LTC7545A Просмотр технического описания (PDF) - Linear Technology

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производитель

LTC7545A

Improved Industry Standard Parallel 12-Bit Multiplying DAC

Linear Technology 

LTC7545A

TYPICAL APPLICATIONS N

Bipolar Operation (4-Quadrant Multiplication)

VREF

–10V TO 10V

5V OR 15V

0.1µF

18 19 20

VDD VREF RFB

17 WR

16

CS

1

LTC7545A OUT1

µP

AGND 2

DB11–DB0 DGND

4–15

3

R2

R3

20K

20K

33pF

–

R1

10K

–

1/2LT1112

+

1/2LT1112

+

VOUT

Table 2. Bipolar Offset Binary Code Table

DIGITAL INPUT

BINARY NUMBER

IN DAC LATCH

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 (2048/2048) = –VREF

7545A TA04

6

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