TIDUEU6B September 2020 – December 2021 OPA810
Table 2-1 explains the ranges for different components with respect to the RG - RF and frequency settings.
PARAMETERS | RG = RF SETTING | |||
---|---|---|---|---|
Frequency (Hz) | Component | 100 Ω | 5 kΩ | 100 kΩ |
100 | R | 1 Ω to 900 Ω | 500 Ω to 50 kΩ | 10 kΩ to 10 MΩ |
L | 1.59 mH to 2.38 H | 2.27 H to 79.5 H | 72.9 H to 1432 H | |
C | 1.05 µF to 1.59 mF | 31.78 nF to 1.11 µF | 1.76 nF to 34.7 nF | |
1 k | R | 1 Ω to 900 Ω | 500 Ω to 50 kΩ | 10 kΩ to 10 MΩ |
L | 159 µH to 238 mH | 227 mH to 7.95 H | 7.29 H to 143.23 H | |
C | 106 nF to 159 µF | 3.178 nF to 111 nF | 176 pF to 3.47 nF | |
10 k | R | 1 Ω to 900 Ω | 500 Ω to 50 kΩ | 10 kΩ to 10 MΩ |
L | 25.9 µH to 23.8 mH | 22.6 mH to 795 mH | 729 mH to 14.3 H | |
C | 10.6 nF to 15.9 µF | 317.8 pF to 11.1 nF | 17.6 pF to 347 pF | |
100 k | R | 1 Ω to 900 Ω | 500 Ω to 50 kΩ | 10 kΩ to 10 MΩ |
L | 2.59 µH to 2.38 mH | 2.26 mH to 79.6 mH | 72 mH to 1.43 H | |
C | 1.06 nF to 1.59 µF | 31.78 pF to 1.11 nF | 1.76 pF to 34.7 pF |
In the 100 kΩ setting, the parasitic cap at the inverting pin can make the circuit unstable. To overcome this problem a 5 pF capacitor is added in parallel with RF = 100 kΩ.