Name: OPA847 High Speed Low Noise Broadband Operational Amplifier

Power supply: ±5V

Bandwidth: 3.9GHz

Output current: voltage type amplifier, does not have load capacity

Amplification type: non-inverting amplifier

Gain adjustment: In order to reduce the possibility of self-excitation of high-speed op amps, the on-board layout uses high-quality capacitor resistors as much as possible, and uses fixed resistors. Do not use sliding rheostats for gain changes, which can easily cause op amps. Self-excited shock. The gain adjustment of this module adopts fixed resistance mode, which is stable and reliable, and has excellent high-frequency performance. Due to the AC characteristics of the op amp and the limitation of the gain-bandwidth product, the higher the gain of the op amp, the corresponding bandwidth is greatly reduced, so when buyers use the amplifier, if the amplification factor is large, please use multi-stage Amplification in the joint form to meet the bandwidth requirements and gain requirements. If the latter stage needs to be loaded, please use a high-speed broadband current buffer.

AC characteristics: When the gain bandwidth product of GBW is 1 kHz and amplified 128 times, the margin of GBW > 128kHz in practical application is 10-100 times. GBW should be greater than 5 MHz.

AC characteristics: Voltage swing rate MAX voltage 25.6Vpp, 1kHz

SR=2πVpkf=2*3.14*25.6v*1KHz=0.16V/μs

AS practical application leave 10-100 times margin, so 2V/μs should be chosen.

To sum up: Vs > 30V, Vos < 1mV, GBW > 5Mhz, SR > 2V/μs

Options: OPA227, OPA209, OPA211