LA1135 Sanyo Semiconductor Corporation, LA1135 Datasheet
LA1135
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LA1135 Summary of contents
Page 1
... Ordering number: EN1272E Overview The LA1135 is a high-performance AM electronic tuner IC that is greatly improved in cross modulation characteristics especially suited for use in car radio and home stereo (antenna: loop) applications. Functions . . MIX OSC (with ALC amplifier . . Detector AGC (normal wide-band AGC . Auto search stop signal (signal meter output) ...
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... Signal meter output V Input at signal meter output 1 V Local oscillation buffer output V OSC LA1135, 1135M Conditions max Pins 8, 14 Pins Pin 6 IN Pins Pin 18 Pin 20 LA1135 LA1135M Ta % 60°C, with PCB LA1135 LA1135M Conditions MHz Circuit. Conditions I 1 Quiescent 130 dBµ input ...
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... Selectivity IF interference IF. R. Image frequency IM. R. interference Note: *: Wide-band AGC OFF ( ): See circuit on page 7. with 54 Equivalent Circuit Block Diagram LA1135, 1135M Conditions Input at S (2SK315 mA) DDS Reception 1.0 MHz quiescent Interference 1.4 MHz non-mod at input for AMT.D. ON Input 74 dBµ 130 dBµ ...
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... Test Circuit MHz 400 Unit (resistance: , capacitance valve voltmeter Varactor diode Narrow-band filter BFU450CN (Murata) Sample Printed Circuit Pattern LA1135, 1135M DC voltmeter Coil T1 T2 SVC321 (Sanyo Cu-foiled area 105 Distortion meter Valve voltmeter V O YT-30020 (Mitsumi) YT-30018 (Mitsumi) CFMA-027 (Toko) YT-30007 ...
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... Test Circuit MHz 400 Probe load open Unit (resistance: , capacitance: F) LA1135, 1135M DC voltmeter Coil T1 YT-30202 T2 YT-30018 T3 CFMA-021A T4 YT-30007 T5 YT-30008 Varactor diode Narrow-band filter BFU450CN (Murata) Detection output Distortion meter (Mitsumi) (Mitsumi) (Toko) (Mitsumi) (Mitsumi) SVC321 (Sanyo) No. 1272-5/18 ...
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... Double tuning Measures Replace R1 with (2000 pF to 3000 pF or thereabouts) D Relocate L2. Damping (600 kHz to 1400 kHz) Old circuit –15 dB LA1135, 1135M ) so that no leakage of the IF signal to the GND line CC considered. SM MIX stage Det stage Unit (resistance: New circuit Double tuning New circuit – 400 Hz 30% mod becomes – ...
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... When using MW, no additional resistor is required. 12. Improvement in image frequency interference Change the RF double-tuning coil as follows, and the image frequency interference becomes the tuning circuit must not be decreased with resistor 100 k .) LA1135, 1135M S meter output Wide-band AGC circuit ...
Page 8
... In the application circuit configuration shown below, the bypass capacitor in the position where the tuning voltage is applied and coupling L for double-tuning may cause an antiresonance point of 400 kHz to 600 kHz depending on the variations in the coil, varactor diode, etc. The value of the bypass must be 0.047 µF or greater. The recommended value is 0.1 µF. LA1135, 1135M Wide-band AGC OFF Usable sensitivity S Maximum sensitivity at – ...
Page 9
... PIN diodes are used in the antenna damping circuit) The LA1135 contains the wide-band AGC circuit (wide-band AGC with pin 2 input) against cross modulation which occurs because an undesired signal of high strength distorts the FET input. The AGC = ON level depends on the value of external resistor R3 as shown below ...
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... Undesired: 1.4 MHz non-mod Desired: 1.0 MHz non-mod kHz 80% mod Undesired: 1.4 MHz f Pin 2 input W.B.AGC External pickup 17. For details of the LA1135 wide-band AGC, refer to Technical Data No.79. External Parts (1) RF double-tuning coil Primary YT-30020 (Mitsumi) 2157-2239-518A (Sumida) 7BRS-8934A (Toko) 1–2 6– ...
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... Input voltage – dBµ Tweet Input Characteristics Signal characteristic f = 900 kHz f = 400 Hz 30% mod r m Complete tuning (Zero beat) ANT input – dBµ LA1135, 1135M YT-30007 (Mitsumi) 4140-1289-164 (Sumida) 115T 6T 37T Center frequency 455 kHz, Center frequency 455 kHz Qu = 110 110% Tuning capacitance 180 pF ...
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... Difference in input at –25 dBm output Frequency deviation, f – kHz Detuning Characteristics Using narrow-band filter Frequency deviation, f – kHz LA1135, 1135M Spurious Characteristics Difference in input at –25 dBm output Receiving frequency, f Detection Output, THD – Modulation Characteristics Input: 74 dBµ Detection output Distortion Modulation – ...
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... LA1135, 1135M V , THD – Detection output-Input: 74 dBµ Detection output Supply voltage, V – – Quiescent Quiescent Quiescent Supply voltage, V – – V OSC CC OSC coil 1/2 tap Supply voltage, V – – Input: 130 dBµ Using narrow-band filter Supply voltage, V – – OSC coil 1/2 tap Supply voltage, V – ...
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... Temperature Characteristics Ambient temperature, Ta – °C Cross Modulation Characteristics Testing Method Desired signal ANT input Desired signal ANT input Solid line —— Interference Dotted line ---- No interference LA1135, 1135M Usable sensitivity (Input S/ input 2-signal pad JIS Dummy ANT Unit (resistance: , capacitance Desired signal 80 dBµ ...
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... Hz 30% mod Undesired 1.4 MHz non mod Desired input 80 dBµ Desired 1.0 MHz Undesired Undesired input – dBµ LA1135, 1135M Cross Modulation Characteristics Desired 1.4 MHz 400 Hz 30% mod Undesired 1.44 MHz non mod Desired input 40 dBµ non mod 1 ...
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... Specification for LA1135 loop ANT (1) Features of specification for LA1135 loop ANT 1) Excellent high-input characteristic The antena damping circuit prevents the antena circuit from being magnetic-saturated, which results in worsened characteristic high input. 2) Excellent cross modulation characteristic (2) Application circuit DC voltmeter HF valve voltmeter (3) Circuit configuration and connection ...
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... Loop ANT 42579719100 (LA-1500), 4257976000 (LA-100A) (Korin) IC Overall Characteristics Detection output at 30% mod Input voltage – dBµ Detection Output, THD – Modulation Degree Input 74 dBµ Detection output V O Modulation degree – % LA1135, 1135M Pin No. Pin Name Local OSC 9 RF output ...
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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 September, 1997. Specifications and information herein are subject to change without notice. LA1135, 1135M – V Selectivity Characteristics Frequency deviation – ...