AD628
TA = 25°C, VS = 5 V, RL = 2 kΩ, REXT1 = 10 kΩ, REXT2 = ∞, VREF = 2.5 V, unless otherwise noted.
Table 2.
AD628AR
AD628ARM
Parameter
Conditions
Min
Typ
Max
Min
Typ
Max
Unit
DIFFERENTIAL AND OUTPUT AMPLIFIER
Gain Equation
Gain Range
G = +0.1(1+ REXT1/REXT2
See Figure 29
VCM = 2.25 V; RTI of input pins2;
output amplifier G = +1
)
V/V
V/V
mV
0.11
−3.0
100
+3.0
0.11
−3.0
100
+3.0
Offset Voltage
vs. Temperature
CMRR3
6
15
6
15
μV/°C
dB
dB
dB
(μV/V)/°C
dB
RTI of input pins; G = +0.1 to +100
500 Hz
−40°C to +85°C
75
75
70
75
75
70
Minimum CMRR Over Temperature
vs. Temperature
PSRR (RTI)
1
94
4
1
94
4
VS = 4.5 V to 10 V
77
77
Input Voltage Range
Common Mode4
Differential
−12
−15
+17
+15
−12
−15
+17
+15
V
V
Dynamic Response
Small Signal Bandwidth – 3 dB
Full Power Bandwidth
Settling Time
G = +0.1
440
30
15
440
30
15
kHz
kHz
μs
G = +0.1; to 0.01%, 30 V step
Slew Rate
0.3
0.3
V/μs
Noise (RTI)
Spectral Density
1 kHz
0.1 Hz to 10 Hz
350
15
350
15
nV/√Hz
μV p-p
DIFFERENTIAL AMPLIFIER
Gain
0.1
0.1
V/V
Error
–0.1
−2.5
+0.01 +0.1
3
–0.1
−2.5
+0.01 +0.1
3
%
Nonlinearity
vs. Temperature
Offset Voltage
vs. Temperature
Input Impedance
Differential
ppm
ppm
mV
3
10
3
10
RTI of input pins
+2.5
10
+2.5
10
μV/°C
220
55
220
55
kΩ
kΩ
dB
dB
dB
(μV/V)/°C
kΩ
Common Mode
CMRR5
RTI of input pins; G = +0.1 to +100
500 Hz
−40°C to +85°C
75
75
70
75
75
70
Minimum CMRR Over Temperature
vs. Temperature
Output Resistance
Error
1
4
1
4
10
10
−0.1
+0.1
−0.1
+0.1
%
OUTPUT AMPLIFIER
Gain Equation
G = (1 + REXT1/REXT2
)
V/V
Nonlinearity
Output Offset Voltage
vs. Temperature
G = +1, VOUT = 1 V to 4 V
RTI of output amplifier
0.5
0.5
ppm
−0.15
+0.15 −0.15
0.6
4.1
4
+0.15 mV
0.6
4.1
4
μV/°C
V
V
Output Voltage Swing
RL = 10 kΩ
RL = 2 kΩ
0.9
1
0.9
1
Bias Current
Offset Current
CMRR
1.5
0.2
3
0.5
1.5
0.2
3
0.5
nA
nA
dB
dB
VCM = 1 V to 4 V
VOUT = 1 V to 4 V
130
130
130
130
Open-Loop Gain
Rev. G | Page 5 of 20
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