M52721SP 查看數據表（PDF） - MITSUBISHI ELECTRIC

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M52721SP

WIDEBAND VIDEO PREAMPLIFIER WITH OSD MIX

MITSUBISHI ELECTRIC  

MITSUBISHI ICs (Monitor)

M52721SP

WIDEBAND VIDEO PREAMPLIFIER WITH OSD MIX

ELECTRICAL CHARACTERISTICS TEST METHOD

ICC Circuit current

When there is no signal, fix SWA on side “a”, and measure ICC,

using ampere meter A.

Vomax Output dynamic range

Input SG8 to pin 5, and set V11 at 0.5V

(V)

9.0

0.0

TP16 OUTPUT WAVEFORM

Gradually increase the amplitude of SG8 from 700mV, and

measure the amplitude of the TP16 output waveform when the

upper side of the waveform becomes distorted.

Vimax Maximum allowable input

From the condition in Vomax above, change V7 to 2.5V, gradually

increase the amplitude of SG8 from 700mVP-P, and read the input

signal amplitude when the output signal starts to be distorted.

Gv Maximum gain

Read the amplitude of TP16 output: it should be taken as V0.

The maximum gain GV is determined by:

GV=20LOG

V0 [VP-P]

0.7 [VP-P]

[dB]

VB2 Brightness control characteristics 2

Set brightness (V11) at 2.0V, and measure the output of TP16 with

a voltmeter. This value is VB2.

VB3 Brightness control characteristics 3

Set brightness (V11) at 3.0V, and measure the output of TP16 with

a voltmeter. This value is VB3.

F1-a Frequency characteristics 1-a f=100MHz

F2-a Frequency characteristics 2-a f=200MHz

With zero resistance between pins 13 and 16, apply a DC voltage to

pin 5 so that the bottom of the input waveform reaches 2.6V. Next,

apply a DC voltage to pin 8 so that the bottom of the output

waveform reaches 2.4V.

Input SG1 and measure the amplitude of TP16 output (V01).

Input SG2 and measure the amplitude of TP16 output (V02).

Input SG3 and measure the amplitude of TP16 output (V03).

F1-a and F2-a are determined by:

F1-a=20LOG

V02 [VP-P]

V01 [VP-P]

[dB]

F2-a=20LOG

V03 [VP-P]

V01 [VP-P]

[dB]

Tr Pulse characteristics (rise time)

Tf Pulse characteristics (fall time)

1. Measure the rise time Tr1 and fall time Tf1 between 10 and 90%

of the input pulse with an active probe.

2. Next, measure the rise time Tr2 and fall time Tf2 between 10 and

90% of the output pulse with an active probe.

Tr (nsec)= (Tr2)2-(Tr1)2

Tf (nsec)= (Tf2)2-(Tf1)2

VCR1 Contrast control characteristics 1

Set V7 at 2.5V, and read the amplitude of TP16 output: it should be

taken as V01.

VCR1=20LOG

V01 [VP-P]

0.7 [VP-P]

[dB]

VCR2 Contrast control characteristics 2

Set V7 at 1.0V, and read the amplitude of TP16 output: it should be

taken as V02.

VCR2=20LOG

V02 [VP-P]

0.7 [VP-P]

[dB]

VB1 Brightness control characteristics 1

Set brightness (V11) at 1.0V, and measure the output of TP16 with

a voltmeter. This value is VB1.

V10th Clamp pulse threshold voltage

While monitoring the output (approx. 2.4VDC), decrease the SG6

pulse width gradually and measure the SG6 amplitude when the

output reaches 2.4V or more.

W10 Clamp pulse minimum width

While monitoring the output (approx. 2.4VDC), decrease the SG6

amplitude gradually and measure the SG6 pulse width when the

output becomes 2.4V or more.

OTr OSD pulse characteristics (rise time)

OTf OSD pulse characteristics (fall time)

Measure the OSD rise time Tr and OSD fall time Tf between 10 and

90% of the output pulse with an active probe.

V19th OSD input threshold voltage

While monitoring the output, decrease the SG7 amplitude gradually

and measure the SG7 amplitude when the output reaches 0V.

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