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Wideband, Unity Gain Stable FET-Input Operational Amplifier


Package | PIN: DBV | 5
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $8.86
10-24 $8.23
25-99 $7.95
100-249 $6.94
250-499 $6.61
500-749 $6.08
750-999 $5.46
1000+ $5.44


  • 500 MHz Unity-gain Bandwidth
  • Low Input Bias Current: 2 pA
  • Low Offset And Drift: ±250 µV, ±2 µV/°C
  • Low Distortion: 74-dB SFDR at 5 MHz
  • High-Output Current: 70 mA
  • Low Input Voltage Noise: 7 nV/√Hz

Texas Instruments  OPA656NB/250

The OPA656 device combines a very wideband, unity-gain stable, voltage-feedback operational amplifier with a FET-input stage to offer an ultra high dynamic-range amplifier for Analog-to-Digital Converter (ADC) buffering and transimpedance applications. Extremely low DC errors give good precision in optical applications.

The high unity-gain stable bandwidth and JFET input allows exceptional performance in high-speed, low-noise integrators.

The high input impedance and low bias current provided by the FET input is supported by the ultra-low 7-nV/√Hz input voltage noise to achieve a very low integrated noise in wideband photodiode transimpedance applications.

Broad transimpedance bandwidths are achievable given the OPA656 device’s high 230-MHz gain bandwidth product. As shown below, a –3-dB bandwidth of 1 MHz is provided even for a high 1-MΩ transimpedance gain from a 47-pF source capacitance.