Datasheet

AD8610/AD8620
Rev. F | Page 17 of 24
THD Readings vs. Common-Mode Voltage
Total harmonic distortion of the AD8610/AD8620 is well below
0.0006% with any load down to 600 . The AD8610 outperforms
the OPA627 for distortion, especially at frequencies above 20 kHz.
10 100 1k 10k 80k
02730-058
THD + N (%)
FREQUENCY (Hz)
0.1
0.01
0.001
0.0001
OPA627
AD8610
V
S
= ±13V
V
IN
= 5V rms
BW = 80kHz
Figure 58. AD8610 vs. OPA627 THD + Noise @ V
CM
= 0 V
10 100 1k 10k 20k
02730-059
THD + N (%)
FREQUENCY (Hz)
0.1
0.01
0.001
4V rms
6V rms
2V rms
V
S
= ±13V
R
L
= 600Ω
Figure 59. THD + Noise vs. Frequency
Noise vs. Common-Mode Voltage
The AD8610/AD8620 noise density varies only 10% over the
input range, as shown in Table 5.
Table 5. Noise vs. Common-Mode Voltage
V
CM
at f = 1 kHz (V) Noise Reading (nV/√Hz)
−10 7.21
−5 6.89
0 6.73
+5 6.41
+10 7.21
Settling Time
The AD8610/AD8620 have a very fast settling time, even to a
very tight error band, as can be seen from Figure 60. The AD8610/
AD8620 are configured in an inverting gain of +1 with 2 k input
and feedback resistors. The output is monitored with a 10×,
10 M, 11.2 pF scope probe.
0.001 0.01 0.1 1 10
02730-060
SETTLING TIME (ns)
ERROR BAND (%)
1.2k
1.0k
800
600
400
200
0
Figure 60. AD8610/AD8620 Settling Time vs. Error Band
OPA627
0.001 0.01 0.1 1 10
02730-061
SETTLING TIME (ns)
ERROR BAND (%)
1.2k
1.0k
800
600
400
200
0
Figure 61. OPA627 Settling Time vs. Error Band