Frequently Asked Questions: Amplifiers >> High Speed Amplifiers >> HSA Selection Guide >> Transimpedance Amplifier Selection Guide
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TIAs
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Introduction:
- The transimpedance op amp circuit configuration converts an input current source into an output voltage.The current to voltage gain is based on the feedback resistance.
Applications:
| LiDAR Module | Optical time-of-flight (ToF) | Position Sensor | Mobile Robot Sensor | Laser Distance Meter | Optical time domain reflectometer (OTDR) | Vacuum Robots |
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Currency Counters |
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
Recommend Discrete TIAs Device Table:
| Devices | GBW (GHz)(min V/V) | Iq (mA) | Voltage Noise (nV/√Hz) | Input Capacitance (CM/Diff) | Application Benefits |
| OPA855 (Bipolar) | 8 (7) | 17.8 | 0.95 | 0.6/0.2 |
Best noise at lower gains Highest bandwidth possible |
| OPA856 (Bipolar) | 1 (1) | 17.2 | 0.9 | 0.4/0.7 |
Unity gain suitable for clamping Good noise performance for low gains |
| OPA858 (FET) | 5 (7) | 20.5 | 2.5 | 0.6/0.2 |
Best noise performance at high gains High bandwidth and low input current |
| OPA859 (FET) | 0.9 (1) | 20.5 | 3.3 | 0.6/0.2 |
Maximum application flexibility Good high gain noise performance |
Recommend Integrated TIAs Device Table:
| Devices | BW (MHz) | Gain | Input Noise (nARMS) | Features | Output |
| LMH34400 | 240 | Fixed gain: 40kΩ | 50 |
Ambient light cancellation 100mA current clamp & overload protection |
Single-ended output |
| LMH32401 | 450 | Programmable gain: 2kΩ / 20kΩ | 49 |
Ambient light cancellation 100mA current clamp & overload protection |
Fully Differential output |
| LMH32404 | 350 | Fixed gain: 20 kΩ | 56 |
Integrated output multiplexing Ambient light cancellation 100mA current clamp & overload protection |
Fully Differential output |
| OPA857 | 125 | Programmable gain: 5kΩ / 20kΩ | 15 | 30mA current clamp & overload protection | Psuedo Differential output |
Additional TIA Device Table:
| Devices | GBW (MHz) | Gain | Voltage Noise (nV/√Hz) | Features | Output |
| OPA3S2859 | 900 | Internal switches for Programmable gain | 2.2 |
Shutdown |
Single-ended output |
| OPA380/OPA2380 | 90 | Externally set | 5.8 |
High precision (25uV) |
Single-ended output |
Recommended Die Sale TIA Device Table:
| Devices | BW (MHz) | Gain | Input Noise (nARMS) | Features | Output |
| LMH32401YR | 450 | Programmable gain: 2kΩ / 20kΩ | 49 |
Ambient light cancellation 100mA current clamp & overload protection |
Fully Differential output |
| LMH32404YR | 350 | Fixed gain: 20 kΩ | 56 |
Integrated output multiplexing Ambient light cancellation 100mA current clamp & overload protection |
Fully Differential output |
| OPA857-DIE | 125 | Programmable gain: 5kΩ / 20kΩ | 15 |
30mA current clamp & overload protection |
Psuedo Differential output |
Recommended Automotive Qualified TIA Device Table:
| Devices | BW (MHz) | Gain | Input Noise (nARMS) | Features | Output |
| LMH32401-Q1 | 450 | Programmable gain: 2kΩ / 20kΩ | 49 |
Ambient light cancellation 100mA current clamp & overload protection |
Fully Differential output |
| LMH32404-Q1 | 350 | Fixed gain: 20 kΩ | 56 |
Integrated output multiplexing Ambient light cancellation 100mA current clamp & overload protection |
Fully Differential output |
| Devices | GBW (GHz)(min V/V) | Iq (mA) | Voltage Noise (nV/√Hz) | Input Capacitance (CM/Diff) | Application Benefits |
| OPA855-Q1 (Bipolar) | 8 (7) | 17.8 | 0.95 | 0.6/0.2 |
Best noise at lower gains Highest bandwidth possible |
| OPA858-Q1 (FET) | 5 (7) | 20.5 | 2.5 | 0.6/0.2 |
Best noise performance at high gains High bandwidth and low input current |
| OPA859-Q1 (FET) | 0.9 (1) | 20.5 | 3.3 | 0.6/0.2 |
Maximum application flexibility Good high gain noise performance |
For help desinging and suggestions for the best transimpedance amplifier check out the Analog Circuit Design Studio tool.