AD8402ARU10

更新时间： 2024-11-06 22:39:03

品牌	Logo	应用领域
亚德诺 - ADI		转换器电位器数字电位计电阻器光电二极管
页数	文件大小	规格书
20页	497K
描述
1-/2-/4-Channel Digital Potentiometers

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AD8402ARU10 数据手册

1-/2-/4-Channel

Digital Potentiometers

AD8400/AD8402/AD8403

FEATURES

FUNCTIONAL BLOCK DIAGRAM

256 Position

Replaces 1, 2 or 4 Potentiometers

1 k⍀, 10 k⍀, 50 k⍀, 100 k⍀

Power Shut Down—Less than 5 ␮A

3-Wire SPI Compatible Serial Data Input

10 MHz Update Data Loading Rate

+2.7 V to +5.5 V Single-Supply Operation

Midscale Preset

RDAC1

8-BIT

LATCH

AD8403

SHDN

AGND1

DGND

DAC

SELECT

RDAC2

8-BIT

LATCH

A1, A0

SHDN

AGND2

APPLICATIONS

RDAC3

Mechanical Potentiometer Replacement

Programmable Filters, Delays, Time Constants

Volume Control, Panning

Line Impedance Matching

Power Supply Adjustment

10-BIT

SERIAL

LATCH

8-BIT

LATCH

SHDN

AGND3

SDI

CLK

RDAC4

8-BIT

LATCH

GENERAL DESCRIPTION

SHDN

AGND4

The AD8400/AD8402/AD8403 provide a single, dual or quad

channel, 256 position digitally controlled variable resistor (VR)

device. These devices perform the same electronic adjustment

function as a potentiometer or variable resistor. The AD8400

contains a single variable resistor in the compact SO-8 package.

The AD8402 contains two independent variable resistors in

space saving SO-14 surface mount package. The AD8403 con-

tains four independent variable resistors in 24-lead PDIP, SOIC

and TSSOP packages. Each part contains a fixed resistor with a

wiper contact that taps the fixed resistor value at a point deter-

mined by a digital code loaded into the controlling serial input

of the fixed resistor varies linearly with respect to the digital

code transferred into the VR latch. Each variable resistor 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 1 kΩ, 10 kΩ, 50 kΩ or 100 kΩ

has a ±1% channel-to-channel matching tolerance with a nominal

temperature coefficient of 500 ppm/°C. A unique switching cir-

cuit minimizes the high glitch inherent in traditional switched

resistor designs avoiding any make-before-break or break-before-

make operation.

SDO

The reset (RS) pin forces the wiper to the midscale position by

loading 80_Hinto the VR latch. The SHDN pin forces the resis-

tor to an end-to-end open circuit condition on the A terminal

and shorts the wiper to the B terminal, achieving a microwatt

power shutdown state. When SHDN is returned to logic high,

the previous latch settings put the wiper in the same resistance

setting prior to shutdown. The digital interface is still active in

shutdown so that code changes can be made which will produce

new wiper positions when the device is taken out of shutdown.

The AD8400 is available in both the SO-8 surface mount and

the 8-lead plastic DIP package.

The AD8402 is available in both surface mount (SO-14) and

the 14-lead plastic DIP package, while the AD8403 is available

in a narrow body 24-lead plastic DIP and the 24-lead surface

mount package. The AD8402/AD8403 are also offered in the

1.1 mm thin TSSOP-14/TSSOP-24 package for PCMCIA ap-

plications. All parts are guaranteed to operate over the extended

industrial temperature range of –40°C to +85°C.

Each VR has its own VR latch that holds its programmed

resistance value. These VR latches are updated from an SPI

compatible serial-to-parallel shift register that is loaded from a

standard 3-wire serial-input digital interface. Ten data bits make

up the data word clocked into the serial input register. The data

word is decoded where the first two bits determine the address

of the VR latch to be loaded, the last eight bits are data. A serial

data output pin at the opposite end of the serial register allows

simple daisy-chaining in multiple VR applications without addi-

tional external decoding logic.

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703

World Wide Web Site: http://www.analog.com

12 3 4 5 6 7...20

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AD8402ARU10 替代型号

型号	品牌	替代类型	描述	数据表
AD8402ARUZ10	ADI	完全替代	1-/2-/4-Channel Digital Potentiometers
AD8402ARZ10	ADI	完全替代	1-/2-/4-Channel Digital Potentiometers
AD8402ARUZ100	ADI	类似代替	1-/2-/4-Channel Digital Potentiometers

与AD8402ARU10相关器件

型号	品牌	获取价格	描述	数据表
AD8402ARU100	ADI	获取价格	1-/2-/4-Channel Digital Potentiometers
AD8402ARU100-REEL	ADI	获取价格	1-/2-/4-Channel Digital Potentiometers
AD8402ARU10-REEL	ADI	获取价格	1-/2-/4-Channel Digital Potentiometers
AD8402ARU1-REEL	ADI	获取价格	IC DUAL 1K DIGITAL POTENTIOMETER, 3-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDSO14,
AD8402ARU50	ADI	获取价格	1-/2-/4-Channel Digital Potentiometers
AD8402ARU50-REEL	ADI	获取价格	1-/2-/4-Channel Digital Potentiometers
AD8402ARUZ1	ADI	获取价格	1-/2-/4-Channel Digital Potentiometers
AD8402ARUZ10	ADI	获取价格	1-/2-/4-Channel Digital Potentiometers
AD8402ARUZ100	ADI	获取价格	1-/2-/4-Channel Digital Potentiometers
AD8402ARUZ100-REEL	ADI	获取价格	1-/2-/4-Channel Digital Potentiometers

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