LA1137 Sanyo Semiconductor Corporation, LA1137 Datasheet
LA1137
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LA1137 Summary of contents
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... Ordering number: EN 3507 Overview The LA1136N/NM and LA1137N/NM are high-performance AM electronic tuner ICs offering sophisticated functions. They are 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 ...
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... Pd max – Ta Ambient temperature, Ta – °C LA1136N, 1136NM, 1137N, 1137NM unit : mm 3112-MFP24S SANYO : DIP24S unit : mm 3036B-MFP20 SANYO : DIP20Slim Mounted on 20 Independent IC [LA1136NM] SANYO : MFP24S [LA1137NM] SANYO : MFP20 Pd max – 1.5 mm PCB Ambient temperature, Ta – °C No. 3507-2/28 ...
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... Pin 6+13+19 (LA1136N) 14 Pin 20 (LA1137N), Pin 24 (LA1136N 65°C (LA1136N 77°C (LA1137N) Independent IC 47°C (LA1136NM) With PCB 80°C (LA1136NM) Independent IC 63°C (LA1137NM) With PCB 77°C (LA1137NM) Conditions op Pd max – 1.5 mm PCB Ambient temperature, Ta – °C Ratings 12 13.4 15 ...
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... IF count buffer output leakage V voltage Antenna input level for RF AGC ON and tweet prevention Antenna input for wideband AGC ON Wideband/narrowband detector output ratio (weak input) Pin-diode driver current I Note) SW voltage GND OPEN LA1137N, LA1137NM Operating Characteristics 25°C, V Parameter Symbol Current drain Detection output V ...
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LA1136N, LA1136NM Test Circuit LA1136N, 1136NM, 1137N, 1137NM No. 3507-5/28 ...
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... LA1137N, LA1137NM Test Circuit LA1136N, 1136NM, 1137N, 1137NM No. 3507-6/28 ...
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LA1136N Equivalent Circuit LA1136N, 1136NM, 1137N, 1137NM No. 3507-7/28 ...
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... LA1137N Equivalent Circuit LA1136N, 1136NM, 1137N, 1137NM No. 3507-8/28 ...
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LA1136N Sample Application Circuit LA1136N, 1136NM, 1137N, 1137NM LA1136N No. 3507-9/28 ...
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... LA1137N Sample Application Circuit LA1136N, 1136NM, 1137N, 1137NM No. 3507-10/28 ...
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... HIGH (3 higher) off LOW (1 lower) Note necessary to modify the microcontroller specifications in order to implement tweet prevention. When a conventional microcontroller is used with the LA1136N or the LA1137N, the tweet prevention circuit does not operate, but all other functions operate independently. Device Comparison Comparison between LA1135, LA1136N and LA1137N ...
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... LA1136N, LA1137N Usage Notes 1. Do not connect the antenna alignment circuit and local oscillation circuit. 2. The coils should be specified to obtain an output level of –25 dBm (43.6 mVrms) for the given input levels shown below, and under the conditions fm = 400 Hz, 30% modulation and f Antenna input 20.0 dBµ ...
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... Required local oscillator signal Countermeasure 1 Reduce the oscillator coil stray capacitance (tapping is recommended) 2 Connect a capacitor greater between OSC BUFF (Pin 24 for LA1136N, and Pin 20 for LA1137N) and GND. (3) IF tank coil LA1136N Pin 13 load coil LA1137N Pin 10 load coil The IF tank coil connected to IF OUT has different specifications to that of the LA1135. The detector input impedance of the ...
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Oscillator coil For use with SVC321, triple varactor diode For use with quad varactor diode (3) Mixer coil Center frequency (4) IF tank coil Center frequency LA1136N, 1136NM, 1137N, 1137NM No. 3507-14/28 ...
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... Because the LA1136N and the LA1137N offer many sophisticated functions, a number of their pins are dual-purpose pins. An example is pin 3 (on both the LA1136N and the LA1137N), which serves both as the wideband AGC input pin and the antenna dumping pin diode drive pin result, particular attention must be given to the wiring pattern layout, since feedthrough of other signals as shown in the figure below can cause AGC to operate without input, resulting in reduced sensitivity ...
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... The local oscillation level increased during LW (approx. 50°C or greater should be added between pins 19 and 23 for LA1136N, and between pins 15 and 19 for LA1137N. Not necessary for MW. 8. Image Interference Reduction Image interference in the alignment circuit can be reduced 1.4 MHz by injecting a 2.3 MHz trap signal into the primary coil ...
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... Application Circuit using the IF count method The LA1136N and LA1137N can be configured for tuning using either the stop detector or the IF count method. The application circuits are examples of tuners using the IF count method. The stop detector can be used in any of the application circuits by making the circuit modifications shown below ...
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... Stop Detector Adjustment Although this explanation is for the LA1137N identical for the LA1136N, except that the pin numbers are different. The LA1137N is designed for use with the following microcontrollers. Stop detection method: LM7001 (Sanyo) (SD output only) IF count method: LM7000 (Sanyo) LC7230 (Sanyo) (1) Support for the LM7001 The search stop detector uses the active HIGH signal of pin18 ...
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... Tweet Prevention Circuit (1) Cause and countermeasures for Tweet distortion The beat noise frequency characteristics for LA1137N 900 kHz and the corresponding circuit where it is generated are shown below. The minimum signal-to-noise ratio for tuners using a reference input signal is 30 dB. Tweet input ...
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... The varactor diodes can be replaced by an up-converter. However, this increases the susceptibility to interference. (3) Countermeasures for LA1136N, LA1137N Although this explanation is for the LA1137N identical for the LA1136N, except that the pin numbers are different. Maximum beat noise with tweet prevention Inactive ...
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... IF AGC capacitor when a seek is initiated while the device is receiving a strong signal (2) Countermeasures Although this explanation is for the LA1137N identical for the LA1136N, except that the pin numbers are different. Countermeasure for problem 1: When a high signal on pin 11 is detected during a seek operation, change the time constants as indicated below. ...
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... LM7001, etc.). Countermeasure for problem 3: For LA1137N, a transistor and base current supply circuit (200 µA maximum) have been incorporated into a cascade AGC configuration to simplify the use of high I Note that V = 6.1 V for no input signal. Also, V AGC– ...
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... Gain Adjustment Method (1) AGC Operations The AGC circuits for LA1136N and LA1137N are configured based on the AGC circuit for LA1135. Although this explanation is for the LA1137N identical for the LA1136N, except that the pin numbers are different stage IF IF amplifier Detector ...
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... IF Count Buffer Although this explanation is for the LA1137N identical for the LA1136N, except that the pin numbers are different. Circuit operations Pin 13 serves as both the count buffer input pin and output pin. When the control voltage with no load is HIGH 5 V, the IF buffer output is 300 mVrms and when LOW GND, 1 mVrms or lower. Supports Sanyo’ ...
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LA1136N, 1136NM, 1137N, 1137NM For SD sensitivity Fidelity Characteristics Modulation frequency, fm [Hz] Detection Output, THD – V Characteristics S Detection output Modulation depth, V [%] S Selectivity Characteristics Difference frequency, f [kHz] When ...
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LA1136N, 1136NM, 1137N, 1137NM Band Characteristics (Tracking adjustment at each point) IF interference ratio Image interference ratio Effective sensitivity (ANT input when S dB) Maximum Sensitivity (ANT input when output –25 dBµ) (using varactor diode) Receive, fr [kHz] ...
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LA1136N, 1136NM, 1137N, 1137NM Temperature Characteristics IF buffer output (74 dBµ Input, zero modulation) Oscillator buffer (Quiescent) IF count buffer output (30 dBµ Input, zero modulation) Stop detector count buffer leakage (74 dBµ ...
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Cross-modulation Characteristics Target input Interference input Target input Interference input Interference input [dBµ] No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, ...