Datasheet

AD628
Rev. G | Page 4 of 20
AD628AR AD628ARM
Parameter Conditions Min Typ Max Min Typ Max Unit
OUTPUT AMPLIFIER
Gain Equation G = (1 + R
EXT1
/R
EXT2
) V/V
Nonlinearity G = +1, V
OUT
= ±10 V 0.5 0.5 ppm
Offset Voltage RTI of output amp −0.15 +0.15 −0.15 +0.15 mV
vs. Temperature 0.6 0.6 μV/°C
Output Voltage Swing R
L
= 10 kΩ −14.2 +14.1 −14.2 +14.1 V
R
L
= 2 kΩ −13.8 +13.6 −13.8 +13.6 V
Bias Current 1.5 3 1.5 3 nA
Offset Current 0.2 0.5 0.2 0.5 nA
CMRR V
CM
= ±13 V 130 130 dB
Open-Loop Gain V
OUT
= ±13 V 130 130 dB
POWER SUPPLY
Operating Range ±2.25 ±18 ±2.25 ±18 V
Quiescent Current 1.6 1.6 mA
TEMPERATURE RANGE −40 +85 −40 +85 °C
1
To use a lower gain, see the Ga section. in Adjustment
2
The addition of the difference amplifier and output amplifier offset voltage does not exceed this specification.
3
Error due to common mode as seen at the output:
][
10
)(0.1)(
20
75
GainAmplifierOutput
V
CM
OUT
×
⎥
⎥
⎥
⎦
⎤
⎢
⎢
⎢
⎣
⎡
=V
.
4
Error due to common mode as seen at the output of A1:
⎥
⎥
⎥
⎦
⎤
⎢
⎢
⎢
⎣
⎡
=
20
75
10
)(0.1)(
CM
OUT
V
A1
V
.