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PIN DESCRIPTION

1

2

3

4

12

11

10

9

SCLK

SYNC

SDO

GND

16 15 14 13

5

6

7

8

DAC7552

SLAS442B – JANUARY 2005 – REVISED JUNE 2005

RGT PACKAGE

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Terminal Functions

TERMINAL

DESCRIPTION

NO.

NAME

1

Analog output voltage from DAC A

2

Analog voltage supply input

3

GND

Ground

4

Analog output voltage from DAC B

5

VFBB

DAC B amplifier sense input. (For voltage output operation, connect to VOUTB externally.)

6

VREFB

Positive reference voltage input for DAC B

7

PD

Power-down

8

DCEN

Daisy-chain enable

9

SDO

Serial data output

10

IOVDD

I/O voltage supply input. (For single supply operation, connect to VDD externally.)

11

SYNC

Frame synchronization input. The falling edge of the SYNC pulse indicates the start of a serial data frame shifted out

to the DAC7552

12

SCLK

Serial clock input

13

SDIN

Serial data input

14

CLR

Asynchronous input to clear the DAC registers. When CLR is low, the DAC registers are set to 000H and the output

voltage to 0 V.

15

VREFA

Positive reference voltage input for DAC A

16

VFBA

DAC A amplifier sense input. (For voltage output operation, connect to VOUTA externally.)

6