Datasheet

Data Sheet AD8691/AD8692/AD8694
Rev. F | Page 9 of 16
0.0001
0.001
0.01
THD + N (%)
20 100 1k 10k 20k
FREQUENCY (Hz)
04991-021
0.1
V
S
= ±2.5V
A
V
= 1
V
IN
= 1V p-p
BW = 20kHz
R
L
= 1kΩ
R
L
= 600Ω
R
L
= 100kΩ
Figure 23. THD + N vs. Frequency
VOLTAGE NOISE (1µV/DIV)
TIME (1s/DIV)
04991-022
V
S
= 5V AND 2.7V
Figure 24. 0.1 Hz to 10 Hz Input Voltage Noise
NOISE (nV/ Hz)
1
100
10
1000
FREQUENCY (Hz)
101 100 1000
10000
04991-023
V
S
= ±2.5V AND ±1.35V
Figure 25. Voltage Noise Density
1k 10k 100k
1M 10M
CHANNEL SEPARATION (dB)
FREQUENCY (Hz)
04991-024
80
90
110
120
130
140
150
100
V
IN
28mV p-p
V–
–2.5V
V+
+2.5V
A
B
V
OUT
V+
V–
R1
10kΩ
R2
100Ω
Figure 26. AD8692/AD8694 Channel Separation