Catalog
1.6GHz, Low Noise, FET-Input Operational Amplifier
Key Features
• High Gain Bandwidth Product: 1.6 GHzHigh Bandwidth 275 MHz (G = 10)Slew Rate 700 V/µs (G = 10, 1-V Step)Available in High Grade With Improved DCSpecificationsOperating Temperature Range: –40°C to 85°CLow-Input Offset Voltage: ±250 µVLow-Input Bias Current: 2 pALow-Input Voltage Noise: 4.8 nV/√HzHigh-Output Current: 70 mAFast Overdrive RecoveryHigh Gain Bandwidth Product: 1.6 GHzHigh Bandwidth 275 MHz (G = 10)Slew Rate 700 V/µs (G = 10, 1-V Step)Available in High Grade With Improved DCSpecificationsOperating Temperature Range: –40°C to 85°CLow-Input Offset Voltage: ±250 µVLow-Input Bias Current: 2 pALow-Input Voltage Noise: 4.8 nV/√HzHigh-Output Current: 70 mAFast Overdrive Recovery
Description
AI
The OPA657 device combines a high-gain bandwidth, low-distortion, voltage-feedback operational amplifier with a low-voltage noise JFET-input stage to offer a very high dynamic range amplifier for high-precision ADC (analog-to-digital converter) driving or wideband transimpedance applications. Photodiode applications see improved noise and bandwidth using this decompensated, high-gain bandwidth amplifier.
Very low level signals can be significantly amplified in a single OPA657 gain stage with exceptional bandwidth and accuracy. Having a high 1.6-GHz gain bandwidth product gives greater than 10-MHz signal bandwidths up to gains of 160 V/V (44 dB). The very low input bias current and capacitance supports this performance even for relatively high source impedances.
Broadband photodetector applications benefit from the low-voltage noise JFET inputs for the OPA657. The JFET input contributes virtually no current noise while for broadband applications, a low voltage noise is also required. The low 4.8 nV/√Hzinput voltage noise provides exceptional input sensitivity for higher bandwidth applications. The example shown below gives a total equivalent input noise current of 1.8 pA/√Hzover a 10-MHz bandwidth.
The OPA657 device combines a high-gain bandwidth, low-distortion, voltage-feedback operational amplifier with a low-voltage noise JFET-input stage to offer a very high dynamic range amplifier for high-precision ADC (analog-to-digital converter) driving or wideband transimpedance applications. Photodiode applications see improved noise and bandwidth using this decompensated, high-gain bandwidth amplifier.
Very low level signals can be significantly amplified in a single OPA657 gain stage with exceptional bandwidth and accuracy. Having a high 1.6-GHz gain bandwidth product gives greater than 10-MHz signal bandwidths up to gains of 160 V/V (44 dB). The very low input bias current and capacitance supports this performance even for relatively high source impedances.
Broadband photodetector applications benefit from the low-voltage noise JFET inputs for the OPA657. The JFET input contributes virtually no current noise while for broadband applications, a low voltage noise is also required. The low 4.8 nV/√Hzinput voltage noise provides exceptional input sensitivity for higher bandwidth applications. The example shown below gives a total equivalent input noise current of 1.8 pA/√Hzover a 10-MHz bandwidth.
