AD8283

Data Sheet

Rev. C | Page 8 of 27

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

NC

DSYNC

PDWN

DVDD18

SCLK

SDIO

CS

AUX

MUXA

ZSEL

TEST1

TEST2

DVDD33SPI

AVDD18

AVDD33A

INA–

17

INA+

18

NC

54

53

52

51

50

49

48

47

46

45

44

43

42

41

40

39

38

37

NC

TEST4

DVDD18CLK

CLK+

CLK–

DVDD33CLK

AVDD33REF

VREF

RBIAS

BAND

APOUT

ANOUT

TEST3

AVDD18ADC

AVDD18

INADC+

INADC–

NC

NOTES

1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.

2. THE EXPOSED PADDLE SHOULD BE TIED TO ANALOG/DIGITAL GROUND PLANE.

PIN 1

INDICATOR

AD8283

(TOP VIEW)

Figure 3.

Table 6. Pin Function Descriptions

Pin No.

Name

Description

0

GND

Ground. Exposed paddle on the bottom side; should be tied to the analog/digital ground plane.

1

NC

No Connection. Pin can be tiedto any potential.

2

DSYNC

Data Out Synchronization.

3

PDWN

Full Power-Down. Logic high overrides SPI and powers down the part, logic low allows selectionthrough SPI.

4

DVDD18

1.8 V Digital Supply.

5

SCLK

Serial Clock.

6

SDIO

Serial Data Input/Output.

7

CS

Chip Select Bar.

8

AUX

Logic high forces to Channel ADC (INADC+/INADC−); AUX has a higher priority than MUXA.

9

MUXA

Logic high forces to Channel A unless AUX is asserted.

10

ZSEL

Input Impedance Select. Logic high overrides SPI and sets it to 200 kΩ; logic low allows selectionthrough SPI.

11

TEST1

Pin should not be used; tie to ground.

12

TEST2

Pin should not be used; tie to ground.

13

DVDD33SPI

3.3 V Digital Supply, SPI Port.

14

AVDD18

1.8 V Analog Supply.

15

AVDD33A

3.3 V Analog Supply, Channel A.

16

INA−

Negative LNA Analog Input for Channel A.

17

INA+

Positive LNA Analog Input for Channel A.

18

NC

No Connect. Pin can be tiedto any potential.

19

NC

No Connect. Pin can be tiedto any potential.

20

NC

No Connect. Pin can be tiedto any potential.

21

AVDD33B

3.3 V Analog Supply, Channel B.

22

INB−

Negative LNA Analog Input for Channel B.

23

INB+

Positive LNA Analog Input for Channel B.

24

AVDD33C

3.3 V Analog Supply, Channel C.

25

INC−

Negative LNA Analog Input for Channel C.

26

INC+

Positive LNA Analog Input for Channel C.