PDF LA1828 Data sheet ( Hoja de datos )

Número de pieza	LA1828
Descripción	Single-Chip Tuner IC for Portable Radio /Cassette Recorders with Manual Tuning
Fabricantes	Sanyo Semicon Device
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No Preview Available ! Ordering number : EN5837 LA1828 Monolithic Linear IC LA1828 Single-Chip Tuner IC for Portable Radio /Cassette Recorders with Manual Tuning Functions • AM: RF amplifier, mixer, oscillator, IF amplifier, detector, AGC, tuning display output • FM-FE: RF amplifier, mixer, oscillator • FM-IF: IF amplifier, quadrature detector, signal strength meter, tuning display output • MPX: PLL stereo decoder, stereo display output, forced mono, internal VCO Features • Single-chip tuner with AM, FM-FE/FM-IF, MPX circuitry • Built-in adjustment-free MPX-VCO (noceramic oscillator required) • Reduced FM-FE oscillation level • FM stereo indication and AM/FM tuning indication outputs can directly drive LEDs Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Indicator drive current Allowable power dissipation Operating temperature Storage temperature Symbol VCCmax ILED Pd max Topr Tstg pins 8, 9 Ta ≤ 70°C Package Dimensions unit:mm 3067-DIP24S [LA[L1A8128288]] 24 13 1 12 21.2±0.25 0.81±0.25 1.78±0.25 +0.15 0.48-0.05 0.95±0.15 SANSAYNOY:OD:DIPIP2244SS Conditions Ratings 7.0 20 300 –20 to +70 –40 to +125 Unit V mA mW °C °C Operating Conditions at Ta = 25°C Parameter Recommended supply voltage Operating supply voltage range Symbol VCC VCCop Conditions Ratings 4.5 2.5 to 6.0 Unit V V SANYO Electric Co., Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 51198RM(KI) No. 5837-1/13 1 page Ordering number : EN5837 Continued from preceding page Pin number Function Quiescent voltage (V) AM FM 16 L output 17 R output 1.4 1.4 18 MPX input 1.3 1.3 FM detector 19 output and AM detector output 0.5 1.5 20 FM-OSC 4.5 4.4 21 VCC2 4.5 4.4 LA1828 Equivalent circuit Remarks ROUT = 7.5 kΩ ROUT 16 17 A10260 RIN = 50 kΩ 18 RIN A10261 ROUT(FM) 19 ROUT(AM) A10262 21 20 Output impedance AM: ROUT = 50 kΩ FM: ROUT = 500 Ω Capacitance between pin 19 and ground should be optimzed for the best separation characteristics. Colpitts oscillator circuit FM oscillator coil connected to pin 20. R 21 A10263 4 A10264 FM-FE block VCC Power is supplied from pin 4 (VCC1) via external resistor (10 Ω). 22 FM-RF output 24 FM-RF input 4.5 4.4 22 0 1.0 24 23 GND2 00 21 FM RF coil connected between pins 22 and 21 (VCC2). RIN = 1.8 kΩ A10265 FM-FE brock ground 51198RM(KI) No. 5837-5/13 5 Page Ordering number : EN5837 LA1828 FM characteristics 0 VCC =4.5V -10 fc= 98MHz fm =1kHz,22.5kHzdev -20 Signal -30 -40 -50 -60 -70 -80 Noise -90 -100 -20 0 20 40 60 80 100 120 ANT input - dBµ 80 FM Vcc characteristics fc= 98kHz VIN =60 dBµ 70 fm =1kHz,22.5kHzdev S/N 60 VO 50 140 0 -10 -20 -30 40 -40 30 SD 20 LS QS 10 0 12 30 VCC= 3V No input fm = 1kHz 345 Power supply voltage, Vcc - V FM Vcc characteristics 6 -50 -60 -70 -80 7 20 10 0 12 3 4 5 Power supply voltage, Vcc - V 10 VCC=4.5V 7 VIN=60dBµ 5 fc =98MHz L+R = 90% 3 PILOT =10% MPX characteristics 6 2 SUB 1.0 ST 7 MONO 5 MAIN 3 2 7 5 VCC =4.5V fc= 98MHz fm =1kHz 4 FM characteristics VSM 2.5 2.0 3 1.5 2 1.0 1 THD=75kHzdev 0.5 0 THD=25kHzdev 0 -20 0 20 40 60 80 100 120 140 ANT input - dBµ 5 fVcI=N9=86M0dHBzµ FM Vcc characteristics fm = 1kHz 4 3 2 1 THD=75kHzdev THD = 22.5kHz dev 00 1 2 3 4 5 Power supply voltage, Vcc - V FM characteristics 80 fc =4.5kHz VIN =60 dBµ 70 fm =1kHz,22.5kHzdev S/N 60 6 50 40 30 20 SD 10 LS QS 0 80 90 100 Reception frequency, fr - MHz 60 VCC=4.5V VIN =60dBµ 50 fc= 98MHz L+R = 90% PILOT = 10% MPX characteristics Sep - R 40 Sep - L 30 7 110 20 10 0.1 0.01 2 3 5 70.1 2 3 5 7 1.0 2 3 5 7 10 2 3 Modulation frequency, fm - kHz 0 0.01 2 3 5 7 0.1 2 3 5 7 1.0 2 3 5 7 10 2 3 Modulation frequency, fm - kHz 51198RM(KI) No. 5837-11/13 11 Page

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