Datasheet LA1833NM, LA1833N Datasheet (SANYO)

Ordering number : ENN6568

D1500RM (OT) No. 6568-1/10

Overview

The LA1833N/NM is an AM/FM IF and MPX system-on­chip 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

112

24

13

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.

SANYO: DIP24S (300 mil)

[LA1833NM]

21.0

(0.71)

24

1

0.9

1.78

0.48

13

6.4

7.62

12

(3.25)

3.9max

3.3

0.95

0.51min

0.25

No. 6568-2/10

LA1833N, 1833NM

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

CC

max 9V

(LA1833N) 400 mW

Allowable power dissipation Pd max (LA1833NM) (Ta ≤ 45°C) 400 mW

(LA1833NM) (Ta = 70°C) 270 mW
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 V

CC

5V

Operating supply voltage range V

CC

op 4 to 8 V

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 I

CCO

-FM No input 18 28 38 mA

Demodulator output V

O

-FM 100 dBµ, 100% mod. The pin 13 output 210 330 420 mVrms

Channel balance C.B-mono

100 dBµ, 100% mod.

–1.5 0 1.5 dB

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 70 78 dB
AM rejection ratio AMR 100 dBµ, AM = 30% mod. fm = 1 kHz 45 63 dB

Input limiting voltage –3dBL. S

100 dBµ, 100% mod. The pin 13 output

34 42 dBµ

Referenced to the output, when the input is down by –3 dB
SD LED on sensitivity SD-On-FM 32 42 52 dBµ
IF counter buffer output V

IFBuff

-FM 100 dBµ, the pin 10 output 200 275 400 mVrms

Muting attenuation Mute Att 100 dBµ, 100% mod. fm = 1 kHz 76 dB

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

Separation Sep

Left channel modulated,

28 42 dB

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

36 dB

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

41 dB

rejection ratio

with respect to an L – R modulated 1 kHz demodulator output
Carrier leakage CL L + R = 90%, De-emph asis 50 µs, Pilot = 10% 38 44 dB

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

Current drain I

CCO

-AM No input 11 22 33 mA

Detector output V

O

-AM (1) 23 dBµ, 30% modulation. The pin 13 output 40 80 160 mVrms

Detector output V

O

-AM (2) 80 dBµ, 30% modulation. The pin 13 output 90 160 230 mVrms

Signal-to-noise ratio

S/N-AM (1)

23 dBµ, 30% modulation. The pin 13 output 16 21 dB

S/N-AM (2)

80 dBµ, 30% modulation. The pin 13 output 48 54 dB

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

14 24 34 dBµ

Local oscillator buffer output V

OSC

-AM No input, the pin 24 output 140 200 mVrms

IF counter buffer output

V

IFBuff

-AM

80 dBµ, no modulation, the pin 10 output 140 285 400 mVrms

Electrical Characteristics at VCC= 5 V, in the specified test circuit

No. 6568-3/10

LA1833N, 1833NM

Pin Descriptions

Pin No. Pin

Voltage (V)

Functional description Equivalent circuit

1

FM IF input

Vreg

ILA00220

1

3

Continued on next page.

The input impedance, ri, is 330 Ω

2

ILA00221

2

AM MIX output

V

CC

The mixer coil is connected between pins
2 and 9

ILA00222

3

3

REG

2.1

Vreg = 2.1 V

ILA00223

4

4

AM IF input

Vreg

The input impedance, ri, is 2 kΩ

5 GND 0

ILA00224

76

6
7

Tu-LED
ST-LED

Also functions as the
AM stereo IF output

V

CC

These are active-low open-collector
outputs.

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

ILA00225

8

8

FM-DET

V

CC

– 2.1

Recommended ceramic discriminators
FCD1070MA11UK2L (TDK)
CDA10.7MG86N (Murata Mfg. Co., Ltd.)

9

V

CC

5.0

ILA00226

10

10

AM/FM IF counter
output

Also functions as a
control switch

Also functions as the
muting switch

0

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. Pin

Voltage (V)

Functional description Equivalent circuit

11

Phase comparator
filter connection

Also functions as the
FM/AM switching
input

VCC– 1.0

ILA00227

11

Continued on next page.

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

12

ILA00228

12

Pilot detector filter
connection

Also functions as the
forced mono setting

Also functions as the
VCO stop control

V

CC

– 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

13

14

13
14

Left output

Right output

1.8

The output impedance, r

o

, is 3.3 kΩ

ILA00230

15

3

15

Pilot canceller output

Vreg

ILA00231

16

RNF

16

Decoder input

Vreg

Inverting input
RNF = 20 kΩ

ILA00232

17

17

PLL input

Vreg

The input impedance, r

i

, is 20 kΩ

ILA00234

19

100V

19

AM detector output

0 (FM)

1.5 (AM)

The output impedance, r

o

, is 10 kΩ

ILA00233

18

18

FM demodulator output

Vreg

The output impedance, r

o

, is 2.3 kΩ.

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. Pin

Voltage (V)

Functional description Equivalent circuit

20

S meter
Also functions as the

AM AGC

0.2 (FM)

0.9 (AM)

ILA00235

20

R

Internal load resistor R = 13.9 kΩ.
The SD response speed during seek

operations is set by the value of the
external capacitor connected to pin 20.

21

ILA00236

21

AM RF-IN

Vreg

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

ILA00237

22

22

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

23

23 OSC

V

CC

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

CC

voltage).

Note: The oscillator coil impedance

(secondary side) must be at least
5 kΩ.

ILA00239

24

R

24

Oscillator buffer
Also functions as the

FM SD adjustment

V

CC

– 1.4

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

Note: The resistance of the pin 24 external

resistor must be at least 3.3 kΩ.

No. 6568-6/10

LA1833N, 1833NM

Block Diagram

ILA00240

24 23 22 21 20 19

FM-IN

(10.7MHz)

450kHz

+

+

+

+

R L

BUFF

ALC

AGC

AM

IF

AM

DET

AM

MIX

FM

BAND-W

AM

RF. AMP

OSC

BUFF

VT

FM SD

ADJ

OSC

RF

V-SM

AM

OSC

S-CURVE

FM

DET

FM

IF

LEVEL

DET

TUNING

DRIVE

COMP

AM / FM

IF

BUFF

GNDREG

STEREO

SW

FF

38k

VCO

304kHz

P-DET

Ø

PILOT

DET

FF

19k∠0

FF

19k∠

2

π

PILOT

CANCEL

DECODER

ANTI-BIRDIE

V

CC

2 3 4 5 6 7 8 10 11

+

+ +

12

TU-LED ST-LED

AM / FM

IF-BUFF

AM MONO

FM

ST

V

CC

(4.0 to 8.0 V)

SEEK

MUTE

18 17 16 15 14 13

91

AM stereo IF output

No. 6568-7/10

LA1833N, 1833NM

Test Circuit

L OUT

R OUT

0.015µF

0.015µF

0.0047µF

0.1µF

0.01µF

39m

39pF 20pF

4.7µF

0.047µF

0.047µF

10µF

1000pF

65kΩ

20kΩ

20kΩ

0 dB

24 23 22 21 20 19

FM-IN

(10.7MHz)

HW6215

0.047µF

0.047µF

33µF

300Ω

75Ω

+

2 3 5 6 7 8 10

**********

****

11 12

MFP = 33

TU-LED

LA1833N / 1833NM

ST-LED

AM IF

AM / FM

IF-BUFF

AM

0.47µF

1µF

1µF

3kΩ

MONO

FM

V

CC

Top view

5.0 V

18 17 16 15 14 13

91 4

SEEK

NORMAL

20pF

1000pF

1000pF

V-ST

V-SD

100Ω

50kΩ

50kΩ

+

+

+

OSC

BUFF

6.8kΩ

1000pF

HW50425

AM-IN

(1MHz)

