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

Sample Application Circuit Diagram

FM-DET

ST

3.3µF

MONO

FM

AM

+

0.22µF

+ +

BUFF

FM OSC

3pF

1000pF

1.2kΩ
10Ω10Ω

33kΩ33kΩ33kΩ

0.047µF0.047µF

2SC2999

220kΩ

100Ω

1000pF

0.47µF

2700pF

pF

1000

pF

1000

3.3kΩ

6800pF6800pF

+

SVC201

SVC201

L-OUT

R-OUT

4.7µF

FM-OSC

FM-RF

8pF

12pF

FM

DET

DET

PILOT

COMP

PHASE

DECODER

MUTE

FM

OSC

2

CC

V

GND2

LA1823

FF FFFF

VCO

TRIG

ST SW

FM

MIX

AM

AM

FM

MIX

AGC

DET

S-METER

ST

SD

OSC

IF

AM

IF

FM

IF

BUFFER

AM

OSC

BUFFER

GND1

1

CC

V

REG

470pF

+

100pF

10kΩ

100pF

+

22µF

AM-MIX

kΩ

100

22pF

AM-OSC

10µF

CC

V

450kHz

Buff

AM OSC
ST

SEEK

IF Buff

AM / FM

10.7MHz
100µF

+

0.047µF

Vtune

FM Ant

BPF

1000pF

8pF

0.047µF

SVC348

0.047µF

100kΩ

ILA00301

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

FM

RF

AM

RF

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

AM Ant

10

pF

No.6854-4/10

LA1823

2

ACFA-450L08

GND

ILA00305

3

1
S

V

CC

S
4

6

Pin9

Coil specifications (bottom view)

• FM-BPF : SA-309 (Sumida) 88 MHz to 108 MHz

• FM-RF : SA-149 (Sumida) 3.6 mm diameter, air core, 0.6 mm wire, 4.5 T

• FM-OSC : SA-151 (Sumida) 3.6 mm diameter, air core, 0.6 mm wire, 3.5 T

• FM-IF filter, discriminator :

SK107M1-AE-10, CDF107F-AE-029 (Toko)
SFE10.7MA5, CDA10.7MG1-A (Murata) : tentative

• AM-OSC : SA-181 (Sumida) : L7BRS-3132AQ (Toko)

S
3

VC

2
1

GND

• AM-MIX : SA-1136 (Sumida) : PCFAZ-082 (Toko)

S
3

V

2

CC

Pin9

1

4

Pin3

6

V

S

ILA00302

S
4

CF

6

GND

CC

6-4 37 T 3-1 64 T
3-1 74 T 6-4 32 T

0.06UEW 0.06-2UEW
fo = 796 kHz fo = 796 kHz
Qo ≥ 80 Qo ≥ 65
L = 140 µH L = 140 µH

3-2 122 T 1-2 47 T
4-6 9 T 2-3 100 T
2-1 62 T 4-6 12 T

0.06UEW fo = 450 kHz
fo = 450 kHz, Qo ≥ 65 180 pF internal
180 pF internal With AM-IF filter

ILA00304

• AM-IF filter : SFU450B (Murata)

• MW Bar-antenna : C8E-A0105 (Toko)

1-2 67 T
3-4 9 T

2

S

3

4

Pin1GNDVC Pin2

ILA00306

fo = 796 kHz
Qu = 180 min
L = 260µH

S

1

VC

GND

S
3

2
1

4

6
S

ILA00302

Pin3

V

CC

No.6854-5/10

LA1823

Pin Descriptions and Quiescent Voltage at VCC = 4.5 V

Pin

number

Function voltage (V) Equivalent circuit Remarks

Quiescent

AM FM

2

1 AM-RF input 1.2 1.2

2 Reg 1.2 1.2

3 AM-OSC 4.5 4.5

1

2

3 4

Connect the AM antenna coil
between this pin and pin 2 (Reg)

ILA00307

ILA00308

Connect the AM oscillator coil
between this pin and pin 4
(VCC1)

ILA00309

4VCC1 4.5 4.5 AM/FM-IF/MPX block V

5 FM-MIX output 2.4 2.2 Rout = 270 Ω

5

Rout

ILA00310

CC

6 GND1 0 0 AM/FM-IF/MPX block ground

IF buffer

7 output and 4.5 4.5

mute switch

7

ILA00311

V7 ≥ 1.3 V : IF buffer output and
muting on

No.6854-6/10

LA1823

Pin

number

8

Function voltage (V) Equivalent circuit Remarks

Stereo
indicator,
AM-oscillator
buffer output

Quiescent

AM FM

4.5 4.5

8

Active-low
Open-collector output

AM oscillator signal is output in
AM mode

ILA00312

9

4

Connect the AM mixer coil

9 AM-MIX output 4.5 4.5

between this pin and pin 4
(VCC1)

