AD671
ACOM
22
20
12
11–2
1
P
Analog Ground.
VEE
BIT12 (LSB)
BIT11
BIT10
BIT9
24
1
2
AIN
AI
Analog Input Signal.
Most Significant Bit.
Data Bits 2–11.
23 VCC
BIT1 (MSB)
BIT2–BIT11
BIT12 (LSB)
BPO/UPO
DO
DO
DO
AI
ACOM
22
21
20
19
18
17
3
BPO/UPO
AIN
4
Least Significant Bit.
BIT8
5
21
Bipolar or Unipolar
BIT7
AD671
TOP VIEW
(Not to Scale)
REF IN
DCOM
VLOGIC
6
Configuration Pin. Connect to
AIN for 0 V to +5 V Span, to
ACOM for 0 V to +10 V Span
and to REF IN for –5 V to
+5 V Span.
BIT6
BIT5
BIT4
BIT3
7
8
9
16 ENCODE
DAV
OTR
MSB
10
11
12
15
14
13
DAV
15
DO
Data Available Output. The
Rising Edge of DAV Indicates
an End of Conversion and Can
Be Used to Latch Current
Data into an External
BIT2
BIT1 (MSB)
Register. The Falling Edge of
DAV Can Be Used to Latch
Previous Data into an External
Register.
DCOM
18
16
P
Digital Ground.
ENCODE
DI
The AD671 Starts a
Conversion on the Rising
Edge of the ENCODE Pulse.
MSB
13
14
DO
DO
Inverted Most Significant Bit.
Provides Twos Complement
Output Data Format.
OTR
Out of Range Is Active HIGH
when the analog input is
beyond the input range of the
converter.
REF IN
VCC
19
23
24
17
AI
P
+5 V Reference Input.
+5 V Analog Power.
–5 V Analog Power.
+5 V Digital Power.
VEE
P
VLOGIC
P
TYPE:
AI = Analog Input
DI = Digital Input
DO = Digital Output
P = Power
–6–
REV. B