BUF22821数据手册开发板套件编程器的评估演示板及套件规格书PDF

描述 Description

The BUF22821 offers 22 programmable gamma channels, two programmable VCOM channels, and two static gamma channels. It is ideal for the new 10-bit source drivers that require 22 gamma channels. The final gamma and VCOM values can be stored in the on-chip, nonvolatile memory. To allow for programming errors or liquid crystal display (LCD) panel rework, the BUF22821 supports up to 16 write operations to the on-chip memory. The BUF22821 has two separate banks of memory, allowing simultaneous storage of two different gamma curves to facilitate switching between gamma curves.All gamma and VCOM channels offer a rail-to-rail output that typically swings to within 100mV of either supply rail with a 10mA load. All channels are programmed using an I2C interface that supports standard operations up to 400kHz and high-speed data transfers up to 3.4MHz. The BUF22821 is manufactured using Texas Instruments' proprietary, state-of-the-art, high-voltage CMOS process. This process offers very dense logic and high supply voltage operation of up to 20V. The BUF22821 is offered in a HTSSOP-38 PowerPAD™ package. It is specified from -40°C to +85°C.

特性 Features

• 24-CHANNEL GAMMA
• 22-CHANNEL PROGRAMMABLE
• 2-CHANNEL STATIC GAMMA

• 2-CHANNEL PROGRAMMABLE VCOM
• 10-BIT RESOLUTION
• 16x REWRITABLE NONVOLATILE MEMORY
• TWO INDEPENDENT MEMORY BANKS
• RAIL-TO-RAIL OUTPUT
• LOW SUPPLY CURRENT: 0.5mA/channel
• SUPPLY VOLTAGE: 9V to 20V
• DIGITAL SUPPLY: 2V to 5.5V
• I2C™ INTERFACE
• APPLICATIONS
• TFT-LCD REFERENCE DRIVERS

PowerPAD is a trademark of Texas Instruments. I2C is a trademark of NXP Semiconductors. All other trademarks are the property of their respective owners.