TEA6886HL

General description

The TEA6886HL is a monolithic bipolar integrated circuit providing the stereo decoder function and ignition noise blanking facility combined with source selector and tone/volume control for AM/FM car radio applications. The device operates with a power supply voltage range from 7.8 to 9.2 V and a typical current consumption of 40 mA.

Features

1.1 General

• I²C-bus compatible
• Digital alignment/adjustment via I²C-bus:
• FM noise blanker sensitivity
• FM stereo noise canceller
• FM High Cut Control (HCC)
• FM stereo separation.
• FM audio processing hold for RDS updating; holds the detectors for the FM weak signal processing in their present state
• FM bandwidth limiting; limits the bandwidth of the FM audio signal with external capacitors
• AM stereo input; AM stereo audio can be fed in at the pins for the de-emphasis capacitors; this will provide 8 dB of gain to the AM audio.

1.2 Stereo decoder and noise blanking

• FM stereo decoder
• Accepts FM multiplex signal and AM audio at input
• Pilot detector and pilot canceller
• De-emphasis selectable between 75 and 50 us
• AM noise blanker: impulse noise detector and an audio hold.

1.3 Weak signal processing

• FM weak signal processing: six signal condition detectors, soft mute, stereo noise canceller (blend) and high cut control (roll-off).

1.4 Audio pre-amplifier

• Source selector for 6 sources: 2 stereo inputs external (A and B), 1 symmetrical stereo input (C), 1 symmetrical mono input (D), 1 internal stereo input (AM or FM) and 1 chime/diagnostic mono input
• Volume 1 control from +20 to -56 dB in 1 dB steps; programmable 20 dB loudness control included
• Volume 2 control from 0 to -56 dB in 1 dB steps, -56, -58.5, -62, -68 dB and mute
• Programmable loudness control with bass boost as well as bass and treble boost
• Treble control from -14 to +14 dB in 2 dB steps
• Bass control from -18 to +18 dB in 2 dB steps with selectable characteristic
• Analog Step Interpolation (ASI) minimizes pops by smoothing out the transitions in the audio signal when a switch is made
• Audio Blend Control (ABC) minimizes pops by automatically incrementing the volume and loudness controls through each step between their present settings and the new settings
• Rear Seat Audio (RSA) can select different sources for the front and rear speakers
• Chime input: can be sent to any audio output, at any volume level
• Chime adder circuit: chime input can also be summed with left front and/or right front audio, or be turned off.

Block diagrams/pinning

Design support

Application Notes

AN00001_2; TEA6848H a nice radio with circumstantial controlled selectivity (19-Nov-02)

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