TEA6880 View Datasheet(PDF) - Philips Electronics

Part Name

Description

MFG CO.

TEA6880

Up-level Car radio Analog Signal Processor CASP

Philips Electronics 

Philips Semiconductors

Up-level Car radio Analog Signal

Processor (CASP)

Product specification

TEA6880H

7.5.1 SOURCE SELECTOR

The source selector allows the selection between

6 sources:

• 2 external stereo inputs (ALI, ARI, BLI and BRI)

• 1 external symmetrical stereo input (CLIP, CRIP and

CCOM)

• 1 external symmetrical mono input (MONOP and

MONON)

• 1 internal stereo input (AM/FM)

• 1 chime/diagnostic mono input (CHIME).

Via the chime/diagnostic mono input a chime input signal

can be sent to any audio output, at any volume level.

7.5.2 LOUDNESS

The output of the source selector is fed into the loudness

circuit via the external capacitors CKVL (pins LOPO and

LOPI) and CKVR (pins ROPO and ROPI). Depending on

the external circuits for the left and the right channel only a

bass boost or bass and treble boost is available. With the

external circuits shown in Figs 13 and 15 the curves from

Figs 14 and 16 will be obtained (without influence of CKVL

respectively CKVR).

7.5.3 VOLUME 1

The volume 1 control follows behind the loudness circuit.

The control range of volume 1 is between +20 and −36 dB

in steps of 1 dB.

7.5.4 TREBLE

The output signal of the volume 1 control is fed into the

treble control stage. The control range is between

+14 and −14 dB in steps of 2 dB. Fig.20 shows the control

characteristic with external capacitors of 10 nF.

7.5.5 BASS

The bass control is the next stage. The characteristic of the

bass curves depends upon the external circuits at

pins LBO/LBI (left channel) and RBO/RBI (right channel)

and also upon the setting of BSYM bit (MSB of the bass

control byte). With BSYM = 1, an equalizer characteristic

and with BSYM = 0, a shelving characteristic is obtained.

Figures 17 and 18 show the bass curves with an external

circuit of 2 × 220 nF and R = 3.3 kΩ for each channel with

different values for BSYM. Figure 19 shows the bass

curves with an external capacitor of 47 nF for each

channel and BSYM = 0, for boost and cut.

7.5.6 VOLUME 2

The four volume 2 blocks are located at the end of the

tone/volume control. In addition to volume control (same

settings as volume 2) also the balance and fader functions

are performed by individual attenuation offsets for the four

attenuators. The control range of these attenuators is

56 dB in steps of 1 dB and additional the steps −58.5 dB,

−62 dB, −68 dB, and a mute step.

7.5.7 RSA SELECTOR

The RSA selector provides the possibility to select an

alternative source for the rear channels. In this event rear

channels are only controlled by volume 2 function.

7.5.8 CHIME ADDER

With the chime adder circuit the chime input signal can be

summed with the left front and/or right front audio, or be

turned off.

2000 May 08

12

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