AD779 Analog Devices, AD779 Datasheet - Page 6

• Manufacturer Part Number: AD779
• Description: 14-Bit 128 kSPS Complete Sampling ADC
• Manufacturer: Analog Devices

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