AD9854AST View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

AD9854AST

CMOS 300 MSPS Quadrature Complete DDS

Analog Devices 

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

AD9854

80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61

D7 1

D6 2

D5 3

D4 4

D3 5

D2 6

D1 7

D0 8

DVDD 9

DVDD 10

DGND 11

DGND 12

NC 13

A5 14

A4 15

A3 16

A2/IO RESET 17

A1/SDO 18

A0/SDIO 19

I/O UD CLK 20

PIN 1

INDICATOR

AD9854

TOP VIEW

(Not to Scale)

60 AVDD

59 AGND

58 NC

57 NC

56 DAC RSET

55 DACBP

54 AVDD

53 AGND

52 IOUT2

51 IOUT2

50 AVDD

49 IOUT1

48 IOUT1

47 AGND

46 AGND

45 AGND

44 AVDD

43 VINN

42 VINP

41 AGND

21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

NC = NO CONNECT

Figure 2. Pin Configuration

Table 4. Pin Function Descriptions

Pin No.

Mnemonic

1 to 8

D7 to D0

9, 10, 23, 24, 25,

73, 74, 79, 80

DVDD

11, 12, 26, 27, 28, DGND

72, 75 to 78

13, 35, 57, 58, 63 NC

14 to 16

A5 to A3

17

A2/IO RESET

18

A1/SDO

19

A0/SDIO

Description

8-Bit Bidirectional Parallel Programming Data Inputs. Used only in parallel programming mode.

Connections for the Digital Circuitry Supply Voltage. Nominally 3.3 V more positive than AGND

and DGND.

Connections for the Digital Circuitry Ground Return. Same potential as AGND.

No Internal Connection.

Parallel Address Inputs for Program Registers (Part of 6-Bit Parallel Address Inputs for Program

Register, A5:A0). Used only in parallel programming mode.

Parallel Address Input for Program Registers (Part of 6-Bit Parallel Address Inputs for Program

Register, A5:A0)/IO Reset. A2 is used only in parallel programming mode. IO RESET is used when

the serial programming mode is selected, allowing an IO RESET of the serial communication bus

that is unresponsive due to improper programming protocol. Resetting the serial bus in this

manner does not affect previous programming, nor does it invoke the default programming

values listed in Table 8. Active high.

Parallel Address Input for Program Registers (Part of 6-Bit Parallel Address Inputs for Program

Register, A5:A0)/Unidirectional Serial Data Output. A1 is used only in parallel programming

mode. SDO is used in 3-wire serial communication mode when the serial programming mode is

selected.

Parallel Address Input for Program Registers (Part of 6-Bit Parallel Address Inputs for Program

Register, A5:A0)/Bidirectional Serial Data I/O. A0 is used only in parallel programming mode. SDIO

is used in 2-wire serial communication mode.

Rev. E | Page 9 of 52

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