+

+

+

22µF

3.3µF

50Ω

5.6kΩ

A

A

LPF

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

0

--10

--20

--40

--30

--60

--50

--70

--80

--90

20

0

--20

--40

--60

--80

--100

10

8

6

4

2

0

12

0 50 100 150

ILA00242

ILA00244

426108

60

55

50

40

45

35

30

25

20

ILA00245

210468

20

0

--20

--40

--60

--80

10

8

6

4

2

0

ILA00246

200 40 14080 100 12060

S

AM

N

3.0

2.5

1.5

2.0

1.0

0.5

0

10.55 10.65 10.75 10.8510.6 10.7 10.8
ILA00243

THD

N

AM

S

Qs

3dB LS

V

O

Noise

AGC

SD - OUT

THD(80%Mod)

THD(30%Mod)

0

--20

--40

--60

--10

--30

--50

--80

--70

1.2

1.0

0.8

0.6

0.4

0.2

0

1.6

1.4

ILA00247

426108

Noise

Vout

THD(80%Mod)

THD(30%Mod)

80

60

40

20

70

50

30

0

10

ILA00248

426108

AGC

SD -- ON

SD - OUT

100

80

60

40

20

0

ILA00249

--40 100--20 0 20 40 60 80

S / N

SD -- ON

--3dB LS

Input — dBµ

Output, — dBV

Total harmonic distortion, THD — %

Frequency — MHz

Demodulator output, V

O

— dBm

Supply voltage, VCC— V

Supply voltage, V

CC

— V

SD on range, Qs — dBµ

3 dB limiting sensitivity, Qs — dBµ

Supply voltage, VCC— V

Input — dBµ

Output, — dBµ

Output, — dBV

Useable sensitivity, Qs — dBµ

SD sensitivity, SD — dBµ

Supply voltage, VCC— 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

CC

Characteristics

FM IF V

CC

Characteristics

AM Characteristics

AM V

CC

Characteristics

AM V

CC

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

0

ILA00250

--40 100--20 0 20 40 60 80

60

50

40

30

20

10

0

ILA00252

--40 100--20 0 20 40 60 80

10

1.0

0.1

THD — fm

ILA00254

10000010 100 1000 10000

10

1.0

0.1

2

3

5

7

2

3

5

7

THD — V

CC

ILA00256

0123456789

50

40

30

20

10

0

Sep — fm

ILA00255

10000010 100 1000 10000

3.0

2.5

2.0

1.5

1.0

0.5

0

ILA00253

--40 100--20 0 20 40 60 80

100dBµ

50dBµ

0dBµ

70

60

50

40

30

20

10

0

3.0

2.5

2.0

1.5

1.0

0.5

0

3.5

ILA00251

0--20--40 20 10040 60 80

100

80

60

40

20

0

Sep, S / N — V

CC

ILA00257

210468

THD

Sep

Pilot ON

SD -- ON

23dBµ

80dBµ

20dBµ

80dBµ

0dBµ

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

SM

— V

Channel separation, Sep — dB

Ambient temperature, Ta — °C

Signal-to-noise ratio, S/N — dB

SD on level — dBµ

Ambient temperature, Ta — °C

Ambient temperature, Ta — °C

AGC voltage, V

AGC

— V

Modulation frequency, fm — kHzModulation frequency, fm — kHz

Channel separation, Sep — dB

Total harmonic distortion, THD — %

Supply voltage, VCC— V

Supply voltage, V

CC

— V

Channel separation, Sep — dB

Signal-to-noise ratio, S/N — dB

FM IF Temperature Characteristics

FM ST VCCCharacteristics

AM Temperature 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.

Supply voltage, VCC— V

Stereo sensitivity, V

L

— %

Pilot input voltage — mV

Capture range, CR — %

Capture Range Characteristics

3.0

2.5

2.0

1.5

1.0

0.5

0

210468

VL on, off — V

VL off

CC

VL on

8

6

4

2

0

--2

--4

--6

--8

ILA00258 ILA00259

10 15 20 25 30 35

CR+

CR--