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TDA3845T

NXP
Part Number TDA3845T
Manufacturer NXP
Description Quasi split-sound circuit and AM demodulator
Published Apr 23, 2005
Detailed Description INTEGRATED CIRCUITS DATA SHEET TDA3845; TDA3845T Quasi split-sound circuit and AM demodulator Objective specification F...
Datasheet PDF File TDA3845T PDF File

TDA3845T
TDA3845T

Overview
INTEGRATED CIRCUITS DATA SHEET TDA3845; TDA3845T Quasi split-sound circuit and AM demodulator Objective specification File under Integrated Circuits, IC02 January 1993 Philips Semiconductors Objective specification Quasi split-sound circuit and AM demodulator 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 TDA3845; TDA3845T • 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 SYMBOL VP1 VP2 IP V1-16(RMS) V12-13(RMS) (S +W)/W pin 14 pin 11 (not for TDA3845T) supply current minimum IF input voltage (RMS value) IF control range intercarrier output voltage 5.
5 MHz (RMS value) signal-to-weighted-noise ratio (relative to 1 kHz; 50 kHz deviation) at 5.
5 MHz for 2T/20T at 5.
742 MHz for 2T/20T V6-13(RMS) (S +W)/W THD Tamb AF output voltage AM (RMS value) signal-to-weighted-noise ratio; AM mode total harmonic distortion; AM mode operating ambient temperature − − 440 − − 0 60 58 550 56 1 − − − 660 − 2 +70 dB dB mV dB % °C PARAMETER positive supply voltage 4.
5 10.
8 − − 60 70 5.
0 12.
0 40 70 63 100 8.
8 13.
2 − 100 − − V V mA µV dB mV MIN.
TYP.
MAX.
UNIT ORDERING INFORMATION EXTENDED TYPE NUMBER TDA3845 TDA3845T Note 1.
SOT38-1; 1996 November 28.
2.
SOT109-1; 1996 November 28.
PACKAGE PINS 16 16 PIN POSITION DIL SO16 MATERIAL plastic plastic CODE SOT38(1) SOT109A(2) January 1993 2 Philips...


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