LTC1597BIN(RevA) View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC1597BIN
(Rev.:RevA)

14-Bit and 16-Bit Parallel Low Glitch Multiplying DACs with 4-Quadrant Resistors

Linear Technology 

APPLICATIONS INFORMATION

LTC1591/LTC1597

VREF

+

1/2 LT1112

–

5V

0.1μF

3

2

1

23 4

5

R1

RCOM

REF VCC ROFS

RFB

14

DATA

INPUTS

R1

R2

LTC1591-1

ROFS RFB

14-BIT DAC

IOUT1 6

AGND 7

10 TO 21,

24, 25

WR LD CLR

WR

9 8 28

LD

CLR

NC NC

26 27

22

DGND

33pF

–

1/2 LT1112

+

Bipolar Offset Binary Code Table

VOUT =

–VREF

TO VREF

DIGITAL INPUT

BINARY NUMBER

IN DAC REGISTER

MSB

LSB

1111 1111 1111 11

1000 0000 0000 01

1000 0000 0000 00

0111 1111 1111 11

0000 0000 0000 00

ANALOG OUTPUT

VOUT

VREF (8,191/8,192)

VREF (1/8,192)

0V

–VREF (1/8,192)

–VREF

1591/97 F02a

Figure 2a. Bipolar Operation (4-Quadrant Multiplication) VOUT = – VREF to VREF

VREF

+

1/2 LT1112

–

5V

0.1μF

3

2

1

23 4

5

R1

RCOM

REF VCC ROFS

RFB

16

DATA

INPUTS

R1

R2

LTC1597-1

ROFS RFB

16-BIT DAC

IOUT1 6

AGND 7

10 TO 21,

24 TO 27

WR LD CLR

WR

9 8 28

LD

CLR

22

DGND

33pF

–

1/2 LT1112

+

VOUT =

–VREF

TO VREF

Bipolar Offset Binary Code Table

DIGITAL INPUT

BINARY NUMBER

IN DAC REGISTER

MSB

LSB

1111

1000

1000

0111

0000

1111

0000

0000

1111

0000

1111

0000

0000

1111

0000

1111

0001

0000

1111

0000

ANALOG OUTPUT

VOUT

VREF (32,767/32,768)

VREF (1/32,768)

0V

–VREF (1/32,768)

–VREF

1591/97 F02b

Figure 2b. Bipolar Operation (4-Quadrant Multiplication) VOUT = – VREF to VREF

15917fa

15

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