Datasheet LA1824 Datasheet (SANYO)

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

Sample Application Circuit Diagram

2.2kΩ
FM-DET

LA1824

=4.5V

CC

V

+

22µF

+

+

+

0.47µF

MN ST

0.1µF 3.3µF
AM FM

3.3kΩ

1kΩ1kΩ

L-OUT

R-OUT

6800pF 6800pF

1800pF

+

4.7µF

100Ω

LA1824

FM STAM / FM

SD

450kHz

AM-IFT

47000pF 47000pF

10Ω 10Ω

FM antenna

10.7MHz

20 19 17

FM-IFT

22pF

18pF 8pF

FM RF FM OSC

1000pF

24 23 22 21 18 16 15 14 13

B.P.F

390pF

AM-OSC

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

AM antenna

8pF

0.047µF

+

100µF

0.047µF10µF

+

ILA00377

No.6855-4/10

LA1824

ACFA-450L08

GND

2

ILA00383

3

1
S

S
4

6

V

CC

pin7

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-MIX : SA-165 (Sumida) : A119ACS-19458X (Toko)

S

V

3

CC

2

1

pin5

• FM-DET : SA-1134 (Sumida) : A119ACS-19459Z (Toko)

S

CF

4

6

GND

ILA00378

4-6 2 T 3-1 10 T
3-1 12 T 4-6 2 T

0.12UEW 0.1-2UEW
fo = 10.7 MHz fo = 10.7 MHz
Qo ≥ 50 Qo ≥ 60

V

pin5

CC

3

2

1
S

100 pF internal 100 pF internal

S

CF

4

6

GND

ILA00382

3

pin13

2

1

V

CC

S

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

S

PVC

3

2

1

GND

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

S
3

V

2

CC

1

pin7

• FM-IF filter : SFE10.7MS2 (Murata)

• AM-IF filter : SFU450B (Murata)

• Poly-varicon : FT-2217 (Toko)

• MW Bar-antenna : C8E-A0105 (Toko)

4

6

ILA00379

pin3

4

6

V

CC

S

ILA00380

S

CF

4

6

GND

ILA00381

1-3 12 T 1-3 11 T

0.10UEW 0.1-2UEW
fo = 10.7 MHz fo = 10.7 MHz
Qo ≥ 70 Qo ≥ 70
82 pF internal 82 pF internal

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

pin13

V

CC

PVC

GND

3

2

1
S

S
3

2

1

4

6

ILA00379

pin3

4

6

V

CC

S

ILA00380

1-2 67 T
3-4 9 T

SS

1

2

3

4

pin1GNDPVC pin2

ILA00384

fo = 796 kHz
Qu = 180 min
L = 260µH

No.6855-5/10

LA1824

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 1.3 1.3

1

ILA00307

2

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

2 Reg 1.3 1.3

ILA00308

3 4

Connect the AM oscillator coil

3 AM-OSC 4.5 4.5 between this pin and pin 4

(VCC1)

ILA00309

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

4

5

CC

Connect the FM mixer coil

5 FM-MIX output 4.5 4.5 between this pin and pin 4

(VCC1)

ILA00385

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

7

4

Connect the AM mixer coil

7 AM-MIX output 4.5 4.5 between this pin and pin 4

(VCC1)

ILA00386

No.6855-6/10

LA1824

Pin

number

Function voltage (V) Equivalent circuit Remarks

Quiescent

AM FM

8

Active-low

8 Tuning indicator 4.5 4.5

Open-collector output can directly
drive LED (IC max = 20 mA)

ILA00387

9

Stereo

9 indicator and 4.5 4.5

Active-low

Open-collector output can directly
drive LED (IC max = 20 mA)

AM IF output

AM-IF signal is output in

ILA00388

10

10 FM-IF input 1.3 1.3 Rin = 330 Ω

2

Rin

ILA00314

AM mode

11

11 AM-IF input 1.3 1.3 Rin = 2 kΩ

2

Rin

ILA00315

AM-AGC
output and

12

FM signal R = 16.6 kΩ

0.7 0.2

12

R

Internal load resistance

meter output

ILA00316

13

Connect the FM detector coil

13 FM-DET 4.5 4.5 between this pin and pin 4

(VCC1)

ILA00317

No.6855-7/10

LA1824

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

1.4 1.4 Rout = 7.5 kΩ

Rout

16

17

( )

ILA00320

18 MPX input 1.3 1.3 Rin = 50 kΩ

18

Rin

ILA00321

Output impedance
AM : Rout = 50 kΩ

AM/FM

19 detector 0.5 1.5

output

Rout(FM)

19

Rout(AM)

ILA00322

FM : Rout = 500 Ω

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

21 20

Connect the FM oscillator coil

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

(VCC2)

ILA00323

No.6855-8/10

LA1824

Pin

number

Function voltage (V) Equivalent circuit Remarks

21 VCC2 4.5 4.4

Quiescent

AM FM

R

421

FM-FE block V

Power is supplied pin 4 (VCC1)

22 FM-RF output 4.5 4.4

24 FM-RF input 0 1.0

ILA00324

22 21

24

Rin

ILA00325

via external resistor (10 Ω)

Connect the FM-RF coil between
this pin and pin 21 (VCC2)

Rin = 500 Ω

23 GND2 0 0 FM-FE block ground

CC

0

--20

--40

FM Characteristics

Signal

AM out

--60

Output -- dBm

--80

VCC=4.5V
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

--80

Signal

Noise

ILA00390

5

FM Characteristics

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

THD -- %

4

3

2

THD(75k)

1

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 -- %

VAGC

1

THD80%

ILA00391

2.5

2.0

1.5

1.0

0.5

VAGC -- V

--100
0604020 80 120100 140 0 604020 80 120100 140

Ant input -- dB/m

ILA00392

0

Ant input -- dB/m

No.6855-9/10

0

ILA00393

LA1824

10

VCC=4.5V

7

fc=98MHz, VIN=60dBµV EMF

5

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

3
2

FM st Characteristics

Sub

1.0

THD -- %

7
5

3
2

0.1

Mono

Main

23 57 23 57 23 57 23 57

0.1 1.0 10

ST

fm -- kHz

ILA00394

60

50

FM st Characteristics

Sep R

40

30

Sep L

Sep -- dB

20

10

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

0

1000.01

23 57 23 57 23 57 23 57

Pilot=10%

fm -- kHz

1000.01 0.1 1.0 10

ILA00389

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.6855-10/10

PS