Datasheet

TEF6901A_3 © NXP B.V. 2008. All rights reserved.
Product data sheet Rev. 03 — 20 March 2008 88 of 107
NXP Semiconductors
TEF6901A
Integrated car radio
Setting of time constants for SNC, MUTE and HCC
t
USN(attack)
USN detector attack time soft mute and SNC - 1 - ms
t
USN(recovery)
USN detector recovery
time
soft mute and SNC - 1 - ms
∆USS USN detector
desensitization
USN sensitivity setting (USS)
versus level voltage (USN
sensitivity setting is
automatically reduced as level
voltage decreases)
V
LEVEL
> 1.25 V - - 3 -
1.25 V > V
LEVEL
> 1.125 V - - 2 -
1.125 V > V
LEVEL
> 1.0 V - - 1 -
1.0 V > V
LEVEL
-- 0-
t
WAM(attack)
WAM detector attack
time (SNC)
-1- ms
t
WAM(recovery)
WAM detector recovery
time (SNC)
-1- ms
t
peak(USN)(attack)
peak detector attack time
for USN read-out via
I
2
C-bus
-1- ms
t
peak(USN)(recovery)
peak detector recovery
time for USN read-out via
I
2
C-bus
-10- ms
t
peak(WAM)(attack)
peak detector attack time
for WAM read-out via
I
2
C-bus
-1- ms
t
peak(WAM)(recovery)
peak detector recovery
time for WAM read-out
via I
2
C-bus
-10- ms
Table 111. Dynamic characteristics of the sound processor …continued
V
CC
= 8.5 V; T
amb
=25 ° C; see Figure 43; all AC values are given in RMS; treble: 10 kHz filter frequency; treble = 0 dB;
bass: 60 Hz filter frequency; bass = 0 dB; f
audio
= 1 kHz; G
vol
= 0 dB; G
fader
= 0 dB; loudness off; standard output gain
(byte OUTPUT; bit OUTA = 0); R
L
= 10 k Ω ; C
L
= 1 nF; unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit