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LTC1654

Dual 14-Bit Rail-to-Rail DAC

in 16-Lead SSOP Package

April 2000

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14-Bit Monotonic Over Temperature

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Individually Programmable Speed/Power:

3.5

µs Settling Time at 750µA

8

µs Settling Time at 450µA

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Maximum Update Rate: 0.9MHz

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Smallest Dual 14-Bit DAC: 16-Lead Narrow

SSOP Package

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Buffered True Rail-to-Rail Voltage Outputs

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3V to 5V Single Supply Operation

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User Selectable Gain

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Power-On Reset and Clear Function

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Schmitt Trigger On Clock Input Allows Direct

Optocoupler Interface

The LTC

digital-to-analog converter (DAC). It is available in a

16-lead narrow SSOP package, making it the smallest dual

14-bit DAC available. It includes output buffer amplifiers

and a flexible serial interface.

The LTC1654 has REFHI pins for each DAC that can be

tion. It operates from a single 2.7V to 5.5V supply.

The LTC1654 has two programmable speeds: a FAST and

SLOW mode with

±1LSB settling times of 3.5µs or 8µs

respectively and supply currents of 750

µA and 450µA in

the two modes. The LTC1654 also has shutdown capabil-

ity, power-on reset and clear function to 0V.

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Digital Calibration

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Industrial Process Control

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Automatic Test Equipment

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Offset/Gain Adjustment

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

DAC B

1654 BD

REFHI B

REFHI A

–

+

POWER-ON

RESET

DAC A

REFLO A

REFLO B

–

+

INPUT

LATCH

CONTROL

LOGIC

CS/LD

SCK

SDO

CLR

SDI

INPUT

LATCH

DAC

REGISTER

32-BIT

SHIFT

REGISTER

DAC

REGISTER

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

Final Electrical Specifications

FEATURES

DESCRIPTIO

APPLICATIO S

BLOCK DIAGRA