ADS5240

SBAS326E – JUNE 2004 – REVISED JANUARY 2009 ...................................................................................................................................................... www.ti.com

PIN DESCRIPTIONS

NAME

PIN #

I/O

DESCRIPTION

ADCLK

56

I

Data Converter Clock Input

ADCLKN

34

O

Negative LVDS ADC Clock Output

ADCLKP

33

O

Positive LVDS ADC Clock Output

AVDD

1, 5, 10, 39, 44, 48, 55, 60

I

Analog Power Supply

AVSS

4, 6, 9, 40, 43, 45, 49, 57-59, 64

I

Analog Ground

CS

61

I

Chip-Select; 0 = Select, 1 = No Select

IN1N

3

I

Channel 1 Differential Analog Input Low

IN1P

2

I

Channel 1 Differential Analog Input High

IN2N

8

I

Channel 2 Differential Analog Input Low

IN2P

7

I

Channel 2 Differential Analog Input High

IN3N

42

I

Channel 3 Differential Analog Input Low

IN3P

41

I

Channel 3 Differential Analog Input High

IN4N

47

I

Channel 4 Differential Analog Input Low

IN4P

46

I

Channel 4 Differential Analog Input High

INT/EXT

54

I

Internal/External Reference Select; 0 = External, 1 = Internal. Weak pull-up to supply.

ISET

50

I/O

Bias Current Setting Resistor of 56.2k

Ω to Ground

LCLKN

16

O

Negative LVDS Clock

LCLKP

15

O

Positive LVDS Clock

LVDD

21, 27

I

LVDS Power Supply

LVSS

11, 13, 14, 22, 28, 35, 36, 38

I

LVDS Ground

NC

17, 18, 31, 32

—

No Connection

OUT1N

20

O

Channel 1 Negative LVDS Data Output

OUT1P

19

O

Channel 1 Positive LVDS Data Output

OUT2N

24

O

Channel 2 Negative LVDS Data Output

OUT2P

23

O

Channel 2 Positive LVDS Data Output

OUT3N

26

O

Channel 3 Negative LVDS Data Output

OUT3P

25

O

Channel 3 Positive LVDS Data Output

OUT4N

30

O

Channel 4 Negative LVDS Data Output

OUT4P

29

O

Channel 4 Positive LVDS Data Output

PD

12

I

Power-Down; 0 = Normal, 1 = Power-Down. Weak pull-down to ground.

REFB

52

I/O

Reference Bottom Voltage (2

Ω resistor in series with a capacitor ≥ 0.1

µF to ground)

REFT

53

I/O

Reference Top Voltage (2

Ω resistor in series with a capacitor ≥ 0.1

µF to ground)

RESET

37

I

Reset to Default; 0 = Reset, 1 = Normal. Weak pull-down to ground.

SCLK

63

I

Serial Data Clock

SDATA

62

I

Serial Data Input

VCM

51

O

Common-Mode Output Voltage

12

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