Philips Semiconductors
In Car Entertainment (ICE) car radio
Preliminary specification
TEA6823T; TEA6825T
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP.
Unweighted voltage level
V50-4
unweighted voltage level
∆V50-4/∆V37-35 slope of unweighted voltage level
see Fig.9; V38 = 2.52 V
V37-35 ≤ 2.5 µV
V37-35 = 1.0 mV
100 µV (RMS) ≤ V37-35
< 300 mV
temperature
compensation off
∆V50-4/VK
temperature dependence
temperature
compensation on
V37-35 = 1 mV
temperature
compensation off
temperature
compensation on
I50(max)source
I50(max)sink
Ro50
maximum output source current
maximum output sink current
output resistance
ADJUSTMENT OF UNWEIGHTED VOLTAGE LEVEL AND Vmute/AML; note 1
∆V50
adjusting range voltage
V37-35 = 10 mV (RMS)
V38-4
∆V50-4/∆V38-4
internal bias voltage
adjusting gain
Ri38
input resistance
MUTING DEPENDENCE ON ADJUST OF LEVEL UNWEIGHTED VOLTAGE; note 2
V43/V47
∆-----V--∆--4--V3----⁄-4--V9----4---7-
start of mute
mute slope
V49/V21 = 0.625
V43/V47 = −6 dB
1.6 2.2
2.7 3.4
0.75 0.9
0.6 0.75
− 5.0
− 2.0
0.3 −
−50 −
−−
−1.8 −
− 2.6
− −0.9
− 80
13
− 25
Soft mute, time constant control, mono/stereo blend and high-cut control; see Fig.22
MUTE VOLTAGE; note 3
V49-4
mute voltage
∆V49-4/∆V37-35 slope of mute voltage
∆V49-4/VK
temperature dependency
V38 = 2.52 V
V37-35 < 2.5 µV
V37-35 = 1.0 mV
100 µV (RMS) ≤ V37-35
< 300 mV
V37-35 = 1 mV
1.8 2.2
2.7 3.4
0.75 0.9
− 5.0
MAX. UNIT
3.0 V
4.7 V
1.05 V/20 dB
0.9 V/20 dB
−
mV/VK
−
mV/VK
−
mA
−
µA
300 Ω
+1.8 V
−
V
−
−
−
kΩ
7
dB
−
dB/V
3.2 V
4.7 V
1.05 V/20 dB
−
mV/VK
1998 Mar 24
10