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Ordering number : EN2291B
Monolithic Linear IC
LA1266
AM/FM Tuner System Of Electronic Tuning Type
Functions
FM : IF amplifier, quadrature detector, AF preamplifier, signal meter, IF count outputlifier, tuning indicator drive output (common with stop signal, muting drive output) AM : RF amplifier, MIX, OSC (with ALC), IF amplifier, detector, AGC, signal meter, tuning indicator drive output (common with stop signal), IF count output, local OSC buffer.
Package Dimensions
unit : mm 3067-DIP24S
[LA1266]
Features
* Minimum number of external parts required. * Excellent S/N * Local OSC with ALC * Local OSC buffer * Tuning indicator pin (common with narrow-band stop signal and muting drive output) * Variable stop sensitivity (variable separately for FM, AM) * Less tweet interference * Signal meter pin * IF count output
SANYO : DIP24S
Specifications Maximum Ratings at Ta=25C
Parameter Maximum supply voltage Flow-in current Flow-out current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max I8 I22 I24 Pd max Topr Tstg Pin 8 Pin 22 Pin 24 Ta60C Conditions Pins 7,8,20 Ratings 16 20 1 2 700 -20 to +70 -40 to +125 Unit V mA mA mA mW C C
Operating Conditions at Ta=25C
Parameter Recommended supply voltage Operating voltage range Symbol VCC VCC op Conditions Ratings 8.5 6 to 14 Unit V V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN N3097HA (KT)/41594HK/9047AT/7256KI, TS No.2291-1/11
LA1266 Operating Characteristics at Ta=25C, VCC=8.5V, See Test Circuit.
Parameter [AM : fc=1MHz, fm=1kHz] Quiescent current Detection output Signal to noise ratio Total harmonic distortion Signal meter output LED drive sensitivity Local OSC buffer output IF buffer output [FM : fc=10.7MHz, fm=1kHz] Quiescent current Input limiting sensitivity Demodulation output S/N ratio Total harmonic distortion Signal meter output LED drive sensitivity LED drive bandwidth AM rejection ratio IF buffer output Icco -3dBL.S. VO S/N THD VSM1 VSM2 LED-ON LED-BW AMR VIF No input 3dB down, 100% mod. VIN=100dB, 100% mod. VIN=100dB VIN=100dB, 100% mod. No input VIN=100dB ILED=1mA VIN=100dB, ILED=1mA VIN=100dB, 100% mod. AM-1kHz, 30% mod. VIN=50dB 110 160 230 mV 0 1.7 46 70 45 270 78 29 31 390 84 0.03 0 2.3 61 105 58 0.3 0.2 3.1 76 140 40 37 540 mA dB mV dB % V V dB kHz dB Icco VO1 VO2 S/N1 S/N2 THD1 THD2 VSM1 VSM2 LED-ON VOSC VIF No input VIN=20dB, 30% mod. VIN=80dB, 30% mod. VIN=20dB VIN=80dB VIN=80dB, 30% mod. VIN=107dB, 30% mod. No input VIN=80dB ILED=1mA fosc=1.45MHz VIN=20dB 0 1.8 13 220 120 30 90 15 49 22 60 150 19 54 0.3 0.3 0 2.8 23 280 180 1.0 1.0 0.2 3.5 33 340 250 30 110 210 mA mV mV dB dB % % V V dBm mV mV Symbol Conditions Ratings min typ max Unit
Equivalent Circuit Block Diagram
No.2291-2/11
LA1266 How to use LA1266
1. LED driver, muting drive output, stop signal(SD). * For LED drive, muting drive output, stop signal, the output at pin 8 is used. * Voltage on pin 8, when tuned, turns from "H" to "L" . (Active-low) * Signal bandwidth at pin 8 - For AM, the bandwidth depends on the C.F(BFU450CN) at pin 14. If a capacitor is connected in place of the C.F, the bandwidth will get wider. - For FM, the bandwidth depends on the resistance across pins 9 and 22. If the resistance is increased, the bandwidth will get narrower. R=15k makes the bandwidth approximately 110kHz. LED Drive Bandwidth
-
Resistance across Pins 9 and 22
LED drive bandwidth - kHz
Resisitance across Pins 9 and 22 - k
* Sensitivity adjustment of LED, muting, stop signal - For FM, the semifixed variable resistor across pin 16 and GND is used. - For AM, the semifixed variable resistor across pin 17 and GND is used. The relation (for AM,FM) between signal meter voltage and input voltage with the resistance of the semifixed variable resistor as a parameter is shown below.
