TEA6843HL

Product Summary

The TEA6843HL is a New In Car Entertainment (NICE) extended car radio. The TEA6843HL is a single IC with car radio tuner for AM, FM and Weather Band (WB) intended for microcontroller tuning with the I2C-bus. It provides the following functions: AM double conversion receiver for LW, MW and SW (31 m, 41 m and 49 m bands) with IF1 = 10.7 MHz and IF2 = 450 kHz, FM single conversion receiver with integrated image rejection for IF = 10.7 MHz capable of selecting US FM, US weather, Europe FM, East Europe FM and Japan FM bands, The tuning system includes FM mixer, AM mixer 1, AM mixer 2, crystal oscillator, VCO and PLL synthesizer on one chip.

Parametrics

TEA6843HL absolute maximum ratings: (1)VDDA1 analog supply voltage 1 for IF amplifier 1 and 2: -0.3V to +10V; (2)VDDA2 analog supply voltage 2 for FM mixer and AM mixer 1: -0.3 +10V; (3)VDDA3 analog supply voltage 3 for tuning PLL: -0.3V to +10 V; (4)VDDA4 analog supply voltage 4 for VCO: -0.3V to +10 V; (5)VDDA5 analog supply voltage 5 for on-chip power supply: -0.3V to +6.5V; (6)VDDA6 analog supply voltage 6 for on-chip power supply: -0.3V to +10 V; (7)VDDD digital supply voltage -0.3V to +6.5V; (8)DVDD8.5-DD5 difference between any 8.5V supply voltage and any; (9)5 V supply voltage note 1: -0.3V; (10)Tstg storage temperature: -55℃ to +150℃; (11)Tamb ambient temperature: -40℃ to +85℃; (12)Ves electrostatic handling voltage note 2: -200 to +200 V; (13)note 3 -2000 to +2000 V.

Features

TEA6843HL features: (1)FM mixer for conversion of FM RF from 65 to 108 MHz to IF of 10.7 MHz; the mixer provides inherent image rejection; (2)FM RF mixer can be set to receive weather band radio up to 162.55 MHz; (3)Buffer output for weather band flag; (4)AM mixer 1 for conversion of AM RF to AM IF1 of 10.7 MHz; (5)LC tuner oscillator providing mixer frequencies for FM mixer and AM mixer 1; (6)AM mixer 2 for conversion of AM IF1 to AM IF2 of 450 kHz; (7)Crystal oscillator providing mixer frequencies for AM mixer 2 and reference for synthesizer PLL, IF count, timing for inaudible Radio Data System (RDS) update and reference frequency for car audio signal processor ICs; (8)Fast synthesizer PLL tuning system with local control for inaudible RDS updating; (9)Timing function for RDS update algorithm and control signal output for car audio signal processor ICs (TEA688x, SAA77xx) or car radio integrated signal processor IC (TEF689x); (10)Digital auto alignment circuit for conversion of LC oscillator tuning voltage to controlled alignment voltage of FM antenna tank circuit; (11)AGC PIN diode drive circuit for FM RF AGC; AGC detection at FM mixer input; the AGC PIN diode current can be set to a fixed value to allow local function for search tuning; AGC threshold is a programmable and keyed function switchable via the I2C-bus; (12)FM IF linear amplifiers with high dynamic input range; (13)FM quadrature demodulator with automatic centre frequency adjustment and Total Harmonic Distortion (THD) compensation and level driven soft mute; soft mute characteristic is adjustable via the I2C-bus.

Diagrams