Texas Instruments BUF20800, User Manual

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Overview
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24 Control Panel Button and Window
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25 Program OTP All Channels (BUF20820 DUT Only)
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26 BUF20800/20820EVM Schematic
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27 BUF20800/20820EVM PCB Top Layer (Component Side)
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List of Tables
1 BUF20800/20820EVM Kit Contents
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2 Signal Definition of J1 (25-Pin Male DSUB) on BUF20800/20820EVM Board
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3 BUF20800/20820EVM Test Board Jumper Functions
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4 USB_DIG_Platform Jumper Functions
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5 Bill of Materials
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1 Overview
The BUF20800 and BUF2082 are programmable gamma-voltage generators and V
COM
calibrators. The
BUF20800 offers two banks of 18 programmable gamma channels and two programmable V
COM
channels,
making it ideal for 10-bit source TFT-LCD reference drivers. The BUF20820 also features programmable
OTP memory that allows the user to store the gamma voltages on-chip, which eliminates the need for an
external EEPROM. The BUF20800/20820EVM is a platform for evaluating the performance of either the
BUF20800 or BUF20820 under various signal, reference, and supply conditions. This document gives a
general overview of the BUF20800/20820EVM, and provides a general description of the features and
functions to be considered while using this evaluation module. Unless otherwise noted, all references to
the device under test (DUT) apply to both the BUF20800 and the BUF20820.
2 BUF20800/20820EVM User Guide and Software Tutorial SBOU100 – April 2011
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