TEF6902AH/V2 NXP Semiconductors, TEF6902AH/V2 Datasheet - Page 11

• Manufacturer Part Number: TEF6902AH/V2
• Description: Tuners TUNER ASP ONECHIP
• Manufacturer: NXP Semiconductors

Specifications of TEF6902AH/V2

• Mounting Style: SMD/SMT
• Package / Case: PQFP-64
• Minimum Operating Temperature: - 40 C
• Maximum Operating Temperature: + 85 C
• Lead Free Status / RoHS Status: Compliant
• Other names: TEF6902AH/V2,557

NXP Semiconductors
TEF6902A_3
Product data sheet
7.26 Audio step interpolation
7.27 Source selector
7.28 VU-meter read
7.29 Volume and balance
7.30 CD compression
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 (SNC = stereo noise
control) 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.
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.
The source selector selects one out of several input sources:
The input audio level of external sources can read out via the I
information is available on a logarithmic scale. In radio mode the AM or FM modulation
index is available in the same way.
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.
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.
•
•
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
– 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.
– 1 stereo signal with differential input (CD-symmetrical)
differential input (PHONE)
BEEP)
Rev. 03 — 19 March 2008
2
C-bus. Audio level
TEF6902A
Integrated car radio
© NXP B.V. 2008. All rights reserved.
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