Datasheet > LTC1448

LTC1448

更新时间： 2024-11-19 22:57:35

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
12页	245K
描述
Dual 12-Bit Rail-to-Rail Micropower DAC

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中文翻译

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LTC1448 数据手册

LTC1448

Dual 12-Bit Rail-to-Rail

Micropower DAC

DESCRIPTION

FEATURES

■

SO-8 Package

The LTC^®1448 is a dual rail-to-rail voltage output, 12-bit

digital-to-analog converter (DAC). It includes rail-to-rail

output buffer amplifiers and an easy-to-use 3-wire serial

interface.Itisavailablein8-pinSOandPDIPpackagesand

provides the smallest footprint of any dual 12-bit DAC.

■

12-Bit Resolution

■

Buffered True Rail-to-Rail Voltage Output

■

External Reference Input Can Be Tied to V_CC

■

Output Swings from 0V to V_REF

3V and 5V Supply Operation

■

The LTC1448 has an external reference input pin (REF)

and its outputs swing from 0V to REF. The REF input can

betiedtoV_CCprovidingrail-to-railoperationfromsupplies

of2.7Vto5.5V.(Fordeviceswithinternalreferenceseethe

LTC1446 data sheet.) The LTC1448 dissipates 2.5mW

from a 5V supply.

■

Schmitt Trigger on Clock Input Allows Direct

Optocoupler Interface

■

Power-On Reset Clears DACs to 0V

■

3-Wire Serial Interface

■

Maximum DNL Error: 0.5LSB

■

Low Cost

The low power supply current and the small SO-8 package

maketheLTC1448idealforbattery-poweredapplications.

APPLICATIONS

■

Digital Calibration

■

Industrial Process Control

■

Automatic Test Equipment

Cellular Telephones

, LTC and LT are registered trademarks of Linear Technology Corporation.

■

TYPICAL APPLICATION

Functional Block Diagram: 12-Bit Rail-to-Rail Dual DAC

Differential Nonlinearity

vs Input Code

2.7V TO 5.5V

0.5

0.4

0.3

0.2

REF

–

0.1

OUT B

12-BIT

DAC B

–0.1

µP

CLK

–0.2

24-BIT

SHIFT

REG

RAIL-TO-RAIL

–0.3

VOLTAGE

CS/LD

OUTPUTS

–0.4

–0.5

AND

DAC

LATCH

–

512 1024 1536 2048 2560 3072 3584 4095

CODE

OUT A

12-BIT

DAC A

1448 TA02

POWER-ON

RESET

GND

1448 TA01

12 3 4 5 6 7...12

中文翻译

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