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PDF TEF6901A Data sheet ( Hoja de datos )

Número de pieza TEF6901A
Descripción a single chip car radio integrated circuit
Fabricantes NXP Semiconductors 
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TEF6901A
Integrated car radio
Rev. 01 — 2 February 2006
Preliminary data sheet
1. General description
The TEF6901A is a single chip car radio integrated circuit with FM/AM tuner, stereo
decoder, weak signal processing and audio processing. Radio Data System (RDS)/Radio
Broadcast Data System (RBDS) demodulator for radio data reception is included.
FM tuner with double conversion to IF1 = 10.7 MHz and IF2 = 450 kHz with integrated
image rejection for both IF1 and IF2; integrated channel filter with variable bandwidth
control; capable of US FM, Europe FM, Japan FM and Eastern Europe FM. AM tuner with
double conversion to IF1 = 10.7 MHz and IF2 = 450 kHz; capable of Long Wave (LW),
Medium Wave (MW) and full range Short Wave (SW) (11 m to 120 m bands).
Multiplex (MPX) stereo decoder, ignition noise blanker and extensive weak signal
processing.
Audio processing with flexible source selection, volume, balance, fader, input gain control
and inaudible tuning mute. Integrated audio filters for bass and treble and loudness control
function.
The device can be controlled via the fast-mode I2C-bus (400 kHz) and includes
autonomous tuning functions for easy control without microcontroller timing. No manual
alignments are required.
2. Features
s FM Radio Frequency (RF) front-end with large dynamic range
s Integrated FM channel filter with controlled bandwidth
s Fully integrated FM demodulator
s Fully integrated stereo decoder with high immunity for birdy noise
s FM noise blanker with adaptive detection at MPX and level
s Signal quality detection: level, AM wideband, frequency deviation, ultrasonic
noise/adjacent channel
s FM weak signal processing: stereo blend, high cut control and soft mute
s AM RF Automatic Gain Control (AGC) control circuit for external cascode AGC and
PIN diode AGC
s Dual AM noise blanking system
s AM weak signal processing: high cut control and soft mute
s Low phase noise local oscillator
s In-lock detection for optimized adaptive Phase-Locked Loop (PLL) tuning speed
s Crystal oscillator reference with low harmonics
s Inaudible soft slope tuning mute for AM and FM
s Sequential state machine supporting each tuning action

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TEF6901A pdf
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6. Pinning information
6.1 Pinning
TEF6901A
Integrated car radio
CPOUT 1
VTUNE 2
VCCPLL 3
PLLGND 4
i.c. 5
VTCM 6
VTC 7
IFMAGC 8
TRFAGC 9
DAAOUT 10
FMMIX1IN1 11
FMMIX1IN2 12
VCCRF 13
RFGND 14
IAMAGC 15
i.c. 16
TEF6901AH
48 LFOUT
47 RFOUT
46 LROUT
45 RROUT
44 ADDR
43 SCL
42 SDA
41 DGND
40 RDCL
39 RDDA
38 RDSGND
37 LEVEL
36 VCC
35 GND
34 VREF
33 V60
008aaa003
Fig 2. Pin configuration for QFP64
6.2 Pin description
Table 3: Pin description
Symbol
Pin Description
CPOUT
1 charge pump output
VTUNE
2 tuning voltage; 3 mA charge pump output
VCCPLL
3 tuning PLL supply voltage
PLLGND
4 PLL ground
i.c. 5 internally connected; leave open
VTCM
6 Intermediate Frequency (IF) filter reference voltage
VTC
7 IF filter center voltage
IFMAGC
8 PIN diode current FM AGC
TRFAGC
9 FM and AM RF AGC time constant
DAAOUT
10 antenna Digital Auto Alignment (DAA) output
TEF6901A_1
Preliminary data sheet
Rev. 01 — 2 February 2006
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
5 of 107

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TEF6901A arduino
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TEF6901A
Integrated car radio
In the weak signal processing block these signals are combined in specific ways and used
for the generation of control signals for soft mute, stereo blend (stereo noise control, SNC)
and HCC. Detector time constants of soft mute, HCC and SNC can be selected
independently.
In AM mode soft mute and HCC are controlled by the average value of the level voltage.
7.26 Audio step interpolation
The tone/volume blocks of source selector, volume/balance, bass/loudness, fader and
output mute include the Audio Step Interpolation (ASI) function. This minimizes audible
pops by smoothing the transitions in the audio signal during the switching of the controls.
7.27 Source selector
The source selector selects one out of several input sources:
One internal stereo signal (AM/FM tuner)
Seven input pins allow many combinations of external sources by means of flexible
input selection
Three of the seven input pins can connect to:
1 stereo signal with ground input for common mode rejection (CD)
1 stereo signal and 1 mono signal
Four more input pins can connect to:
1 stereo signal (AUX) and 1 mono signal with common mode rejection or
differential input (PHONE)
1 stereo signal (AUX) and 2 mono signals (e.g. NAV and BEEP)
2 stereo signals (AUX and AUX-2)
1 stereo signal with common mode rejection (CD-2) and 1 mono signal (e.g.
BEEP)
1 stereo signal with differential input (CD-symmetrical)
7.28 VU-meter read
The input audio level of external sources can read out via the I2C-bus. Audio level
information is available on a logarithmic scale. In radio mode the AM or FM modulation
index is available in the same way.
7.29 Volume and balance
The volume/balance control is used for volume setting and also for balance adjustment.
The control range of the volume/balance control is between +20 dB and 75 dB in steps
of 1 dB.
7.30 CD compression
Dynamic volume compression is available for external input sources. This option is
generally used for audio from CD or other digital formats to reduce the very high dynamic
range of these signals into a range suitable for the car environment.
TEF6901A_1
Preliminary data sheet
Rev. 01 — 2 February 2006
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
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