la3370 Sanyo Semiconductor Corporation, la3370 Datasheet
la3370
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la3370 Summary of contents
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... PLL FM Multiplex Stereo Demodulator Overview The LA3370 is a multiplex IC for FM car stereo, and it has the following 2 functions through its utilization of the IF meter output voltage, etc. 1. Stereo noise control (SNC) under which the noise particular to the FM stereo unit in the weak electric field is reduced smoothly. ...
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... SNC output voltage V O sub HCC output attenuation A tt HCC HCC 2 Power ripple rejection Rr VCO stopping voltage V CO stop Channel balance CH Ba LA3370 Conditions Ta ≤ 45°C Conditions Conditions Mono = 300mV Main L+R = 90%, pilot = 10% Pilot = 30mV Sub THD = 0.6V, L−R = 90%, pilot = 10 0.1V, L− ...
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... Composite input * : 100µF across pin 4 and GND is for measurement of SNC output voltage, HCC output voltage. LA3370 600 520 500 400 300 200 100 0 -20 LA3370 10µ 20kΩ 1kΩ 100 µ 3.3kΩ ...
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... SNC (stereo noise control) and HCC (high-cut control) The LA3370 has SNC and HCC terminals for improved S/N ratios when operating in weak radio fields. By adjusting the SNC terminal, noises unique to stereo FM in weak fields can be reduced. The HCC terminals permits further improvement of effective S/N ratios by lowering treble levels of FM noises in weak fields ...
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... Fig.2 shows typical meter outputs of a quadrature detection IF amplifier IC. (Fig. 1 shows data for LA1140) HCC characteristics have been designated to permit region B improvements when the IC is directly connected to HCC (pin 7) terminal of the LA3370. The infinitesimal control currents at pin 7, similar to pin 8, do not affect meter outputs. LA3370 C [µ ...
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... S/N improvements in region C of Fig.1 Because S/N ratios deteriorate even further in the region C of Fig better to improve the S/N in this region with IF mutings. The LA1140 is available to linearly vary the IF muting. Employment of the LA3370 together with the LA1140 further enhances S/N improvement. (6) Using the HCC terminal for muting Muting in the neighborhood of 37dB are feasible by utilizing HCC functions as muting functions when used in home stereos and no need exists to suppress treble noises ...
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... S/N improvement -- dB SNC, HCC Control Pin Current (Fig. 5) 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0 Voltage at Pins LA3370 SNC and HCC Operating Regions (Fig -10 6 -20 5 -30 4 - -20 JK337010 ...
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... Chart to Obtain Stereo S/N Characteristics from SNC Characteristics (Fig High-Cut Control Characteristics (Fig High-cut parameter - 0.01µF -20 -30 - 100 1k Frequency kHz LA3370 2.8 2.6 2.4 2.2 2.0 1.8 2 1.6 1.4 3 1.2 4 1.0 0.8 5 0.6 2 0 ...
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... Input Voltage Sep -- Vi (Fig. 12 200 400 600 Input Voltage LA3370 Free-Running Frequency Temperature -40 -20 Ambient Temperature °C JK337019 THD -- Vi (Fig. 11b 1 0 0.01 2 ...
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... Voltage Applied to Pin Sep Temperature Characteristic (Fig 20 - Ambient Temperature °C LA3370 Capture, Lock Range (Fig 15 100 Free-Running Frequency kHz JK337027 Output Voltage-Load Resistance Characteristic (Fig. 17 ...
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... SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of May, 2008. Specifications and information herein are subject to change without notice. LA3370 PS No.619-11/11 ...