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TDA3825 Datasheet(PDF) 2 Page - NXP Semiconductors

No. de pieza TDA3825
Descripción Electrónicos  Quasi split-sound circuit and AM demodulator
Download  18 Pages
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Fabricante Electrónico  PHILIPS [NXP Semiconductors]
Página de inicio  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA3825 Datasheet(HTML) 2 Page - NXP Semiconductors

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January 1993
2
Philips Semiconductors
Objective specification
Quasi split-sound circuit and AM
demodulator
TDA3845; TDA3845T
FEATURES
• Power supply from 5 V (200 mW) to 8 V source also an
alternative 12 V source (12 V not for TDA3845T)
• Gain controlled wideband IF amplifier (AC coupled with
three stages)
• High precision internal 90° phase shifter for quadrature
demodulator
• Amplitude detector for gain control which operates as a
peak detector for FM sound and as a mean level
detector for AM sound (switchable)
• In-phase wideband synchronous demodulator for AM
detection
• Stabilizer circuit for ripple rejection and constant output
signals
• ESD protection for all pins
• Suitable for all FM standards and L as well as L-accent
standard
• NICAM compatible.
GENERAL DESCRIPTION
The TDA3845 is a quasi split-sound IF circuit which is
designed to provide high performance television FM/AM
sound.
QUICK REFERENCE DATA
ORDERING INFORMATION
Note
1. SOT38-1; 1996 November 28.
2. SOT109-1; 1996 November 28.
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
positive supply voltage
VP1
pin 14
4.5
5.0
8.8
V
VP2
pin 11 (not for TDA3845T)
10.8
12.0
13.2
V
IP
supply current
40
mA
V1-16(RMS)
minimum IF input voltage (RMS value)
70
100
µV
IF control range
60
63
dB
V12-13(RMS)
intercarrier output voltage 5.5 MHz (RMS value)
70
100
mV
(S +W)/W
signal-to-weighted-noise ratio
(relative to 1 kHz; 50 kHz deviation)
at 5.5 MHz for 2T/20T
60
dB
at 5.742 MHz for 2T/20T
58
dB
V6-13(RMS)
AF output voltage AM (RMS value)
440
550
660
mV
(S +W)/W
signal-to-weighted-noise ratio; AM mode
56
dB
THD
total harmonic distortion; AM mode
12%
Tamb
operating ambient temperature
0
+70
°C
EXTENDED
TYPE NUMBER
PACKAGE
PINS
PIN POSITION
MATERIAL
CODE
TDA3845
16
DIL
plastic
SOT38(1)
TDA3845T
16
SO16
plastic
SOT109A(2)


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