Monolithic Linear LA1837 Home Stereo with Electronic Tuning

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Monolithic Linear LA1837 Home Stereo with Electronic Tuning

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Ordering number EN5688C
Monolithic Linear
LA1837
Home Stereo with Electronic Tuning Support
Single-Chip
LA1837 single-chip AM/FM that supports electronic tuning developed home stereo systems. optimal automatic station selection systems that counting techniques.
Features
On-chip external components required). Adjacent channel interference rejection function (third fifth order). Supports both counting techniques. sensitivities independently. output levels independently. Improved practical sensitivity high-input distortion characteristics.
Functions
FM-IF amplifier, mixer, oscillator, amplifier, detector AGC, oscillator buffer, S-meter, narrowband buffer amplifier, quadrature detector, S-meter, Scurve detector, buffer output stereo decoder, stereo display, forced mono, stop, post amplifier, audio muting, adjacent channel interference rejection function
Specifications
Maximum Ratings 25°C
Parameter Maximum supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol Topr Tstg 70°C Conditions Ratings +125 Unit
SANYO Semiconductor Co.,Ltd. products described contained herein are, with regard "standard application", intended general electronics equipment (home appliances, equipment, communication device, office equipment, industrial equipment etc.). products mentioned herein shall intended "special application" (medical equipment whose purpose sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level reliability directly threaten human lives case failure malfunction product cause harm human bodies, shall they grant guarantee thereof. should intend products applications outside standard applications customer considering such and/or outside scope intended standard applications, please consult with prior intended use. there consultation inquiry before intended use, customer shall solely responsible use. Specifications SANYO Semiconductor Co.,Ltd. products described contained herein stipulate performance, characteristics, functions described products independent state, guarantees performance, characteristics, functions described products mounted customer' products equipment. verify symptoms states that cannot evaluated independent device, customer should always evaluate test devices mounted customer' products equipment.
70109 62409 PC/82097HA(OT) No.5688-1/9
LA1837
Operating Conditions 25°C
Parameter Recommended supply voltage Operating supply voltage range Symbol Conditions Ratings Unit
Electrical Characteristics 25°C, specified test circuit
Parameter Symbol Conditions Mono characteristics 10.7MHz, 1kHz, with coil adjusted that VAFC VREG Current drain Demodulation output Channel balance Total harmonic distortion (mono) ICCO-FM VOFM C.B-mono THDFM(1) THDFM(2) Signal-to-noise ratio rejection ratio Limiting input voltage sensitivity bandwidth count buffer output S-meter output S/NFM -3dBL.S. SDOn-FM SDBW VIFBuff-FM VSM-FM(1) VSM-FM(2) Muting attenuation Mute-Att 100dB 100dB, output 0dB, output 100dB, output 100dB, 100% mod. output With input 100dB, 100% mod. output 100dB, 100% mod. output/pin output 100dB, 100% mod. output 100dB, 100% mod. output 100dB, 100% mod. output 100dB, 100% mod. output 100dB, 100% mod. Referenced output. input such that output down -1.5 1100 1460 +1.5 mVrms mVrms Ratings Unit
