Datasheet > AD5255BRU25

AD5255BRU25

更新时间： 2024-11-30 21:57:27

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
20页	824K
描述
3-Channel Digital Potentiometer with Nonvolatile Memory

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AD5255BRU25 数据手册

3-Channel Digital Potentiometer with

Nonvolatile Memory

AD5255

FEATURES

FUNCTIONAL BLOCK DIAGRAM

3 channels:

Dual 512-position

Single 128-position

256 BYTES

USER

EEPROM

RDAC0

32 BYTES

RDAC

EEPROM

GND

25 kΩ or 250 kΩ full-scale resistance

Low temperature coefficient:

Potentiometer divider 15 ppm/°C

Rheostat mode 35 ppm/°C

Nonvolatile memory retains wiper settings

Permanent memory write protection

Linear increment/decrement

6 dB increment/decrement

I²C-compatible serial interface

2.7 V to 5.5 V single-supply operation

2.25 V to 2.75 V dual-supply operation

Power-on reset time

9 BIT

SCL

SDA

RDAC1

DATA

CONTROL

I C

SERIAL

INTERFACE

A0_RDAC

A1_RDAC

A0_E

9 BIT

COMMAND

DECODE

LOGIC

A1_E

RDAC2

POWER-ON

RESET

ADDRESS

DECODE

LOGIC

7 BIT

DECODE

LOGIC

Figure 1.

256 bytes general-purpose user EEPROM

11 bytes RDAC user EEPROM

GBIC and SFP compliant EEPROM

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

APPLICATIONS

Mechanical potentiometer replacement

RGB LED backlight control

White LED brightness adjustment

Programmable gain and offset control

Programmable filters

GENERAL DESCRIPTION

Additional features of the AD5255 include preprogrammed

linear and logarithmic increment/decrement wiper changing.

The actual resistor tolerances are stored in EEPROM so that the

actual end-to-end resistance is known, which is valuable for

calibration in precision applications.

The AD5255 provides dual 512-position and a single

128-position digitally controlled variable resistors¹(VR) in a

TSSOP package. This device performs the same electronic

adjustment function as a potentiometer, trimmer, or variable

resistor. Each VR offers a completely programmable value of

resistance between the A terminal and the wiper or the B

terminal and the wiper. The fixed A-to-B terminal resistance of

25 kΩ or 250 kΩ has a 1% channel-to-channel matching

tolerance and a nominal temperature coefficient of 35 ppm/°C.

The AD5255 is available in a 24-lead TSSOP package. All parts

are guaranteed to operate over the extended industrial tempera-

ture range of −40°C to +85°C.

¹The terms programmable resistor, variable resistor, RDAC, and digital

potentiometer are used interchangeably.

Wiper position programming, EEPROM²reading, and EEPROM

writing is conducted via the standard 2-wire I²C interface. Pre-

vious/default wiper position settings can be stored in memory,

and refreshed upon system power-up.

²The terms nonvolatile memory, EEMEM, and EEPROM 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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AD5255BRU25 替代型号

型号	品牌	替代类型	描述	数据表
AD5255BRU25-RL7	ADI	完全替代	3-Channel Digital Potentiometer with Nonvolatile Memory

与AD5255BRU25相关器件

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AD5255BRU250	ADI	获取价格	3-Channel Digital Potentiometer with Nonvolatile Memory
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AD5258BRMZ100	ADI	获取价格	Nonvolatile, I2C-Compatible 64-Position, Digital Potentiometer
AD5258BRMZ1001	ADI	获取价格	Nonvolatile, I2C-Compatible 64-Position, Digital Potentiometer
AD5258BRMZ100-R7	ADI	获取价格	Nonvolatile, I2C-Compatible 64-Position, Digital Potentiometer
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