Datasheet

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).