LTC1663

1

1663fd

BLOCK DIAGRAM

FEATURES

APPLICATIONS

DESCRIPTION

10-Bit Rail-to-Rail

Micropower DAC with

2-Wire Interface

buffered rail-to-rail output voltage capability. It operates

from a single supply with a range of 2.7V to 5.5V. The

reference for the DAC is selectable between the supply

voltage or an internal bandgap reference. Selecting the

internal bandgap reference will set the full-scale output

voltage range to 2.5V. Selecting the supply as the reference

sets the output voltage range to the supply voltage.

The part features a simple 2-wire serial interface compat-

ible with SMBus that allows communication between many

devices. The internal data registers are double buffered to

allow for simultaneous update of several devices at once.

The DAC can be put in low current power-down mode for

use in power conscious systems.

Power-on reset ensures the DAC output is at 0V when

power is initially applied, and all internal registers are

cleared.

Differential Nonlinearity (DNL)

with SMBus

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other

trademarks are the property of their respective owners.

10-BIT

DAC LATCH

INPUT

LATCH

2-WIRE INTERFACE

SDA

AD0

(6)

MSOP

PACKAGE

ONLY

(2)

(3)

AD1

AD2

SCL

1 (1)

5 (4)

GND

R

R

2 (7)

1663 BD

1.25V

4 (5)

BANDGAP

REFERENCE

REFERENCE

SELECT

–

+

COMMAND

LATCH

NOTE: PIN NUMBERS IN PARENTHESES REFER TO THE MSOP PACKAGE

CODE

0

–1.0

–0.8

–0.4

–0.2

0

1.0

0.4

156

512

640

1663 TA01

–0.6

0.6

0.8

0.2

28

384

768 896 1024