www.ti.com

PIN DESCRIPTION

25

26

27

28

29

30

31

32

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

24 23 22 21 20 19 18 17

VREF4

DCEN

PD

VDD

AGND

RSTSEL

RST

VREF1

VREF3

SYNC

SCLK

SDIN

DGND

IOVDD

SDO

VREF2

RHB PACKAGE

(TOP VIEW)

DAC7558

SLAS435A – MAY 2005 – REVISED DECEMBER 2005

Terminal Functions

TERMINAL

DESCRIPTION

NO.

NAME

1

VFBA

DAC A amplifier sense input

2

VOUTA

Analog output voltage from DAC A

3

VOUTB

Analog output voltage from DAC B

4

VFBB

DAC B amplifier sense input

5

VFBC

DAC C amplifier sense input

6

VOUTC

Analog output voltage from DAC C

7

VOUTD

Analog output voltage from DAC D

8

VFBD

DAC D amplifier sense input

9

VREF2

Positive reference voltage input for DAC C and DAC D

10

SDO

Serial data output

11

IOVDD

I/O voltage supply input

12

DGND

Digital ground

13

SDIN

Serial data input

14

SCLK

Serial clock input

15

SYNC

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

to the DAC7558.

16

VREF3

Positive reference voltage input for DAC E and DAC F

17

VFBE

DAC E amplifier sense input

18

VOUTE

Analog output voltage from DAC E

19

VOUTF

Analog output voltage from DAC F

20

VFBF

DAC F amplifier sense input

21

VFBG

DAC G amplifier sense input

22

VOUTG

Analog output voltage from DAC G

23

VOUTH

Analog output voltage from DAC H

24

VFBH

DAC H amplifier sense input

6