AD9002 Analog Devices, Inc., AD9002 Datasheet - Page 4

• Manufacturer Part Number: AD9002
• Description: High Speed 8-bit Monolithic A/d Converter
• Manufacturer: Analog Devices, Inc.

OVERFLOW INH
ANALOG INPUT
ANALOG INPUT
AD9002
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16–19
20
21, 22
23
24, 25
26
27
28
HYSTERESIS
DIGITAL –V
GROUND
GROUND
GROUND
ANALOG
GROUND
ANALOG
ENCODE
ENCODE
DIGITAL
DIGITAL
REF
+V
–V
REF
REF
MID
S
10
11
12
13
14
1
2
3
4
5
6
7
8
9
Name
DIGITAL GROUND
OVERFLOW INH
HYSTERESIS
+V
ANALOG INPUT
ANALOG GROUND
ENCODE
ENCODE
ANALOG GROUND
ANALOG INPUT
–V
REF
DIGITAL GROUND
DIGITAL –V
D1 (LSB)
D2–D5
DIGITAL GROUND
ANALOG –V
DIGITAL GROUND
D6, D7
D8 (MSB)
OVERFLOW
DIGITAL –V
(Not to Scale)
REF
REF
TOP VIEW
AD9002
DIP
MID
28
27
26
25
24
23
22
21
20
19
18
17
16
15
S
S
S
OVERFLOW
D8(MSB)
D7
D6
DIGITAL –V
DIGITAL
GROUND
ANALOG –V
ANALOG –V
DIGITAL
GROUND
D5
D4
D3
D2
D1(LSB)
S
S
S
Description
One of four digital ground pins. All digital ground pins should be connected together.
OVERFLOW INHIBIT controls the data output polarity for overvoltage inputs.
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. Normally converted to –5.2 V.
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.
Noninverted input of the differential encode input. This pin is driven in conjunction with
ENCODE. Data is latched on the rising edge of the ENCODE signal.
Inverted input of the differential encode input. This pin is driven in conjunction with ENCODE.
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 four digital ground pins. All digital ground pins should be connected together.
One of two negative digital supply pins (nominally –5.2 V). Both digital supply pins should be con-
nected together.
Digital data output.
Digital data output.
One of four digital ground pins. All digital ground pins should be connected together.
One of two negative analog supply pins (nominally –5.2 V). Both analog supply pins should be con-
nected together.
One of four digital ground pins. All digital ground pins should be connected together.
Digital data output.
Digital data output.
Overflow data output. Logic high indicates an input overvoltage (V
INHIBIT is enabled (overflow enabled, –5.2 V). See OVERFLOW INHIBIT.
One of two negative digital supply pins (nominally –5.2 V). Both digital supply pins should be
connected together.
A
V
V
ANALOG INPUT
ANALOG INPUT
I
I
n
N
N
a
>
o l
GROUND
GROUND
+
ANALOG
ENCODE
ENCODE
ANALOG
+
g
V
V
–V
n I
R
R
REF
E
E
FUNCTIONAL DESCRIPTION
p
F
F
t u
10
11
5
6
7
8
9
PIN DESIGNATIONS
12 13 14 15 16 17 18
4
O
(
f o
1
0
3
F
(Not to Scale)
v
LCC
TOP VIEW
o l
AD9002
0
X
2
D
e
f r
t a
– 1
–4–
1
X
0
o l
n i
D
28 27
w
g
X
8
0
E
o
r
X
26
n
0
a
5 –
b
X
0
2 .
e l
25
24
23
22
21
20
19
d
V
X
0
D7
D6
DIGITAL
GROUND
ANALOG –V
ANALOG –V
DIGITAL
GROUND
D 5
)
X
0
X
0
S
S
OVERFLOW INH
O
f o
0
0
HYSTERESIS
DIGITAL –V
OVERFLOW
v
1
X
D
e
GROUND
D8(MSB)
DIGITAL
f r
– 1
+V
X
1
o l
D
REF
IN
w
X
8
S
1
> +V
n I
26
27
28
1
2
3
4
X
1
i h
25 24 23 22 21 20 19
5
i b
REF
1
X
6
e t
JLCC
(Not to Scale)
TOP VIEW
) if OVERFLOW
(Not to Scale)
X
1
AD9002
TOP VIEW
d
7
(
8
G
X
1
N
9
X
D
1
10 11
)
REV. D
18
17
16
15
14
13
12
D4
D3
D2
D1(LSB)
DIGITAL –V
DIGITAL
GROUND
REF
MID
S