la1862m Sanyo Semiconductor Corporation, la1862m Datasheet
la1862m
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la1862m Summary of contents
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... Ordering number: EN 4092B Overview The LA1862M is a single-chip car stereo FM IF/NC/MPX tuner IC which offers improved IF stability and S-meter characteristics, compared with the LA1861M. The LA1862M makes the design of high-performance FM tuners at low cost easy. Functions . IF amplifier . Peak detector . AF preamplifier . AFC output . S-meter driver ...
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... Att High-out control attenuation Att Ripple rejection Channel balance Pilot signal attenuation Stereo indicator LED current Pin 25 saturation voltage Note: When a filter is not specified, connect an IHF bandpass filter to the MPX outputs. LA1862M Symbol Conditions 8 10.7 MHz, unless otherwise noted SW off ...
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... Test Circuit LA1862M 3 Specified board ( glass epoxy resin) Independent IC Ambient temperature, Ta – °C Unit (resistance: , capacitance: F) No. 4092- 3/27 ...
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... Stereo indicator LED driver output 26 Noise canceller input 27 Ground 28 Audio muting amplifier output (AF output) 29 AFC output 30 Peak detector input 31 IF signal output 32 Muting attenuation control 33 Voltage reference output 34 Pilot signal canceller detector 35 IF input 36 IF bypass input LA1862M Description ) CC No. 4092- 4/27 ...
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... Sample Application Circuit PCB Pattern LA1862M Unit (resistance: Unit (resistance: Frequency divider , capacitance capacitance: F) No. 4092- 5/27 ...
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Note 1: Used to change the SD sensitivity Note 2: When LOC goes HIGH, the IF count and SD sensitivity shift Frequency divider See note 1. Unit (resistance: , capacitance: F) ...
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... Pin Functions Pin No. Function 1 S-meter output 2 IF buffer ON adjust 3 IF buffer output 4 Mute adjust LA1862M Equivalent circuit FM S-meter detector IF amplifier Inversion circuit Remarks Current-drive waveform S-meter circuit Control signal: SEEK when HIGH ( STOP when LOW (GND) Pin 3 should be left open if not using the IF count Continued on next page ...
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... Continued from preceding page. Pin No. Function 5 Mute drive 6 Noise sensitivity adjust 7 Noise AGC 9 Gate time adjust 10 Memory circuit 11 LPF output 17 Pilot cancel signal input LA1862M Equivalent circuit S-meter detector Gate Pulse circuit detector To MPX input Gate Subtraction circuit Remarks Mute circuit Mute band ...
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... Continued from preceding page. Pin No. Function 12 High-cut capacitive coupling 13 HCC control input 14 SNC control input 15 MPX outputs 16 LA1862M Equivalent circuit Composite signal Multiplier Remarks High-cut frequency set pin Output R = 3.3 k Load R built-in Continued on next page. No. 4092- 9/27 ...
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... Continued from preceding page. Pin No. Function 18 Pilot cancel signal output 34 Pilot cancel signal detector 19 Pilot detectors 20 21 VCO 22 Phase detectors 23 LA1862M Equivalent circuit Composite signal Composite signal Remarks Continued on next page. No. 4092- 10/27 ...
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... Continued from preceding page. Pin No. Function 24 PLL input 25 ST indicator 26 Noise canceller input 28 Muting circuit output 32 Muting attenuation adjust LA1862M Equivalent circuit Inversion circuit Schmitt trigger Remarks ST indicator Mono when HIGH and stereo when LOW pin 28: Output impedance 50 Continued on next page. ...
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... Continued from preceding page. Pin No. Function 29 AFC output 30 Peak detector input 31 Constant voltage output 33 Constant voltage circuit 35 IF input 36 IF bypass LA1862M Equivalent circuit Remarks No. 4092- 12/27 ...
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... Keep in mind that changing the detector coil or tuning capacity Q changes the slope of the S-curve and hence the bandwidth. 3. The attenuation muting depends on the resistance connected to pin 32. 4. The muting transient response depends on the resistance between pins 29 and 33, the capacitance at pin 29, and the time constant for the RC circuit at pin 5. LA1862M Unit (resistance: Charging current Discharging current ...
