1

LTC2604/LTC2614/LTC2624

2604f

APPLICATIO S

FEATURES

DESCRIPTIO

BLOCK DIAGRA

Quad 16-Bit Rail-to-Rail DACs

in 16-Lead SSOP

The LTC

12-bit 2.5V to 5.5V rail-to-rail voltage output DACs in

16-lead narrow SSOP packages. These parts have sepa-

rate reference inputs for each DAC. They have built-in

high performance output buffers and are guaranteed

monotonic.

These parts establish advanced performance standards

for output drive, crosstalk and load regulation in single-

supply, voltage output multiples.

The parts use a simple SPI/MICROWIRE

3-wire serial interface which can be operated at clock

rates up to 50MHz. Daisy-chain capability and a hardware

CLR function are included.

The LTC2604/LTC2614/LTC2624 incorporate a power-

on reset circuit. During power-up, the voltage outputs

rise less than 10mV above zero scale; and after power-

up, they stay at zero scale until a valid write and update

take place.

s

Smallest Pin Compatible Quad 16-Bit DAC:

LTC2604: 16-Bits

LTC2614: 14-Bits

LTC2624: 12-Bits

s

Guaranteed 16-Bit Monotonic Over Temperature

s

Separate Reference Inputs for each DAC

s

Wide 2.5V to 5.5V Supply Range

s

Low Power Operation: 250

µA per DAC at 3V

s

Individual DAC Power-Down to 1

µA, Max

s

Ultralow Crosstalk Between DACs (<5

µV)

s

High Rail-to-Rail Output Drive (

±15mA)

s

Double Buffered Digital Inputs

s

16-Lead Narrow SSOP Package

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Mobile Communications

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Process Control and Industrial Automation

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Instrumentation

s

Automatic Test Equipment

Differential Nonlinearity (LTC2604)

, LTC and LT are registered trademarks of Linear Technology Corporation.

2

15

1

GND

REF LO

REF A

REF B

CS/LD

SCK

REF D

REF C

SDO

SDI

2604 BD

16

3

4

14

DAC A

DAC D

5

7

6

8

10

12

9

13

DAC B

DAC C

DECODE

CONTROL

LOGIC

32-BIT SHIFT REGISTER

CLR

11

CODE

0

16384

32768

49152

65535

2604 TA01

1.0

0.8

0.6

0.4

0.2

0

–0.2

–0.4

–0.6

–0.8

–1.0

MICROWIRE is a trademark of National Semiconductor Corp.