TDA7461N Datasheet, PDF (16/31 Pages) STMicroelectronics – CAR RADIO SIGNAL PROCESSOR

TDA7461N
MULTIPATH DETECTOR
Internal 19kHz bandpass filter
Programmable bandpass and rectifier gain
Two pin solution fully independent usable for
external programming
Selectable internal influence on Stereoblend
ELECTRICAL CHARACTERISTICS (continued)
Symbol
fCMP
GBPMP
GRECTMP
ICHMP
IDISMP
Parameter
Center frequency of Multipath-
Bandpass
Bandpass Gain
Rectifier Gain
Rectifier Charge Current
Rectifier Discharge Current
Test Condition
stereodecoder locked on pilot
tone
bits D2, D1 configuration byte = 00
bits D2, D1 configuration byte = 01
bits D2, D1 configuration byte = 10
bits D2, D1 configuration byte = 11
bits D7, D6 configuration byte = 00
bits D7, D6 configuration byte = 01
bits D7, D6 configuration byte = 10
Min.
Typ.
19
6
16
12
18
7.6
4.6
0
1
1.5
Max.
Unit
KHz
dB
dB
dB
dB
dB
dB
dB
µA
mA
Figure 17. Block diagram of the stereodecoder
MPX
100K
INGAIN
3.5 ... 11dB
STEP 2.5dB
INFILTER
LP 80KHz
4.th ORDER
PLL +
PILOT-DET.
F19
F38
STEREO
NOISE BLANKER
HOLDN
D97AU762
DEMODULATOR
- PLOT CANC
- ROLL-OFF COMP.
- LP 25KHz
DEEMPHASIS
+ HIGHCUT
t=50 or 75µs
FM_L
FM_R
SB CONTROL
REF 5V
VSBL
HC
CONTROL
D
A
VHCCH
VHCCL
MPINFL
LEVEL INPUT
LEVEL INTERN
LP 2.2KHZ
-
1.th ORDER
LEVEL
GAIN 0..10dB
MULTIPATH
DETECTOR
MPIN
MPOUT
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