AD8280

Rev. C | Page 7 of 24

Pin No.

Mnemonic

Description

28

SEL1

Digital Select Pin 1. Used with SEL0 to select channels to be used (see Table 5).

29

SEL0

Digital Select Pin 0. Used with SEL1 to select channels to be used (see Table 5).

30

DGT1

Digital Select Pin 1. Used with DGT0 and DGT2 to select deglitch time (see Table 7).

31

DGT0

Digital Select Pin 0. Used with DGT1 and DGT2 to select deglitch time (see Table 7).

32

ALRMSEL

Selects three separate alarms or one shared alarm. When ALRMSEL is logic high, three separate alarms are

selected; when ALRMSEL is logic low, one shared alarm is selected.

33

NPTC

Selects NTC or PTC thermistor for VTx inputs. When NPTC is tied to logic high (LDO pin), a PTC thermistor is

selected; when NPTC is tied to logic low (VBOTx pin), an NTC thermistor is selected.

34

GND2

Ground. Tie to same potential as VBOT1 and VBOT2.

35

GND1

Ground. Tie to same potential as VBOT1 and VBOT2.

36

VCC

Supply Voltage. Tie to LDO.

37

VCCS

Supply Voltage Sense. Tie to LDO.

38

LDO

LDO Output. Tie to VCC, VCCS, and LDOS.

39

LDOS

LDO Output Sense. Tie to LDO.

40

FB

Feedback Pin. Tie to REF.

41

REF

Reference Output. Tie to FB.

42

ENBO

Enable Output.

43

AIINOT

Alarm Current Input, Overtemperature. Used in daisy-chain configuration.

44

AIINUV

Alarm Current Input, Undervoltage. Used in daisy-chain configuration.

45

AIINOV

Alarm Current Input, Overvoltage. Used in daisy-chain configuration.

46

TESTO

Test Output.

47

BOT

Used to identify part at lowest potential in daisy chain (see Table 6).

48

TOP

Used to identify part at highest potential in daisy chain (see Table 6).