Frequently Asked Questions: Amplifiers >> High Speed Amplifiers >> HSA Selection Guide >> FDA Selection Guide
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FDAS
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Introduction:
- Fully differential amplifiers (FDAs) convert single-ended signals to differential signals and are ideal for pairing with differential input ADCs and DACs.
Applications:
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Active Probe |
Data Acquisition (DAQ) | Semiconductor Test & ATE | ||||
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Vibration monitoring |
Fish Finders |
Semiconductor Manufacturing |
Medical Ultrasound |
In-vitro diagnostics |
MRI |
Electrosurgery |
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Fetal Monitoring |
- A list of TI publications related to high speed amplifiers and their applications can be found here: Application Notes
Recommended Device Table:
| Devices | ADC Pairing | Common ADCs | GBW (MHz) | Noise (nV/√Hz) | Voltage Offset (uV) | Iq (mA) |
| THS4531A | > 14-bit, 500kSPS–1MSPS | ADS8922B, AD7665 | 36 | 10 | 400 | 0.25 |
| THS4561 | > 14-bit, 1–2MSPS | ADS1602 | 68 | 4 | 250 | 0.775 |
| THS4535 | > 14-bit, 512kSPS- 1MSPS | ADS127L01, ADS8860, ADS8881, AD7175-x, AD7982, AD7764 | 80 | 3.9 | 2000 | 4.7 |
| THS4551 | > 16-bit, 1–4MSPS | ADS127L11, AD7768 | 135 | 3.3 | 175 | 1.37 |
| THS4541 | > 10MSPS |
ADC354[1,2], LTC2246, LTC2140-14, LTC2256-14 ADC364[1,2], LTC2263-14, LTC2266-14, ISLA224P12 |
850 | 2.2 | 450 | 10.1 |
| THS4509 | > 100MSPS |
ADC3544 ADC3664 |
3000 | 1.9 | 4 | 37.7 |
- For more information about design challenges and details about pairing ADC Drivers With Fully-Differential Input ADCs - SBOT050.
Recommended Automotive Qualified Device Table:
| Devices | ADC Pairing | Common ADCs | GBW (MHz) | Noise (nV/√Hz) | Voltage Offset (uV) | Iq (mA) |
| LMH6551Q-Q1 | > 16-bit, 1–4MSPS |
ADC12LO66 ADC12081 |
370 | 6 | 5000 | 12.5 |
| THS4541-Q1 | > 10MSPS |
ADC354[1,2] ADC364[1,2] |
850 | 2.2 | 450 | 10.1 |
| THS4509-Q1 | > 100MSPS |
ADC3544 ADC3664 |
3000 | 1.9 | 4 | 37.7 |
For help desinging and suggestions for the best fully differential amplifier check out the Analog Circuit Design Studio tool.