Datasheet

Data Sheet AD8641/AD8642/AD8643
Rev. E | Page 11 of 16
0
10
20
30
40
50
60
70
OVERSHOOT (%)
CAPACITANCE (pF)
1 10010 1000
05072-032
OS+
OS–
V
S
= ± 2.5V
R
L
= 10k Ω
V
IN
= 100mV p-p
A
V
= +1
Figure 37. Small Signal Overshoot vs. Load Capacitance
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
1.0
INPUT BIAS (pA)
–5 –4 –3 –2 –1 0 1 2 3 4 5
V
CM
(V)
05072-009
05072-033
CH1 1.00V M1.00s A CH1 –20.0V
1
V
S
= ±13V
G = +1M
CH1 p-p = 4.26V
Figure 38. 0.1 Hz to 10 Hz Noise
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
1.0
INPUT BIAS (pA)
–5 –4 –3 –2 –1 0 1 2 3 4 5
V
CM
(V)
0
5072-009
05072-034
CH1 1.00V M1.00s A CH1 –20.0V
1
V
S
= ±2.5V
G = +1M
CH1 p-p = 4.06V
Figure 39. 0.1 Hz to 10 Hz Noise
VOLTAGE NOISE DENSITY (nV/ Hz)
1
10
100
1k
FREQUENCY (Hz)
10 1k100 10k
05072-035
V
SY
= ±13V
Figure 40. Voltage Noise Density
VOLTAGE NOISE DENSITY (nV/ Hz)
1
10
100
1k
FREQUENCY (Hz)
10 1k100 10k
05072-036
V
SY
= 5V
Figure 41. Voltage Noise Density
0.000001
0.00001
0.0001
0.001
1k10012
THD + NOISE (%)
FREQUENCY (Hz)
05072-037
0.004
0k
1V p-p INPUT
2V p-p INPUT
4V p-p INPUT
8V p-p INPUT
V
SY
= ±13V
LOAD = 100kΩ
GAIN = +1
10k
Figure 42. Total Harmonic Distortion + Noise vs. Frequency