AD9012SQ AD [Analog Devices], AD9012SQ Datasheet - Page 4

• Manufacturer Part Number: AD9012SQ
• Description: High Speed 8-Bit TTL A/D Converter
• Manufacturer: AD [Analog Devices]

Pin #
11
12
13
14
15
16
17
18
19
10
11
12
13
14
15
16–19
20
21, 22
23
24, 25
26
27
28
AD9012
Name
DIGITAL +V
OVERFLOW INH
+V
ANALOG INPUT
ANALOG GROUND
ENCODE
DIGITAL +V
ANALOG GROUND
ANALOG INPUT
–V
REF
DIGITAL +V
DIGITAL –V
D
D
DIGITAL GROUND
ANALOG –V
DIGITAL GROUND
D
D
OVERFLOW
DIGITAL –V
HYSTERESIS
1
2
6
8
REF
–D
, D
REF
(LSB)
(MSB)
MID
5
7
ANALOG GROUND
ANALOG GROUND
OVERFLOW INH
ANALOG INPUT
ANALOG INPUT
HYSTERESIS
DIGITAL V
DIGITAL V
DIGITAL V
DIGITAL V
S
S
S
ENCODE
S
S
S
REF
+V
–V
REF
REF
MID
S
S
S
S
+
+
–
+
10
11
12
13
14
1
2
3
4
5
6
7
8
9
(Not to Scale)
TOP VIEW
ANALOG
INPUT
V
V
AD9012
Description
One of three positive digital supply pins (nominally +5.0 V).
OVERFLOW INHIBIT controls the data output coding for overvoltage inputs (AIN + V
The Hysteresis control voltage varies the comparator hysteresis from 0 mV to 10 mV, for a
change from –5.2 V to –2.2 V at the Hysteresis control pin.
The most positive reference voltage for the internal resistor ladder.
One of two analog input pins. Both analog input pins should be connected together.
One of two analog ground pins. Both analog ground pins should be connected together.
TTL level encode command input. ENCODE is rising edge sensitive.
One of three positive digital supply pins (nominally +5.0 V).
One of two analog ground pins. Both analog ground pins should be connected together.
One of two analog input pins. Both analog inputs should be connected together.
The most negative reference voltage for the internal resistor ladder.
The midpoint tap on the internal resistor ladder.
One of three positive digital supply pins (nominally +5.0 V).
One of two negative digital supply pins (nominally –5.2 V). Both digital supply pins should be
connected together.
Digital data output. D
Digital data output.
One of two digital ground pins. Both digital grounds pins should be connected together.
One of two negative analog supply pins (nominally –5.2 V). Both analog supply pins should be
connected together.
One of two digital ground pins. Both digital ground pins should be connected together.
Digital data output.
Digital data output D
Overflow data output. Logic HIGH indicates an input overvoltage (V
OVERFLOW INHIBIT is enabled (overflow enabled, floating). See OVERFLOW INHIBIT.
One of two negative digital supply pins (nominally –5.2 V). Both digital supply pins should be
connected together.
IN
IN
< + V
+ V
28
27
26
25
24
23
22
21
20
19
18
17
16
15
REF
REF
DIGITAL V
OVERFLOW
D
D
D
DIGITAL GROUND
ANALOG V
ANALOG V
DIGITAL GROUND
D
D
D
D
D
8
6
5
4
3
2
1
7
PIN FUNCTION DESCRIPTIONS
(MSB)
(LSB)
OVERFLOW ENABLED (FLOATING)
OF D
1
0
PIN CONFIGURATIONS
S
S
S
–
0 0 0 0 0
X X X X X X X X
–
–
l
8
1
D
(MSB) is the most significant bit of the digital output word.
(LSB) is the least significant bit of the digital output word.
2
D
3
D
–4–
4
D
5
ANALOG GROUND
ANALOG GROUND
D
0 0 0
ANALOG INPUT
ANALOG INPUT
6
D
DIGITAL V
7
ENCODE
D
8
–V
REF
S
+
10
11
5
6
7
8
9
12 13 14 15 16 17 18
4
3
(Not to Scale)
TOP VIEW
AD9012
2
OVERFLOW INHIBITED (GND)
OF D
0
0
1
28 27
1 1 1 1 1
X X X X X X X X
l
D
26
IN
2
D
> + V
3
25
24
23
22
21
20
19
D
D
D
DIGITAL GROUND
DIGITAL GROUND
D
ANALOG V
ANALOG V
4
6
5
7
D
REF
5
), if
D
1 1 1
6
D
S
S
–
–
7
D
8
REV. D
REF
).