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TEA6849H
Datasheet
General description
The TEA6849H 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 double conversion receiver with integrated image rejection for IF1 and for IF2 capable of selecting US FM, US weather, Europe FM, East Europe FM and Japan FM bands; fully integrated dynamic selectivity at 450 kHz FM IF2; FM demodulator with dynamic threshold extension; centre frequency alignment of IF2 selectivity via the I2C-bus
- The tuning system includes VCO, crystal oscillator and PLL synthesizer on one chip.
Features
- FM mixer 1 for conversion of FM RF (65 to 108 MHz and US weather band) to IF of 10.7 MHz; the mixer provides inherent image rejection; for European and US FM band/WB (weather band) the mixer is driven with a ?high? injection Local Oscillator (LO); in Japan FM band and East Europe FM band the mixer is driven with a ?low? injection LO
- AM mixer 1 for conversion of AM RF to AM IF1 of 10.7 MHz
- LC tuner oscillator providing mixer frequencies for FM mixer and AM mixer 1
- AM mixer 2 for conversion of AM IF1 to AM IF2 of 450 kHz
- Crystal oscillator providing mixer frequencies for AM mixer 2 and FM mixer 2 and reference for synthesizer PLL, IF count, timing for Radio Data System (RDS) update and reference frequency for car audio signal processor ICs
- Fast synthesizer PLL tuning system with local control for inaudible RDS updating
- Timing function for RDS update algorithm and control signal output for car audio signal processor ICs (TEA688x, SAA77xx, TEF689x)
- I2C-bus adjustable FM MPX soft mute
- Digital alignment circuit for bus controlled matching of oscillator tuning voltage to FM antenna tank circuit tuning voltage
- AGC PIN diode drive circuit for FM RF AGC; AGC detection at FM mixer input; the AGC PIN diode drive can be activated by the I2C-bus as a local function for search tuning; AGC threshold is a programmable and keyed function switchable via the I2C-bus
- FM IF linear amplifier with high dynamic input range
- FM mixer 2 for conversion of FM IF1 to FM IF2 of 450 kHz with inherent image rejection
- Fully integrated dynamic selectivity and FM demodulator at IF2; improved sensitivity with dynamic threshold extension; centre frequency of IF2 selectivity alignment via the I2C-bus
- Level detector for AM and FM with temperature compensated output voltage; starting point and slope of level output is programmable via the I2C-bus
- AM cascode AGC stage and RF PIN diode drive circuit; AGC threshold detection at AM mixer 1 and IF2 AGC input; threshold for detection at mixer 1 input is programmable via the I2C-bus
- AM IF2 AGC and demodulator
- AM AF output switchable to provide AM IF2 for AM stereo decoder
- AM noise blanker with detection at IF1 and blanking at AM IF2
- Software controlled flag output
- Buffer output for weather band flag
- Adjacent channel detector and modulation detector for instantaneous bandwidth control of the integrated filter
- Flag and voltage output indicating the actual bandwidth.
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| TEA6849H/V1 | TEA6849H/V1-T | 9352 641 96518 | Volume production | SOT315-1
(LQFP80) | Reel Dry Pack, SMD, 13" | Standard Marking | TEA6849H/V1
| week 8, 2005 |
| TEA6849H/V1 | TEA6849H/V1 | 9352 641 96557 | Volume production | SOT315-1
(LQFP80) | Tray Dry Pack, Bakeable, Multiple | Standard Marking | TEA6849H/V1
| week 8, 2005 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| TEA6849H/V1 | 9352 641 96518 | Order samples | ||||||
| TEA6849H/V1 | 9352 641 96557 | not available |
Design support
Application Notes
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