Testing - Frequency Response

A project log for "High" Bandwidth - Current Sense Amplifier

Configurable gain and bandwidth current sense amplifier. DC to 1MHz/100kHz bandwidth, at 25x/50x gain.

jesse-farrellJesse Farrell 06/05/2023 at 01:000 Comments

After some initial spark-up (pretty uneventful, magic smoke did not escape) I wanted to quickly take a look at the bandwidth. The following results were taken using OPA1664AIPWR as the main op-amp. Note that the spikie phase response is just the foldback from -180 to +180.

25x @High BWL

25x @Low BWL

50x @High BWL

50x @Low BWL