DESCRIPTION

The TDA7420 I2C bus controlled multifunction audio processor contains all signal processing blocks of a high performance car radio, including audioprocessor, stereodecoder, noise blanker, different mute functions, cassette preamplifier and AMS function.

CASSETTE PREAMPLIFIER:

■ FORWARD/REVERSE INPUTS GROUND COMPATIBLE
■ INTERNAL SWITCHES FOR EQUALIZATION
■ INTERNAL ADJUSTMENT FOR TRAKING
■ INTERNAL ADJUSTMENT FOR OUTPUT

AMS:

■ INPUT GAIN CONTROL
■ ADJUSTABLE GAIN VERSUS FREQUENCY

AUDIOPROCESSOR:

■ INPUTS: 1 FULLY DIFFERENTIAL, 1 DIFFERENTIAL, 1 STEREO AND 1 MONO
■ INPUT GAIN FROM 0 TO 15dB (1dB STEP)
■ VOLUME CONTROL FROM +16 TO -63dB (1dB STEP)
■ BASS AND TREBLE CONTROL FROM -18 TO 18dB (1dB STEP)
■ DIRECT MUTE, SOFT MUTE AND RADIO MUTE
■ FOUR INDEPENDENT OUTPUT STAGES:
- ATTENUATION CONTROL FROM 0 TO -79dB (1dB STEP)
- BEEP CONTROL (ON/OFF, FRONT/REAR)

STEREO DECODER:

■ ROLL-OFF ADJUSTMENT
■ SELECTABLE DEEMPHASIS
■ 19KHz CANCELLATION
■ HIGH CUT CONTROL
■ STEREO BLEND

NOISE BLANKER

■ AUTOMATIC THRESHOLD CONTROL AND PROGRAMMABLE TRIGGER THRESHOLD
■ INTEGRATED HIGH PASS FILTER
■ PACKAGE: TQFP64 (14x14)