stereo characteristics 10.7MHz, 100dB, 1kHz, 90%, pilot Separation (left) Separation (right) Stereo level Stereo level Total harmonic distortion (main) Adjacent channel interference rejection ratio Brej-5th SepL SepR STON STOFF THD-main Brej-3rd mod. output/pin output mod. output/pin output pilot modulation such that under 0.7V. pilot modulation such that over 4.5V. mod. output 113kHz, 90%, Pilot 10%, output mod. 1kHz demodulated output 189kHz, 90%, Pilot 10%, output mod. 1kHz demodulated output characteristics 1000kHz, 1kHz Current drain Detector output ICCO-AM VOAM(1) VOAM(2) Signal-to-noise ratio S/NAM(1) S/NAM(2) Total harmonic distortion (mono) THDAM(1) THDAM(2) sensitivity Local oscillator buffer output counter buffer output ST-IF output S-merer output SDOn-AM VOSC-AM VIFBuff-AM VSTIF-AM VSM-AM With input. output 80dB, modulation. output 80dB, modulation. output 0dB, modulation. With input 23dB, mod. output 80dB, mod. output 23dB, mod. output 80dB, mod. output 80dB, mod. output 80dB, mod. output mVrms mVrms mVrms mVrms mVrms
No.5688-2/9
LA1837
Package Dimensions
unit (typ) 3196A
Allowable power dissipation,
27.0
10.16
0.25
0.95
3.95
(3.25)
0.51
0.48 1.78
Ambient temperature,
(1.04)
SANYO DIP30SD(400mil)
Block Diagram
BAND-W L.P.F
BUFF
AM-STEREO L/R-INPUT L-OUT R-OUT L.P.F
BUFF
RF.AMP
DECODER ANTI-BIRDIE P-DET
STEREO
MUTE
COMP S-METER 304kHz PILOT
S-METER S-CURVE IF-BUFF (10.7MHz) TU-LED ST-LED TUNING DRIVE STEREO DRIVE
AM-IF NARROW AM/FM IF-BUFF MUTE MONO view
(SD-ADJ)
No.5688-3/9
LA1837
Test Circuit
AM-IN (1MHz)
39pF 20pF
0.047F
0.047F 39mH
L.P.F
910pF
3.3k
0.033F
1000pF
0.047F
0.033F
5.1k
3.3F
3.3k
BUFF (1.45MHz)
0.01F
L.P.F
L-OUT R-OUT
LA1837
IF-BUFF
4.7k
NORMAL
0.047F
0.047F
MONO
AM-ST
100F
view
Functions
function input voltage Vreg description Input impedance Equivalent circuit
mixer output Connect mixer coil between this VCC.
input bypass input
Vreg Vreg
Also functions regulator filter. Input impedance
TU-LED ST-LED AM-IF output
Active Open collector output stereo output (pin current input must exceed 150A.
detector
Recommended detector coil 600BEAS-9715Z (The Toko Electric Corporation)
narrow band connection 1.3V Recommended narrow band BFU450 (Murata Mfg. Co., Ltd.) narrow band used, bypass this circuit with resistor 0.047F capacitor connected series. Continued next page.
No.5688-4/9
0.047F
0.47F
SEEK1000pF
0.047F
1000pF
(10.7MHz) 0.047F
450kHz
STEREO
9.0V
LA1837
Continued from preceding page. function FM-S-meter output voltage description Equivalent circuit
S-meter output sensitivity adjustment
(AM)
sensitivity adjusted with value external resistor connected between this ground.
buffer output, output control switch (mute switch)
Reception state buffer output turned buffer output muting turned
Phase comparator low-pass filter (FM/AM switching)
VCC-1.4 (FM) (AM)
Connecting this ground through resistor sets mode. Resistor value limits 2.7k (when 3.9k (8V) 5.1k (9V) 6.2k (10V) 7.5k (11V)
Pilot detector low-pass filter (forced mono) (VCO stop)
VCC-1.0
current greater flows from this pin, system forced mono. Connecting this ground stops VCO. resistor limit values same
Post amplifier input output
Vreg Vreg
Output impedance right output, left output Inverting inputs right input, left input
output
3.5V 3.5V
Output impedance 3.3k right de-emphasis left de-emphasis
input
2.9V
Input impedance
demodulator output
2.8V (FM) 2.8V (AM)
Output impedance 3.0k separation modified inserting capacitor between this ground. sub/VO main about
detector output
(FM) 0.5V (AM)
Output impedance 3.3k frequency characteristics modified adjusting time constants circuits between this between this ground.
(FM) 0.5V (AM)
built-in load resistor 11k.
Continued next page.
No.5688-5/9
LA1837
Continued from preceding page. function voltage Vreg description bandwidth modified with external resistor connected between this Equivalent circuit
input
Vreg
this same potential
Vreg Vreg 3.6V
Vreg
oscillator coil between this
Oscillator buffer output, sensitivity adjustment
1.6V (FM) 1.3V (AM)
sensitivity modified with external resistor connected between this ground. Output impedance
Coil specifications (bottom view)
oscillator (for DUT) HW-50425 (Mitsumi Electric Co., Ltd.) YD-1073-1 (Mitsumi Electric Co., Ltd.)
