REV. A

–6–

AD5520

PIN CONFIGURATION

64-Lead LQFP

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

AD5520

(Not to Scale)

CPL

CPH

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

NC = NO CONNECT

CPOH

CPOL

CPCK

DGND

CLHDETECT

QM4

QM5

MOE

AC0

AC1

MEASVL

GUARD(NC)

MEASVH

MEASIL

MEASI0H

FOH0

MEASI1H

FOH1

MEASI2H

FOH2

MEASI3H

FOH3

MEASI4H

MEASI5H

CLLDETECT

CS

STB

PIN FUNCTION DESCRIPTIONS

Pin No.

Mnemonic

Description

1

CPH

Upper Comparator Threshold Voltage Input, CPH > CPL.

2

CPL

Lower Comparator Threshold Voltage Input, CPL < CPH.

3, 18

Digital Supply Voltage.

4

CPOH

Logic Output. When high, indicates MEASVOUT or MEASIOUT > CPH.

5

CPOL

Logic Output. When high, indicates MEASVOUT or MEASIOUT < CPL.

6CPCK

Logic Input. Used to initiate comparator sampling and update CPOH and CPOL.

7, 17

DGND

Digital Ground.

8

CLHDETECT

Logic Output. When high, indicates upper clamp active. For details, see the Clamp Function section.

9

CLLDETECT

Logic Output. When high, indicates lower clamp active. For details, see the Clamp Function section.

10

QM4

Logic Output. When high, indicates current range Mode 4 is enabled. May be used to drive external

relay or switch. For details, see the High Current Ranges section.

11

QM5

Logic Output. When high, indicates current range Mode 5 is enabled. May be used to drive external

relay or switch. For details, see the High Current Ranges section.

12

MOE

Active Low MEASOUT Enable.

13

CS

Active Low Logic Input. The device is selected when this pin is low. For details, see the Interface

section.

14

STB

Active Low Logic Input. Used in conjunction with CPCK and

CS to configure the device for differ-

ent configurations. Rising edge of

STB triggers sequence inputs. For details, see the Interface section.

15

AC0

Logic Input. Used in conjunction with AC1 to select one of three external compensation capacitors.

For details, see the Force Control Amplifier section.

16

AC1

Logic Input. Used in conjunction with AC0 to select one of three external compensation capacitors.

For details, see the Force Control Amplifier section.