Sanyo LA1823 Specifications

Ordering number : ENN*6854

Preliminary

LA1823

Monolithic Linear IC

LA1823

Single-Chip Tuner IC

for Use in Radio Cassette Recorder

Overview

The LA1823 is a single-chip tuner IC that incorporates
FM/AM and MPX circuits and supports electronic tuning.
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.

• FM front-end : Local OSC voltage reduced.

• Adjustment free MPX-VCO

: No ceramic resonator used.

• Adjustment free FM-DET

Package Dimensions

unit : mm

3067A

[LA1823]

21.0

24

1

0.9

13

12

: Using ceramic discriminator.

• Build in FM stereo indicator.

• Build in FM/AM IF count buffer.

• Build in AM OSC buffer.

• Package : DIP-24S.

(0.71)

1.78

0.48

0.95

SANYO : DIP-24S(300mil)

Functions

FM : RF amplifier, mixer , oscillator, IF amplifier, detector, signal meter, IF count buffer output.
AM : RF amplifier, mixer, oscillator (with ALC), oscillator buffer output, IF amplifier, detector, AGC,

IF count buffer output.

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

Specifications

Maximum Ratings at Ta = 25 °C

6.4

7.62

(3.25)

3.9max

0.51min

0.25

3.3

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
Operating temperature Topg --20 to +70 °C
Storage temperature Tstg --40 to +125 °C

LED

Pin 8 20 mA

Operating Conditions at Ta = 25 °C

Parameter Symbol Conditions Ratings Unit
Recommended supply voltage V
Operation supply voltage range VCC op 1.8 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.6854-1/10

LA1823

Operating Characteristics at Ta = 25 °C, V

= 4.5 V, in the specified test circuit using

CC

the IC59-2043-2 socket (Yamaichi Electric Co.,Ltd.)

Quiescent supply current

Parameter Symbol Conditions

FM-mode quiescent current ICC(FM) No input 10.0 15.0 20.0 mA
AM-mode quiescent current ICC(AM) No input 6.5 9.2 14.5 mA

min typ max

Ratings

Unit

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

Parameter Symbol Conditions

Input limiting voltage --3 dB L.S.

Local oscillator voltage V

OSC

min typ max

Referenced to VIN = 60 dBµV EMF,

22.5 kHz dev, a 3 dB down input
fosc = 108.7 MHz
with FET buffer gain ·=· 0 dB

Ratings

12 dBµV EMF

100 mVrms

Unit

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

Parameter Symbol Conditions

Demodulation output V
Signal-to-noise ratio S/N VIN = 100 dBµV6372dB
Total harmonic distortion (mono) THD VIN = 100 dBµV 0.5 1.5 %

Input limiting voltage --3 dB L.S.
IF count buffer on level IF buff on IF count buffer on 35 45 55 dBµV
IF count buffer output V

IF buff

VIN = 100 dBµV 135 180 240 mVrms

O

Referenced to V
75 kHz dev, a 3 dB down input

Test from pin 7 for
VIN = 100 dBµV, no modulation

= 100 dBµV,

IN

min typ max

Ratings

31 38 45 dBµV

120 180 240 mVrms

Unit

FM IF characteristics (stereo) at fc = 10.7 MHz, fm = 1 kHz, 75 kHz dev, L + R = 90 %, PILOT = 10 %

Parameter Symbol Conditions

Separation SEP VIN = 100 dBµV2540dB
Stereo on level ST-ON VIN = 100 dBµV, Pilot modulation 2.4 3.5 7.2 %
Total harmonic distortion (main) THD VIN = 100 dBµV 0.5 1.7 %

min typ max

Ratings

Unit

AM characteristics at fc = 1 MHz, fm = 1 kHz, mod = 30 %

Parameter Symbol Conditions

Detector output

Signal-to-noise ratio
Total harmonic distortion THD V

OSC buffer output V
IF count buffer on level IF buff on IF count buffer on 15 25 32 dBµV

IF count buffer output V

VO(1) V

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

buff Test from pin 8 for no input 80 100 160 mVrms

OSC

IF buff

= 23 dBµV 17 30 53 mVrms

IN

= 80 dBµV 50 75 120 mVrms

IN

= 23 dBµV1520dB

IN

= 80 dBµV4754dB

IN

= 80 dBµV 0.5 1.5 %

IN

Test from pin 7 for
VIN = 80 dBµV, no modulation

min typ max

Ratings

110 180 220 mVrms

Unit

No.6854-2/10

Block Diagram

LA1823

V

CC

FM

ST

MONO

FM

AM

+

+ +

R-OUT L-OUT

+

DET

DET

PILOT

COMP

PHASE

DECODER

MUTEV

FM

OSC

2GND2

CC

FF FFFF

VCO

ST SW

FM

TRIG

MIX

AGC

AM

DET

FM

S-METER

ST

SD

OSC

BUFFER

AM

FM

IF

IF

IF

BUFFER

1 GND1

CC

+

450kHz

10.7MHz

Buff

AM OSC
ST

Mute

IF Buff

AM / FM

+

Vtune

FM Ant

BPF

AM

24 23 22 21 20 19 18 17 16 15 14 13

FM

RF

AM

MIX

RF

AM

OSC

REG V

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

+

AM Ant

ILA00300

No.6854-3/10