AD9745 データシートの表示（PDF） - Analog Devices

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AD9745

Dual 8-/10-/12-/14-/16-Bit 250 MSPS Digital-to-Analog Converters

Analog Devices 

AD9741/AD9743/AD9745/AD9746/AD9747

CVDD18 1

CVSS 2

CLKP 3

CLKN 4

CVSS 5

CVDD18 6

DVSS 7

DVDD18 8

P1D9 9

P1D8 10

P1D7 11

P1D6 12

P1D5 13

P1D4 14

P1D3 15

P1D2 16

P1D1 17

P1D0 18

NC = NO CONNECT

PIN 1

INDICATOR

AD9743

(TOP VIEW)

54 FSADJ

53 RESET

52 CSB

51 SCLK

50 SDIO

49 SDO

48 DVSS

47 DVDD18

46 NC

45 NC

44 NC

43 NC

42 NC

41 NC

40 P2D0

39 P2D1

38 P2D2

37 P2D3

Figure 3. AD9743 Pin Configuration

Table 9. AD 9743 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 18

P1D<9:0> Port 1 Data Bit Inputs.

19 to 24, 26, 30, 41 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 40

P2D<9:0> 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 a 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.

Rev. 0 | Page 10 of 28

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