Texas Instruments OPA381

the opa381 family of transimpedance amplifiers provides 18mhz of gain bandwidth (gbw) with extremely high precision excellent long-term stability and very low 1/f noise. the opa381 features an offset voltage of 25v (max) offset drift of 0.1v/c (max) and bias current of 3pa. the opa381 far exceeds the offset drift and noise performance that conventional jfet op amps provide. the signal bandwidth of a transimpedance amplifier depends largely on the gbw of the amplifier and the parasitic capacitance of the photodiode as well as the feedback resistor. the 18mhz gbw of the opa381 enables a trans-impedance bandwidth of >: 250khz in most configurations. the opa381 is ideally suited for fast control loops for power level measurement on an optical fiber. view all in datasheet