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Ordering number : EN1506D
Monolithic Linear IC
LA1260
FM/AM Tuner System for Radio-Casette Recorders, Music Centers
Functions
Package Dimensions
FM : IF amplifier, quadrature detector, AF preamplifier, unit : mm tuning indicator drive output. 3006B-DIP16 AM : RF amplifier, MIX, OSC (with ALC), IF amplifier, Detector, AGC, tuning indicator drive.
[LA1260]
Features
* Minimum number of external parts required (No AM detection coil required). * High S/N : FM 81dB AM 53dB * Low-level AM oscillator with ALC : Pin 16 OSC output MW 130mV SW 70 mV to 90 mV (7MHz) (24MHz) * Less AM whistle interference : Whistle 1% at input 100dB/m. * On-chip LED tuning indicator driver. * On-chip FM/AM selector. * Independent FM/AM output pins : Possible to set FM/AM frequency characteristic independently.
SANYO : DIP16
Specifications Maximum Ratings at Ta=25C, See specified Test Circuit.
Parameter Maximum supply voltage Maximum current drain Flow-in current Flow-out current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max ICC max I7 I15 Pd max Topr Tstg Pins 6, 12 Pins 6+7+12 Pin 7 Pin 15 Ta70C Conditions Ratings 9 50 20 0.1 450 -20 to +70 -40 to +125 Unit V mA mA mA mW C C
Operating Conditions at Ta=25C
Parameter Operating voltage range Symbol VCC op Conditions Ratings 4.5 3.0 to 8.0 Unit V V Recommended operating voltage VCC
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TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN N2897HA (KT)/33194HO/O067KI/8225MW/4045KI/8084KI, TS No.1506-1/14
LA1260 Operating Characteristics at Ta=25C, VCC=4.5V, See specified Test Circuit
Parameter [AM Characteristics : f=1MHz] Quiescent current Detection output S/N ratio Detection output S/N ratio Total harmonic distortion LED lighting voltage Oscillation output (24MHz) [FM Characteristics : f=10.7MHz] Quiescent current -3dB sensitivity Demodulation output S/N ratio Total harmonic distortion LED lighting voltage AM rejection ratio IccoFM VINlim VO3 S/N3 S/N4 THD3 THD4 VLEDFM AMR VIN=No input -3dB down, 400Hz-100% mod. VIN=80dB, 400Hz-100% mod. VIN=80dB, 400Hz-100% mod. VIN=80dB, 400Hz-30% mod. VIN=80dB, 400Hz-100% mod. VIN=80dB, 400Hz-30% mod. IL=1mA VIN=80dB, 400Hz-100% FM mod. 1kHz-30% AM mod. -12.5 183 77 8.5 35 -9.5 260 81 71 0.55 0.05 39 60 49 1.2 12.0 42 -6.5 367 mA dB dBm mV dB dB % % dB dB Icco AM VO1 S/N1 VO2 S/N2 THD1 THD2 VLEDAM VOSC24M VIN=No input VIN=23dB, 400Hz-30% mod. VIN=23dB, 400Hz-30% mod. VIN=60dB, 400Hz-30% mod. VIN=60dB, 400Hz-30% mod. VIN=60dB, 400Hz-30% mod. VIN=100dB, 400Hz-30% mod. IC=1mA 22 60 -33 17.3 18.0 -19.0 87 48 7.5 -28 31 21.5 -16.0 122 53 0.45 1.5 30 86 1.3 3.0 38 120 -13.0 174 10.5 -23 55 mA dBm mV dB dBm mV dB % % dBm mV Symbol Conditions Ratings min typ max Unit
Equivalent Circuit Block Diagram
No.1506-2/14
LA1260 Test Circuit
Unit (resistance : , capacitance : F)
T1 Mitsumi YT30194 (56pF tuning) T2 Mitsumi KW30011 T3 Mitsumi YT30105 T4 Mitsumi YT30112
Proper Cares in Using the IC
External parts placement and pattern * The AM local oscillation parts, AM local oscillation coil, and antenna circuit parts such as bar antenna must be separated from each other as far as possible to prevent Qs from worsening. * Pin 16 (AM oscillation injection pin) and pin 14 (RF input pin) must be separated from each other on the pattern as shown in Figure. A below. Care should be taken not to make unwanted coupling by parallel wiring as shown in Figure B to prevent Qs from worsening.
