Datasheet

AD8231
Rev. B | Page 16 of 24
1000
900
800
700
600
500
400
300
200
100
0
1 100k10k1k10010
SPECTRAL NOISE DENSITY (nV/ Hz)
FREQUENCY (Hz)
06586-141
Figure 41. Operational Amplifier Voltage Spectral Noise Density vs. Frequency
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–0.2
–40 1251109580655035205–10–25
BIAS CURRENT (nA)
TEMPERATURE (°C)
06586-108
5V
3V
Figure 42. Operational Amplifier Bias Current vs. Temperature
400
–400
–300
–200
–100
0
200
300
100
–3 3210–1–2
BIAS CURRENT (pA)
V
CM
(V)
V
S
= ±1.5V
V
S
= ±2.5V
06586-109
Figure 43. Operational Amplifier Bias Current vs. Common Mode
06586-144
+
V
S
–V
S
1.0
0.8
0.6
0.4
0.2
–1.0
–0.8
–0.6
–0.4
–0.2
0.1 100101
OUTPUT VOLTAGE SWING (V)
REFERRED TO SUPPLY VOLTAGES
OUTPUT CURRENT (mA)
–40°C
+25°C
+85°C
+125°C
Figure 44. Operational Amplifier Output Voltage Swing vs.
Output Current, V
S
= 3 V
06586-145
+
V
S
–V
S
1.0
0.8
0.6
0.4
0.2
–1.0
–0.8
–0.6
–0.4
–0.2
0.1 100101
OUTPUT VOLTAGE SWING (V)
REFERRED TO SUPPLY VOLTAGES
OUTPUT CURRENT (mA)
–40°C
+25°C
+85°C
+125°C
Figure 45. Operational Amplifier Output Voltage Swing vs.
Output Current, V
S
= 5 V
140
120
100
80
60
40
20
0
1 100k10k1k10010
PSRR (dB)
FREQUENCY (Hz)
06586-148
+PSRR
–PSRR
Figure 46. Operational Amplifier Power Supply Rejection Ratio