Datasheet

TEF6901A_3 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 03 — 20 March 2008 61 of 107
NXP Semiconductors
TEF6901A
Integrated car radio
1V=0dBV.
Dynamic compression is realized by attenuation of the volume setting. To match the audio
amplitudes with and without compression a higher volume (VOL) setting should be selected
when compression is activated. The VOL correction value used defines the positioning of the
compression characteristic high signal attenuation and low signal amplification.
In this example: COMP = 0: VOL = ‘user volume’; COMP = 1: VOL = ‘user volume’ + 15.
Fig 36. Example of input to output compression
Table 83. Volume setting
VOL6 VOL5 VOL4 VOL3 VOL2 VOL1 VOL0 Volume (dB)
000000028
[1]
000000127
[1]
000001026
[1]
000001125
[1]
000010024
[1]
000010123
[1]
000011022
[1]
000011121
[1]
000100020
[1]
000100119
[1]
000101018
[1]
000101117
[1]
000110016
[1]
000110115
[1]
000111014
[1]
000111113
[1]
001000012
[1]
001000111
[1]
001001010
00100119
line input (dBV)
−60 200 +6−40 −20
001aab549
−40
−60
−20
0
line output
(dBV)
−80
15 dB
COMP = 1;
VOL = −5 dB
COMP = 0;
VOL = −20 dB