LA1260-E - ON SEMICONDUCTOR - Datasheet.Directory

LA1260

Ordering number : EN1506D

FM/AM Tuner System

for Radio-Casette Recorders, Music Centers

Monolithic Linear IC

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

Functions

FM : IF amplifier, quadrature detector, AF preamplifier,

tuning indicator drive output.

AM : RF amplifier, MIX, OSC (with ALC), IF amplifier,

Detector, AGC, tuning indicator drive.

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)

Package Dimensions

unit : mm

3006B-DIP16

[LA1260]

SANYO : DIP16

• 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.

Specifications

Maximum Ratings at Ta=25°C, See specified Test Circuit.

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

max Pins 6, 12 9 V

Maximum current drain I

max Pins 6+7+12 50 mA

Flow-in current I

Pin 7 20 mA

Flow-out current I

Pin 15 0.1 mA

Allowable power dissipation Pd max Ta≤70°C 450 mW

Operating temperature Topr –20 to +70 °C

Storage temperature Tstg –40 to +125 °C

Operating Conditions at Ta=25°C

Parameter Symbol Conditions Ratings Unit

Recommended operating voltage V

4.5 V

Operating voltage range V

op 3.0 to 8.0 V

Operating Characteristics at Ta=25°C, V

CC=4.5V, See specified Test Circuit

Parameter Symbol Conditions Ratings

min typ max Unit

[AM Characteristics : f=1MHz]

Quiescent current Icco AM V

=No input 7.5 10.5 mA

Detection output V

=23dBμ, 400Hz-30% mod. –33 –28 –23 dBm

17.33155mV

S/N ratio S/N1 V

=23dBμ, 400Hz-30% mod. 18.0 21.5 dB

Detection output V

=60dBμ, 400Hz-30% mod. –19.0 –16.0 –13.0 dBm

87 122 174 mV

S/N ratio S/N2 V

=60dBμ, 400Hz-30% mod. 48 53 dB

Total harmonic distortion THD1 V

=60dBμ, 400Hz-30% mod. 0.45 1.3 %

THD2 V

=100dBμ, 400Hz-30% mod. 1.5 3.0 %

LED lighting voltage V

LEDAM

=1mA 22 30 38 dBm

Oscillation output (24MHz) V

OSC24M

60 86 120 mV

[FM Characteristics : f=10.7MHz]

Quiescent current IccoFM V

=No input 8.5 12.0 mA

–3dB sensitivity V

lim –3dB down, 400Hz-100% mod. 35 42 dBμ

Demodulation output V

=80dBμ, 400Hz-100% mod. –12.5 –9.5 –6.5 dBm

183 260 367 mV

S/N ratio S/N3 V

=80dBμ, 400Hz-100% mod. 77 81 dB

S/N4 V

=80dBμ, 400Hz-30% mod. 71 dB

Total harmonic distortion THD3 V

=80dBμ, 400Hz-100% mod. 0.55 1.2 %

THD4 V

=80dBμ, 400Hz-30% mod. 0.05 %

LED lighting voltage V

LEDFM

=1mA 39 49 dBμ

AM rejection ratio AMR V

=80dBμ, 400Hz-100% FM mod. 60 dB

1kHz-30% AM mod.

Equivalent Circuit Block Diagram

LA1260

No.1506-2/14

LA1260

No.1506-3/14

Unit (resistance : Ω, 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.

FM quadrature detection coil

• The values recommended for the detection coil are shown below. (See Figure 1.)

Tuning capacitance : 56pF

Damping resistance : 6.8kΩ

• Values other than recommended provide the LED drive characteristic as shown below.

Figure A Good example Figure B Bad example

Value increased Value decreased

Tuning capacitance • Lighting is delayed.

• No lighting may occur at low

temperature.

• Lighting is advanced.

• Mislighting may occur in the

absence of signal.

Damping resistance • Lighting is advanced.

• Mislighting may occur in the

absence of signal.

• Lighting is delayed.

• No lighting may occur at low

temperature.

If the product of tuning capacitance and damping resistance is equal to that of values recommended above (e. g.

tuning capacitance=82pF, damping resistance=4.7kΩ), 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.

Test Circuit

LA1260

No.1506-4/14

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.

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.

