Complete 12-Bit A/D Converters
a
FEATURES Complete Monolithic 12-Bit A/D Converters with
Reference, Clock, and Three-State Output Buffers Industry Stan...
Description
a
FEATURES Complete Monolithic 12-Bit A/D Converters with
Reference, Clock, and Three-State Output Buffers Industry Standard Pinout High Speed Upgrades for AD574A 8- and 16-Bit Microprocessor Interface 8 s (Max) Conversion Time (AD774B) 15 s (Max) Conversion Time (AD674B) ؎5 V, ؎10 V, 0 V–10 V, 0 V–20 V Input Ranges Commercial, Industrial, and Military Temperature
Range Grades MIL-STD-883-Compliant Versions Available
Complete 12-Bit A/D Converters
AD674B /AD774B
FUNCTIONAL BLOCK DIAGRAM
5V SUPPLY VLOGIC
DATA MODE SELECT 12/8
CHIP SELECT CS
BYTE ADDRESS/ SHORT CYCLE A0
READ/CONVERT R/C
1 2 3 4 5
CHIP ENABLE CE 6
12V/15V SUPPLY VCC
10V REFERENCE REF OUT
7 8
ANALOG COMMON AC
9
REFERENCE INPUT REF IN
10
–12V/–15V SUPPLY VEE 11
BIPOLAR OFFSET BIPOFF
12
10V SPAN INPUT 10VIN 13
20V SPAN INPUT 20VIN
14
CONTROL
CLOCK
SAR 12
10V REF
– COMP +
I DAC
MSB
N
Y
3
B B
S T
L E
A T
A
EN
Y OB UB TL PE U
TB
199.95 k⍀
I REF
+ –
DAC
N
VEE
BN UY FB ...
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