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LTC1657

Parallel 16-Bit Rail-to-Rail

Micropower DAC

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16-Bit Monotonic Over Temperature

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Deglitched Rail-to-Rail Voltage Output: 8nV•s

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5V Single Supply Operation

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Maximum DNL Error:

±1LSB

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Settling Time: 20

µs to ±1LSB

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Internal or External Reference

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Internal Power-On Reset to Zero Volts

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Asynchronous CLR Pin

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Output Buffer Configurable for Gain of 1 or 2

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Parallel 16-Bit or 2-Byte Double Buffered Interface

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Narrow 28-Lead SSOP Package

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Multiplying Capability

The LTC

voltage output, 16-bit digital-to-analog converter (DAC) in

a 28-pin SSOP or PDIP package. It includes a rail-to-rail

output buffer amplifier, an internal 2.048V reference and

a double buffered parallel digital interface.

The LTC1657 operates from a 4.5V to 5.5V supply. It has

a separate reference input pin that can be driven by an

external reference. The full-scale output can be 1 or 2

times the reference voltage depending on how the X1/X2

pin is connected.

The LTC1657 is similar to Linear Technology Corporation’s

path. It is the only buffered 16-bit parallel DAC in a 28-lead

SSOP package and includes an onboard reference for

stand alone performance.

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

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Instrumentation

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Digital Calibration

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Industrial Process Control

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Automatic Test Equipment

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Communication Test Equipment

Differential Nonlinearity

vs Input Code

REFLO

GND

0V TO

4.096V

5V

16-BIT

DAC

R

R

25

REFHI

REFOUT

22

24

23

X1/X2

21

20

26

1657 TA01

D15 (MSB)

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

1

2

28

27

D8

D7

DATA IN FROM

MICROPROCESSOR

DATA BUS

FROM

MICROPROCESSOR

DECODE LOGIC

FROM

SYSTEM RESET

D0 (LSB)

–

+

REFERENCE

2.048V

16-BIT

DAC

REGISTER

POWER-ON

RESET

LDAC

CLR

WR

CSMSB

CSLSB

LSB

8-BIT

INPUT

REGISTER

MSB

8-BIT

INPUT

REGISTER

APPLICATIO S

FEATURES

DESCRIPTIO

BLOCK DIAGRA

DIGITAL INPUT CODE

0

16384

32768

49152

65535

1657 G01

1.0

0.8

0.6

0.4

0.2

0.0

–0.2

–0.4

–0.6

–0.8

–1.0