BUF22821开发板套件编程器的评估演示板及套件规格书PDF中文资料

BUF22821属于开发板套件编程器的评估演示板及套件。由德州仪器制造生产的BUF22821评估和演示板及套件该系列产品提供了一种方便的方法，在经过验证的实施环境中评估某些重点器件的性能或特性。评估方法通常有完善的文档说明，并且视乎具体情况由评估软件提供支持。产品通常由印刷电路板组成，板上已装有重点器件以及必要或有用的支持元器件，另外也可能包括其他组件，例如电缆或电源。对于数量特别多或类别独特的器件类别(如 ADC、DAC 和开关模式电源)，评估平台可组合为一个单独的产品系列。

1FEATURES

234• 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

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.