This is a breakout board for the Rafael Microelectronics R820T2 Advanced
Digital TV Silicon Tuner chip. This is the same chip used in most all of the
RTL-SDR dongles, as well as the Airspy and numerous other radios. The chip
is a versatile front-end with reasonable sensitivity and wide tuning range.
The design presented here is almost an exact implementation of the Mfg's
suggested demo design from the datasheet, implemented on the OSHpark 4-layer
PCB process and provides a simple 4-pin interface with power, ground and I2C
bus for controlling the tuner. A broad-band RF input and 10MHz IF output are
provided on SMA connectors.
- R820T2 tuner chip
- Onboard 3.3V Regulator (5V input).
- Full Mfg's suggested support circuitry.
- Optional crystal or TCXO LO reference frequency.
- 50-ohm SMA input and output
I've provided a simplified driver based on work from Airspy and the Linux
media drivers which allows control of the R820T2 from an STM32F0xx processor.
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