LTC1655IS8 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC1655IS8

16-Bit Rail-to-Rail Micropower DACs in SO-8 Package

Linear Technology 

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LTC1655/LTC1655L

TYPICAL APPLICATIONS

This circuit shows how to make a bipolar output 16-bit

DAC with a wide output swing using an LTC1655 and an

LT1077. R1 and R2 resistively divide down the LTC1655

output and an offset is summed in using the LTC1655

onboard 2.048V reference and R3 and R4. R5 ensures that

the onboard reference is always sourcing current and

never has to sink any current even when VOUT is at full

scale. The LT1077 output will have a wide bipolar output

swing of – 4.096V to 4.096V as shown in the figure below.

With this output swing 1LSB = 125µV.

4.096

0

VOUT

– 4.096

A Wide Swing, Bipolar Output 16-Bit DAC

5V

0.1µF

8

1

VCC

CLK

µP

2

DIN

LTC1655 VOUT 7

3

CS/LD

GND VREF

5

6

TRANSFER CURVE

32768

65535

DIN

R3

100k

1%

R5

100k

1%

R1

100k

1%

R2

200k

1%

5V

3+ 7

6

LT1077

2–

4

R4

– 5V 200k

1%

VOUT:

(2)(DIN)(4.096)

65536

–

4.096V

1655/55L TA05

12

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