Datasheet

AD625A/J/S AD625B/K AD625C
Model Min Typ Max Min Typ Max Min Typ Max Unit
GAIN
Gain Equation
2 R
F
R
G
+ 1
2 R
F
R
G
+ 1
2 R
F
R
G
+ 1
Gain Range 1 10,000 1 10,000 1 110,000
Gain Error
1
±.035  0.05 ±0.02  0.03 ±0.01  0.02 %
Nonlinearity, Gain = 1-256 ±0.005 ±0.002 ±0.001 %
Gain>256 ±0.01 ±0.008 ±0.005 %
Gain vs. Temp. Gain<1000
1
5 5 5 ppm/°C
GAIN SENSE INPUT
Gain Sense Current 300 500 150 250 50 100 nA
vs. Temperature 5 20 2 15 2 10 nA/°C
Gain Sense Offset Current 150 500 75 250 50 100 nA
vs. Temperature 2 15 1 10 2 10 nA/°C
VOLTAGE OFFSET (May be Nulled)
Input Offset Voltage 50 200 25 50 10 25 µV
vs. Temperature 1 2/2 0.25 0.50/1 0.1 0.25 µV/°C
Output Offset Voltage 4 5 2 3 1 2 mV
vs. Temperature 20 50/50 10 25/40 10 15 µV/°C
Offset Referred to the
Input vs. Supply
G = 1 70 75 75 85 80 90 dB
G = 10 85 95 90 100 95 105 dB
G = 100 95 100 105 110 110 120 dB
G = 1000 100 110 110 120 115 140 dB
INPUT CURRENT
Input Bias Current ±30
 50 ±20  25 ±10  15 nA
vs. Temperature ±50 ±50 ± 50 pA/°C
Input Offset Current ±2
 35 ±1  15 ±1  5 nA
vs. Temperature ±20 ±20 ± 20 pA/°C
INPUT
Input Impedance
Differential Resistance 1 1 1 GΩ
Differential Capacitance 4 4 4 pF
Common-Mode Resistance 1 1 1 GΩ
Common-Mode Capacitance 4 4 4 pF
Input Voltage Range
Differ. Input Linear (V
DL
)
2
±10 ±10 ± 10 V
Common-Mode Linear (V
CM
)
12 V –
G
2
×V
D
(
)
12 V –
G
2
×V
D
(
)
12 V –
G
2
×V
D
(
)
Common-Mode Rejection Ratio dc to
60 Hz with 1 kΩ Source Imbalance
G = 1 70 75 75 85 80 90 dB
G = 10 90 95 90 105 100 115 dB
G = 100 100 105 105 115 110 125 dB
G = 1000 110 115 110 125 120 140 dB
OUTPUT RATING ±10 V ±10 V ±10 V
@ 5 mA @ 5 mA @ 5 mA
DYNAMIC RESPONSE
Small Signal –3 dB
G = 1 (R
F
= 20 kΩ) 650 650 650 kHz
G = 10 400 400 400 kHz
G = 100 150 150 150 kHz
G = 1000 25 25 25 kHz
Slew Rate 5.0 5.0 5.0 V/µs
Settling Time to 0.01%, 20 V Step
G = 1 to 200 15 15 15 µs
G = 500 35 35 35 µs
G = 1000 75 75 75 µs
AD625–SPECIFICATIONS
(typical @ V
S
= 15 V, R
L
= 2 k and T
A
= + 25C, unless otherwise noted)
REV. D
–2–