Figure A Good example
Figure B Bad example
FM quadrature detection coil * The values recommended for the detection coil are shown below. (See Figure 1.) Tuning capacitance : 56pF Damping resistance : 6.8k * Values other than recommended provide the LED drive characteristic as shown below. Value increased Tuning capacitance * Lighting is delayed. * No lighting may occur at low temperature. * Lighting is advanced. * Mislighting may occur in the absence of signal. Value decreased * Lighting is advanced. * Mislighting may occur in the absence of signal. * Lighting is delayed. * No lighting may occur at low temperature.
Damping resistance
If the product of tuning capacitance and damping resistance is equal to that of values recommended above (e. g. tuning capacitance=82pF, damping resistance=4.7k), other characteristics (demodulation output, S/N, THD, etc.) than the LED drive characteristic remain almost unaffected. * For applications where a double tuning coil is used, refer to "Applications where a double coil is used" on page 13.
No.1506-3/14
LA1260
How to apply FM AFC The S curve at the FM output pin (pin 8) is as shown in Figure 1. Therefore, the domestic (Japan) band (lower local oscillation) use and foreign band (upper local oscillation) use differ as shown in Figures 2 and 3.
Figure 1
Figure 2 Domestic (lower local oscillation) band
Figure 3 Foreign (upper local oscillation) band
Unit (resistance : , capacitance : F)
AM local oscillation Since the LA1260 contains an ALC circuit, the oscillation level at pin 16 can be limited to 60 to 150mV in the following applications where a coil is used.
Unit (capacitance : F)
Stable oscillation occurs at a coil impedance of 5k or greater viewed from across pins 16 and 15. Turn ratio n and QO must be determined so that the oscillation level at pin 16 becomes 75mV or greater for MW use and 60mV or greater for SW use. If turn ratio n is increased more than needed, the oscillation level at pin 16 drops, thereby lowering the maximum sensitivity as shown in Figure 5 and 6. Figure 7 shows the relation between turn ratio n and oscillation level at pin 16 in the MW band.
Unit (capacitance : F)
Figure 4
Figure 5 21MHz reception mode Maximum sensitivity, VS Usable sensitivity, QS - dB/m Maximum sensitivity, VS Usable sensitivity, QS - dB/m
Figure 6 fr=1000kHz reception Usable sensitivity (S/N=20dB)
Maximum sensitivity (input at detection output -30dBm)
Maximum sensitivity (input at detection output -30dBm)
Usable sensitivity (S/N=20dB)
OSC injection voltage at pin 16 - mV
OSC injection voltage at pin 16 - mV
No.1506-4/14
LA1260
Figure 7 MW OSC characteristic OSC voltage at coil end, VOSC - mV
Relation between turn ration n and OSC level OSC voltage at coil end
Receiving frequency, fr - Hz
AM oscillation coil Generally speaking, the following should be noted. Winding with loose coupling between 1 and 2 and between 1 and 3 must be avoided. (Particularly SW1, SW2). To put in concretely, the pot core type is better than the screw core type which is loose in coupling. This prevents the local oscillation frequency from turning third resonance frequency related to the coupling coefficient.
Unit (capacitance : F)
LED unlighted time and distortion in AM (MW) By increasing the value of the electrolytic capacitor for AGC at pin 11 (Figure 8), the distortion in the AM mode can be improved, but the LED unlighted time is made longer. 10F is recommended for obtaining the optimum LED unlighted time and distortion. The LED unlighted time is 200ms at this value (Approximately 400ms at 22F). FM-AM selection and dc level at pin 12 (1) Pin 12-used method=recommended circuit The FM mode is entered with pin 12 open. When pin 12 and pin 6 are at the same potential in terms of DC, the AM circuit is turned on by the internal switch. It should be noted that the dynamic range is narrowed whether the potential at pin 12 is lower or high than that at pin 6. (2) Pin 13-used method The AM mode is entered with pin 13 open. When pin 13 is grounded, the FM circuit is turned on and the AM circuit is turned off by the internal switch. In this case, pin 12 and pin 6 (VCC) are at the same potential.
