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TDA3825 Datasheet(PDF) 2 Page - NXP Semiconductors |
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TDA3825 Datasheet(HTML) 2 Page - NXP Semiconductors |
2 / 18 page 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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