GENERAL DESCRIPTION
The TEA6100 is a FM/IF system circuit intended for microcomputer controlled radio receivers. The circuit includes highly sensitive analogue circuitry. The digital circuitry, including an I2C bus, controls the analogue circuitry and the AM/FM tuning and stop information for the microcomputer.

FEATUREs
• 4-stage symmetrical IF limiting amplifier
• Software selectable AM or FM input
• Symmetrical quadrature demodulator
• Single-ended LF output stage
• D.C. output level determined by the input signal
• Semi-adjustable AM and FM level voltage
• Multi-path detector/rectifier/amplifier circuitry
• 3-bit level information and 3-bit multi-path information
• Signal dependent soft muting circuit; externally adjustable
• Reference voltage output (FM mode only)
• 8-bit AM/FM frequency counter with selectable counter resolution
• Possibility to measure the AM IF frequency at 460 kHz (250 Hz resolution) and 10,7 MHz (500 Hz resolution)
• Reference frequency can be directly connected to the reference frequency output of a frequency synthesizer (TSA6057, 40 kHz) .