Low-Cost, Triple, 8-Bit Voltage-Output DACs

with Serial Interface

14

______________________________________________________________________________________

DAC B

DAC A

OUTA

OUTB

MAX512

MAX513

0.05

µF

0.01

µF

REFAB = -4.2V

Figure 5. RF Bias Circuit

DAC

LATCH

A

DAC A

DAC

LATCH

B

DAC B

DAC

LATCH

C

LATCH

DAC C

SCLK

OUTA

OUTB

OUTC

LOUT

DIN

CS

REFAB

REFC

RESET

GND

MAX512

MAX513

12

45

6

7

8

9

10

11

12

3

14

0.22

µF

0.22

µF

0.1

µF

0.1

µF

0.1

µF

0.1

µF

0.05

µF

0.1

µF

R*

R*

** CONNECT PIN 8 TO GND

ICL7612A**

ICL7612A**

* R IN 10k

Ω RANGE

R*

R*

Figure 4. Bipolar Output Circuit