ILA00313

10

10 FM-IF input 1.2 1.2 Rin = 330 Ω

2

Rin

ILA00314

11

11 AM-IF input 1.2 1.2 Rin = 2 kΩ

2

Rin

ILA00315

AM-AGC
output and

12

FM signal R = 16.6 kΩ

0.4 0.1

12

R

Internal load resistance

meter output

ILA00316

Recommended ceramic

13 FM-DET 3.9 3.7

13

discriminator :

CDF107F-AE-029 (T oko)
CDA10.7MG** (Murata)

ILA00317

No.6854-7/10

LA1823

Pin

number

Function voltage (V) Equivalent circuit Remarks

Pilot detector

14 filter 2.9 3.8

(forced mono)

Quiescent

AM FM

14

Forced monaural mode when pin
14 is connected to ground

ILA00318

15

Phase FM mode is when pin 15 is open,

15 comparator filter 0 3.8 and AM mode is when pin 15 is

(AM/FM switch) connected to ground

ILA00319

16 L output

17 R output

1.2 1.2 Rout = 7.5 kΩ

Rout

16

17

( )

ILA00320

18

18 MPX input 1.2 1.2 Rin = 50 kΩ

Rin

ILA00321

Output impedance
AM : Rout = 50 kΩ

AM/FM

19 detector 0.3 1.0

output

Rout(FM)

19

Rout(AM)

ILA00322

21 20

FM : Rout = 500 Ω

The channel separation can be
adjusted with an external
capacitor connected between this
pin and ground

Connect the FM oscillator coil

20 FM-OSC 4.5 4.4 between this pin and pin 21

(VCC2)

ILA00323

No.6854-8/10

LA1823

Pin

number

Function voltage (V) Equivalent circuit Remarks

21 VCC2 4.5 4.4 Power is supplied from pin 4

Quiescent

AM FM

R

421

FM-FE block V

CC

(VCC1) via external resistor

ILA00324

22 21

FM-RF 4.5 4.4 Connect the FM-RF coil between

22

output this pin and pin 21 (VCC2)

24 FM-RF input 0 0.9

24

Rin

ILA00325

(10 Ω)

Rin = 1.8 kΩ

23 GND2 0 0 FM-FE block ground

0

--20

--40

FM Characteristics

Signal

AM out

--60

Output -- dBm

VCC=4.5V

--80

fc=98MHz

Noise

fm=1kHz, 22.5kHz dev
AM=30%mod

--100

--20 40200 60 10080 120 140

Ant input -- dBµV EMF

0

VCC=4.5V

AM Characteristics

fc=1000kHz
fm=1kHz, 30%mod

--20

--40

--60

Output -- dBm

Signal

Noise

--80

ILA00326

5

FM Characteristics

VCC=4.5V
fc=98MHz
fm=1kHz

THD -- %

4

3

2

1

THD(75k)

0

--20 40200 60 10080 120 140

THD(22.5k)

Ant input -- dBµV EMF

5

AM Characteristics

VCC=4.5V
fc=1000kHz

4

fm=1kHz, 30%mod

THD30%

3

2

THD -- %

1

VAGC

THD80%

ILA00327

2.5

2.0

1.5

1.0

0.5

VAGC -- V

--100

--20 40200 60 10080 120 140 --20 40200 60 10080 120 140

Ant input -- dB/m

ILA00328

0

Ant input -- dB/m

ILA00329

No.6854-9/10

0

LA1823

Sep -- dB

60

FM st Characteristics

VCC=4.5V
fc=98MHz, Vin=60dBµV EMF

50

75kHz dev, L+R=90%
Pilot=10%

40

Sep R

Sep L

30

20

10

0

fm -- kHz

1000.01 0.1 1.0 10

ILA00330

5

VCC=4.5V
fc=98MHz, Vin=60dBµV EMF
75kHz dev, L+R=90%

4

Pilot=10%

3

2

THD -- %

1

0

FM st Characteristics

Sub

ST

fm -- kHz

Main

Mono

1000.01 0.1 1.0 10

ILA00303

Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer's
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer's products or equipment.

SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.

In the event that any or all SANYO products(including technical data,services) described or
contained herein are controlled under any of applicable local export control laws and regulations,
such products must not be exported without obtaining the export license from the authorities
concerned in accordance with the above law.

No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co. , Ltd.

Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO product that you intend to use.

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 January, 2001. Specifications and information herein are subject to
change without notice.

No.6854-10/10

PS