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PDF TEF6862 Data sheet ( Hoja de datos )
| Número de pieza | TEF6862 | |
| Descripción | Car Radio Enhanced Selectivity Tuner | |
| Fabricantes | NXP Semiconductors | |
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TEF6862
Car Radio Enhanced Selectivity Tuner (CREST)
Rev. 01 — 14 September 2006
Product data sheet
1. General description
The TEF6862 is a single-chip car radio tuner for AM, FM and weather band reception
providing AM double conversion for LW, MW and full range SW (11 m to 120 m bands)
with IF1 = 10.7 MHz and IF2 = 450 kHz.
FM double conversion to IF1 = 10.7 MHz and IF2 = 450 kHz with integrated image
rejection for both IF1 and IF2; integrated IF filter with variable bandwidth and automatic
bandwidth control algorithm with flexibility via the I2C-bus; capable of US FM, Europe FM,
Japan FM, East Europe FM and weather band reception; all FM bands can be selected
using high injection LO or low injection LO in the FM mixer 1.
Tuning system including crystal oscillator, VCO, PLL synthesizer and state machine for
timing uncritical control of search, preset change and AF check via microcontroller.
2. Features
I High dynamic range FM front-end mixer for conversion of FM RF (65 MHz to 108 MHz
and USA weather band) to an IF frequency of 10.7 MHz; mixer provides inherent
image rejection which can be switched from low injection LO to high injection LO via
the I2C-bus
I FM front-end AGC PIN diode drive circuit; AGC detection at the FM font-end mixer
input and the IF filter input; AGC threshold for detection at the mixer input is
programmable and keyed AGC function can be selected via the I2C-bus; the AGC PIN
diode drive can be activated by the I2C-bus for a search tuning in local mode; in
AM mode the AGC PIN diode drive can be activated by the I2C-bus if required;
information on amount of PIN diode AGC is available via the I2C-bus
I FM front-end mixer includes +6 dB gain setting via the I2C-bus
I FM second mixer for conversion of IF1 10.7 MHz to IF2 450 kHz including inherent
image rejection; the gain can be controlled via the I2C-bus
I Integrated FM channel selection filter with continuous variable bandwidth providing
simultaneous low distortion and high selectivity with only one external ceramic filter;
improved sensitivity with dynamic threshold extension can be enabled via the I2C-bus
I Fully integrated FM demodulator with very low distortion
I Digital bandwidth control algorithm with detection on adjacent channel information,
deviation, detuning and level with customer flexibility via the I2C-bus
I Digital alignment circuit for bus controlled adjustment of oscillator tuning voltage to two
FM antenna tank circuit tuning voltages; AM and FM level start and slope alignment;
IF filter and demodulator center frequency alignment
I AM and FM level detection (signal strength indication)
I Separate RF input to FM front-end mixer for weather band
I Flag or voltage output indicators for actual IF bandwidth information
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Philips Semiconductors
6. Pinning information
6.1 Pinning
TEF6862
Car Radio Enhanced Selectivity Tuner (CREST)
AMIF2IN 1
AMIF2DEC 2
TAMIFAGC 3
AMMIX2OUT1 4
AMMIX2OUT2 5
IF1GND 6
IF1IN 7
IF1DEC 8
i.c. 9
TESTIFOUT 10
MIX1OUT2 11
MIX1OUT1 12
VCCRF 13
i.c. 14
AMMIX1IN 15
AMMIX1DEC 16
TEF6862HL
48 VREF
47 VTCM
46 VTCENTRE
45 IF2GND
44 V60
43 VCC
42 VCCPLL
41 FREF
40 VCCVCO
39 OSCTNK
38 OSCFDB
37 VCOGND
36 CPOUT
35 VTUNE
34 DAAIN
33 PLLGND
001aae377
Fig 2. Pin configuration for LQFP64
6.2 Pin description
Table 3. Pin description
Symbol
Pin
AMIF2IN
1
AMIF2DEC
2
TAMIFAGC
3
AMMIX2OUT1 4
AMMIX2OUT2 5
IF1GND
6
IF1IN
7
IF1DEC
8
i.c. 9
Description
AM IF2 input
decoupling for AM IF2 input
time constant of AM IF AGC
AM mixer 2 output 1
AM mixer 2 output 2
IF1 ground
AM and FM mixer 2 input
AM and FM mixer 2 decoupling
internally connected; leave open
TEF6862_1
Product data sheet
Rev. 01 — 14 September 2006
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
5 of 65
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Philips Semiconductors
TEF6862
Car Radio Enhanced Selectivity Tuner (CREST)
Table 4.
Code
ACK-s
ACK-m
NA
MSA
Data
P
Description of I2C-bus format …continued
Description
acknowledge generated by the slave
acknowledge generated by the master
not acknowledge
mode and subaddress byte
data byte
STOP condition
8.1 Read mode
Read data is loaded into the output register at the preceding acknowledge clock pulse.
Table 5. Read register overview
Data byte
0h
1h
2h
3h
4h
5h
Name
IFCOUNTER
TUNER
ACDREAD
LEVEL
ID
TEMP
Reference
Section 8.1.1
Section 8.1.2
Section 8.1.3
Section 8.1.4
Section 8.1.5
Section 8.1.6
8.1.1 Read mode: data byte IFCOUNTER
Table 6. IFCOUNTER - data byte 0h bit allocation
7654
IFCM1
IFCM0
IFCS
IFCA
3
IFC3
2
IFC2
1
IFC1
0
IFC0
Table 7.
Bit
7 and 6
5
4
3 to 0
IFCOUNTER - data byte 0h bit description
Symbol
Description
IFCM[1:0] IF counter mode
00 = no new counter result available (IF counter value is last result or reset state)
01 = new counter result available (IF counter value is new result)
10 = counter result from AFU (IF counter value is AF result)
11 = POR is detected, the I2C-bus data is reset to POR state
IFCS
IF counter sign
0 = the IF counter result indicates a positive RF frequency
1 = the IF counter result indicates a negative RF frequency
IFCA
IF counter accuracy
0 = IF counter result with 1 kHz resolution in FM mode and 0.5 kHz resolution in AM mode
1 = IF counter result with 8 kHz resolution in FM mode and 4 kHz resolution in AM mode
IFC[3:0]
IF counter result; see Table 8
TEF6862_1
Product data sheet
Rev. 01 — 14 September 2006
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
11 of 65
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TEF6862.PDF ] | |
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