Stable oscillation occurs at a coil impedance of 5kΩor greater viewed from across pins 16 and 15. Turn ratio n and

Omust 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 1 Figure 2 Domestic (lower local

oscillation) band

Figure 3 Foreign (upper local

oscillation) band

Unit (resistance : Ω, capacitance : F)

Unit (capacitance : F)

OSC injection voltage at pin 16 – mV

Maximum sensitivity, V

Usable sensitivity, Q

– dB/m

Maximum sensitivity, V

Usable sensitivity, Q

– dB/m

OSC injection voltage at pin 16 – mV

21MHz reception mode f

=1000kHz reception

Maximum sensitivity

(input at detection

output –30dBm)

Maximum sensitivity

(input at detection

output –30dBm)

Usable sensitivity (S/N=20dB)

Usable sensitivity

(S/N=20dB)

Figure 5 Figure 6

Figure 4

LA1260

No.1506-5/14

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.

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 (V

CC) are

at the same potential.

Unit (capacitance : F)

Receiving frequency, f

– Hz

OSC voltage at coil end, V

OSC

– mV

V16 OSC voltage – mV

Figure 7

MW OSC characteristic

Modulation degree – %

Total harmonic distortion, THD – %

Figure 8

Input 100dBm

=4.5V

AM mod. char. and electrolytic

capacitor at pin 11.

100Hz, capacitor across pin 11 and Gnd : 10μF

V16 OSC voltage

OSC voltage at coil end

Relation between turn

ration n and OSC level

Unit (capacitance : F)

LA1260

No.1506-6/14

FM IF/MW Test Circuit

Unit (resistance : Ω, capacitance : F)

L1 TN10896 (Mitsumi)

T1 YT-30194 (Mitsumi), 2153-4095-239 (Sumida)

T2 KW-30011 (Mitsumi)

T3 YT-30105 (Mitsumi)

[FM Characteristics]

Antenna input voltage, V

– dB/m

Modulation frequency – Hz

Noise voltage, V

detection output, V

– dBm

MW input char.

1MHz reception

Antenna input voltage, V

– dB/m

Total harmonic distortion, THD – %

Attenuation – dB

MW fidelity char.

Frequency, Δ– kHz

Attenuation – dB

Sensitivity char.

f=1MHz

Output 25mV const

Attenuation

Distortion

Input 30% mod.

Total harmonic distortion, THD – %

Voltage at pin 11 – V

Current drain, I

– mA

Voltage at

pin 11

Current drain

LED lighted

Noise

voltage

Detection output

LA1260

No.1506-7/14

[FM Characteristics]

Frequency, Δf – Hz

Detection

output

– dBm

MW detuning char.

Receiving frequency, Δf – kHz

Sensitivity dB/m Interference – dB

MW receiving char.

Tracking adjust

at each freq.

IF interference

Usable sensitivity

Max. sensitivity

Receiving frequency, Δf – kHz

OSC voltage – mVrms

OSC coil end

Input voltage – dB/m

Detection output,

Whistle output – dBm

Detection output (400Hz-30% mod.)

IF input voltage – dBμ

Detection output,

Noise output – dBm

Detection output

IF input voltage – dBμ

Total harmonic distortion, THD – %

AM output

400Hz-75kHz dev

Noise voltage

Frequency, f – Hz

Response – dB

Reception : 1MHz MW char.

Whistle max

Frequency, Δf – kHz

Whistle output – dBm

Input 100dB/m

IC injection end V16

detection

output 20mV)

LA1260

No.1506-8/14

IF input voltage – dBμ

Voltage at pin 11, V11 – V

(including no LED current)

Supply voltage, V

– V

OSC frequency, Δf

OSC

– kHz

OSC voltage, V

OSC

– mV

OSC frequency (20MHz)

Supply voltage, V

– V

OSC frequency, Δf

OSC

– kHz

OSC voltage, Voltage at pin 16 – mV

OSC frequency (20MHz)

Ambient temperature, Ta – °C

OSC frequency, Δf

OSC

– kHz

OSC voltage at pin 16, V

OSC

– mV

OSC frequency

Ambient temperature, Ta – °C

Sensitivity – dBμNoise voltage, V

– dBm Detection output – dBm

Current drain, I

– mA

Total harmonic distortion, THD – %

Voltage at pin 11, 11V – V

Input 60dBμ

THD input 100dBμ

Input

THD input

V11 input 60dBμ

V11 quiescent

LED lighted

sensitivity

S/N 20mV sensitivity

Output 20mV

sensitivity

Detection

output

no input

OSC voltage

Injection voltage V16

Supply voltage, V

– V

Sensitivity – V

Detection output – dBm

Current drain, I

– mA

Voltage at pin 11, V11 – V

Detection output

–3dB limiting sensitivity

LED lighted sensitivity

Voltage at pin 11

Input=80dBμ

Input=45dBμ

No input

Current drain, I

Quiescent

Supply voltage, V

– V

Current drain, I

– mA

Sensitivity – dB/m

Detection output – dB

Current drain, I

– mA

Voltage at pin 11 – V

no input

Sensitivity output 20mV

LED light sensitivity

quiescent

LED lighted

Detection

output

LA1260

No.1506-9/14

Sample Application Circuit 1 : FM IF/SW2 (7.2 to 24.0MHz)

