LTC2631

1

2631fb

BLOCK DIAGRAM

FEATURES

APPLICATIONS

DESCRIPTION

10ppm/°C Reference

output DACs with an integrated, high accuracy, low-drift

reference in an 8-lead TSOT-23 package. It has a rail-to-rail

output buffer that is guaranteed monotonic.

The LTC2631-L has a full-scale output of 2.5V, and oper-

ates from a single 2.7V to 5.5V supply. The LTC2631-H

has a full-scale output of 4.096V, and operates from a 4.5V

to 5.5V supply. A 10ppm/°C reference output is available

at the REF pin.

Each DAC can also operate in External Reference mode,

in which a voltage supplied to the REF pin sets the full-

scale output.

interface. The LTC2631 operates in both the standard

mode (clock rate of 100kHz) and the fast mode (clock

rate of 400kHz).

The LTC2631 incorporates a power-on reset circuit. Op-

tions are available for reset to zero-scale or reset to mid-

scale after power-up.

Integral Nonlinearity (LTC2631A-LM12)

2.5V Full-Scale 10ppm/°C (LTC2631-L)

4.096V Full-Scale 10ppm/°C (LTC2631-H)

ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the

property of their respective owners. Protected by U.S. Patents including 5396245, 5859606,

6891433, 6937178 and 7414561.

(LTC2631-M)

DAC

REGISTER

RESISTOR

DIVIDER

INTERNAL

REFERENCE

INPUT

REGISTER

INTERFACE

DAC

SWITCH

CONTROL

DECODE LOGIC

SDA

REF

GND

DACREF

2631 TA01

SCL

CA0

REF_SEL

ADDRESS

DECODE

CODE

0

0

0.5

4095

2631 TA01b

–0.5

–1.0

1024

2048

3072

1.0