Changes to Ordering Guide .......................................................... 13
2/91—Rev. A to Rev. B
Rev. C | Page 2 of 16
AD708
SPECIFICATIONS
@ 25°C and ±15 V dc, unless otherwise noted.
Table 1.
Parameter
INPUT OFFSET VOLTAGE
2
Drift
Long Term Stability
INPUT BIAS CURRENT
T
MIN
to T
MAX
Average Drift
OFFSET CURRENT
Average Drift
MATCHING CHARACTERISTICS
3
Offset Voltage
T
MIN
to T
MAX
Offset Voltage Drift
Input Bias Current
T
MIN
to T
MAX
Common-Mode Rejection
T
MIN
to T
MAX
Power Supply Rejection
T
MIN
to T
MAX
Channel Separation
INPUT VOLTAGE NOISE
0.1 Hz to 10 Hz
f = 10 Hz
f = 100 Hz
f = 1 kHz
0.1 Hz to 10 Hz
f = 10 Hz
f = 100 Hz
f = 1 kHz
V
CM
= ±13 V
T
MIN
to T
MAX
V
O
= ±10 V
R
LOAD
≥ 2 kΩ
T
MIN
to T
MAX
V
S
= ±3 V to ±18 V
T
MIN
to T
MAX
120
110
110
110
135
140
V
CM
= 0 V
T
MIN
to T
MAX
Conditions
T
MIN
to T
MAX
AD708J/AD708A
Min
1
Typ Max
1
30
100
50
150
0.3
1.0
0.3
1.0
2.5
2.0
4.0
15
40
0.5
2.0
2.0
4.0
2
60
80
150
1.0
4.0
5.0
130
130
120
120
140
0.6
18
13.0
11.0
35
0.9
0.27
0.18
130
130
5
5
120
120
0.5
0.15
140
AD708B
Min
Typ Max
1
5
50
15
65
0.1
0.4
0.3
0.5
1.0
1.0
2.0
10
25
0.1
1.0
0.2
1.5
1
25
1
AD708S
Min
Typ Max
1
5
30
15
50
0.1
0.3
0.3
0.5
1
1.0
4
10
30
0.1
1
0.2
1.5
1
25
1
Unit
μV
μV
μV/°C
μV/month
nA
nA
pA/°C
nA
nA
pA/°C
μV
μV
μV/°C
nA
nA
dB
dB
dB
dB
dB
μV p-p
nV/√Hz
nV/√Hz
nV/√Hz
pA p-p
pA/√Hz
pA/√Hz
pA/√Hz
dB
dB
V/μV
V/μV
dB
dB
MHz
V/μs
MΩ
GΩ
50
75
0.4
1.0
2.0
130
130
120
120
140
0.6
12
11.0
11.0
35
0.8
0.23
0.17
130
130
4
4
120
120
0.5
0.15
140
30
50
0.3
1.0
2.0
INPUT CURRENT NOISE
COMMON-MODE REJECTION RATIO
OPEN-LOOP GAIN
120
120
3
3
110
110
0.5
0.15
0.23
10.3
10.0
9.6
14
0.32
0.14
0.12
140
140
10
10
130
130
0.9
0.3
60
200
0.23
10.3
10.0
9.6
14
0.32
0.14
0.12
140
140
10
10
130
130
0.9
0.3
200
400
0.23
10.3
10.0
9.6
14
0.32
0.14
0.12
140
140
10
7
130
130
0.9
0.3
200
400
0.35
12
11
11
35
0.8
0.23
0.17
POWER SUPPLY REJECTION RATIO
FREQUENCY RESPONSE
Closed-Loop Bandwidth
Slew Rate
INPUT RESISTANCE
Differential
Common Mode
Rev. C | Page 3 of 16
AD708
Parameter
OUTPUT VOLTAGE
Conditions
R
LOAD
≥ 10 kΩ
R
LOAD
≥ 2 kΩ
R
LOAD
≥ 1 kΩ
T
MIN
to T
MAX
AD708J/AD708A
Min
1
Typ Max
1
13.5
14
12.5
13.0
12.0
12.5
12.0
13.0
60
4.5
135
12
±3
5.5
165
18
±18
Min
13.5
12.5
12.0
12.0
1
OPEN-LOOP OUTPUT RESISTANCE
POWER SUPPLY
Quiescent Current
Power Consumption
Operating Range
1
AD708B
Typ Max
1
14.0
13.0
12.5
13.0
60
4.5
135
12
5.5
165
18
±18
Min
13.5
12.5
12.0
12.0
1
AD708S
Typ Max
1
14
13
12.5
13
60
4.5
135
12
5.5
165
18
±18
Unit
±V
±V
±V
±V
Ω
mA
mW
mW
V
V
S
= ±15 V
V
S
= ±3 V
±3
±3
All min and max specifications are guaranteed. Specifications in boldface are tested on all production units at final electrical test. Results from those tests are used to
calculate outgoing quality levels.
2
Input offset voltage specifications are guaranteed after five minutes of operation at T
A
= 25°C.
3
Matching is defined as the difference between parameters of the two amplifiers.
Rev. C | Page 4 of 16
AD708
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Supply Voltage
Internal Power Dissipation
1
Input Voltage
2
Output Short-Circuit Duration
Differential Input Voltage
Storage Temperature Range (Q)
Storage Temperature Range (N)
Lead Temperature (Soldering 60 sec)
1
Rating
±22 V
±V
S
Indefinite
+V
S
and −V
S
−65°C to +150°C
−65°C to +125°C
300°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Thermal Characteristics
8-lead PDIP: θ
JC
= 33°C/W, θ
JA
= 100°C/W
8-lead CERDIP: θ
JC
= 30°C/W, θ
JA
= 110°C/W
2
For supply voltages less than ±22 V, the absolute maximum input voltage is
equal to the supply voltage.
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
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