AD779 查看數據表（PDF） - Analog Devices
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AD779 Datasheet PDF : 12 Pages
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AD779
Symbol
AGND
AIN
BIPOFF
CS
DGND
DB13–DB0
28-Pin DIP
Pin No.
7
6
10
Type
P
AI
AI
12
DI
14
P
28–15
DO
PIN DESCRIPTION
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
binary output coding. Connect to REFOUT for ± 5 V input
bipolar mode and twos-complement binary output coding.
Chip Select. Active LOW.
Digital Ground.
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.
REFIN
9
REFOUT
8
SC
4
AI
Reference Input. +5 V input gives 10 V full scale range.
AO
+5 V Reference Output. Tied to REFIN for normal operation.
DI
Start Convert. Active LOW.
VCC
11
P
+12 V Analog Power.
VEE
5
P
–12 V Analog Power.
VDD
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
–6–
REV. B
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