AD8522AN

更新时间： 2024-11-24 22:50:03

品牌	Logo	应用领域
亚德诺 - ADI		转换器数模转换器光电二极管信息通信管理
页数	文件大小	规格书
8页	243K
描述
+5 Volt, Serial Input, Dual 12-Bit DAC

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中文翻译

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数据手册

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AD8522AN 数据手册

+5 Volt, Serial Input,

Dual 12-Bit DAC

AD8522

FEATURES

FUNCTIO NAL BLO CK D IAGRAM

Com plete Dual 12-Bit DAC

No External Com ponents

+5 V Single-Supply Operation ؎10%

4.095 V Full Scale (1 m V/ LSB)

Buffered Voltage Outputs

Low Pow er: 5 m W/ DAC

AMP

CLK

LATCH

DAC A

OUTA

DAC A

CLK

SDI

(DATA)

BANDGAP

REFERENCE

REF

BUF

Space Saving 1.5 m m Height SO-14 Package

SHIFT

REF

APPLICATIONS

Digitally Controlled Calibration

Servo Controls

Process Control Equipm ent

Com puter Peripherals

Portable Instrum entation

Cellular Base Stations Voltage Adjustm ent

REF

BUF

DAC B

SDO

DAC B

AD8522

AGND

AMP

OUTB

LDA

LDB

CONTROL

LOGIC

DGND

MSB

GENERAL D ESCRIP TIO N

inputs. A serial data output allows the user to easily daisy-chain

multiple devices in conjunction with a chip select input. A reset

RS input sets the outputs to zero scale or midscale, as deter-

mined by the input MSB.

T he AD8522 is a complete dual 12-bit, single-supply, voltage

output DAC in a 14-pin DIP, or SO-14 surface mount package.

Fabricated in a CBCMOS process, features include a serial digi-

tal interface, onboard reference, and buffered voltage output.

Ideal for +5 V-only systems, this monolithic device offers low

cost and ease of use, and requires no external components to

realize the full performance of the device.

T he output 4.095 V full scale is laser trimmed to maintain accu-

racy over the operating temperature range of the device, and

gives the user an easy-to-use one-millivolt-per-bit resolution. A

2.5 V reference output is also available externally for other data

acquisition circuitry, and for ratiometric applications. T he out-

put buffers are capable of driving ±5 mA.

T he serial digital interface allows interfacing directly to numer-

ous microcontroller ports, with a simple high speed, three-wire

data, clock, and load strobe format. T he 16-bit serial word con-

tains the 12-bit data word and DAC select address, which is de-

coded internally or can be decoded externally using LDA, LDB

T he AD8522 is available in the 14-pin plastic DIP and low pro-

file 1.5 mm SOIC-14 packages.

0.6

P ACKAGE TYP ES AVAILABLE

= +4.5V

= –55°C, +25°C, +85°C, +125°C

0.4

0.2

+25°C

–55°C

–0.2

–0.4

–0.6

–0.8

–1.0

PDIP-14

+85°C

SO-14

+125°C

1024

2048

3072

4096

DIGITAL INPUT CODE – Decimal

Figure 1. Linearity Error vs. Digital Code & Tem perature

REV. A

Inform ation furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assum ed by Analog Devices for its

use, nor for any infringem ents of patents or other rights of third parties

which m ay result from its use. No license is granted by im plication or

otherwise under any patent or patent rights of Analog Devices.

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

Tel: 617/ 329-4700

Fax: 617/ 326-8703

12 3 4 5 6 7 8

中文翻译

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