270H
YD-1073
450kHz
SFU450B
Includes internal 180pF capacitor. SFU450B included.
detector 600BEAS-9715Z (The Toko Electric Corporation)
10.7MHz Includes internal 82pF capacitor.
No.5688-6/9
LA1837
Overall Characteristics
Total harmonic distortion, S-meter output,
THD/VSM Characteristics
10.7MHz 1kHz, 75kHzdev
Output
10.7MHz 1kHz, 75kHzdev
Noise
Input
Input
0.01 0.01
Band Characteristics
Total harmonic distortion,
Distortion Frequency Characteristics
Total harmonic distortion,
100dB 1kHz, 75kHzdev
MAIN
Frequency, freq 10.7MHz, 100dB, 75kHzdev PILOT Referenced LA1836 demodulated output. LA1837
10.60 10.62 10.64 10.66 10.68 10.70 10.72 10.74 10.76 10.78 10.80
Frequency
Separation Frequency Characteristics
Sep-L
Adjacent Channel Interference Rejection Ratio
Separation,
0.01
Vobat
Frequency, freq
Frequency,
Capture Range Characteristics
Sensitivity Adjustment Characteristics
Capture range
Pilot
Rsdadj
No.5688-7/9
LA1837
Sensitivity Adjustment Characteristics
Overall Characteristics
Output
1MHz 1kHz, 30%mod (80dB) 58dB
Noise
Radj
Input
Characteristics
1MHz =1kHz, 30%mod (80dB) 58dB
Detector Output Frequency Characteristics
Total harmonic distortion, S-meter output,
Output voltage,
80%mod 30%mod
0.01
0.02
Input
Frequency,
Detector Output Frequency Characteristics
Distortion Ambient Temperature Characteristics
0.01F
Total harmonic distortion,
Output voltage,
0.01
Mono
Main
Frequency,
Ambient temperature,
Separation Ambient Temperature Characteristics
Mono Stereo
Separation,
Sep-R
Sep-L
Ambient temperature,
No.5688-8/9
LA1837
SANYO Semiconductor Co.,Ltd. assumes responsibility equipment failures that result from using products values that exceed, even momentarily, rated values (such maximum ratings, operating condition ranges, other parameters) listed products specifications SANYO Semiconductor Co.,Ltd. products described contained herein. SANYO Semiconductor Co.,Ltd. strives supply high-quality high-reliability products, however, semiconductor products fail malfunction with some probability. possible that these probabilistic failures malfunction could give rise accidents events that could endanger human lives, trouble that could give rise smoke fire, accidents that could cause damage other property. When designing equipment, adopt safety measures that these kinds accidents events cannot occur. Such measures include limited protective circuits error prevention circuits safe design, redundant design, structural design. event that SANYO Semiconductor Co.,Ltd. products described contained herein controlled under applicable local export control laws regulations, such products require export license from authorities concerned accordance with above law. part this publication reproduced transmitted form means, electronic mechanical, including photocopying recording, information storage retrieval system, otherwise, without prior written consent SANYO Semiconductor Co.,Ltd. information described contained herein subject change without notice product/technology improvement, etc. When designing equipment, refer "Delivery Specification" SANYO Semiconductor Co.,Ltd. product that intend use. Information (including circuit diagrams circuit parameters) herein example only; guaranteed volume production. Upon using technical information products described herein, neither warranty license shall granted with regard intellectual property rights other rights SANYO Semiconductor Co.,Ltd. third party. SANYO Semiconductor Co.,Ltd. shall liable claim suits with regard third party's intellctual property rights which resulted from technical information products mentioned above.
This catalog provides information July, 2009. Specifications information herein subject change without notice. No.5688-9/9

Monolithic Linear LA1837 Home Stereo with Electronic Tuning

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