SANYO LA7583 Datasheet

Ordering number: EN5177

Monolithic Linear IC

LA7583

Overview

The LA7583 is a VIF + SIF IC that requires no adjustments. In order to eliminate the need for adjustments in the VIF block, a multi-network PLL has been developed and adopted for video detection. In the SIF block, adjustments were eliminated by using gyrator technology in the FM quadrature detector. In addition to eliminating the need for adjustments, a buzz canceller that suppresses Nyquist buzz has been built into the LA7583 in order to provide excellent sound quality.

Features

Elimination of VCO, AFT, and SIF coils eliminates the need for adjustments.

A variety of built-in filters.

Built-in buzz canceller results in excellent audio characteristics.

Note: A

C Automatic Adjustment Control

AQT Automatic Quadrature Tuning

C PLL VIF + SIF) for TVs and VCRs

Package Dimensions

unit : mm

3067-DIP24S

[LA7583]

SANYO : DIP24S

IF Signal Processing Circuit

Functions

[VIF]

VIF amplifier

Equalizer amplifier

AGC lag lead filter

[1st SIF]

Preamplifier

[SIF]

Limiter amplifier

[mute]

Audio mute

Multinetwork PLL

AFT

Video driver

1st SIF detector

AQT detector (gyrator)

AV mute

BNC

IFAGC

AGC detector

J/U switch

FAGC

Buzz canceller

Built-in AGC filter

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83095HA(II) No.5177-1/15

LA7583

Specifications

Maximum Ratings atTa=25°C

Parameter Symbol Conditions Ratings Unit

17V

Maximum supply voltage

Circuit voltage

Circuit current I1, I10, I23 –1 mA

Allowable power dissipation Pd max T Operating temperature Topr –20 to +70 Storage temperature Tstg –55 to +150

*A2C (Automatic Adjustment Control) Note: Current flowing into the IC is positive (no signal) and current flowing out is negative.

Pin Assignment

2 13.2 V

V4 V

V3, V11 V

I3, I21 –3 mA

I15, I19 –5 mA

% 50°C 1000 mW

Top View

Pd max — Ta

Allowable power dissipation, Pd max − mW

Ambient temperature, Ta −°C

No.5177-2/15

LA7583

Operating Conditions atTa=25°C

Parameter Symbol Conditions Ratings Unit

15V

Recommended supply voltage

Operating supply voltage range

Electrical Characteristics atTa=25°C, VCC1=5V,VCC2 = 9 V, fp = 45.75 MHz

Parameter Symbol Conditions min typ max Unit [VIF Block] Circuit current 1 I20 V Circuit current 2 I8 V Maxinum RF AGC voltage V3H V4=3V 7.5 8.1 9 V Mininum RF AGC voltage V3L V4 = 1.5 V 0 +0.5 V Input sensitivity Vi S1 = OFF 32 38 44 dBµ AGC range G Maxinum Allowable Input Vi max 95 103 dBµ Video output voltage

with no signal Sync signal tip voltage V19(tip) Vi = 10 mV 1.1 1.4 1.7 V Video output amplitude V Black noise threshold level

voltage Black noise clamp voltage V

Output S/N S/N 48 52 dB 920 kHz beat level I920 P = 0, C = –10 dB, S = –10 dB 41 45 dB Frequency characteristics f Differential gain DG Vi = 10 mV, 87.5% 3 8 % Differential phase DP 10STAR STEP 3 8 rad AFT output voltage

with no signal Maxinum AFT output voltage V11H 7.5 8.5 9 V Mininum AFT output voltage V11L 0 +1 +1.5 V AFT detection sensitivity Sf 33 48 69 VIF input resistance Ri(VIF) f = 45.75 MHz 0.8 1.1 1.5 kΩ VIF input capacity Ci(VIF) f = 45.75 MHz 2 3 5 pF APC pull-in range (U) f APC pull-in range (L) f AFT crossover frequency ∆f

VCO1 maximum variable range

VCO2 maximum variable range VCO1 control sensitivity β1 V22 = 2.8 V to 3.2 V 2.4 4.8 9.6

VCO2 control sensitivity β2 V16 = 2.8 V to 3.2 V 0.3 0.6 1.2 [1st SIF Block]

4.5 MHz output gain VG Vi=1mV,41.25 MHz 23 26 29 dB

4.5 MHz output level SO Vi = 10 mV, 41.25 MHz 50 85 120 mVrms 1st SIF maximum input level Si (max) So + 12 dB–1dB 60 70 mVrms 1st SIF input resistance Ri (SIF1) f = 41.25 MHz 1.2 2 kΩ 1st SIF input capacity Ci (SIF1) f = 41.25 MHz 3 6 pF

V19 V4=2V 3.3 3.6 3.9 V

(V) 87.5% mod 1.7 2.0 2.3 Vp-p

BTH

BCL

V11 0.3 4.5 8.7 V

∆f

1 V22=4V 2.0 5.0 MHz

∆f

1 V22=2V –5.0 –2.0 MHz

∆f

2 V16=4V 100 200 kHz

∆f

2 V16=2V –1000 –200 kHz

29V

1 4.6 to 6 V

2 7 to 12 V

= 5 V 57 66 78 mA

= 9 V 7.8 11.0 14.0 mA

56 62 dB

0.4 0.7 1.1 V

1.65 1.95 2.25 V

P = 0, S = –14 dB 6 8 MHz

mV/kHz

1.0 3 MHz –4.5 –1.0 MHz

–65 +65 kHz

kHz/mV kHz/mV

Continued next page.

No.5177-3/15

LA7583

Continued from preceding page.

Parameter Symbol Conditions min typ max Unit [SIF Block] SIF limiting sensitivity Vi (lim) ∆f = 25 kHz, 400 Hz 47 53 59 dBµ FM detection output voltage V AMR AMR AM = 30%, 400 Hz 40 56 dB Total harmonic distortion THD ∆f = 25 kHz, 400 Hz 0.4 1.5 % SIF S/N S/N(SIF) ∆f = 25 kHz, 400 Hz 55 59 dB [Mute defeat] FM mute V24T 0.5 1.0 V AFT defeat voltage VD11 3.9 4.5 5.1 V J/U SW start voltage VJU24 1.5 2.0 2.5 V AV mute voltage VM23 1 1.5 V

Vi = 100 mV, ∆f = 25 kHz, 400 Hz 300 400 520 mVrms

No.5177-4/15

Equivalent Circuit Block Diagram

LA7583

Multinetwork PLL (Automatic Adjustment Control)

The LA7583’s PIF detector uses a multinetwork PLL and a buzz canceller. The multinetwork PLL is a PLL detector that was developed in order to eliminate the need for adjustments in video detection.

This PLL detector offers the following features:

(1) Eliminates the need for adjustments in video detection. (2) The PLL detection characteristics are unaltered.

a. Offers better waveform response characteristics in comparison with the quasi-synchronous detection method. b. The harmonic wave component of the video signal (demodulated output) is reduced. c. The 1/2 IF signal suppression ratio is improved.

(3) Audio buzz is greatly reduced by the buzz canceller.

A typical PLL detector consists of the blocks shown below.

In these blocks, if the VCO coil is not adjusted to the IF frequency, a phase difference will appear in the control loop. As a result, the PLL detector detection axis will shift from the ideal 180°. The group delay, DP characteristics, etc., deteriorate as a result.

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