Figure 8 Total harmonic distortion, THD - % Input 100dBm VCC=4.5V AM mod. char. and electrolytic capacitor at pin 11.
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Unit (capacitance : F) Modulation degree - %
No.1506-5/14
V16 OSC voltage - mV
V16 OSC voltage
LA1260 FM IF/MW Test Circuit
L1 TN10896 (Mitsumi) T1 YT-30194 (Mitsumi), 2153-4095-239 (Sumida) T2 KW-30011 (Mitsumi) T3 YT-30105 (Mitsumi) Unit (resistance : , capacitance : F)
[FM Characteristics]
Noise voltage, VN detection output, VO - dBm MW input char. 1MHz reception
Total harmonic distortion, THD - %
Current drain
Detecti
on outp
ut
N vo oise lta ge
Voltage at pin 11 LED lighted
Antenna input voltage, VIN - dB/m MW fidelity char. Total harmonic distortion, THD - %
Antenna input voltage, VIN - dB/m Sensitivity char. f=1MHz Output 25mV const Attenuation - dB
Attenuation Input 30% mod. Attenuation - dB
Distortion
Modulation frequency - Hz
Frequency, - kHz
No.1506-6/14
Current drain, ICC - mA
Voltage at pin 11 - V
LA1260
- dBm MW detuning char. Sensitivity dB/m Interference - dB IF interference MW receiving char. Tracking adjust at each freq.
Detection output
Usable sensitivity Max. sensitivity detection output 20mV) Receiving frequency, f - kHz
Frequency, f - Hz
Whistle output - dBm
Input 100dB/m
OSC voltage - mVrms
OSC coil end
IC injection end V16
Receiving frequency, f - kHz
Frequency, f - kHz
Detection output (400Hz-30% mod.) Detection output, Whistle output - dBm
Reception : 1MHz MW char.
Whistle max
[FM Characteristics]
Input voltage - dB/m Detection output 400Hz-75kHz dev Total harmonic distortion, THD - %
Response - dB
Frequency, f - Hz
Detection output, Noise output - dBm
AM output
Noise voltage
IF input voltage - dB
IF input voltage - dB
No.1506-7/14
LA1260
Voltage at pin 11, V11 - V
ICC no input Current drain, ICC - mA Current drain, ICC - mA Current drain, ICC - mA Detection output - dB Sensitivity - dB/m Detection output Sensitivity output 20mV Voltage at pin 11 - V Voltage at pin 11, 11V - V Total harmonic distortion, THD - % Voltage at pin 11, V11 - V
ICC (including no LED current)
LED light sensitivity
quiescent LED lighted IF input voltage - dB Supply voltage, VCC - V Detection output OSC voltage, VOSC - mV Sensitivity - V Detection output - dBm
Current drain, ICC Quiescent
OSC frequency (20MHz) OSC frequency, fOSC - kHz
-3dB limiting sensitivity LED lighted sensitivity Input=80dB Input=45dB Voltage at pin 11 No input
Injection voltage V16
Supply voltage, VCC - V OSC frequency (20MHz) OSC voltage at pin 16, VOSC - mV OSC voltage, Voltage at pin 16 - mV Noise voltage, VN - dBm Detection output - dBm Current drain, ICC - mA OSC frequency, fOSC - kHz
Supply voltage, VCC - V
Input 60dB THD input 100dB ICC no input
Injection voltage V16
THD input
Detection output
Input
Supply voltage, VCC - V
V11 input 60dB
OSC frequency, fOSC - kHz
OSC frequency
OSC voltage
V11 quiescent LED lighted sensitivity S/N 20mV sensitivity Output 20mV sensitivity
Sensitivity - dB
Ambient temperature, Ta - C
Ambient temperature, Ta - C
No.1506-8/14
LA1260
OSC voltage at pin 16 VOSC(V16) - mV Voltage at Distortion, Noise voltage - dBm Detection output pin 11, V11 - V - dBm THD - %
OSC frequency, fOSC - kHz
Detection output
OSC frequency OSC voltage
Noise voltage
Distortion
0dB ain 8 nt dr e Curr Quiescent
Ambient temperature, Ta - C Voltage at pin 15 : Vref, V15 - V
Voltage pin 11
Voltage at pin 15
Quiescent
Output voltage V18 Quiescent
Sensitivity - dB
FM output voltage, V8 - V
LED lighted sensitivity
THD min,
-3dB limiting sensitivity
Ambient temperature, Ta - C
Ambient temperature, Ta - C
Sample Application Circuit 1 : FM IF/SW2 (7.2 to 24.0MHz)
T1 YT-30194 (Mitsumi), 2153-4095-339 (Sumida) T2 KW-30011 (Mitsumi) T6 YT-30112 (Mitsumi) T7 YT-30117 (Mitsumi), 2158-4140-044 (Sumida) Unit (resistance : , capacitance : F)
No.1506-9/14
Current drain,ICC - mA
LA1260
Image interference - dB Sensitivity - dB SW2 input char. Input at detection output -30dBm Max. sensitivity Detection output - dBm
Usable sensitivity S/N=20dB
Detection output 30% mod.
