RHF330 Datasheet, PDF (13/22 Pages) STMicroelectronics – Rad-hard 1 GHz low noise operational amplifier

RHF330
Power supply considerations
A capacitor C_G is added in the gain network to ensure a unity gain at low frequencies to
keep the right DC component at the output. C_G contributes to a high-pass filter with R_fb//R_G
and its value is calculated with regard to the cut-off frequency of this low-pass filter.
Figure 29. Circuit for +5 V single supply
10 µF
+
IN
R_in
+5 V
1 kΩ
_
R1
470 Ω
R2
470 Ω
+ 1 µF 10 nF
R_G
+
C_G
+5 V
R_fb
100 µ F
OUT
100 Ω
AM00836
Doc ID 15576 Rev 3
13/22