LTC1655CS8 datasheet(12/12 Pages) LINER

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LTC1655

1655f LT/TP 0399 4K • PRINTED IN USA

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408)432-1900q FAX:(408)434-0507 q www.linear-tech.com

PART NUMBER DESCRIPTION

COMMENTS

LTC1257

Single 12-Bit VOUT DAC, Full Scale: 2.048V, VCC: 4.75V to 15.75V,

5V to 15V Single Supply, Complete VOUT DAC in

Reference Can Be Overdriven Up to 12V, i.e., FSMAX = 12V

SO-8 Package

LTC1446/

Dual 12-Bit VOUT DACs in SO-8 Package

LTC1446: VCC = 4.5V to 5.5V, VOUT = 0V to 4.095V

LTC1446L

LTC1446L: VCC = 2.7V to 5.5V, VOUT = 0V to 2.5V

LTC1448

Dual 12-Bit VOUT DAC, VCC: 2.7V to 5.5V

Output Swings from GND to REF. REF Input Can Be Tied to VCC

LTC1450/

Single 12-Bit VOUT DACs with Parallel Interface

LTC1450: VCC = 4.5V to 5.5V, VOUT = 0V to 4.095V

LTC1450L

LTC1450L: VCC = 2.7V to 5.5V, VOUT = 0V to 2.5V

LTC1451

Single Rail-to-Rail 12-Bit DAC, Full Scale: 4.095V, VCC: 4.5V to 5.5V,

5V, Low Power Complete VOUT DAC in SO-8 Package

Internal 2.048V Reference Brought Out to Pin

LTC1452

Single Rail-to-Rail 12-Bit VOUT Multiplying DAC, VCC: 2.7V to 5.5V

Low Power, Multiplying VOUT DAC with Rail-to-Rail

Buffer Amplifier in SO-8 Package

LTC1453

Single Rail-to-Rail 12-Bit VOUT DAC, Full Scale: 2.5V, VCC: 2.7V to 5.5V 3V, Low Power, Complete VOUT DAC in SO-8 Package

LTC1454/

Dual 12-Bit VOUT DACs in SO-16 Package with Added Functionality

LTC1454: VCC = 4.5V to 5.5V, VOUT = 0V to 4.095V

LTC1454L

LTC1454L: VCC = 2.7V to 5.5V, VOUT = 0V to 2.5V

LTC1456

Single Rail-to-Rail Output 12-Bit DAC with Clear Pin,

Low Power, Complete VOUT DAC in SO-8

Full Scale: 4.095V, VCC: 4.5V to 5.5V

Package with Clear Pin

LTC1458/

Quad 12 Bit Rail-to-Rail Output DACs with Added Functionality

LTC1458: VCC = 4.5V to 5.5V, VOUT = 0V to 4.095V

LTC1458L

LTC1458L: VCC = 2.7V to 5.5V, VOUT = 0V to 2.5V

LTC1650

Single 16-Bit VOUT Industrial DAC in 16-Pin SO, VCC = ±5V

Low Power, Deglitched, 4-Quadrant Mulitplying VOUT

DAC, Output Swing

±4.5V

LTC1658

Single Rail-to-Rail 14-Bit VOUT DAC in 8-Pin MSOP,

Low Power, Multiplying VOUT DAC in MS8 Package. Output

VCC = 2.7V to 5.5V

Swings from GND to REF. REF Input Can Be Tied to VCC

LTC1659

Single Rail-to-Rail 12-Bit VOUT DAC in 8-Pin MSOP,

Low Power, Multiplying VOUT DAC in MS8 Package. Output

VCC = 2.7V to 5.5V

Swings from GND to REF. REF Input Can Be Tied to VCC

RELATED PARTS

TYPICAL APPLICATION

This circuit shows a digitally programmable current source

from an external voltage source using an external op amp,

an LT1077 and an NPN transistor (2N3440). Any digital

word from 0 to 65535 is loaded into the LTC1655 and its

output correspondingly swings from 0V to 4.096V. In the

configuration shown, R1, R2 resistively divide down the

LTC1655 output voltage. This divided voltage will be

forced across the resistor RA. If RA is chosen to be 205Ω,

the output current will range from 0mA at zero scale to

10mA at full scale. The minimum voltage for VS is deter-

mined by the load resistor RL and Q1’s VCESAT voltage.

With a load resistor of 50

Ω, the voltage source can be as

low as 3.3V.

Digitally Programmable Current Source

CLK

DIN

CS/LD

0.1

µF

VCC

VOUT

GND

LTC1655

µP

1655 TA04

–

LT1077

VS + 3.3V TO 100V

FOR RL ≤ 50Ω

2N3440

205

Ω

IOUT =

•

≈ 0mA TO 10mA

100k

(DIN)(4.096)

(65536)(RA)

LTC1655CS8 Datasheet(PDF) 12 Page - Linear Technology

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