OPA690 Module High Speed Op Amp Current Buffer Non-Inverting Amplifier Competition Module 500M Bandwidth Product
US $20.3 -10%
In order to reduce the possibility of self-excitation of high-speed operational amplifiers, high-quality capacitor-resistor devices are used as far as possible in board layout, and fixed resistors are used instead of sliding rheostats for gain variation. It is easy to cause self-excitation of operational amplifiers.
The module adopts fixed resistance mode for gain adjustment, which is stable and reliable, and has good high frequency performance. Because of the AC characteristics of the operational amplifier and the limitation of the gain bandwidth product, the higher the gain of the operational amplifier, the smaller the bandwidth.
So when you use amplifier, if the amplification factor is very large, please use multi-stage cascade amplification to meet the bandwidth and gain requirements. If the rear stage needs to be loaded, use a high-speed broadband current buffer.
Name: OPA690 High Speed Broadband Operational Amplifier High Speed Current Buffer
Size: 50mm * 42mm
Power supply: ±5V
Output current: 190mA
Amplifier Type: In-phase Amplifier
Amplification gain multiple: 10 times
Gain calculation: 1 + R1 / R2 (as indicated by this module)
Operational Amplifier Gain, Bandwidth, GBW Common Knowledge: (Selection as Buyer):
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
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