LA76810A 查看數據表（PDF） - SANYO -> Panasonic

零件编号

产品描述 (功能)

生产厂家

LA76810A

Monolithic Linear IC / For PAL/NTSC Color Television Sets VIF/SIF/Y/Deflection 1chip IC

SANYO -> Panasonic 

LA76810A

VIF Block Test Conditions

Input signal

[VIF block]

Symbol

Test point

Maximum RF AGC

VRFH

4

voltage

Minimum RF AGC

VRFL

4

voltage

RF AGC Delay Pt

RFAGC0

4

(@DAC = 0)

RF AGC Delay Pt

RFAGC63

4

(@DAC = 63)

Input sensitivity

Vi

46

No-signal

VOn

46

video output voltage

Sync signal tip level

VOtip

46

Video output

amplitude

Video S/N

VO

46

S/N

46

C-S beat level

IC-S

46

Differential gain

Differential phase

Maximum AFT

output voltage

Minimum AFT

output voltage

AFT detection

sensitivity

APC pull-in

range (U), (L)

DG

46

DP

46

VAFTH

10

VAFTL

10

VAFTS

10

fPU, fPL

46

Input signal

Test method

Bus conditions

SG1

80dBµ

SG1

80dBµ

SG1

SG1

SG6

No signal

SG1

80dBµ

SG6

80dBµ

SG1

80dBµ

SG1

SG2

SG3

SG5

80dBµ

SG5

80dBµ

SG4

80dBµ

SG4

80dBµz

SG4

80dBµz

SG4

80dBµ

Measure the DC voltage at pin 4.

RF.AGC = "000000"

Measure the DC voltage at pin 4.

RF.AGC = "111111"

Obtain the input level at which the DC voltage at

pin 4 becomes 4.5V.

Obtain the input level at which the DC voltage at

pin 4 becomes 4.5V.

Using an oscilloscope, observe the level at pin 46

and obtain the input level at which the waveform's

p-p value becomes 1.4Vp-p.

Set IF AGC = “1” and measure the DC voltage at

pin 46.

Measure the DC voltage at pin 46.

RF.AGC = "000000"

RF.AGC = "111111"

Using an oscilloscope, observe the level at pin 46

and measure the waveform’s p-p value.

Measure the noise voltage (Vsn) at pin 46 with an

RMS voltmeter through a 10kHz to 5.0MHz

band-pass filter and calculate 20 log (1.43/Vsn).

Input a 80dBµ SG1 signal and measure the DC

voltage (V3) at pin 3. Mix SG1 = 74dBµ, SG2 =

64 dBµ, and SG3 = 64 dBµ to enter the mixture in

the VIF IN. Apply V3 to pin 3 from an external DC

power supply. Using a spectrum analyzer,

measure the difference between pin 46’s

4.43MHz component and 1.07MHz component.

Using a vector scope, measure the level at Pin

46.

Using a vector scope, measure the level at Pin

46.

Set and input the SG4 frequency to 37.9MHz to

be input. Measure the DC voltage at pin 10 at

that moment.

Set and input the SG4 frequency to 39.9MHz to

be input. Measure the DC voltage at pin 10 at

that moment.

Adjust the SG4 frequency and measure

frequency deviation ∆f when the DC voltage at

pin 10 changes from 1.5V to 3.5V.

VAFTS = 2000/∆f [mV/kHz]

Connect an oscilloscope to pin 46 and adjust the

SG4 frequency to a frequency higher than

38.9MHz to bring the PLL into unlocked mode.

(A beat signal appears.) Lower the SG4

frequency and measure the frequency at which

the PLL locks again. In the same manner, adjust

the SG4 frequency to a lower frequency to bring

the PLL into unlocked mode. Higher the SG4

frequency and measure the frequency at which

the PLL locks again.

NoA0252-9/40

Share Link: