Ordering number : ENN6568

D1500RM (OT) No. 6568-1/10

Overview

The LA1833N/NM is an AM/FM IF and MPX system-on-
chip IC that supports electronic tuning for home stereo
systems. It is optimal for use in auto-seek systems that use
SD (station detect) and IF counting in parallel.

Functions

· AM: RF amplifier, mixer, oscillator, IF amplifier,

detector, AGC, SD, oscillator buffer, IF buffer, and
stereo IF output

· FM IF: IF amplifier, quadrature detector, S meter, SD,

S-curve detector, IF buffer

· MPX: PLL stereo decoder, stereo indicator, forced

mono, VCO stop, audio muting, adjacent channel
interference reduction function, pilot canceller

Features

· Improvements over the LA1832

-- The MPX VCO circuit has been integrated on the

same IC (no ceramic element required)

-- Built-in adjacent channel interference reduction

function (114 kHz, 190 kHz)

-- Built-in pilot canceler function (19 kHz)
-- AM and FM output levels can be set independently
-- Improved FM reception characteristics (IF beating

improved)

· Other features

-- Pin arrangement nearly identical to that of the

LA1832

-- AM coil specifications can be the same as those used

for the LA1832.

-- ST operating dynamic range improved over that of

the LA1833

-- FM total harmonic distortion detuning

characteristics and signal-to-noise ratio improved
over those of the LA1833

Package Dimensions

unit: mm

3112A-MFP24S

unit: mm

3067A-DIP24S

12.5

(0.75)

1.0

0.15

0.35

5.4

7.6

0.63

1.7max

1.5

0.1

SANYO: MFP24S (300 mil)

[LA1833N]

LA1833N, 1833NM

SANYO Electric Co.,Ltd. Semiconductor Company

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

System-on-Chip Tuner IC for Home Stereo Systems

Monolithic Linear IC

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.

0.48

(3.25)

3.3

3.9max

0.51min

21.0

(0.71)

1.78

0.25

7.62

6.4

0.95

0.9

SANYO: DIP24S (300 mil)

[LA1833NM]

No. 6568-2/10

LA1833N, 1833NM

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

max

(LA1833N)

400

Allowable power dissipation

Pd max

(LA1833NM) (Ta

45°C)

400

(LA1833NM) (Ta = 70°C)

270

Operating temperature

Topr

20 to +70

°C

Storage temperature

Tstg

40 to +125

°C

Specifications

Maximum Ratings

at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

Recommended supply voltage

Operating supply voltage range

4 to 8

Operating Conditions

at Ta = 25°C

Parameter

Symbol

Conditions

Ratings

Unit

min

typ

max

[FM Mono Characteristics: fc = 10.7 MHz, fm = 1 kHz]

Current drain

CCO

-FM

No input

Demodulator output

-FM

100 dBµ, 100% mod. The pin 13 output

210

330

420

mVrms

Channel balance

C.B-mono

100 dBµ, 100% mod.

1.5

The ratio (pin 13 output)/(pin 14 output)

Total harmonic distortion (mono)

THD-FM

100 dBµ, 100% mod. The pin 13 output

0.5

1.5

Signal-to-noise ratio

S/N-FM

100 dBµ, 100% mod. The pin 13 output

AM rejection ratio

AMR

100 dBµ, AM = 30% mod. fm = 1 kHz

Input limiting voltage

3dBL. S

100 dBµ, 100% mod. The pin 13 output

dBµ

Referenced to the output, when the input is down by 3 dB

SD LED on sensitivity

SD-On-FM

dBµ

IF counter buffer output

IFBuff

-FM 100 dBµ, the pin 10 output

200

275

400

mVrms

Muting attenuation

Mute Att

100 dBµ, 100% mod. fm = 1 kHz

[Stereo Characteristics: fc = 10.7 MHz, 100 dBµ, fm = 1 kHz, L + R = 90%, pilot = 10%]

Separation

Sep

Left channel modulated,

the ratio (pin 13 output)/(pin 14 output)

Stereo on level

ST-on

The pilot modulation level such that V7 becomes

1.5

3.5

5.5

less than 0.7 V

Total harmonic distortion (main)

THD-main L + R modulation, the pin 13 output

0.7

1.5

Adjacent channel interference

Brej-3rd

fs = 113 kHz, Vs = 90%, Pilot = 10%; the pin 13 output

rejection ratio

with respect to an L R modulated 1 kHz demodulator output

Adjacent channel interference

Brej-5th

fs = 189 kHz, Vs = 90%, Pilot = 10%; the pin 13 output

rejection ratio

with respect to an L R modulated 1 kHz demodulator output

Carrier leakage

L + R = 90%, De-emph asis 50 µs, Pilot = 10%

[AM Characteristics: fc = 1000 kHz, fm = 1 kHz]

Current drain

CCO

-AM

No input

Detector output

-AM (1) 23 dBµ, 30% modulation. The pin 13 output

160

mVrms

Detector output

-AM (2) 80 dBµ, 30% modulation. The pin 13 output

160

230

mVrms

Signal-to-noise ratio

S/N-AM (1) 23 dBµ, 30% modulation. The pin 13 output

S/N-AM (2) 80 dBµ, 30% modulation. The pin 13 output

Total harmonic distortion

THD-AM (1) 80 dBµ, 30% modulation. The pin 13 output

0.4

1.1

THD-AM (2) 100 dBµ, 30% modulation. The pin 13 output

0.5

1.3

SD LED on sensitivity

SD-On-AM

dBµ

Local oscillator buffer output

OSC

-AM No input, the pin 24 output

140

200

mVrms

IF counter buffer output

IFBuff

-AM 80 dBµ, no modulation, the pin 10 output

140

285

400

mVrms

Electrical Characteristics

at V

= 5 V, in the specified test circuit

No. 6568-3/10

LA1833N, 1833NM

Pin Descriptions

Pin No.

Voltage (V)

Functional description

Equivalent circuit

FM IF input

Vreg

ILA00220

Continued on next page.

The input impedance, r

, is 330

ILA00221

AM MIX output

The mixer coil is connected between pins
2 and 9

ILA00222

REG

2.1

Vreg = 2.1 V

ILA00223

AM IF input

Vreg

The input impedance, ri, is 2 k

GND

ILA00224

Tu-LED

ST-LED

Also functions as the
AM stereo IF output

These are active-low open-collector
outputs.

Set up the current flowing in to these pins
to exceed 100 µA.

ILA00225

FM-DET

2.1

Recommended ceramic discriminators

FCD1070MA11UK2L (TDK)

CDA10.7MG86N (Murata Mfg. Co., Ltd.)

5.0

ILA00226

AM/FM IF counter
output

Also functions as a
control switch

Also functions as the
muting switch

V10

0.5 V: Reception state (normal)

1.4 V

V10

2.2 V: Muting on state.

V10

3.5 V: Muting on and IF counter on

(seek state).

No. 6568-4/10

LA1833N, 1833NM

Continued from preceding page.

Pin No.

Voltage (V)

Functional description

Equivalent circuit

Phase comparator
filter connection

Also functions as the
FM/AM switching
input

1.0

ILA00227

Continued on next page.

The IC switches to AM mode if a current in
excess of 200 µA flows from this pin

ILA00228

Pilot detector filter
connection

Also functions as the
forced mono setting

Also functions as the
VCO stop control

1.0

The IC switches to forced mono mode if a
current in excess of 50 µA flows from this
pin.

The VCO circuit is stopped if a current in
excess of 200 µA flows from this pin.

(

)

ILA00229

Left output

Right output

1.8

The output impedance, r

, is 3.3 k

ILA00230

Pilot canceller output

Vreg

ILA00231

RNF

Decoder input

Vreg

Inverting input

RNF = 20 k

ILA00232

PLL input

Vreg

The input impedance, r

, is 20 k

ILA00234

100V

AM detector output

0 (FM)

1.5 (AM)

The output impedance, r

, is 10 k

ILA00233

FM demodulator output

Vreg

The output impedance, r

, is 2.3 k

The separation can be adjusted by
changing the value of the capacitor
connected between this pin and ground.

No. 6568-5/10

LA1833N, 1833NM

Continued from preceding page.

Pin No.

Voltage (V)

Functional description

Equivalent circuit

S meter

Also functions as the
AM AGC

0.2 (FM)

0.9 (AM)

ILA00235

Internal load resistor R = 13.9 k

The SD response speed during seek
operations is set by the value of the
external capacitor connected to pin 20.

ILA00236

AM RF-IN

Vreg

Pin 21 and pin 22 (the AFC voltage) are
used at the same potential

ILA00237

AFC

Vreg

The FM SD bandwidth can be adjusted by
an external resistor connected between
pin 22 and pin 3 (the regulator voltage).

Note: A bandwidth of 180 kHz or higher is

appropriate for the FM SD bandwidth.

ILA00238

OSC

The oscillator coil is connected between
pin 23 and pin 9 (the V

voltage).

Note: The oscillator coil impedance

(secondary side) must be at least
5 k

ILA00239

Oscillator buffer

Also functions as the
FM SD adjustment

1.4

The FM SD sensitivity can be adjusted
with an external resistor on pin 24.
R = 200

Note: The resistance of the pin 24 external

resistor must be at least 3.3 k

No. 6568-7/10

LA1833N, 1833NM

Test Circuit

ILA00241

L OUT

R OUT

0.015

0.0047

0.1

0.01

39m

39pF

20pF

4.7

0.047

1000pF

65k

20k

0 dB

FM-IN

(10.7MHz)

HW6215

0.047

300

MFP = 33

TU-LED

LA1833N / 1833NM

ST-LED

AM IF

AM / FM

IF-BUFF

0.47

MONO

Top view

5.0 V

SEEK

NORMAL

20pF

1000pF

V-ST

V-SD

100

50k

OSC

UFF

6.8k

1000pF

HW50425

AM-IN

(1MHz)

3.3

5.6k

LPF

CDA10.7MG1-B

(For the DUT socket

printed circuit board)

The places that differ with the LA1833 are (1) the value of the pin 8 resistor and (2) the circuits in the vicinity of pins 17

and 18.

