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Low-Noise Current Amplifier (Transimpedance Amplifier) LCA-400k-10M
LCA-400k-10M;Transimpedance Amplifier
Model：LCA-400k-10M
Contact：
Huang
Email: Hqy@ybphotonics.com
Huang
Email: Hqy@ybphotonics.com
Introduction
LCA-400k-10M: 400kHz ultra-low-noise transimpedance amplifier for precision photodetection & measurement
Features
- Bandwidth: DC–400kHz
- Rise/Fall Time: 1μs
- Gain: 1×10⁷ V/A (@load >10 kΩ)
- Ultra-low noise: equivalent input noise current 63fA/√Hz
Applications
- Photodiode & photomultiplier tube amplification
- Spectral analysis systems
- Electronic measurement
- Ion detection equipment
- Preamplifier for lock-in amplifiers, ADCs, etc.
Specifications
Test Condition: Vs=±12V, Ta=25℃
Item Parameters Gain Transimpedance Gain 1×10⁷ V/A (@load >10 kΩ) Gain Accuracy ±3% Frequency Response Lower Frequency Limit DC Upper Frequency Limit 400kHz (-3dB) Rise/Fall Time (10–90%) 1μs Input Input Noise Current 63fA/√Hz (@10kHz) Input Noise Voltage 4.0nV/√Hz (@10kHz) Input Bias Current 2pA typical Bias Current Compensation ±3nA Maximum Input Current ±1μA Input Bias Voltage <2mV DC Input Impedance 50Ω Output Maximum Output Voltage Range ±10V (@load >10 kΩ) Output Impedance 50Ω (best performance >10 kΩ) Maximum Output Current ±100mA Power Supply Voltage ±12V Current ±100mA typical Housing Weight 105g Material 6061 Aluminum Alloy Temperature Storage Temperature -40…+85℃ Operating Temperature -20…+60℃ Absolute Maximum Ratings Input Voltage ±5V Supply Voltage ±20V Connectors Input BNC Female Output BNC Female Power Connector M8 3-pin Female1=Brown(+12V)2=Black(GND)3=Blue(-12V)
Application Diagram
- Photovoltaic mode (photodetector bias): for low-speed, minimum dark current
- Photoconductive mode (photodetector bias): for high-speed applications; bias reduces detector capacitance
Dimension
Delivery List
No. Name Specifications Quantity Remarks 1 High Speed Current Amplifier / 1 2 Power Cable 3-core shielded cable, M8 male, 2m 1 Power supply not included 3 RF Cable RG316-BNC-JJ, 1m 1
LCA-400k-10M: 400kHz ultra-low-noise transimpedance amplifier for precision photodetection & measurement
Features
- Bandwidth: DC–400kHz
- Rise/Fall Time: 1μs
- Gain: 1×10⁷ V/A (@load >10 kΩ)
- Ultra-low noise: equivalent input noise current 63fA/√Hz
Applications
- Photodiode & photomultiplier tube amplification
- Spectral analysis systems
- Electronic measurement
- Ion detection equipment
- Preamplifier for lock-in amplifiers, ADCs, etc.
Specifications
Test Condition: Vs=±12V, Ta=25℃
| Item | Parameters |
|---|---|
| Gain | |
| Transimpedance Gain | 1×10⁷ V/A (@load >10 kΩ) |
| Gain Accuracy | ±3% |
| Frequency Response | |
| Lower Frequency Limit | DC |
| Upper Frequency Limit | 400kHz (-3dB) |
| Rise/Fall Time (10–90%) | 1μs |
| Input | |
| Input Noise Current | 63fA/√Hz (@10kHz) |
| Input Noise Voltage | 4.0nV/√Hz (@10kHz) |
| Input Bias Current | 2pA typical |
| Bias Current Compensation | ±3nA |
| Maximum Input Current | ±1μA |
| Input Bias Voltage | <2mV |
| DC Input Impedance | 50Ω |
| Output | |
| Maximum Output Voltage Range | ±10V (@load >10 kΩ) |
| Output Impedance | 50Ω (best performance >10 kΩ) |
| Maximum Output Current | ±100mA |
| Power Supply | |
| Voltage | ±12V |
| Current | ±100mA typical |
| Housing | |
| Weight | 105g |
| Material | 6061 Aluminum Alloy |
| Temperature | |
| Storage Temperature | -40…+85℃ |
| Operating Temperature | -20…+60℃ |
| Absolute Maximum Ratings | |
| Input Voltage | ±5V |
| Supply Voltage | ±20V |
| Connectors | |
| Input | BNC Female |
| Output | BNC Female |
| Power Connector | M8 3-pin Female1=Brown(+12V)2=Black(GND)3=Blue(-12V) |
Application Diagram
- Photovoltaic mode (photodetector bias): for low-speed, minimum dark current
- Photoconductive mode (photodetector bias): for high-speed applications; bias reduces detector capacitance
Dimension
Delivery List
| No. | Name | Specifications | Quantity | Remarks |
|---|---|---|---|---|
| 1 | High Speed Current Amplifier | / | 1 | |
| 2 | Power Cable | 3-core shielded cable, M8 male, 2m | 1 | Power supply not included |
| 3 | RF Cable | RG316-BNC-JJ, 1m | 1 |
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