SANYO LA1824 Datasheet

Ordering number : ENN*6855

Preliminary

LA1824

Monolithic Linear IC

LA1824

Single Chip Tuner IC for Use

in Radio/Cassette Products with Manual Tuning

Overview

The LA1824 is a single-chip tuner IC that incorporates
FM/AM and MPX circuits.
The built-in MPX-VCO allows this IC to be adjustment free
and to require no external components.

Features

•

FM, AM and MPX integrated in a single-chip.

• Adjustment free MPX-VCO

Package Dimensions

unit : mm

3067A

[LA1824]

21.0

24

13

6.4

7.62

: No ceramic resonator used.

• FM front-end : Local OSC voltage reduced.

• FM stereo and FM/AM tuning indicator

output provided.

• Package : DIP-24S.

Functions

FM : RF amplifier, mixer, oscillator, IF amplifier,

detector, signal meter, tuning indicator.

(0.71)

1

0.9

1.78

0.48

12

(3.25)

3.9max

3.3

0.51min

0.95

SANYO : DIP-24S(300mil)

AM : RF amplifier, mixer, oscillator (with ALC),

IF amplifier, detector, AGC, tuning indicator.

MPX : PLL stereo decoder, stereo indicator, VCO on chip, forced monaural.

Specifications

Maximum Ratings at Ta = 25 °C

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage VCC max 7.0 V
Indicator drive current I
Allowable power dissipation Pd max Ta ≤ 70 °C 300 mW
Operation temperature Topg --20 to +70 °C
Ambient temperature Tstg --40 to +125 °C

LED

Pin 8, 9 20 mA

0.25

Recommended Operating Conditions at Ta = 25 °C

Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
Operation supply voltage range VCC op 2.5 to 6.0 V

Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft's
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.

CC

4.5 V

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

11201 RM (IM)

No.6855-1/10

LA1824

Operating Characteristics at Ta = 25 °C, V

= 4.5 V, in the specified test using

CC

the IC179-2 socket (Yamaichi Electric Co.,Ltd.)

FM front-end characteristics at fc = 98 MHz, fm = 1 kHz, 22.5 kHz dev

Parameter Symbol Conditions

Local oscillator voltage V

Input limiting voltage 3 dB L.S.
Quieting sensitivity Q.S. 30 dB quieting sensitivity -- 12 -- dBµV EMF

OSC

No input, fosc = 108.7 MHz, the pin 20 output
with FET buffer gain ·=· --10 dB
Referenced to VIN = 60 dBµV EMF,

22.5 kHz dev, a 3 dB down input

min typ max

Ratings

15 30 60 mVrms

-- 1 3 -- dB µV EMF

Unit

FM IF characteristics (monaural) at fc = 10.7 MHz, fm = 1 kHz, 75 kHz dev

Parameter Symbol Conditions

Quiescent current ICC(FM) No input 7.0 13.7 20 mA
Demodulation output V
Signal-to-noise ratio S/N VIN = 100 dBµV, the pin 16 output 62 70 -- dB
Total harmonic distortion (mono) THD VIN = 100 dBµV, the pin 16 output -- 0.4 1.2 %

Input limiting voltage 3 dB L.S.

Station detector sensitivity SD-ON

VIN = 100 dBµV, the pin 16 output 130 190 260 mVrms

O

Referenced to V
75 kHz dev, a 3 dB down input
No mod, an input level great enough to turn
on the station detector

= 100 dBµV,

IN

min typ max

Ratings

21 32 42 dBµV

-- 3 3 -- dB µV

Unit

FM IF characteristics (stereo) at fc = 10.7 MHz, fm = 1 kHz, L + R = 90 %, Pilot = 10 %

Parameter Symbol Conditions

Separation SEP

Stereo on level ST-ON

Total harmonic distortion (main) THD

min typ max
VIN = 100 dBµV, L modulation, the pin
16 output/the pin 17 output
VIN = 100 dBµV, the pilot modulation
search that V8 < 0.5 V
VIN = 100 dBµV, Main modulation, the pin
16 output

Ratings

25 40 -- dB

1.5 3.5 6.3 %

-- 0.5 1.2 %

Unit

AM characteristics at fc = 1000 kHz, fm = 1 kHz, 30 % modulation

Parameter Symbol Conditions
Quiescent current ICC(AM) No input 5.0 8.5 15 mA
Detector output

Signal-to-noise ratio

Total harmonic distortion

Station detector sensitivity SD-ON

VO(1) V

VO(2) V
S/N(1) V
S/N(2) V

THD(1) V
THD(2) V

= 23 dBµV, the pin 16 output 18 40 70 mVrms

IN

= 80 dBµV, the pin 16 output 50 85 130 mVrms

IN

= 23 dBµV, the pin 16 output 15 20 -- dB

IN

= 80 dBµV, the pin 16 output 47 53 -- dB

IN

= 80 dBµV, the pin 16 output -- 0.5 1.3 %

IN

= 107 dBµV, the pin 16 output -- 0.5 1.5 %

IN

No mod, an input level great enough to turn
on the station detector

min typ max

Ratings

-- 2 6 -- dB µV

Unit

No.6855-2/10

Block Diagram

LA1824

CC

V

V-AGC

DET

MN ST

+

DET

PILOT

AM FM

+

L-OUT

R-OUT

+

COMP

PHASE

DECODER

VCO FF FFFF

ST SW

AGC

DET

S-METER

AM-IF

IF

FM

ST

TUN

LED

LED

+

FM ST

AM / FM

TUN

450kHz

+

10.7MHz

FM Ant

TRIG

19 17

20

FM

OSC

2GND2

CC

V

FM

MIX

24 23 22 21 18 16 15 14 13

RF

FM

B.P.F

AM

MIX

AM

AM

RF

GND1

1

CC

OSC

REG V

+

1 2 3 4 5 6 7 8 9 10 11 12

AM Ant

ILA00376

No.6855-3/10