Unit (resistance : Ω, capacitance : F)

T1 YT-30194 (Mitsumi), 2153-4095-339 (Sumida)

T2 KW-30011 (Mitsumi)

T6 YT-30112 (Mitsumi)

T7 YT-30117 (Mitsumi), 2158-4140-044 (Sumida)

Ambient temperature, Ta – °C

OSC frequency, Δf

OSC

– kHz

OSC frequency

OSC voltage at pin 16 V

OSC

(V16) – mV

Ambient temperature, Ta – °C Ambient temperature, Ta – °C

FM output

voltage, V8 – V

Voltage at

pin 15 : Vref, V15 – V

Voltage at pin 15

Quiescent

THD min,

Output voltage V18

Sensitivity – dBμ

Voltage at

pin 11, V11 – V

THD – %

Distortion, Noise voltage – dBm

Current drain,I

– mA

Detection output

– dBm

OSC voltage

Detection

output

Noise

voltage

Voltage pin 11

Distortion

Quiescent

LED lighted

sensitivity

–3dB limiting

sensitivity

Current drain 80dBμ

Quiescent

LA1260

No.1506-10/14

Receiving frequency, f

– Hz

Image interference – dB Sensitivity – dBμ

Usable sensitivity

S/N=20dB

Receiving frequency, f

– Hz

OSC voltage, V

OSC

– V

OSC voltage, V

OSC

– V

IEC input voltage – dBμ

Voltage at pin 11, V11 – V

Total harmonic distortion, THD – %

SW OSC char.

No tap

SW2 input char.

Detection

output 30% mod.

Noise

voltage

Voltage

at pin 11

LED lighted

Distortion

Voltage at pin 16

Image interference

Input at detection

output –30dBm

Max. sensitivity

Detection output – dBm

IEC input voltage – dBμ

Voltage at pin 11, V11 – V

Total harmonic distortion, THD – %

SW2 input char.

Detection

output 30% mod.

Noise voltage

Voltage

at pin 11

LED lighted

Detection output – dBm

LA1260

No.1506-11/14

Frequency, f – MHz

Spurious – dB

OSC frequency

Image frequency

8.5MHz spurious response

Output –39dBm

(referenced to ANT

input 24.5dBμ, 8.5MHz)

ANT input voltage – dB/m

Detection output, Noise voltage – dBm

Total harmonic distortion, THD – %

SW input/output char.

ANT input voltage – dBμ

Detection output – dBm

Total harmonic distortion, THD – %

LED lighted

AM mod. output

Noise voltage

Distortion

Detection

output

30% detection

output

Noise output

Distortion

Receiving frequency, f

– MHz

Spurious – dB

OSC frequency

8.5MHz to 9.4MHz spurious response

Output –30dBm

(referenced to ANT

input 24.5dBμ, 8.5MHz)

LA1260

No.1506-12/14

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.)

Unit (resistance : Ω, capacitance : F)

L1 TN10896 bar antenna (Mitsumi) T3 YT-30105 (Mitsumi)

T2 5.5mmφair core 0.88mm wire 4T RF T4 YT-30224 (Mitsumi)

L3 5.5mmφair core 0.88mm wire 3T OSC T5 YT-30134 (Mitsumi)

T1 YT-30194 (Mitsumi), T6 YT-30112 (Mitsumi)

2153-4095-339 (Sumida) T7 YT-30117 (Mitsumi)

T2 KW-30011 (AM Mix) 2158-4140-044 (Sumida)

T4 : YT-30224 (Mitsumi)

FM IF

Internal 100pF, external 5pF

LA1260

No.1506-13/14

Sample Printed Circuit Pattern : Cu-foiled area (The circuit diagram is shown on page 12.)

• 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.

ANT input voltage – dBμ

Detection output, Noise voltage – dBm

Total harmonic

distortion, THD – %

Detection

output

AM output

Noise

voltage

Distortion

LED lighting sensitivity 11.5dBμ

(Korin Giken) (Korin Giken)

(Mitsumi) (Mitsumi)

Unit (resistance : Ω, capacitance : F)

LA1260

No.1506-14/14

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 guarant-

eed 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.