JAJSF79F March 2002 – April 2018 OPA2357 , OPA357
PRODUCTION DATA.
To achieve a maximally-flat, second-order Butterworth frequency response, set the feedback pole using Equation 3.
Calculate the bandwidth using Equation 4.
For other transimpedance bandwidths, consider the high-speed CMOS OPA380 (90-MHz GBW), OPA354
(100-MHz GBW), OPA300 (180-MHz GBW), OPA355 (200-MHz GBW), or OPA656 and OPA657 (400-MHz GBW).
For single-supply applications, the +INx input can be biased with a positive DC voltage to allow the output to reach true zero when the photodiode is not exposed to any light, and respond without the added delay that results from coming out of the negative rail; Figure 42 shows this configuration. This bias voltage appears across the photodiode, providing a reverse bias for faster operation.
For additional information, see the Compensate Transimpedance Amplifiers Intuitively application bulletin.