Datasheet

AD7661
Rev. 0 | Page 10 of 28
Pin No. Mnemonic Type
1
Description
43 IN AI Primary Analog Input with a Range of 0 V to 2.5 V.
45 TEMP AO Temperature Sensor Voltage Output.
46 REFBUFIN AI/O Reference Input Voltage. The reference output and the reference buffer input.
47 PDREF DI
This pin allows the choice of internal or external voltage referen
ces. When LOW, the on-chip
reference is turned on. When HIGH, the internal reference is switched off and an external reference
must be used.
48 PDBUF DI
This pin allows the choice of buffering an internal or external reference with the internal buffer.
When LOW, the buffer is selected. When HIGH, t
he buffer is switched off.
1
AI = Analog Input; AI/O = Bidirectional Analog; AO = Analog Output; DI = Digital Input; DI/O = Bidirectional Digital; DO = Digital Output; P = Power.