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Technical Specifications
Parameters and characteristics for this part
| Specification | OPA657N/250G4 |
|---|---|
| -3db Bandwidth | 350 MHz |
| Amplifier Type | Voltage Feedback |
| Current - Input Bias | 2 pA |
| Current - Output / Channel [custom] | 70 mA |
| Current - Supply | 14 mA |
| Gain Bandwidth Product | 1.6 GHz |
| Mounting Type | Surface Mount |
| Number of Circuits | 1 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | SC-74A, SOT-753 |
| Slew Rate | 700 V/µs |
| Supplier Device Package | SOT-23-5 |
| Voltage - Input Offset | 250 çV |
| Voltage - Supply Span (Max) [Max] | 12 V |
| Voltage - Supply Span (Min) [Min] | 8 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 250 | $ 11.70 | |
| 500 | $ 10.95 | |||
Description
General part information
OPA657 Series
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.
Documents
Technical documentation and resources
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