SANYO LA1833NM, LA1833N Datasheet

Ordering number : ENN6568

Monolithic Linear IC

LA1833N, 1833NM

System-on-Chip Tuner IC for Home Stereo Systems

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

[LA1833N]

24

13

5.4

7.6

1	12.5	12	1.7max	0.15	0.63
			1.5
		1.0	0.1
	0.35		(0.75)

SANYO: MFP24S (300 mil)

unit: mm

3067A-DIP24S
			[LA1833NM]
		21.0
	24		13
			7.62	6.4	0.25
	1		12
	0.9
			(3.25)	3.9max
(0.71)	1.78	0.48	0.51min	3.3
			0.95
			SANYO: DIP24S (300 mil)

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 Electric Co.,Ltd. Semiconductor Company

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

D1500RM (OT) No. 6568-1/10

LA1833N, 1833NM

Specifications

Maximum Ratings at Ta = 25°C

Parameter	Symbol	Conditions	Ratings	Unit
Maximum supply voltage	VCC max		9	V
		(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

Operating Conditions at Ta = 25°C

Parameter	Symbol	Conditions	Ratings	Unit
Recommended supply voltage	VCC		5	V
Operating supply voltage range	VCC op		4 to 8	V

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

	Parameter	Symbol	Conditions		Ratings		Unit
				min	typ	max
	[FM Mono Characteristics: fc = 10.7 MHz, fm = 1 kHz]
	Current drain	ICCO-FM	No input	18	28	38	mA
	Demodulator output	VO-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	VIFBuff-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	ICCO-AM	No input	11	22	33	mA
	Detector output	VO-AM (1)	23 dBµ, 30% modulation. The pin 13 output	40	80	160	mVrms
	Detector output	VO-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	VOSC-AM	No input, the pin 24 output	140	200		mVrms
	IF counter buffer output	VIFBuff-AM	80 dBµ, no modulation, the pin 10 output	140	285	400	mVrms

No. 6568-2/10

LA1833N, 1833NM

Pin Descriptions
Pin No.	Pin	Voltage (V)	Functional description	Equivalent circuit
				1
1	FM IF input	Vreg	The input impedance, ri, is 330 Ω
				3

ILA00220

2

2

AM MIX output

VCC

The mixer coil is connected between pins

2 and 9

ILA00221

2.1

3

3

REG

Vreg = 2.1 V

ILA00222

4

4

AM IF input

Vreg

The input impedance, ri, is 2 kΩ

ILA00223

5

GND

0

6

7

6

Tu-LED

These are active-low open-collector

ST-LED

VCC

outputs.

7

Also functions as the

Set up the current flowing in to these pins

AM stereo IF output

to exceed 100 µA.

ILA00224

8

FM-DET

VCC – 2.1

Recommended ceramic discriminators

FCD1070MA11UK2L (TDK)

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

8

ILA00225

9

VCC

5.0

AM/FM IF counter

output

V10 ≤ 0.5 V: Reception state (normal)

10

Also functions as a

0

1.4 V ≤ V10 ≤ 2.2 V: Muting on state.

10

control switch

V10 ≥ 3.5 V: Muting on and IF counter on

Also functions as the

(seek state).

muting switch

ILA00226

Continued on next page.

No. 6568-3/10