OPA2182: The chopper frequency of OPA2182

Aaron Chen (FAE)

Part Number: OPA2182

Hi Experts,

May I know the chopper frequency of OPA2182?
Since it seem there is no such information on datasheet.

BR,

Aaron Chen

0 Clemens Ladisch over 3 years ago

Guru 316440 points

The closed-loop gain and the output impedance have a small notch at about 150 kHz; the noise spectrum has its first peak at about 300 kHz:

OPA2182 Closed-Loop Gain vs Frequency OPA2182 Open-Loop Output Impedance vs Frequency OPA2182 Input Voltage Noise Spectral Density vs Frequency

0 Aaron Chen (FAE) over 3 years ago in reply to Clemens Ladisch

Hi Clemens,

Thanks for the answer.

May I know what is the chopper frequency mean?
How to identify it on the previous picture?

BR,

Aaron Chen

0 Clemens Ladisch over 3 years ago in reply to Aaron Chen (FAE)

Guru 316440 points

It's 150 kHz.

(For practical purposes, you need to know only at which frequencies it affects your circuit, which is shown in these graphs.)

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