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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=25°C, 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 Ta70°C 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=25°C
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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LA1260 Operating Characteristics at Ta=25°C, 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=80dBµ, 400Hz-100% mod. VIN=80dBµ, 400Hz-100% mod. VIN=80dBµ, 400Hz-30% mod. VIN=80dBµ, 400Hz-100% mod. VIN=80dBµ, 400Hz-30% mod. IL=1mA VIN=80dBµ, 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 dBµ dBm mV dB dB % % dBµ dB Icco AM VO1 S/N1 VO2 S/N2 THD1 THD2 VLEDAM VOSC24M VIN=No input VIN=23dBµ, 400Hz-30% mod. VIN=23dBµ, 400Hz-30% mod. VIN=60dBµ, 400Hz-30% mod. VIN=60dBµ, 400Hz-30% mod. VIN=60dBµ, 400Hz-30% mod. VIN=100dBµ, 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. 10µF is recommended for obtaining the optimum LED unlighted time and distortion. The LED unlighted time is 200ms at this value (Approximately 400ms at 22µF). 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.
: nd µF 10

10

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z,

a cap

cit

or

o acr

ss

pi

1 n1

an

dG

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 ­ dBµ

IF input voltage ­ dBµ

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 ­ dBµ 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=80dBµ Input=45dBµ 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 60dBµ THD input 100dBµ ICC no input

Injection voltage V16

THD input

Detection output

Input

Supply voltage, VCC ­ V

V11 input 60dBµ

OSC frequency, fOSC ­ kHz

OSC frequency

OSC voltage

V11 quiescent LED lighted sensitivity S/N 20mV sensitivity Output 20mV sensitivity

Sensitivity ­ dBµ

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

µ 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 ­ dBµ

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 ­ dBµ 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 ­ dBµ

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 ­ dBµ

No.1506-10/14

LA1260
8.5MHz spurious response Output ­39dBm (referenced to ANT input 24.5dBµ, 8.5MHz) Spurious ­ dB Spurious ­ dB 8.5MHz to 9.4MHz spurious response Output ­30dBm (referenced to ANT input 24.5dBµ, 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 ­ dBµ

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 ­ dBµ

LED lighting sensitivity 11.5dBµ

· 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