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LTC1821

APPLICATIO S

DESCRIPTIO

FEATURES

TYPICAL APPLICATIO

16-Bit, Ultra Precise,

The LTC

output DAC that operates from analog supply voltages of

±5V up to ±15V. INL and DNL are accurate to 1LSB over the

industrial temperature range in both unipolar 0V to 10V and

bipolar

±10Vmodes.Precise16-bitbipolar±10Voutputsare

achieved with on-chip 4-quadrant multiplication resistors.

The LTC1821 is available in a 36-lead SSOP package and is

specified over the industrial temperature range.

The device includes an internal deglitcher circuit that reduces

the glitch impulse to less than 2nV•s (typ). The LTC1821

settles to 1LBS in 2

µs with a full-scale 10V step. The

combination of fast, precise settling and ultra low glitch make

the LTC1821 ideal for precision industrial control applica-

tions.

The asynchronous CLR pin resets the LTC1821 to zero scale

and resets the LTC1821-1 to midscale.

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Process Control and Industrial Automation

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Precision Instrumentation

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Direct Digital Waveform Generation

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Software-Controlled Gain Adjustment

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Automatic Test Equipment

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

LTC1821/LTC1821-1

Integral Nonlinearity

16-Bit, 4-Quadrant Multiplying DAC with a

Minimum of External Components

DIGITAL INPUT CODE

0

1.0

0.8

0.6

0.4

0.2

0

–0.2

–0.4

–0.6

–0.8

–1.0

16384

32768

1821 TA02

49152

65535

LTC1821-1

5V

LD

LD

10

9

3

2

24 23

7

2

6

15pF

17

16

20

13

15

R1

8

REF

11

12

14

0.1

µF

1

22

15pF

1821 TA01

DGND

NC

AGNDS

AGNDF

LT

WR

3 TO 6,

25 TO 36

WR

CLR

CLR

16-BIT DAC

R1

R2

16

DATA

INPUTS

0.1

µF

15V

–15V

0.1

µF

21

DNC*

19

DNC*

18

*DO NOT CONNECT

DNC*

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2

µs Settling to 0.0015% for 10V Step

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1LSB Max DNL and INL Over Industrial

Temperature Range

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On-Chip 4-Quadrant Resistors Allow Precise 0V to

10V, 0V to –10V or

±10V Outputs

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Low Glitch Impulse: 2nV•s

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Low Noise: 13nV/

√Hz

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36-Lead SSOP Package

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Power-On Reset

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Asynchronous Clear Pin

LTC1821: Reset to Zero Scale

LTC1821-1: Reset to Midscale