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PDF M51348AVP Data sheet ( Hoja de datos )
| Número de pieza | M51348AVP | |
| Descripción | VIF/SIF for Low Supply Voltage | |
| Fabricantes | ETC | |
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M51348AVP
VIF/SIF for Low Supply Voltage
REJ03F0062-0100Z
Rev.1.0
Sep.19.2003
Description
The M51348 is a low supply voltage, low power semiconductor IC for compact TV sets which includes Video
Intermediate Frequency (VIF), Sound Intermediate Frequency (SIF), and Synchronous Separation (Sync. Sep.)
functions.
An IF amplifier. Video detector (with simultaneous sound detector), IF AGC, RF AGC (forward type), AFT, SIF
limiter amplifier, FM detector electronic volume, and synchronous separation function are provided.
The package is of the 24-pin mini-flat type.
The M513848AFP has better DG and DP but less VIF input sensitivity than the M51348FP.
Features
• This IC can be used with very low supply voltage and low power and it comes in a mini-flat package to suit the
compact TV or compact TV tuner.
Minimum operating power voltage
3V
Consuming current
16mA (when used with 4.5V supply voltage)
• Current automatically decreases to ensure power saving when a strong signal is received, when the electronic
volume control is at its lowest.
• There are separate GND pins for the VIF/Sync. Sep. circuit and for the SIF circuit so that cross-interference is
reduced.
• It is possible to adjust the video detector output amplitude by controlling the 24-pin voltage externally.
• The AGC works fast because of the 2-stage AGC filter.
AGC has high stability against outside noise due to the AGC noise canceller.
• Emitter input circuit is used in Sync. Sep. Output is taken from the Sync. Positive polarity.
Application
Portable B/W, color TV
Recommend Operating Condition
Supply voltage range 3.0V to 6.0V
Rated supply voltage 4.5V
Rev.1.0, Sep.19.2003, page 1 of 9
1 page  
M51348AVP
AC Characteristic (SIF)
No Parameter
1 Circuit current
2 Detector output•
voltage
3 Input limiting
sensitivity
symbol
I
SIF
VoAF
Test
point
9
13
Vimin 13
4 AM rejection ratio AMR
13
5 Bandwidth
BW(s) 13
6 Electronic volume VR1
control
characteristic
VR2
7 Distortion
THD
13
13
8 Operating voltage VSIF
9 Detector output VoH
AF
voltage at high or VoLAF
low voltage
9
13
Input
SG6
90dBµ
SG6
Variable
SG7
90dBµ
SG8
90dBµ
SG6
90dBµ
SG9
90dBµ
SG6
90dBµ
SG6
90dBµ
Test conditions
Input current with 4.5V in 9.
Output amplitude.
Limits
min Typ.
2.2 3.2
200 240
max
4.2
280
Unit
mA
mVrms
Input level when input
32 49
amplitude reaches - 3dB
below VoAF .
Where V denotes output
AM
amplitude,
40 53
AMR=20log VoAF(mVrms)
VAM (mVrms)
Refer to note2.
100 130
dBµ
dB
kHz
Ratio of output amplitude
3.0 3.9 4.8 dB
and Vo when 14 is
AF
changed from 4.0V to 1.0v.
-53 -45
Measured by distortion
meter.
0.4 1.0 %
Must be operated.
3 6 V
Output amplitude with 6.0V
or 3.0V in 9
380 430 480 mVrms
53 64 75
Rev.1.0, Sep.19.2003, page 5 of 9
5 Page | ||
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