AD9754

–5–

REV. A

PIN FUNCTION DESCRIPTIONS

Pin No.

Name

Description

1

DB13

Most Significant Data Bit (MSB).

2–13

DB12–DB1 Data Bits 1–12.

14

DB0

Least Significant Data Bit (LSB).

15

SLEEP

Power-Down Control Input. Active High. Contains active pull-down circuit; it may be left unterminated if

not used.

16

REFLO

Reference Ground when Internal 1.2 V Reference Used. Connect to AVDD to disable internal reference.

17

REFIO

Reference Input/Output. Serves as reference input when internal reference disabled (i.e., Tie REFLO to

AVDD). Serves as 1.2 V reference output when internal reference activated (i.e., Tie REFLO to ACOM).

Requires 0.1

µF capacitor to ACOM when internal reference activated.

18

FS ADJ

Full-Scale Current Output Adjust.

19, 25

NC

No Connect.

20

ACOM

Analog Common.

21

IOUTB

Complementary DAC Current Output. Full-scale current when all data bits are 0s.

22

IOUTA

DAC Current Output. Full-scale current when all data bits are 1s.

23

ICOMP

Internal Bias Node for Switch Driver Circuitry. Decouple to ACOM with 0.1

µF capacitor.

24

AVDD

Analog Supply Voltage (+4.5 V to +5.5 V).

26

DCOM

Digital Common.

27

DVDD

Digital Supply Voltage (+2.7 V to +5.5 V).

28

CLOCK

Clock Input. Data latched on positive edge of clock.

PIN CONFIGURATION

14

13

12

11

17

16

15

20

19

18

10

9

8

1

2

3

4

7

6

5

TOP VIEW

(Not to Scale)

28

27

26

25

24

23

22

21

AD9754

NC = NO CONNECT

(MSB) DB13

DB12

DB11

DB10

DB9

DB8

DB7

DB6

DB5

DB4

DB3

DB2

DB1

(LSB) DB0

CLOCK

DVDD

DCOM

NC

AVDD

ICOMP

IOUTA

IOUTB

ACOM

NC

FS ADJ

REFIO

REFLO

SLEEP