DAC7741

5

SBAS248A

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LQFP

PIN CONFIGURATION

PIN

NAME

DESCRIPTION

1

NC

No Connection

Negative Analog Power Supply.

Positive Analog Power Supply.

drive external devices. Internally, this pin

directly drives the DAC circuitry.

Offsetting Resistor

6

AGND

Analog ground (Must be tied to analog ground)

7

AGND

Analog ground (Must be tied to analog ground)

8

RFB2

Feedback Resistor 2, used to configure DAC

output range.

9

RFB1

Feedback Resistor 1, used to configure DAC

output range.

10

SJ

Summing Junction of the Output Amplifier

11

DAC Voltage Output

12

NC

No Connection

13

NC

No Connection

14

NC

No Connection

15

NC

No Connection

16

DB0

Data Bit 0 (LSB)

17

DB1

Data Bit 1

18

DB2

Data Bit 2

19

DB3

Data Bit 3

20

DB4

Data Bit 4

21

DB5

Data Bit 5

22

DB6

Data Bit 6

23

NC

No Connection

24

NC

No Connection

25

NC

No Connection

26

TEST

Reserved, Connect to DGND

27

DB7

Data Bit 7

PIN DESCRIPTIONS

36

35

34

33

32

31

30

29

28

27

26

25

NC

DB15

DB14

DB13

DB12

DB11

DB10

DB9

DB8

DB7

TEST

NC

1

2

3

4

5

6

7

8

9

10

11

12

NC

V

SS

V

CC

V

REF

R

OFFSET

AGND

AGND

RFB2

RFB1

SJ

V

OUT

NC

48

47

46

45

44

43

42

41

40

39

38

13

14

15

16

17

18

19

20

21

22

23

37

24

DAC7741

28

DB8

Data Bit 8

29

DB9

Data Bit 9

30

DB10

Data Bit 10

31

DB11

Data Bit 11

32

DB12

Data Bit 12

33

DB13

Data Bit 13

34

DB14

Data Bit 14

35

DB15

Data Bit 15 (MSB)

36

NC

No Connection

37

DGND

Digital Ground

38

Digital Power Supply

39

RST

RSTSEL, the DAC register is either reset to mid-

scale or min-scale.

40

LDAC

DAC register load control, rising edge triggered.

Data is loaded from the input register to the DAC

register.

41

CS

Chip Select, active LOW

42

R/W

Enabled by CS, controls data read (HIGH) and

write (LOW) from or to the input register.

43

RSTSEL

Reset Select; determines the action of RST. If

HIGH, RST will reset the DAC register to mid-

scale. If LOW, RST will reset the DAC register to

min-scale.

44

REFEN

LOW.

45

Internal Reference Output

46

REFADJ

Internal Reference Trim. (Acts as a gain

adjustment input when the internal reference is

used.)

47

Reference Input

48

NC

No Connection

PIN

NAME

DESCRIPTION