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... Raising the seek speed requires decreasing the time constants. Decreasing them too far, however, reduces muting transient response and risks introducing beat noise and other distortion. LA1862M Muting drive output IF count buffer amplifier IF count buffer output resistor. ...
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... Pin 26 is the noise canceller input. An appropriate input level is 250 mVrms for 100% dev and kHz. Excessive input can exceed the noise canceller dynamic range, increasing the THD. Insufficient input, on the other hand, lowers the signal-to-noise ratio and reduces pilot lamp sensitivity. LA1862M Apply 5 V for seek SD output ...
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... For European markets C = 100 pF internal (Mitsumi) For European markets C = 100 pF External Note: The dotted lines in the characteristics diagrams on the following pages represent device operation outside the device specifications. LA1862M For North American and Japanese markets Internal External frequency divider or GND ...
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... Antenna input – dBµ (SG75 SD mute bandwidth 39 k resistor between pins 29 and 32 Pin V output Pin V 5 Frequency deviation, f – kHz V (pin 5) – IF input Mute IF input – dBµ LA1862M Input/output characteristics Pin V output 5 open) Detoning frequency, f – kHz V output 5 Pin 1 = 7.5 k Pin Pin 32 = 100 k Noise IF input – ...
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... Antenna input – dBµ Input/output characteristics Audio filter Antenna input – dBµ Input/output characteristics Mute OFF V – GND 5 Audio filter Antenna input – dBµ LA1862M V mute drive – Antenna input 5 Antenna input – dBµ V – Antenna input SM Antenna input – dBµ Input/output characteristics Mute OFF V – ...
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... MPX filter IN dev 10% (fixed) dev – kHz AF OUT (MPX OUT) – fm Emphasis OFF Modulation frequency, fm – kHz LA1862M AF-OUT, THD – dev dev – kHz Mute bandwidth – Pin resistance Pin resistance – Sep – f Frequency deviation – kHz dev (incl. pilot) THD – ...
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... Input voltage, V – mVrms IN Sep – f Pin 26 input Frequency, f – – V SUB SNC Pin 26 input LA1862M HPF frequency characteristics (Oscillator SG Matsushita Vp-817B10) Pin 26 input Pin 6 output Frequency, f – kHz THD – f Frequency, f – Hz Capture range Pin 26 input Input frequency, f – kHz Sep – ...
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... MPX output Channel separation, Sep – dB Noise sensitivity – µs pulsewidth Pin 6 R – S LA1862M Att – V Pin 26 input V High-cut (100 %) MPX output frequency characteristics MPX output frequency, f – kHz Gate time – Pin 9 R Pin 9 R Modulator output – V ...
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... LA1862M –3dBL.S. – Supply voltage, V – – =8 Supply voltage, V – Muting bandwidth – Supply voltage, V – – input Supply voltage, V – S/N – Supply voltage, V – Muting attenuation – Supply voltage, V – ...
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... V CC THD – Pin 26 input Supply voltage, V – – Pin 26 input Supply voltage, V – LA1862M CH Sep – V Supply voltage Pin 26 input Supply voltage, V S/N – V (IMF-BPF connected at MPX output) Supply voltage – Supply voltage – ...
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... Supply voltage, V – Noise – Ta Ambient temperature, Ta – ° – Input Ambient temperature, Ta – ° C LA1862M S/N – V Supply voltage OUT – Ta Ambient temperature, Ta – ° C S/N, –3dBL.S. – Ta S/N ratio Ambient temperature, Ta – ° C AMR – Ta Ambient temperature, Ta – ° – ...
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... IF input – dBµ THD – Ta Pin 26 input Ambient temperature, Ta – ° C Sep – Ta Pin 26 input Ambient temperature, Ta – ° C LA1862M AF, NOISE OUT – IF INPUT = Pin 26 input Ambient temperature, Ta – ° C Ambient temperature, Ta – ° C Ambient temperature, Ta – ° input – dBµ ...
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... CC OFF mode V is adjusted so that Sep dBµ input. Antenna input level – dBµ LA1862M S/N – Ta Ambient temperature, Ta – ° output – Antenna input Antenna input – dBµ HCC, SNC characteristics Antenna input level – dBµ Pin 26 input ...
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... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of June, 1998. Specifications and information herein are subject to change without notice. LA1862M PS No. 4092- 27/27 ...