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TDA3843 Folha de dados(PDF) 6 Page - NXP Semiconductors |
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TDA3843 Folha de dados(HTML) 6 Page - NXP Semiconductors |
6 / 10 page March 1991 6 Philips Semiconductors Product specification Sound-IF circuit for TV AM-sound standard L and L’ TDA3843 Notes to the characteristics 1. Using the power supply voltage range VP1 = 5 to 8 V, the performance will not essentially change. Using the power supply voltage range, VP2 = 12 V, the performance will be comparable with the performance at VP1 = 5 to 8 V. The unused power supply pin must not be connected. 2. Start of gain control (low IF input signal) at −3 dB AF signal reduction at pin 6. 3. End of gain control (high IF input signal) at +1 dB AF signal expansion at pin 6. 4. Sound carrier = 32.4 MHz modulated with f = 1 kHz and a modulation depth m = 80%. IF input signal V1-16 = 10 mV (RMS value). 5. A maximum value of 100 kHz is guaranteed, but, typically a maximum value of 700 kHz is found. 6. The capacitor at pin 4 may be omitted, but then the S +W/W figure will be degraded by up to 8 dB in the IF voltage range 1 mV up to 100 mV. 7. If a higher AC output current is required, an external resistor must be connected from the output to ground. This is to increase the bias current of the emitter follower (note, the maximum allowable DC output current). Ripple rejection Vripple < 200 mV (peak-to-peak), 50 to 100 Hz, measured at 70 Hz AF signal output αRR = V ripple on VP/Vripple on VO αRR 30 40 − dB IF filter Proposal for sound carrier filter for L-standard Fig.5 PARAMETER CONDITIONS SYMBOL MIN. TYP. MAX. UNIT |
Nº de peça semelhante - TDA3843 |
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Descrição semelhante - TDA3843 |
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