AD9744AR View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

AD9744AR

14-Bit, 210 MSPS TxDAC D/A converter

Analog Devices 

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

AD9744

(MSB) DB13 1

28 CLOCK

DB12 2

27 DVDD

DB11 3

26 DCOM

DB10 4

25 MODE

DB9

DB8

DB7

5

24 AVDD

6 AD9744 23 RESERVED

TOP VIEW

7 (Not to Scale) 22 IOUTA

DB6 8

21 IOUTB

DB5 9

20 ACOM

DB4 10

19 NC

DB3 11

18 FS ADJ

DB2 12

17 REFIO

DB1 13

16 REFLO

(LSB) DB0 14

15 SLEEP

NC = NO CONNECT

Figure 3. 28-Lead SOIC and TSSOP

DB7 1

DB6 2

DVDD 3

DB5 4

DB4 5

DB3 6

DB2 7

DB1 8

PIN 1

INDICATOR

AD9744

TOP VIEW

(Not to Scale)

24 FS ADJ

23 REFIO

22 ACOM

21 IOUTA

20 IOUTB

19 ACOM

18 AVDD

17 AVDD

NC = NO CONNECT

Figure 4. 32-Lead LFCSP

Table 5. Pin Function Descriptions

SOIC/TSSOP

Pin No.

LFCSP

Pin No.

Mnemonic

1

27

DB13

2 to 13

28 to 32, DB12 to

1, 2, 4 to 8 DB1

14

9

DB0

15

25

SLEEP

16

N/A

REFLO

17

23

REFIO

18

24

FS ADJ

19

N/A

NC

20

19, 22

ACOM

21

20

IOUTB

22

21

IOUTA

23

N/A

RESERVED

24

17, 18

AVDD

25

16

MODE

N/A

15

CMODE

26

10, 26

DCOM

27

3

DVDD

28

N/A

CLOCK

N/A

12

CLK+

N/A

13

CLK−

N/A

11

CLKVDD

N/A

14

CLKCOM

Description

Most Significant Data Bit (MSB).

Data Bits 12 to 1.

Least Significant Data Bit (LSB).

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

unterminated if not used.

Reference Ground when Internal 1.2 V Reference Used. Connect to ACOM for both internal

and external reference operation modes.

Reference Input/Output. Serves as reference input when using external reference. Serves as

1.2 V reference output when using internal reference. Requires 0.1 µF capacitor to ACOM

when using internal reference.

Full-Scale Current Output Adjust.

No Internal Connection.

Analog Common.

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

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

Reserved. Do not connect to common or supply.

Analog Supply Voltage (3.3 V).

Selects Input Data Format. Connect to DCOM for straight binary, DVDD for twos complement.

Clock Mode Selection. Connect to CLKCOM for single-ended clock receiver (drive CLK+ and

float CLK−). Connect to CLKVDD for differential receiver. Float for PECL receiver (terminations

on-chip).

Digital Common.

Digital Supply Voltage (3.3 V).

Clock Input. Data latched on positive edge of clock.

Differential Clock Input.

Differential Clock Input.

Clock Supply Voltage (3.3 V).

Clock Common.

Rev. B | Page 7 of 32

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