LTC2637

1

2637fb

DACs with 10ppm/°C Reference

FEATURES

APPLICATIONS

DESCRIPTION

voltage-output DACs with an integrated, high-accuracy,

low-drift 10ppm/°C reference in 14-lead DFN and 16-lead

MSOP packages. It has a rail-to-rail output buffer and is

guaranteed monotonic. The LTC2637-L has a full-scale

output of 2.5V, and operates from a single 2.7V to 5.5V

supply. The LTC2637-H has a full-scale output of 4.096V,

and operates from a 4.5V to 5.5V supply. Each DAC can

also operate with an external reference, which sets the DAC

full-scale output to the external reference voltage.

serial interface. The LTC2637 operates in both the standard

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

of 400kHz). The LTC2637 incorporates a power-on reset

circuit. Options are available for reset to zero-scale or

reset to mid-scale in internal reference mode, or reset to

mid-scale in external reference mode after power-up.

2.5V Full-Scale 10ppm/°C (LTC2637-L)

4.096V Full-Scale 10ppm/°C (LTC2637-H)

Temperature Range

× 3mm DFN and 16-Lead MSOP

Packages

BLOCK DIAGRAM

Integral Nonlinearity (LTC2637-LZ12)

2637 BD

GND

CAO

(CA1)

(CA2)

REF

SCL

INTERNAL REFERENCE

SWITCH

DAC A

DECODE

POWER-ON RESET

DAC B

DAC C

DAC D

DAC H

DAC G

DAC F

DAC E

ADDRESS

DECODE

( ) MSOP PACKAGE ONLY

SDA

CODE

0

2

1

0

–1

–2

1024

3072

2637 TA01

4095

2048

INTERNAL REF.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and

ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property

of their respective owners. Protected by U.S. Patents including 5396245, 5859606, 6891433,

6937178, 7414561.