Datasheet > AD5251BRUZ50

AD5251BRUZ50

更新时间： 2024-11-04 12:28:35

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
28页	575K
描述
Dual 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers

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AD5251BRUZ50 数据手册

Dual 64-/256-Position I²C Nonvolatile

Memory Digital Potentiometers

Data Sheet

AD5251/AD5252

FEATURES

FUNCTIONAL BLOCK DIAGRAM

AD5251: Dual 64-position resolution

AD5252: Dual 256-position resolution

1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ

Nonvolatile memory¹stores wiper setting w/write protection

Power-on refreshed with EEMEM settings in 300 µs typ

EEMEM rewrite time = 540 µs typ

Resistance tolerance stored in nonvolatile memory

12 extra bytes in EEMEM for user-defined information

I²C-compatible serial interface

Direct read/write access of RDAC²and EEMEM registers

Predefined linear increment/decrement commands

Predefined 6 dB step change commands

Synchronous or asynchronous dual-channel update

Wiper setting readback

RDAC EEMEM

RDAC1

REGIS-

TER

EEMEM

POWER-ON

REFRESH

RAB

TOL

DGND

DATA

RDAC3

SCL

SDA

RDAC3

REGIS-

TER

I C

SERIAL

INTERFACE

CONTROL

AD0

AD1

COMMAND

DECODE LOGIC

ADDRESS

DECODE LOGIC

AD5251/

AD5252

POWER-

ON RESET

CONTROL LOGIC

Figure 1.

4 MHz bandwidth—1 kΩ version

Single supply 2.7 V to 5.5 V

Dual supply 2.25 V to 2.75 V

2 slave address decoding bits allow operation of 4 devices

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

Operating temperature: –40°C to +105°C

The AD5251/AD5252 allow the host I²C controllers to write

any of the 64-/256-step wiper settings in the RDAC registers

and store them in the EEMEM. Once the settings are stored,

they are restored automatically to the RDAC registers at system

power-on; the settings can also be restored dynamically.

The AD5251/AD5252 provide additional increment,

decrement, +6 dB step change, and –6 dB step change in

synchronous or asynchronous channel update mode. The

increment and decrement functions allow stepwise linear

adjustments, with a 6 dB step change equivalent to doubling

or halving the RDAC wiper setting. These functions are useful

for steep-slope, nonlinear adjustments, such as white LED

brightness and audio volume control.

APPLICATIONS

Mechanical potentiometer replacement

General-purpose DAC replacement

LCD panel V_COMadjustment

White LED brightness adjustment

RF base station power amp bias control

Programmable gain and offset control

Programmable voltage-to-current conversion

Programmable power supply

The AD5251/AD5252 have a patented resistance-tolerance

storing function that allows the user to access the EEMEM and

obtain the absolute end-to-end resistance values of the RDACs

for precision applications.

Sensor calibrations

GENERAL DESCRIPTION

The AD5251/AD5252 are dual-channel, I²C®, nonvolatile mem-

ory, digitally controlled potentiometers with 64/256 positions,

respectively. These devices perform the same electronic adjust-

ment functions as mechanical potentiometers, trimmers, and

variable resistors. The parts’ versatile programmability allows

multiple modes of operation, including read/write access in the

RDAC and EEMEM registers, increment/decrement of resistance,

resistance changes in 6 dB scales, wiper setting readback, and

extra EEMEM for storing user-defined information, such as

memory data for other components, look-up table, or system

identification information.

The AD5251/AD5252 are available in TSSOP-14 packages in

1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ options. All parts are

guaranteed to operate over the –40°C to +105°C extended

industrial temperature range.

¹The terms nonvolatile memory and EEMEM are used interchangeably.

²The terms digital potentiometer and RDAC are used interchangeably.

Rev. D

Document Feedback

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

rightsof 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.

Technical Support

www.analog.com

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AD5251BRUZ50 替代型号

型号	品牌	替代类型	描述	数据表
AD5251BRU50-RL7	ADI	类似代替	Dual 64-and 256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5251BRU50	ADI	功能相似	Dual 64-and 256-Position I2C Nonvolatile Memory Digital Potentiometers

与AD5251BRUZ50相关器件

型号	品牌	获取价格	描述	数据表
AD5251EVAL	ADI	获取价格	Dual 64-and 256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5252	ADI	获取价格	Dual 64-and 256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5252_15	ADI	获取价格	Dual 64-/256-Position IC Nonvolatile Memory Digital Potentiometers
AD5252BRU1	ADI	获取价格	Dual 64-and 256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5252BRU10	ADI	获取价格	Dual 64-and 256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5252BRU100	ADI	获取价格	Dual 64-and 256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5252BRU100-RL7	ADI	获取价格	Dual 64-and 256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5252BRU10-RL7	ADI	获取价格	Dual 64-and 256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5252BRU1-RL7	ADI	获取价格	Dual 64-and 256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5252BRU50	ADI	获取价格	Dual 64-and 256-Position I2C Nonvolatile Memory Digital Potentiometers

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