Datasheet

AD779
–6–
REV. B
PIN DESCRIPTION
28-Pin DIP
Symbol Pin No. Type Name and Function
AGND 7 P Analog Ground. This is the ground return for AIN only.
AIN 6 AI Analog Signal Input.
BIPOFF 10 AI Bipolar Offset. Connect to AGND for +10 V input unipolar mode and straight
binary output coding. Connect to REF
OUT
for ±5 V input
bipolar mode and twos-complement binary output coding.
CS 12 DI Chip Select. Active LOW.
DGND 14 P Digital Ground.
DB13–DB0 28–15 DO Data Bits. These pins provide all 14 bits in one 14 bit parallel output.
Active HIGH.
EOC 2 DO End-of-Convert. EOC goes LOW when a conversion starts and goes HIGH
when the conversion is finished. EOC is a three-state output. See
EOCEN pin for information on EOC gating.
EOCEN 13 DI End-of-Convert Enable. Enables EOC pin. Active LOW.
OE 3 DI Output Enable. A down-going transition on OE enables data bits.
Active LOW.
REF
IN
9 AI Reference Input. +5 V input gives 10 V full scale range.
REF
OUT
8 AO +5 V Reference Output. Tied to REF
IN
for normal operation.
SC 4 DI Start Convert. Active LOW.
V
CC
11 P +12 V Analog Power.
V
EE
5 P –12 V Analog Power.
V
DD
1 P +5 V Digital Power.
Type: AI = Analog Input.
AO = Analog Output.
DI = Digital Input.
DO = Digital Output. All DO pins are three-state drivers.
P = Power.
PIN CONFIGURATION
DIP Package