Datasheet

AD628
Rev. G | Page 3 of 20
SPECIFICATIONS
T
A
= 25°C, V
S
= ±15 V, R
L
= 2 kΩ, R
EXT1
= 10 kΩ, R
EXT2
= ∞, V
REF
= 0 V, unless otherwise noted.
Table 1.
AD628AR AD628ARM
Parameter Conditions Min Typ Max Min Typ Max Unit
DIFFERENTIAL AND OUTPUT AMPLIFIER
Gain Equation G = +0.1 (1 + R
EXT1
/R
EXT2
) V/V
Gain Range See Figure 29 0.1
1
100 0.1
1
100 V/V
Offset Voltage
V
CM
= 0 V; RTI of input pins
2
;
output amplifier G = +1
−1.5 +1.5 −1.5 +1.5 mV
vs. Temperature 4 8 4 8 μV/°C
CMRR
3
RTI of input pins;
G = +0.1 to +100
75 75 dB
500 Hz 75 75 dB
Minimum CMRR Over Temperature −40°C to +85°C 70 70 dB
vs. Temperature 1 4 1 4 (μV/V)/°C
PSRR (RTI) V
S
= ±10 V to ±18 V 77 94 77 94 dB
Input Voltage Range
Common Mode −120 +120 −120 +120 V
Differential −120 +120 −120 +120 V
Dynamic Response
Small Signal Bandwidth −3 dB G = +0.1 600 600 kHz
Full Power Bandwidth 5 5 kHz
Settling Time G = +0.1, to 0.01%, 100 V step 40 40 μs
Slew Rate 0.3 0.3 V/μs
Noise (RTI)
Spectral Density 1 kHz 300 300 nV/√Hz
0.1 Hz to 10 Hz 15 15 μV p-p
DIFFERENTIAL AMPLIFIER
Gain 0.1 0.1 V/V
Error −0.1 +0.01 +0.1 −0.1 +0.01 +0.1 %
vs. Temperature 5 5 ppm/°C
Nonlinearity 5 5 ppm
vs. Temperature 3 10 3 10 ppm
Offset Voltage RTI of input pins −1.5 +1.5 −1.5 +1.5 mV
vs. Temperature 8 8 μV/°C
Input Impedance
Differential 220 220 kΩ
Common Mode 55 55 kΩ
CMRR
4
RTI of input pins;
G = +0.1 to +100
75 75 dB
500 Hz 75 75 dB
Minimum CMRR Over Temperature −40°C to +85°C 70 70 dB
vs. Temperature 1 4 1 4 (μV/V)/°C
Output Resistance 10 10 kΩ
Error −0.1 +0.1 −0.1 +0.1 %