Sanyo LA7172M Specifications

Ordering number:ENN*5571

Monolithic Linear IC

LA7172M

UHF Band RF Modulator

Preliminary

Overview

The LA7172M is a monolithic IC for an RF modulator which generates RF TV channel signal in UHF band, from a baseband video and audio signal.

Audio FM carrier is controlled by PLL system and gener-

ated without L/C tank.

Features

•5V operation.

•Less supply current.

•Balanced RF VCO.

•Wide bandwidth.

•PLL controlled and tankless audio FM (4 sound intercarrier frequency capability).

•Small package.

•Package : MFP16.

Package Dimensions

unit:mm
3035A-MFP16
	[LA7172M]
16		9
				4.4		5.15	6.4
1	10.1	8			0.15	0.625
				1.8max
			1.5
	0.35	1.27	0.1
			0.605
				SANYO : MFP16

Functions

• RF VCO.

• Video modulator.

• Sound carrier converter.

• RF buffer.

• Video clamp.

• White clip.

• Audio FM.

• 4V regulator.

• Reference oscillatior.

• TSG (test signal generator).

Specifications

Maximum Ratings at Ta = 25˚C

Parameter	Symbol	Conditions	Ratings	Unit
Maximum supply voltage	VCC max		7	V
Allowable power dissipation	Pd max	Ta≤75˚C	250	mW
Operating temperature	Topr		–20 to +75	˚C
Storage temperature	Tstg		–55 to +150	˚C

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

42000TN (KT)/73196RM No.5571–1/3

LA7172

Operating Conditions at Ta = 25˚C

Parameter	Symbol	Conditions	Ratings	Unit
Recommended supply voltage	VCC		5	V
Operating voltage	VCC op		4.5 to 5.5	V

Operating Characteristics at Ta = 25˚C, VCC=5V

Parameter	Symbol	Conditions		Ratings		Unit
			min	typ	max
Supply current	ICC	No signal	24	30	36	mA
Regulator voltage	Vreg	No signal	3.7	3.9	4.1	V
RF output	P	No signal	77	79.5	82	dBµ
P/S ratio	P/S	S : fp+2× 4.5MHz	12.5	15	17.5	dB
Sound 2nd harmonics	P/S2	S2 : fp+2× fs MHz	*	*		dB
Sound 3rd harmonics	P/S3	S3 : fp+3× fs MHz	*	*		dB
Chrominance beat	P/CB	VIN5=fsc, 0.4Vp-p CB : fp+fs–fsc	65	75		dB
Video harmonics	P/V2	VIN5=1MHz, 1Vp-p V2 : fp+2MHz	50	62		dB
Video modulation	Mp	VIN5=Stair step, 1Vp-p	73	80	87	%
White clip level	WCL	VIN5=Stair step, 1.5Vp-p	88	93	98	%
Differential gain	DG	VIN5=Stair step, 1Vp-p	–5		5	%
Differential phase	DP	VIN5=Stair step, 1Vp-p	–6		6	Deg
TSG modulation	Mp TSG	V7 : high	70	80	90	%
TSG VS ratio	V/S	V7 : high, video/sync.	6.3/3.7	6.8/3.2	7.3/2.7
TSG period	TS	V7 : high	63.7	64.0	64.3	µs
TSG sync. width	HS	V7 : high	3.6	4.0	4.4	µs
TSG white width	HV	V7 : high	3.6	4.0	4.4	µs
TSG 1st white rise	TV1	V7 : high, width between sync. and 1st white rise	22	24	26	µs
TSG 2nd white rise	TV2	V7 : high, width between sync. and 2nd white rise	38	40	42	µs
Audio FM modulation	MsFM	VIN3=1kHz, 1.66Vp-p ±50kHzDEV : 100%	90	100	110	%
Max audio modulation	Msmx	THD<3%	400			%
Audio FM THD	THD FM	VIN3=1kHz, 1Vp-p		0.5	2	%
Audio FM S/N	S/N FM	VIN3=1kHz, 1Vp-p, VIN5=color bar, 1Vp-p	43	55		dB

* : TBD

Note

fp : picture RF carrier, fs : sound intercarrier (B/G 5.5MHz), fsc : sub carrier (4.43MHz)

Equivalent Circuit Block Diagram

No.5571–2/3