Image interference
Noise voltage
Receiving frequency, fr - Hz SW OSC char. No tap OSC voltage, VOSC - V Voltage at pin 11, V11 - V Total harmonic distortion, THD - % LED lighted Receiving frequency, fr - Hz IEC input voltage - dB
Voltage at pin 16
Voltage at pin 11
st Di
or
tio
n
OSC voltage, VOSC - V
Detection output 30% mod. Detection output - dBm
Noise voltage
SW2 input char. Total harmonic distortion, THD - % LED lighted
Voltage at pin 11, V11 - V
Voltage at pin 11
D
o ist
rti
on
IEC input voltage - dB
No.1506-10/14
LA1260
8.5MHz spurious response Output -39dBm (referenced to ANT input 24.5dB, 8.5MHz) Spurious - dB Spurious - dB 8.5MHz to 9.4MHz spurious response Output -30dBm (referenced to ANT input 24.5dB, 8.5MHz)
Image frequency
OSC frequency
Frequency, f - MHz
OSC frequency Receiving frequency, fr - MHz
SW input/output char. Detection output, Noise voltage - dBm Total harmonic distortion, THD - % LED lighted Detection output - dBm Total harmonic distortion, THD - % Detection output AM mod. output
30% detection output
tort
ion
ise
ou t
pu
t
Dis
Noise voltage
No
Distortion ANT input voltage - dB
ANT input voltage - dB/m
No.1506-11/14
T4 : YT-30224 (Mitsumi) FM IF L1 T2 L3 T1 TN10896 bar antenna (Mitsumi) 5.5mm air core 0.88mm wire 4T RF 5.5mm air core 0.88mm wire 3T OSC YT-30194 (Mitsumi), 2153-4095-339 (Sumida) T2 KW-30011 (AM Mix) T3 T4 T5 T6 T7 YT-30105 (Mitsumi) YT-30224 (Mitsumi) YT-30134 (Mitsumi) YT-30112 (Mitsumi) YT-30117 (Mitsumi) 2158-4140-044 (Sumida) Unit (resistance : , capacitance : F)
LA1260
Sample Application Circuit 2 : FM (band in US) /MW/SW1 (2.2 to 7.5MHz) /SW2 (7.2 to 24.0MHz)
Application where the LA1185 and LA1260 are used [Circuit Diagram] (The sample printed circuit pattern is shown on page 13.)
Internal 100pF, external 5pF
No.1506-12/14
LA1260 Sample Printed Circuit Pattern : Cu-foiled area (The circuit diagram is shown on page 12.)
Unit (resistance : , capacitance : F)
Detection output, Noise voltage - dBm
Detection output
AM output Total harmonic distortion, THD - %
Noise voltage
Distortion ANT input voltage - dB
LED lighting sensitivity 11.5dB
* Applications where a double tuning coil is used (See page 3.) The use of the following coil improves the distortion approximately 0.1% at 100% modulation.
(Korin Giken)
(Korin Giken)
(Mitsumi)
(Mitsumi)
No.1506-13/14
LA1260
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, the failure of which may directly or indirectly cause injury, death or property lose. Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibilty for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. 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 November, 1997. Specifications and information herein are subject to change without notice.
No.1506-14/14

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