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We need a custom level detector designed and implemented as a prototype. The circuit is for measuring the amplitude of a sine wave signal. This amplitude in decibel (dB) can be read by a simple microprocessor interface (I2C, SPI etc.) or read through an A/D converter. The A/D converter and/or microprocessor is not a required part of this project, but provisions for rigorous testing are required.
Input frequency: 500 Hz to 500 MHz
Input range: -90 dBm to -40 dBm
Accuracy: 0.25 dBm
Input connector: SMA female.
Impedance: 50R +/- 10%
Max input level: 10 dBm (must survive signals up to 5Vp-p)
Board size: max 100 mm by 50 mm
Power source: USB
Temperature: 0C to 65C.
Humidity: 0% RH to 95% RH, non-condensing.
BOM cost (Farnell/Digikey/Mouser 100 pcs pricing): Max EUR 100
Having a look-up table with calibration values to be applied to the output signal is acceptable, but the circuit needs to be designed in a way that this calibration is valid over the temperature range and supply voltage...
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