Multi-band radio tuner

Available from Active Components is the Philips TEA6845H, an AM double conversion (10.7 MHz/450 kHz) receiver for LW, MW and SW (5.85-9.99 MHz) and an FM single conversion (10.7 MHz) receiver capable of operating on US FMs, Europe FM, East Europe FM, Japan FM (65-108 MHz) and US weather bands.

It features microcontroller tuning using the I2C-bus and a fast synthesiser PLL tuning system with local control for inaudible RDS updating and an FM quadrature demodulator with automatic centre frequency adjustment and total harmonic distortion compensation.

The AM and FM AGC PIN diode drive can be activated, programmed and the threshold set via the I2C-bus.

The level detector for AM and FM has a temperature compensated output voltage and the starting point and slope of level output is programmable via the I2C-bus. It has several test modes available for fast IC and system tests.