Amplifier Signal Compatibility
Calculate the compatibility of a sensor with a preamplifier to ensure the output voltage limits and bandwidths are compatible.
Input Power (W)
Input Wavelength (μm)
Peak Responsivity (A/W)
Responsivity Peak (μm)
Responsivity (A/W)
Dark Current (A)
Amplifier Gain (V/A)
Amplifier Output Limit (V)
Compatible
Output Signal (V - DC)
Output Signal (V - AC) with 10x gain on AC port
Measurement Bandwidth (Hz)
Amplifier Bandwidth Limit (Hz)
Compatible
From amplifier specification
Frequency at -3dB point, starting from zero
The combination of dark current and signal current should not saturate the amplifier output limits to ensure the signal is maintained in the linear region.
This calculator assumes a two-stage amplifier, with a 10x gain between the first stage DC-coupled gain stage and the second stage AC-coupled gain stage.
This model uses the Linear Responsivity Relationship to correct for off-peak response. This is valid for wavelengths below the peak to within 10% percent.
This simplified model is valid for a monochromatic signal, such as from a laser
To use this calculator
- Gather system inputs and enter into fields.
- Gather sensor specifications and enter into fields.
- Gather amplifier specifications and enter into fields.
System Inputs Needed
- Input power
- Input wavelength
- Measurement bandwidth
From sensor specifications
- Peak responsivity
- Peak response wavelength
- Dark current
From amplifier specifications
- Amplifier gain
- Amplifier Output Voltage Limit
- Amplifier bandwidth limit
Power for 50% Amplifier Saturation
Calculate the allowed input power of a sensor to ensure compatibility with a preamplifier to ensure the output voltage limits are compatible.
Input Wavelength (μm)
Peak Responsivity (A/W)
Responsivity Peak (μm)
Responsivity (A/W)
Dark Current (A)
Amplifier Gain (V/A)
Amplifier Output Limit (V)
Input Power (W)
From amplifier specification
The combination of dark current and signal current should not saturate the amplifier output limits to ensure the signal is maintained in the linear region.
This calculator assumes a two-stage amplifier, with a 10x gain between the first stage DC-coupled gain stage and the second stage AC-coupled gain stage.
This model uses the Linear Responsivity Relationship to correct for off-peak response. This is valid for wavelengths below the peak to within 10% percent.
This simplified model is valid for a monochromatic signal, such as from a laser.
To use this calculator
- Gather system inputs and enter into fields.
- Gather sensor specifications and enter into fields.
- Gather amplifier specifications and enter into fields.
System Inputs Needed
- Input wavelength
From sensor specifications
- Peak responsivity
- Peak response wavelength
- Dark current
From amplifier specifications
- Amplifier gain
- Amplifier Output Voltage Limit