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LTC1450/LTC1450L

Parallel Input, 12-Bit

Rail-to-Rail Micropower

DACs in SSOP

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Guaranteed Monotonic

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Buffered True Rail-to-Rail Voltage Output

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12-Bit Resolution

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Parallel 12-Bit or 8 + 4-Bit Double Buffered

Digital Input

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Internal Reference

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Output Buffer Configurable to Gain of 1 or 2

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Configurable as a Multiplying DAC

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Internal Power-On Reset

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Maximum DNL Error: 0.5LSB

The LTC

to-rail voltage output, 12-bit digital-to-analog converters

(DACs) in a 24-pin SSOP or PDIP package. They include an

output buffer amplifier, reference and a double buffered

parallel digital interface.

The LTC1450 operates from a 4.5V to 5.5V supply. The

output can be pin strapped for 4.095V or 2.048V full-scale.

It has a 2.048V internal reference.

The LTC1450L operates from a 2.7V to 5.5V supply. The

output can be pin strapped for 2.5V or 1.22V full-scale. It

has a 1.22V internal reference.

The LTC1450/LTC1450L offer true stand-alone perfor-

mance. In addition, the reference output, high and low

reference inputs and gain setting resistor are brought to

pins for maximum flexibility.

FEATURES

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

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Digital Calibration

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Industrial Process Control

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Automatic Test Equipment

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Arbitrary Function Generators

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Battery-Powered Data Conversion Products

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Feedback Control Loops and Gain Control

REFLO

GND

LTC1450:

0V TO 4.095V

LTC1450L:

0V TO 2.5V

LTC1450: 5V

LTC1450L: 3V TO 5V

12-BIT

DAC

REFHI

REFOUT

X1/X2

LTC1450

LTC1450L

1450/50L TA01

UPPER

4-BIT

INPUT

LATCH

D11 (MSB)

D8

D7

DATA IN FROM

MICROPROCESSOR

DATA BUS

FROM

MICROPROCESSOR

DECODE LOGIC

FROM

SYSTEM RESET

D0 (LSB)

–

+

REFERENCE

LTC1450: 2.048V

LTC1450L: 1.22V

12-BIT

DAC

LATCH

POWER-ON

RESET

LDAC

CLR

WR

CSMSB

CSLSB

LOWER

8-BIT

INPUT

LATCH

CODE

0

0.5

0.0

–0.5

1024

2048 2560

1450/50L TA02

512

1536

3072 3584 4095

Differential Nonlinearity

vs Input Code