD5235BRU250	ADI	完全替代	Nonvolatile Memory, Dual 1024 Position Digital Potentiometers

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