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LM2485

Features: · VCC capable of up to 220V· VBB selectable to 8V or 12V via Pin 12 option· Wide bias output voltage range of over 100V· Inverted output pulse suitable for G1 blanking,selectable to 20VP-P or 40VP-P via Pin 13 optionApplication· AC coupled CRT applications using DTV formats up to 1080i· ...

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SeekIC No. : 004394865 Detail

LM2485: Features: · VCC capable of up to 220V· VBB selectable to 8V or 12V via Pin 12 option· Wide bias output voltage range of over 100V· Inverted output pulse suitable for G1 blanking,selectable to 20VP-P...

LM2485 Data Sheet

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Part Number:
LM2485
Supply Ability:
5000

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  • 1~5000
  • Unit Price
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  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· VCC capable of up to 220V
· VBB selectable to 8V or 12V via Pin 12 option
· Wide bias output voltage range of over 100V
· Inverted output pulse suitable for G1 blanking,selectable to 20VP-P or 40VP-P via Pin 13 option


Application

· AC coupled CRT applications using DTV formats up to 1080i
· Well-matched to the NSC LM12XX Family of Preamplifiers and LM242X/3X/5X Family of DTV CRT Drivers


Pinout

Connection Diagram


Specifications

If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Supply Voltage, VCC .......................................................250V
Bias Voltage, VBB .............................................................15V
Input Voltage, VIN ...........................................-0.5V to +6.5V
Blanking Input Voltage, VBIN ...........................-0.5V to +6.5V
Storage Temperature Range, TSTG ............-65°C to +150°C
Lead Temperature (Soldering,<10sec.) .......................300°C
ESD Tolerance
Human Body Model ..........................................................2 kV
Machine Model ................................................................200V
Max Junction Temperature ..........................................150°C
JA (Max at 0 LFPM) ..................................................68°C/W


Description

The LM2485 is a triple channel clamp amplifier used to DC restore the AC coupled outputs of a DTV CRT driver and for cut-off adjustment. The LM2485 also has an integrated blanking amplifier that can be used to drive the G1 grid of a CRT negative for vertical retrace blanking. The blanking output has a selectable pulse amplitude of either 20VP-P or 40VP-P via the Pin 13 option. The blanking input pulse can be generated from a vertical flyback pulse or by a microcontroller.

The LM2485 can operate with a VCC supply of up to 220V and a VBB supply of either 8V or 12V. This VBB option,selectable via the Pin 12 option, ensures the LM2485 is compatible with any National Semiconductor DTV CRT
driver sharing the same operating voltages in the application.

The LM2485 is packaged in an industry standard 24-lead molded plastic dual-in-line package to meet high voltage spacing
requirements.




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