The THS4631 is a high-speed, FET-input operational amplifier designed for applications requiring wideband operation, high-input impedance, and high-power supply voltages. By providing a 210-MHz gain bandwidth product, ±15-V supply operation, and 100-pA input bias current, the THS4631 is capable of simultaneous wideband transimpedance gain and large output signal swing. The fast 1000 V/µs slew rate allows for fast settling times and good harmonic distortion at high frequencies. Low current and voltage noise allow amplification of extremely low-level input signals while still maintaining a large signal-to-noise ratio.
●The characteristics of the THS4631 make it ideally suited for use as a wideband photodiode amplifier. Photodiode output current is a prime candidate for transimpedance amplification as shown below. Other potential applications include test and measurement systems requiring high-input impedance, ADC and DAC buffering, high-speed integration, and active filtering.
●The THS4631 is offered in an 8-pin SOIC (D), and the 8-pin SOIC (DDA) and MSOP (DGN) with PowerPAD™ package.
● High Bandwidth:
● 325 MHz in Unity Gain
● 210 MHz Gain Bandwidth Product
● High Slew Rate:
● 900 V/µs (G = 2)
● 1000 V/µs (G = 5)
● Low Distortion of –76 dB, SFDR at 5 MHz
● Maximum Input Bias Current: 100 pA
● Input Voltage Noise: 7 nV/√Hz
● Maximum Input Offset Voltage: 500 µV at 25°C
● Low Offset Drift: 2.5 µV/°C
● Input Impedance: 109 || 3.9 pF
● Wide Supply Range: ± 5 V to ± 15 V
● High Output Current: 95 mA
