Frequently Asked Questions: Amplifiers >> High Speed Amplifiers >> HSA Selection Guide >> JFET Input Amplifier Selection Guide
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JFET Input
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Introduction:
- FET/CMOS-input amplifiers offer lower current noise, higher input impedance, lower bias currents, and less popcorn noise for a similar bandwidth as a bipolar-input op amp.
Applications:
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Active Probe |
Data Aquistion(DAQ) | Semiconductor Test & ATE | ||||
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In-vitro diagnostics |
Flow Cytometry |
Optical Blood Analyzer |
- A list of TI publications related to high speed amplifiers and their applications can be found here: Application Notes
Recommended Device Table:
| Devices | Voltage Supply (V) | Large Signal BW 2Vpp (MHz) | Slew rate (V/us) | Input Impedance (GΩ) | Noise (nV/√Hz) |
| BUF802 | 9 to 13 | 1600 | 7000 | 50 | 2.3 |
| OPA818 | 6 to 13 | 400 | 1400 | 500 | 2.2 |
| OPA817 | 6 to 12.6 | 250 | 1000 | 60 | 4.5 |
| OPA814 | 6 to 12.6 | 200 | 700 | 60 | 5.3 |
| THS4631 | 10 to 32 | 230 | 1000 | 10 | 7 |
| OPA810/OPA2810 | 4.75 to 24 | 70 | 200 | 12 | 6.3 |
- For more information about design challenges and details about pairing High-Speed JFET amplifiers with Hi-Z DAQ systems - SBOT049.