產品特性

• Single SDTV Filter

• 6th-order Butterworth Low-Pass Filter：

• 9MHz -3dB Bandwidth, 57.2dB Attenuation(27MHz)

• Support Multiple Input Biasing:

  - Provide 80-mV Level-Shift when DC-Coupled

  - Transparent Input Clamping when AC-Coupled

  - Support External DC Biasing when AC-Coupled

• Low Quiescent Current: 3.85mA（Typical）

• Slew Rate: 38V/μs

• 6dB Gain (2V/V) with Rail-to-Rail Output

• AC- or DC-Coupled Output Driving Dual Video Loads(75Ω)

• Wide Operation Range: +2.85V to +5.5V Single Supply

• Robust ESD Protection:

  — HBM 8KV, CDM 2KV

• Lead-Free SC70 Package Available

典型應用

• Video Signal Amplification

• Set-Top Box Video Driver

• PVR、DVD Player Video Buffer

• Video Buffer for Portable or USB-Powered Video Devices

• HDTV

產品概述

TPF111 is a low-cost reconstruction video filter optimized for consumer video devices. With its video performance and low power consumption, it is the choice for portable video applications. Integrated with a 6thorder Butterworth filter, TPF111 can be used as a DAC reconstruction filter or ADC anti-aliasing filter. With its -3dB frequency of 9MHz, it is a choice for SD video applications including NTSC and PAL. TPF111 accepts both AC- and DC-coupled inputs and its biasing options meet the requirement of the most demanding applications. The integrated Transparent Sync-tip Clamp circuit restores DC voltage level of an AC-coupled Video signal. It translates the sync tip of a CVBS, Y', or RGB signal to a fixed 40mV. External biasing resistors can be used to restore signals without sync tip such as Pb' or Pr'. Integrated level shifter then raises the clamped video signal by 80mV, assuring passing through of video signal without being distorted. When the signal is DC-coupled, the level shifter will raise the signal by 80mV.

TPF111 may be used for different kinds of video buffering with 6dB gain(2V/V) and rail-to-rail output. It supports AC- and DC-coupling at the output.TPF111 is designed to have exceptional ESD rating. It is a choice of protecting the main video processor chip from ESD or surge strikes in applications such as set-top-boxes.TPF111 operates from a single supply with wide voltage range from +2.85V to +5.5V. Its low quiescent current of 3.85mA makes it a choice for battery-power or USBpower applications.TPF111 is available in SC70-5 package (TPF111-C) and SOIC-8 package (TPF111-S). Its operation temperature range is from ?40°C to +85°C.