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TDA7338 Datasheet(PDF) 7 Page - STMicroelectronics

Part # TDA7338
Description  STEREO DECODER
PDF  11 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7338 Datasheet(HTML) 7 Page - STMicroelectronics

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80KHz LP
SIGNAL PATH
ATC
AUTOMATIC
THRESHOLD
CONTROL
PEAK+VTH
RECT-PEAK
BUF
PEAK
AMP
RECT
-
+
PEAK COMP
REF.
BLANK COMP
ADDITIONAL THRESHOLD
CONTROL
(ATC-SB)
40
µs
LEFT
RIGHT
to OUTPUTS
MPX IN
VR
VSB
CPEAK
47nF
CBLANK
330pF
D95AU368
-
+
140KHz HP
120KHz HP
LEVEL
2V
7V
THRESHOLD L/H
ADDITIONAL THRESHOLD
CONTROL on/off
PROG
VS
-
+
BLEND
ON/OFF
0.1V
BLEND
CONTROL
Figure 3: Block Diagram of the Noise Blanker
100mV
60mV
NOISE ADJUSTED
TRIG. THRESHOLD
MIN. TRIG. THRESHOLD
300mV
180mV
0.9V
VTH
1.5V
VPEAK(V)
D95AU369
Figure 4: Trigger Threshold vs. VPEAK
Table 1: Programming of the Noiseblanker
PIN 1 (PROG)
Trigger Threshold
Peak Voltage Control By Fieldstrength
GND
LOW
ON
OPEN
HIGH
ON
VDD
HIGH
OFF
TDA7338
7/11



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