Datasheet > AD5254BRU50

AD5254BRU50

更新时间： 2024-11-03 22:23:23

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
28页	1160K
描述
Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers

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AD5254BRU50 数据手册

Quad 64-/256-Position I²C Nonvolatile

Memory Digital Potentiometers

AD5253/AD5254

FUNCTIONAL BLOCK DIAGRAM

FEATURES

AD5253: Quad 64-position resolution

AD5254: Quad 256-position resolution

1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ

RDAC EEMEM

RDAC0

RDAC1

RDAC2

RDAC0

REGIS-

TER

EEMEM

POWER-ON

REFRESH

TOL

DGND

Nonvolatile memory¹stores wiper settings with write

protection

DATA

Power-on refreshed to EEMEM settings in 300 µs typ

EEMEM rewrite time = 540 µs typ

SCL

SDA

RDAC1

REGIS-

TER

I C

SERIAL

INTERFACE

CONTROL

Resistance tolerance stored in nonvolatile memory

12 extra bytes in EEMEM for user-defined information

I²C® compatible serial interface

AD0

AD1

COMMAND

DECODE LOGIC

RDAC2

REGIS-

TER

Direct read/write accesses of RDAC²and EEMEM registers

Predefined linear increment/decrement commands

Predefined 6 dB step change commands

Synchronous or asynchronous quad channel update

Wiper setting readback

ADDRESS

DECODE LOGIC

CONTROL LOGIC

RDAC3

REGIS-

TER

AD5253/AD5254

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 +85°C

Figure 1.

The AD5253/AD5254 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.

APPLICATIONS

Mechanical potentiometer replacement

Low resolution DAC replacement

RGB LED backlight control

White LED brightness adjustment

RF base station power amp bias control

Programmable gain and offset control

Programmable attenuators

Programmable voltage-to-current conversion

Programmable power supply

The AD5253/AD5254 provide additional increment, decrement,

+6 dB step change, and –6 dB step change in synchronous or

asynchronous channel update modes. The increment and

decrement functions allow stepwise linear adjustments, while

6 dB step changes are equivalent to doubling or halving the

RDAC wiper setting. These functions are useful for steep-slope

nonlinear adjustment applications such as white LED brightness

and audio volume control.

Programmable filters

Sensor calibrations

GENERAL DESCRIPTION

The AD5253/AD5254 are quad 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 AD5253/AD5254 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.

The AD5253/AD5254 are available in TSSOP-20 packages in

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

guaranteed to operate over the –40°C to +85°C extended

industrial temperature range.

The AD5253/AD5254’s versatile programmability allows multi-

ple modes of operation, including read/write accesses 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 informa-

tion, such as memory data for other components, look-up table,

or system identification information.

¹The terms nonvolatile memory and EEMEM are used interchangeably.

²The terms digital potentiometer and RDAC are used interchangeably.

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, 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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AD5254BRU50 替代型号

型号	品牌	替代类型	描述	数据表
AD5254BRUZ50-RL7	ADI	类似代替	Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5254BRUZ50	ADI	类似代替	Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers

与AD5254BRU50相关器件

型号	品牌	获取价格	描述	数据表
AD5254BRU50-RL7	ADI	获取价格	Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5254BRUZ1	ADI	获取价格	Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5254BRUZ10	ADI	获取价格	Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5254BRUZ100	ADI	获取价格	Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5254BRUZ100-RL7	ADI	获取价格	Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5254BRUZ10-RL7	ADI	获取价格	Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5254BRUZ1-RL7	ADI	获取价格	Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5254BRUZ50	ADI	获取价格	Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5254BRUZ50-RL7	ADI	获取价格	Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers
AD5254EVAL	ADI	获取价格	Quad 64-/256-Position I2C Nonvolatile Memory Digital Potentiometers

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