FM S Meter Voltage
AM S Meter Voltage
S meter voltage - V
IF input voltage - dB Unit (capacitance : F)
S meter voltage - V
Antenna input voltage - dB/m
No.2291-3/11
LA1266
2. AM/FM changeover * AM/FM changeover is made using pin 20 as shown right. * However, the voltage on pin 20 relative to VCC (pin 7) must be within the range of +0.1V to - 0.8V. If not within this range, distortion and selectivity will get worse. A resistance of 68k at the IFT cold terminal, which is used to prevent the changeover circuit from malfunctioning, must be connected.
68k
3. Local OSC buffer output * When local OSC buffer output waveform is saw-toothed at the SW mode, connect a reistance of 1.2k or thereabouts across pin 24 and GND. 4. Capacitance across pin 9 and GND A large capacitance across pin 9 and GND may cause a V9 - Modulation Frequency misstop at an adjacent channel when the channel select speed is made faster at the autmatic channel select mode. In thes case, decrease the capacitance across pin 9 and GND. However, if too decreased, the LED will flutter at low modulation frequencies at the time of detuning. Therefore, it is recommended to fix the capacitance across pin 9 and GND to be 3.3F to 10F. The relation between modulation frequency and demodulation output voltage on pin 9 with the capacitance across pin 9 and GND as a parameter is shown right.
V9
-
mVrms
Modulatin frequency
-
Hz
5. If the coupling coefficient of the local OSC coil is small and an antiresonance point of approximately 100MHz is present or the stray capacitance across pin 24 and pin 23 is large, a parasitic oscillation of approximately 100MHz may occur in the buffer output (pin 24). In this case, connect a capacitance of approximately 30pF across pin 24 and GND. 6. AM OSC coil Generally speaking, the following should be noted. Avoid winding with loose coupling between primary side and secondary side (especially SW1, SW2). To be concrete, the pot core type is better than the screw type which is loose in coupling. This prevents the local OSC frequency from turning third resonance frequency related to the coupling coefficient. 7. Resistance across pin 8 and VDD If pin 8 is used for stop signal (SD) only, without using LED, it is recommended to fix resistance RL across pin 8 and VDD to be 51k to 100k. 8. To prevent whistle from worsening, make the pattern of AM output pin 15 as short as possible. 9. AM, FM IF buffer output Application of a voltage to pin 13 (STRQ) causes AM IF(455kHz) signal (at AM mode) and FM IF(10.7MHz) signal (at FM mode) to be delivered at pin 11 and pin 10, respectively. It is recommended that the voltage to be applied to
No.2291-4/11
LA1266 Test Circuit : FM, AM-MW
Unit (resistance : , capacitance : F)
AM Current Drain Characteristic
FM Current Drain Characteristic
Current drain, ICC - mA
Current drain, ICC - mA
ICC (Inciuding no LED
current)
(Inciuding no LED current)
Antenna input voltage - dB/m
Input voltage, VIN - dB
AM Input/Ontput Characteristic
Noise voltage, Detection output - dBm
Detection output 1kH z-30%
THD - VIN(ANT)
Total harmonic distortion, THD - %
Noise voltage
Antenna input voltage - dB/m
Antenna input voltage, VIN(ANT) - dB/m
No.2291-5/11
LA1266
AM S Meter Current Characteristic
Non-modulation See Test Circuit. S meter current, ISM - mA S meter voltage,Vsm - V
AM S Meter Voltage Characteristic
Non-modulation See Test Circuit.
Antenna input voltage - dB/m
Antenna input voltage - dB/m
Fidelity Characteristic
Total harmonic distortion, THD - % f=1MHz 100dB/m Input constant 30% mod Attenuation - dB
Selectivity Characteristic
f=1MHz 1kHz-30% mod Output 50mV constant Attenuation - dB
At ten ua tio n
Distorrion
Modulation frequency - Hz
Frequency, f - kHz
AM VCC Characteristic
Current drain, ICC - mA Detection output - dBm
AM Temperature Characteristic (1)
tput Detection ou, 1kHz-30% mod Input=80dB
Current drai
n, ICC no sign
al
Detection output (Input=100dB/m)
Detection output - dBm
S/N Input=80dB
LED lightin
g sensitivity
Input=100dB/m
THD input=80dB, 1kHz-30% mod S meter voltage, VSM - V
IF output Input=80dB Input=20dB
S meter voltage
IF buffer output - mV
Input=45dB/m
IF output Input=80dB Input=20dB
Input=0
Supply voltage,VCC - V
Ambient temperature, Ta - C
No.2291-6/11
Total harmonic distortion, THD - %
Sensitivity - dB/m
Output 30mV sensitivity
IF buffer output - mV
If buffer output (Input=45dB/m)
S/N - dB
LA1266
AM Temperature Characteristic(2)
S meter voltage, VSM - V
FM Input/Output Characteristic
Detection output 1kHz-75kHz dev Noise voltage, AM output, Detection output - dBm
VSN input=80dB
VSN input=25dB
AM output 1kHz-30% mod
VSN no input
Noise Voltage LED-on Voltage - V LED-on voltge
IF input voltage
- dB f=10.7MHz
Distortion Characteristic
Total harmonic distortion, THD - %
Sensitivity - dB
S/N=20dB sensitivi
ty, 1kHz-30% mod
LED-lighting sensitivity
Output 20mV sensitivity,1kHz-30% mod
THD 1kHz-75kHz dev IF input voltage - dB
Ambient temperature, Ta - C
FM S Meter Characteristic
Non-modulation See Test Circuit. S meter current, ISM - A
FM VCC Characteristic
Detection output (Input=100dB)
Current drai
n, ICC no sign
al
-3dB limiting sensitivity Detection output - dBm
Sensitivity - dB
IF input voltage - dB
IF buffer output (Input=
50dB )
FM S Meter Voltage Characteristic
Non-modulation See Test Circuit. S meter voltage, VSM - V
LED lighting sensitivity
Input=100dB
S meter voltage Input=100dB 0dB
IF input voltage - db
Supply voltage, VCC - V
No.2291-7/11
S meter voltage, VSM - V
IF buffer output - mV
Current drain, ICC - mA
LA1266
FM Temperature Characteristic(1)
Detection output - dBm
Detection output mod Input=100dB , 1kHz-100%
Inpu ut outp t=10 0dB
FM Temperature Characteristic(1)
IF buffer output - mV
IF b
uffe
r
Total harmonic distortion, THD - %
S/N - dB
Sensitivity - dB
S/N Input=100dB
LED-on voltage LED lighting sensitivity
THE Input=100dB , 1kHz-100% mod
S meter voltage, VSM - V
VSM Input=100dB
-3dB lim
VSM Input=50dB
sitivity, iting sen 1kHz-100% mod LEDBW, I nput= 100dB
VSM no input Ambient temperature, Ta - C Ambient temperature, Ta - C
AM Receiving Characteristic
Sensitivity - dB/m Interference - dB
IF interference
Ima
ge i
nter
fere
nce
Usable sensitivity (1kHz - 30%mod,
S/N=20dB)
Maximum sensistivit y (1kHz - 3 0% mod, detection o
utput 40m
V)
Tracking adjust at each frequency. Receiving frequency, fr - kHz
No.2291-8/11
Bandwidth - kHz
LED-on voltage - V
LA1266 Coil Specifications
MW antenna Bar antenna (for PVC22KTL) *TN-10896 (Mitsumi)
Tight solenoid direct winding space winding tight solenoid winding
Loop antenna (for SVC321) * LA300 (Korin Giken) Loop antenna. matching coil * KL-412
YT-30150 (Mitsumi)
* KO-387 (Korin Giken) For SVC321
AM IFT coil Matching coil for SFZ450B (2-element type)
FM double tuning detection coil HW-6146
HW-40131
(Mitsumi) (Mitsumi) Internal 180pF Internal 100pF10%
Unit (resistance : ) (Mitsumi)
Internal 100pF10%
No.2291-9/11
LA1266 Sample Application Circuit : LA1177, LA1266, LM7000
Unit (resistance : , capacitance : F)
No.2291-10/11
LA1266
LA1177+LA1266 Overall Characteristic
Detection output (75kHz dev.) Noise voltage, AM output, Detection output - dBm S meter voltage - V
LA1177+LA1266 Overall Characteristic
S meter (non-modulation,VR=15k) Total harmonic distortion, THD - %
AM output (1kHz-30%mod)
Noise voltage
THD (1kHz-75kHz dev.)
Input - dB
Input - dB
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 loss. 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.2291-11/11

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