Datasheet > LTKC

LTKC

更新时间： 2024-02-25 04:28:22

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
12页	188K
描述
Ultralow Power, Dual 10-Bit DAC in MSOP

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中文翻译

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数据手册

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LTKC 数据手册

LTC1662

Ultralow Power, Dual

10-Bit DAC in MSOP

DESCRIPTIO

FEATURES

The LTC^®1662 is an ultralow power, fully buffered volt-

ageoutput,dual10-bitdigital-to-analogconverter(DAC).

Each DAC channel draws just 1.7µA (typ) total supply-

plus-reference operating current, yet is capable of sup-

plying DC output currents in excess of 1mA and reliably

driving capacitive loads of up to 1000pF. A program-

mable Sleep mode further reduces total operating cur-

rent to 0.05µA.

■

Ultralow Power: 1.5µA (Typ) I_CCper DAC Plus

0.05µA Sleep Mode for Extended Battery Life

■

Tiny: Two 10-Bit DACs in an 8-Lead MSOP—

Half the Size of an SO-8

Wide 2.7V to 5.5V Supply Range

■

Double Buffered for Simultaneous DAC Updates

■

Rail-to-Rail Voltage Outputs Drive 1000pF

■

Reference Range Includes Supply for Ratiometric

0V-to-V_CCOutput

Linear Technology’s proprietary, inherently monotonic

architecture provides excellent linearity and an exception-

ally small external form factor. The double-buffered input

logic provides simultaneous update capability and can be

usedtowritetotheDACswithoutinterruptingSleepmode.

■

Reference Input Impedance Is Code-Independent

(7.1MΩ Typ)—Eliminates External Buffers

■

3-Wire Serial Interface with

Schmitt Trigger Inputs

■

Differential Nonlinearity: ±0.75LSB Max

With its tiny operating current and exceptionally small

size, the LTC1662 is ideal for use in the most power-

constrained products. For most designs, there is no

perceptible impact on the power budget; the LTC1662

draws many times less current than even a trimpot, while

providing buffered, low impedance (0.5Ω typical,

V_CC= 5V) rail-to-rail outputs.

APPLICATIO S

■

Mobile Communications

■

Portable Battery-Powered Instruments

■

Remote or Inaccessible Adjustments

■

Digitally Controlled Amplifiers and Attenuators

■

The LTC1662 is pin and software compatible with the

LTC1661 dual, 60µA 10-bit DAC. It is available in 8-pin

MSOP and PDIP packages and is specified over the

industrial temperature range.

Factory or Field Calibration

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

BLOCK DIAGRA

OUT A

GND

OUT B

Total Supply-Plus-Reference

Operating Current

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

10-BIT

DAC A

10-BIT

DAC B

5.5V

4.5V

3.6V

CONTROL

LOGIC

ADDRESS

DECODER

= 2.7V

= V

SHIFT REGISTER

REF

CODE = 1023

–55 –35 –15

25 45 65 85 105 125

TEMPERATURE (°C)

1662 G02

CS/LD

SCK

SDI

REF

1662 BD

12 3 4 5 6 7...12

中文翻译

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