LTC7541 データシートの表示（PDF） - Linear Technology

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LTC7541

Improved Industry Standard Serial 12-Bit Multiplying DACs

Linear Technology 

LTC7541A

TYPICAL APPLICATIONS N

VREF

– 10 TO 10V

15V

Unipolar Operation (2-Quadrant Multiplication)

0.1µF

16

VDD

17

VREF

18

RFB

1

OUT 1

LTC7541A

4 TO 15

OUT 2

GND 2

3

DIGITAL INPUTS

33pF

–

LT1097

+

Table 1. Unipolar Binary Code Table

DIGITAL INPUT

VOUT MSB

LSB

1111 1111 1111

1000 0000 0000

0000 0000 0001

0000 0000 0000

ANALOG OUTPUT

VOUT

–VREF (4095/4096)

–VREF (2048/4096) = –VREF/ 2

–VREF (1/4096)

0V

7541 TA03

VREF

– 10 TO 10V

Bipolar Operation (4-Quadrant Multiplication)

R2

R3

20k

20k

15V

0.1µF

16

VDD

17

VREF

18

RFB

1

OUT 1

LTC7541A

4 TO 15

OUT 2

GND 2

3

33pF

–

1/2 LT1112

+

R1

10k

–

1/2 LT1112

+

VOUT

DIGITAL INPUTS

Table 2. Bipolar Offset Binary Code Table

DIGITAL INPUT

MSB

LSB

1111 1111 1111

1000 0000 0001

1000 0000 0000

0111 1111 1111

0000 0000 0000

ANALOG OUTPUT

VOUT

VREF (2047/2048)

VREF (1/2048)

0V

–VREF (1/2048)

–VREF

7541 TA04

RELATED PARTS

PART NUMBER

LTC1257

LTC1451/LTC1452/LTC1453

LTC7543/LTC8143

LTC8043

DESCRIPTION

Complete Serial I/O VOUT 12-Bit DAC

Complete Serial I/O VOUT 12-Bit DACs

Serial I/O Muliplying 12-Bit DACs

Serial Mulitplying 12-Bit DAC

COMMENTS

5V to 15V Single Supply in 8-Pin SO and PDIP

3V/5V Single Supply in 8-Pin SO and PDIP

Clear Pin, Serial Data Output (LTC8143)

8-Pin SO and PDIP

4

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7487

(408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977

LT/GP 1195 6K • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1995

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