ICM7377B/7357B/7337B

Quad 12/10/8-Bit Voltage Output DACs

with Serial Interface and Adjustable Output Gain

Rev. A8

ICmic reserves the right to change the specifications without prior notice.

2

IC MICROSYSTEMS

PACKAGE

20 Lead QSOP

VDD

1

20

AGND

FBA

2

19

FBD

VOA

3

18

VOD

VOB

4

17

VOC

FBB

5

16

FBC

REFAB

6

15

REFCD

CLR

7

14

N/C

CS

8

13

REFOUT

SDI

9

12

SDO

SCK

10

11

DGND

TOP VIEW

PIN DESCRIPTION (20 Lead QSOP)

Pin

Name

I/O

Description

1

VDD

I

Supply Voltage

2

FBA

I

Inverting Input of The Output Amplifier DAC A. Output Amplifier Feedback Input.

3

VOA

O

DAC A Output Voltage

4

VOB

O

DAC B Output Voltage

5

FBB

I

Inverting Input of The Output Amplifier DAC B. Output Amplifier Feedback Input.

6

REFAB

I

Reference Voltage Input for DAC A and DAC B

7

CLR

I

Active Low Clear Input (CMOS). Resets All Registers to Zero. DAC outputs go to 0 V

8

CS

I

Active Low Chip Select (CMOS)

9

SDI

I

Serial Data Input (CMOS)

10

SCK

I

Serial Clock Input (CMOS)

11

DGND

I

Digital Ground

12

SDO

O

Serial Data Output

13

REFOUT

O

Reference Output

14

N/C

-

No Connection

15

REFCD

I

Reference Voltage Input for DAC C and DAC D

16

FBC

I

Inverting Input of The Output Amplifier DAC C. Output Amplifier Feedback Input.

17

VOC

O

DAC C Output Voltage

18

VOD

O

DAC D Output Voltage

19

FBD

I

Inverting Input of The Output Amplifier DAC D. Output Amplifier Feedback Input.

20

AGND

I

Analog Ground