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LA7780M

Features: • Since a preamplifier is built in, the LA7780M has adequate sensitivity to handle the input signal from the cable directly. (Input signal level:30 to +30 dBm)• Both internal and external AGC are supported as the AGC amplifier drive technique.• The output amplitude of t...

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SeekIC No. : 004390768 Detail

LA7780M: Features: • Since a preamplifier is built in, the LA7780M has adequate sensitivity to handle the input signal from the cable directly. (Input signal level:30 to +30 dBm)• Both internal a...

LA7780M Data Sheet

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Part Number:
LA7780M
Supply Ability:
5000

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  • 1~5000
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Product Details

Description



Features:

• Since a preamplifier is built in, the LA7780M has adequate sensitivity to handle the input signal from the cable directly. (Input signal level:30 to +30 dBm)
• Both internal and external AGC are supported as the AGC amplifier drive technique.
• The output amplitude of the post amplifier used to drive the A/D converter is 2 Vp-p (typical).
• Applications can be designed to use either a crystal or an inductor oscillator.


Specifications

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage VCCmax Pins 5, 6, and 17 7.0 V
Circuit voltage V max Pins 4, 12, and 24 VCC  
Circuit current I4 The pin 4 output current 30  
I13 The pin 13 sink current 2  
I16 The pin 16 sink current 2  
Allowable power dissipation Pdmax Ta 70°C 540 mW
Operating temperature Topr   20 to + 70 °C
Storage temperature Tstg   55 to + 150 °C



Description

The LA7780M is a downconverter for QPSK data demodulation for digital CATV transmission. This IC integrates a preamplifier, an AGC amplifier, a mixer, an oscillator, a post-amplifier, and other circuits in a single chip, and provides all the functions required from cable signal input through output to the A/D converter.




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