PRELIMINARY TECHNICAL DATA

REV. PrF 09/2003

AD5380

–11–

AD5380 (40-CHANNEL, 14-BIT)

PIN CONFIGURATIONS

AD5380 PIN FUNCTION DESCRIPTIONS

Mnemonic

Function

VOUTX

Buffered analog outputs for channel X. Each analog output is driven by a rail to rail output

amplifier operating at a gain of 2. Each output is capable of driving an output load of 5k to

ground. Typical output impedance is 0.5 ohms.

SIGNAL_GND(1-5)

Analog ground reference points for each group of 8 output channels. All signal_gnd pins are

tied together internally and should be connected to AGND plane as close as possible to the

AD5380.

DAC-GND (1-5)

Each group of 8 channels contains a DAC_GND pin. This is the ground reference point for

the internal 14-bit DACs.These pins shound be connected to the AGND plane.

AGND (1-5)

Analog Ground reference point. Each group of 8 channels contains an AGND pin. All

AGND pins should be connected externally to the AGND plane.

AVDD (1-5)

Analog Supply pins. Each group of 8 channels has a separate AVDD pin. These pins should

be decoupled with 0.1uF ceramic capacitors and 10uF tantalum capacitors. Operating range

for the ASD5380-5 is 4.5V to 5.5V and for the AD5380-3 is 2.7V to 3.6V

DGND

Ground for all digital circuitry.

DVDD

Logic Power Supply; Guaranteed operating range is 2.7 V to 5.5 V. Recommended that

these pins be decoupled with 0.1uF ceramic and 10uF tantalum capacitors to DGND.

REF-GND

Ground Reference point for the internal reference.

REFOUT/REFIN

The AD5380 contains a common REFOUT/REF IN pin. When the internal reference is

selected this pin is the reference output. If the application necessitates the use of an external

reference, it can be applied to this pin and the internal reference disabled vis the control

register. The default for this pin is a reference input.

5

4

3

2

7

6

9

8

1

11

10

16

15

14

13

18

17

20

19

22

21

12

24

23

25

FIFO EN

CLR

VOUT 24

VOUT 25

VOUT 26

VOUT 27

SIGNAL_GND4

DAC_GND4

AGND4

AVDD4

VOUT 28

VOUT 29

VOUT 30

VOUT 31

REF GND

REFOUT/REFIN

SIGNAL_GND1

DAC_GND1

AVDD1

VOUT 0

VOUT 1

VOUT 2

VOUT 3

VOUT 4

AGND1

74

75

72

73

70

71

65

66

67

68

63

64

61

62

59

60

69

57

58

55

56

53

54

51

52

RESET

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

REG0

REG1

VOUT 23

VOUT 22

VOUT 21

VOUT 20

AVDD3

AGND3

DAC_GND3

SIGNAL_GND3

VOUT 19

VOUT 18

VOUT 17

VOUT 16

AVDD2

AGND2

PIN 1

IDENTIFIER

TOP VIEW

(Not to Scale)

AD5380