: Pins with the same functionality as those on the LA1832.

No. 6568-8/10

LA1833N, 1833NM

--10

--20

--40

--30

--60

--50

--70

--80

--90

--20

--40

--60

--80

--100

100

150

ILA00242

ILA00244

ILA00245

--20

--40

--60

--80

ILA00246

140

100

120

3.0

2.5

1.5

2.0

1.0

0.5

10.55

10.65

10.75

10.85

10.6

10.7

10.8

ILA00243

THD

3dB LS

Noise

AGC

SD - OUT

THD(80%Mod)

THD(30%Mod)

--20

--40

--60

--10

--30

--50

--80

--70

1.2

1.0

0.8

0.6

0.4

0.2

1.6

1.4

ILA00247

Noise

Vout

THD(80%Mod)

THD(30%Mod)

ILA00248

AGC

SD -- ON

SD - OUT

100

ILA00249

--40

100

--20

S / N

SD -- ON

--3dB LS

Input -- dBµ

Output, -- dBV

Total harmonic distortion, THD -- %

Frequency -- MHz

Demodulator output, V

-- dBm

Supply voltage, V

-- V

Supply voltage, V

-- V

SD on range, Qs -- dBµ

3 dB limiting sensitivity, Qs -- dBµ

Supply voltage, V

-- V

Input -- dBµ

Output, -- dBµ

Output, -- dBV

Useable sensitivity, Qs -- dBµ

SD sensitivity, SD -- dBµ

Supply voltage, V

-- V

Ambient temperature, Ta -- °C

3 dB limiting sensitivity, 3dBLS -- dB

Signal-to-noise ratio, SD on, 3dBLS -- dB

FM IF I/O Characteristics

FM IF THD Detuning Characteristics

FM IF V

Characteristics

FM IF V

Characteristics

AM Characteristics

AM V

Characteristics

AM V

Characteristics

FM IF Temperature Characteristics

SD on range

Useable sensitivity

Total harmonic distortion, THD -- %

SD, AGC -- V

Total harmonic distortion, THD -- %

No. 6568-9/10

LA1833N, 1833NM

3.0

2.5

2.0

1.5

1.0

0.5

ILA00250

--40

100

--20

ILA00252

--40

100

--20

1.0

0.1

THD -- fm

ILA00254

100000

100

1000

10000

1.0

0.1

THD -- V

ILA00256

Sep -- fm

ILA00255

100000

100

1000

10000

3.0

2.5

2.0

1.5

1.0

0.5

ILA00253

--40

100

--20

100dB

50dB

0dB

3.0

2.5

2.0

1.5

1.0

0.5

3.5

ILA00251

--20

--40

100

Sep, S / N -- V

ILA00257

THD

Sep

Pilot ON

SD -

- ON

23dB

80dB

20dB

80dB

0dB

THD main

THD sub

THD st

Sep L

Sep R

THD sub

THD main

THD mono

THD st

Sep L

Sep R

S / N

Ambient temperature, Ta -- °C

S-meter voltage, V

-- V

Channel separation, Sep -- dB

Ambient temperature, Ta -- °C

Signal-to-noise ratio, S/N -- dB

SD on level -- dBµ

Ambient temperature, Ta -- °C

AGC voltage, V

AGC

-- V

Modulation frequency, fm -- kHz

Channel separation, Sep -- dB

Total harmonic distortion, THD -- %

Supply voltage, V

-- V

Supply voltage, V

-- V

Channel separation, Sep -- dB

Signal-to-noise ratio, S/N -- dB

FM IF Temperature Characteristics

FM ST V

Characteristics

AM Temperature Characteristics

Total harmonic distortion, THD, pilot on -- %

Total harmonic distortion, THD -- %

PS No. 6568-10/10

LA1833N, 1833NM

This catalog provides information as of December, 2000. Specifications and information herein are
subject to change without notice.

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.

--2

--4

--6

--8

3.0

2.5

2.0

1.5

1.0

0.5

on, off -- V

ILA00258

ILA00259

off

CR+

CR--

Supply voltage, V

-- V

Stereo sensitivity, V

-- %

Pilot input voltage -- mV

Capture range, CR -- %

Capture Range Characteristics

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: LA1833NM

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: LA1833NM