TEA6821T Datasheet, PDF (31/47 Pages) NXP Semiconductors – ICE car radio

Philips Semiconductors
ICE car radio
Preliminary specification
TEA6821T
A/D converters for level and multipath voltage
SYMBOL
PARAMETER
MIN.
TYP. MAX. UNIT
A/D converter for FM level information
The FM level information V_50-3 is A/D converted with 3 bit
∆V_50-4
AD conversion step size
FM stop
−
6
−
dB/step
∆V_stop
variation of stop level as function of V_42-4
A/D converter for AM level information
−
30
−
dB/V
The AM level information V_49-4 is A/D converted with 3 bit
∆V_49-4
AD conversion step size
AM stop
−
6
−
dB/step
∆V_stop
variation of stop level as function of V_43-4
A/D converter for multipath information
−
30
−
dB/V
The multipath information V_40-4 is A/D converted with 3 bit covering an IF₂ amplitude modulation range 0.15 ≤ m ≤ 0.9;
f_mod = 20 kHz
m
multipath conversion step 0
−
−
−
%
multipath conversion step 1
multipath conversion step 2
−
15
−
%
−
30
−
%
multipath conversion step 3
−
40
−
%
multipath conversion step 4
multipath conversion step 5
−
50
−
%
−
58
−
%
multipath conversion step 6
−
66
−
%
multipath conversion step 7
−
74
−
%
September 1993
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