Datasheet > LTC1454_15

LTC1454_15

更新时间： 2024-01-07 23:56:37

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
12页	181K
描述
Dual 12-Bit Rail-to-Rail Micropower DACs

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中文翻译

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LTC1454_15 数据手册

LTC1454/LTC1454L

Dual 12-Bit Rail-to-Rail

Micropower DACs

DESCRIPTION

FEATURES

■

12-Bit Resolution

The LTC^®1454/LTC1454L are complete single supply,

dual rail-to-rail voltage output, 12-bit digital-to-analog

converters (DACs) in a 16-lead SO package. They include

an output buffer amplifier with variable gain (×1 or ×2)

and an easy-to-use 3-wire cascadable serial interface.

■

Buffered True Rail-to-Rail Voltage Output

■

5V Operation, I_CC: 700µA Typ (LTC1454)

■

3V Operation, I_CC: 450µA Typ (LTC1454L)

Built-In Reference: 2.048V (LTC1454)

■

1.220V (LTC1454L)

The LTC1454 has an onboard reference of 2.048V and a

full-scale output of 4.095V in a ×2 gain configuration. It

operates from a single 4.5V to 5.5V supply.

■

CLR Pin

■

Power-On Reset

■

16-Lead SO Package

3-Wire Cascadable Serial Interface

Maximum DNL Error: 0.5LSB

Low Cost

■

The LTC1454L has an onboard 1.22V reference and a full-

scale output of 2.5V in a ×2 gain configuration. It operates

from a single 2.7V to 5.5V supply.

Low power supply current, excellent DNL and small size

allow these parts to be used in a host of applications where

size, DNL and single supply operation are important.

APPLICATIONS

■

Digital Calibration

■

Industrial Process Control

■

Automatic Test Equipment

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

■

Cellular Telephones

TYPICAL APPLICATION

Daisy-Chained Control Outputs

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

Differential Nonlinearity

vs Input Code

LTC1454: 2.048V

LTC1454L: 1.22V

LTC1454: 5V

LTC1454L: 3V TO 5V

9, 15

0.5

REFOUT

REFHI B

0.4

0.3

–

OUT B

0.2

0.1

12-BIT

DAC B

CLK

24-BIT

SHIFT

REG

µP

X1/X2 B

REFHI A

–0.1

–0.2

–0.3

–0.4

–0.5

CS/LD

AND

DAC

LATCH

–

OUT A

OUT

12-BIT

DAC A

2560 4095

3072 3584

2048

512 1024 1536

X1/X2 A

CODE

POWER-ON

RESET

1454 G08

REFLO

GND

CLR

1454 BD02

12 3 4 5 6 7...12

中文翻译

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