Datasheet

Data Sheet AD8232
Rev. A | Page 3 of 28
SPECIFICATIONS
V
S
= 3 V, V
REF
= 1.5 V, V
CM
= 1.5 V, T
A
= 25°C, FR=low, SDN=high, AC/
DC
= low, unless otherwise noted.
Table 1.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
INSTRUMENTATION AMPLIFIER
Common-Mode Rejection Ratio,
DC to 60 Hz
CMRR V
CM
= 0.35 V to 2.85 V, V
DIFF
= 0 V 80 86 dB
V
CM
= 0.35 V to 2.85 V, V
DIFF
= ±0.3 V 80 dB
Power Supply Rejection Ratio PSRR V
S
= 2.0 V to 3.5 V 76 90 dB
Offset Voltage (RTI) V
OS
Instrumentation Amplifier Inputs
3
8
mV
DC Blocking Input
1
5 50 µV
Average Offset Drift
Instrumentation Amplifier Inputs 10 µV/°C
DC Blocking Input
1
0.05 µV/°C
Input Bias Current I
B
50 200 pA
T
A
= 0°C to 70°C 1 nA
Input Offset Current I
OS
25 100 pA
T
A
= 0°C to 70°C 1 nA
Input Impedance
Differential 10||7.5 GΩ||pF
Common Mode 5||15 GΩ||pF
Input Voltage Noise (RTI)
Spectral Noise Density f = 1 kHz 100 nV/√Hz
Peak-to-Peak Voltage Noise f = 0.1 Hz to 10 Hz 12 µV p-p
f = 0.5 Hz to 40 Hz 14 µV p-p
Input Voltage Range T
A
= 0°C to 70°C 0.2 +V
S
V
DC Differential Input Range
V
DIFF
−300
+300
mV
Output
Output Swing R
L
= 50 kΩ 0.1 +V
S
− 0.1 V
Short-Circuit Current I
OUT
6.3 mA
Gain A
V
100 V/V
Gain Error V
DIFF
= 0 V 0.4 %
V
DIFF
= −300 mV to +300 mV 1 3.5 %
Average Gain Drift T
A
= 0°C to 70°C 12 ppm/°C
Bandwidth BW 2 kHz
RFI Filter Cutoff (Each Input) 1 MHz
OPERATIONAL AMPLIFIER (A1)
Offset Voltage V
OS
1 5 mV
Average TC T
A
= 0°C to 70°C 5 µV/°C
Input Bias Current I
B
100 pA
T
A
= 0°C to 70°C 1 nA
Input Offset Current I
OS
100 pA
T
A
= 0°C to 70°C 1 nA
Input Voltage Range 0.1 +V
S
− 0.1 V
Common-Mode Rejection Ratio CMRR V
CM
= 0.5 V to 2.5 V 100 dB
Power Supply Rejection Ratio PSRR 100 dB
Large Signal Voltage Gain A
VO
110 dB
Output Voltage Range R
L
= 50 kΩ 0.1 +V
S
− 0.1 V
Short-Circuit Current Limit
I
OUT
12
mA
Gain Bandwidth Product GBP 100 kHz
Slew Rate SR 0.02 V/µs
Voltage Noise Density (RTI) e
n
f = 1 kHz 60 nV/√Hz
Peak-to-Peak Voltage Noise (RTI) e
n p-p
f = 0.1 Hz to 10 Hz 6 µV p-p
f = 0.5 Hz to 40 Hz 8 µV p-p