SANYO LA1833NM, LA1833N Datasheet

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

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)

0.9

1.78

0.48

6.4

7.62

(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

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

Operating supply voltage range V

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

-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

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

Detector output V

-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

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

FM IF input

Vreg

ILA00220

Continued on next page.

The input impedance, ri, is 330 Ω

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 kΩ

5 GND 0

ILA00224

6 7

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).

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