LTC2655

1

2655f

BLOCK DIAGRAM

FEATURES

DESCRIPTION

Rail-to-Rail DACs with

10ppm/°C Max Reference

Rail DACs with integrated 10ppm/°C max reference. The

DACs have built-in high performance, rail-to-rail, output

buffers and are guaranteed monotonic. The LTC2655-L

has a full-scale output of 2.5V with the integrated refer-

ence and operates from a single 2.7V to 5.5V supply.

The LTC2655-H has a full-scale output of 4.096V with

the integrated reference and operates from a 4.5V to

5.5V supply. Each DAC can also operate with an external

reference, which sets the full-scale output to 2 times the

external reference voltage.

The LTC2655 operates in both the standard mode (maxi-

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

clock rate of 400kHz). The LTC2655 incorporates a

power-on reset circuit that is controlled by the PORSEL

pin. If PORSEL is tied to GND the DACs power-on reset to

reset to mid-scale.

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

Technology Corporation. All other trademarks are the property of their respective owners.

Protected by U.S. Patents including 5396245, 6891433 and 7671770.

INL Curve

APPLICATIONS

× 4mm QFN and

16-Lead Narrow SSOP packages

2655 BD

GND

SCL

CA2

LDAC

REFLO

CA1

CA0

REFIN/OUT

REFCOMP

PORSEL

SDA

INTERNAL REFERENCE

DAC A

POWER-ON

RESET

DAC B

DAC D

DAC C

32-BIT SHIFT REGISTER

2-WIRE INTERFACE

CODE

128

4

–2

–1

–3

2

3

1

0

–4

32768

49152

16384

2655 TA01b

65535