AD708
Rev. C | Page 3 of 16
SPECIFICATIONS
@ 25°C and ±15 V dc, unless otherwise noted.
Table 1.
AD708J/AD708A AD708B AD708S
Parameter Conditions Min
1
Typ Max
1
Min
1
Typ Max
1
Min
1
Typ Max
1
Unit
INPUT OFFSET VOLTAGE
2
30
100
5
50
5
30
μV
T
MIN
to T
MAX
50 150 15 65 15 50 μV
Drift 0.3 1.0 0.1 0.4 0.1 0.3 μV/°C
Long Term Stability 0.3 0.3 0.3 μV/month
INPUT BIAS CURRENT 1.0
2.5
0.5
1.0
0.5
1
nA
T
MIN
to T
MAX
2.0 4.0 1.0
2.0
1.0
4
nA
Average Drift 15 40 10 25 10 30 pA/°C
OFFSET CURRENT V
CM
= 0 V 0.5
2.0
0.1
1.0
0.1
1
nA
T
MIN
to T
MAX
2.0 4.0 0.2 1.5 0.2
1.5
nA
Average Drift 2 60 1 25 1 25 pA/°C
MATCHING CHARACTERISTICS
3
Offset Voltage
80
50
30
μV
T
MIN
to T
MAX
150 75
50
μV
Offset Voltage Drift 1.0 0.4
0.3
μV/°C
Input Bias Current
4.0
1.0
1.0
nA
T
MIN
to T
MAX
5.0 2.0
2.0
nA
Common-Mode Rejection
120
140
130
140
130
140 dB
T
MIN
to T
MAX
110 130
130
dB
Power Supply Rejection
110
120
120
dB
T
MIN
to T
MAX
110 120
120
dB
Channel Separation 135 140 140 dB
INPUT VOLTAGE NOISE 0.1 Hz to 10 Hz 0.23 0.6 0.23 0.6 0.23
0.35
μV p-p
f = 10 Hz 10.3 18 10.3 12 10.3 12 nV/√Hz
f = 100 Hz 10.0 13.0 10.0 11.0 10.0 11 nV/√Hz
f = 1 kHz 9.6 11.0 9.6 11.0 9.6 11 nV/√Hz
INPUT CURRENT NOISE 0.1 Hz to 10 Hz 14 35 14 35 14 35 pA p-p
f = 10 Hz 0.32 0.9 0.32 0.8 0.32 0.8 pA/√Hz
f = 100 Hz 0.14 0.27 0.14 0.23 0.14 0.23 pA/√Hz
f = 1 kHz 0.12 0.18 0.12 0.17 0.12 0.17 pA/√Hz
COMMON-MODE REJECTION RATIO V
CM
= ±13 V
120
140
130
140
130
140 dB
T
MIN
to T
MAX
120 140 130 140
130
140 dB
OPEN-LOOP GAIN V
O
= ±10 V
R
LOAD
≥ 2 kΩ
3
10
5
10
4
10 V/μV
T
MIN
to T
MAX
3 10 5 10
4
7 V/μV
POWER SUPPLY REJECTION RATIO V
S
= ±3 V to ±18 V
110
130
120
130
120
130 dB
T
MIN
to T
MAX
110 130 120 130
120
130 dB
FREQUENCY RESPONSE
Closed-Loop Bandwidth 0.5 0.9 0.5 0.9 0.5 0.9 MHz
Slew Rate 0.15 0.3 0.15 0.3 0.15 0.3 V/μs
INPUT RESISTANCE
Differential 60 200 200 MΩ
Common Mode 200 400 400 GΩ
