ADM1064

Rev. D | Page 7 of 32

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

NOTES

1. NC = NO CONNECT.

2. THE LFCSP HAS AN EXPOSED PAD ON THE BOTTOM.

THIS PAD IS A NO CONNECT (NC). IF POSSIBLE, THIS

PAD SHOULD BE SOLDERED TO THE BOARD FOR

IMPROVED MECHANICAL STABILITY.

ADM1064

TOP VIEW

(Not to Scale)

40

39

38

37

36

35

34

33

32

31

11

12

13

14

15

16

17

18

19

20

PDO1

30

PDO2

29

PDO3

28

PDO4

27

PDO5

26

PDO6

25

PDO7

24

PDO8

23

PDO9

22

PDO10

21

PIN 1

INDICATOR

NC = NO CONNECT

48

38

46

39

45 44

47

43 42

37

41 40

Figure 3. LFCSP Pin Configuration

13 14 15 16 17 18 19 20 21 22 23 24

NC

36

PDO1

35

PDO2

34

PDO3

33

PDO4

32

PDO5

31

PDO6

30

PDO7

29

PDO8

28

PDO9

27

PDO10

26

NC

25

ADM1064

TOP VIEW

(Not to Scale)

PIN 1

INDICATOR

Figure 4. TQFP Pin Configuration

Table 2. Pin Function Descriptions

Pin No.

LFCSP1

Mnemonic

TQFP

Description

15 to

20

1, 12, 13,

18 to 25,

36, 37, 48

NC

No Connection.

1 to 5

2 to 6

VX1 to VX5

(VXx)

High Impedance Inputs to Supply Fault Detectors. Fault thresholds can be set from 0.573 V to

1.375 V. Alternatively, these pins can be used as general-purpose digital inputs.

6 to 9

7 to 10

VP1 to VP4

(VPx)

Low Voltage Inputs to Supply Fault Detectors. Three input ranges can be set by altering the input

attenuation on a potential divider connected to these pins, the output of which connects to a

supply fault detector. These pins allow thresholds from 2.5 V to 6.0 V, from 1.25 V to 3.00 V, and

from 0.573 V to 1.375 V.

10

11

VH

High Voltage Input to Supply Fault Detectors. Two input ranges can be set by altering the input

attenuation on a potential divider connected to this pin, the output of which connects to a supply

fault detector. This pin allows thresholds from 6.0 V to 14.4 V and from 2.5 V to 6.0 V.

11

14

AGND2

Ground Return for Input Attenuators.

12

15

REFGND

Ground Return for On-Chip Reference Circuits.

13

16

REFIN

Reference Input for ADC. Nominally, 2.048 V. This pin must be driven by a reference voltage.

The on-board reference can be used by connecting the REFOUT pin to the REFIN pin.

14

17

REFOUT2

Reference Output, 2.048 V. Typically connected to REFIN. Note that the capacitor must be

connected between this pin and REFGND. A 10 μF capacitor is recommended for this purpose.

21 to

30

26 to 35

PDO10 to

PDO1

Programmable Output Drivers.

31

38

PDOGND2

Ground Return for Output Drivers.

32

39

VCCP

Central Charge-Pump Voltage of 5.25 V. A reservoir capacitor must be connected between this pin

and GND. A 10 μF capacitor is recommended for this purpose.

33

40

A0

Logic Input. This pin sets the seventh bit of the SMBus interface address.

34

41

A1

Logic Input. This pin sets the sixth bit of the SMBus interface address.

35

42

SCL

SMBus Clock Pin. Bidirectional open drain requires external resistive pull-up.

36

43

SDA

SMBus Data Pin. Bidirectional open drain requires external resistive pull-up.

37

44

AUX2

Auxiliary, Single-Ended ADC Input.