AD9741/AD9743/AD9745/AD9746/AD9747

Rev. 0 | Page 11 of 28

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

CVDD18

CVSS

CLKP

CLKN

CVSS

CVDD18

DVSS

DVDD18

P1D11

P1D10

P1D9

P1D8

P1D7

P1D6

P1D5

P1D4

17

P1D3

18

P1D2

54

53

52

51

50

49

48

47

46

45

44

43

42

41

40

39

38

37

FSADJ

RESET

CSB

SCLK

SDIO

SDO

DVSS

DVDD18

NC

NC

NC

NC

P2D0

P2D1

P2D2

P2D3

P2D4

P2D5

NC = NO CONNECT

PIN 1

INDICATOR

AD9745

(TOP VIEW)

Figure 4. AD9745 Pin Configuration

Table 10. AD9745 Pin Function Descriptions

Pin No.

Mnemonic

Description

1, 6

CVDD18

Clock Supply Voltage (1.8 V).

2, 5

CVSS

Clock Supply Common (0 V).

3

CLKP

Differential DAC Clock Input.

4

CLKN

Complementary Differential DAC Clock Input.

7, 28, 48

DVSS

Digital Supply Common (0 V).

8, 47

DVDD18

Digital Core Supply Voltage (1.8 V).

9 to 20

P1D<11:0>

Port 1 Data Bit Inputs.

21 to 24, 26, 30, 43 to 46

NC

No Connect.

25

DCO

Data Clock Output. Use to clock data source.

27

DVDD33

Digital I/O Supply Voltage (3.3 V).

29

IQSEL

I/Q Framing Signal for Single-Port Mode Operation.

31 to 42

P2D<11:0>

Port 2 Data Bit Inputs.

49

SDO

Serial Peripheral Interface Data Output.

50

SDIO

Serial Peripheral Interface Data Input and Optional Data Output.

51

SCLK

Serial Peripheral Interface Clock Input.

52

CSB

Serial Peripheral Interface Chip Select Input. Active low.

53

RESET

Hardware Reset. Active high.

54

FSADJ

Full-Scale Current Output Adjust. Connect 10 kΩ resistor to AVSS.

55

REFIO

Reference Input/Output. Connect a 0.1 μF capacitor to AVSS.

56, 57, 71, 72

AVDD33

Analog Supply Voltage (3.3 V).

58, 61, 64, 67, 70

AVSS

Analog Supply Common (0 V).

59

IOUT2P

DAC2 Current Output True. Sources full-scale current when input data bits are all 1.

60

IOUT2N

DAC2 Current Output Complement. Sources full-scale current when data bits are all 0.

62

AUX2P

Auxiliary DAC2 Default Current Output Pin.

63

AUX2N

Auxiliary DAC2 Optional Output Pin. Enable through SPI.

65

AUX1N

Auxiliary DAC1 Optional Output Pin. Enable through SPI.

66

AUX1P

Auxiliary DAC1 Default Current Output Pin.

68

IOUT1N

Complementary DAC1 Current Output. Sources full-scale current when data bits are all 0.

69

IOUT1P

DAC1 Current Output. Sources full-scale current when data bits are all 1.

EPAD

AVSS

Exposed Thermal Pad. Must be soldered to copper pour on top surface of PCB for mechanical

stability and must be electrically tied to low impedance GND plane for low noise performance.