BUF22821_TI 具有集成双列存储器的 22 通道伽玛电压发生器和 Vcom 校准器

BUF22821的基本参数

制造厂商：TI
产品类别：电源管理
技术类目：LCD 和 OLED 显示电源和驱动器
功能描述：具有集成双列存储器的 22 通道伽玛电压发生器和 Vcom 校准器
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BUF22821的产品详情：

The BUF22821 offers 22 programmable gamma channels, two programmable V_COM 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 V_COM 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 V_COM 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.

BUF22821的优势和特性：

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.

BUF22821的参数（英文）：

Display type
LCD unipolar
IC integration
Gamma buffer, VCOM
Vin (Min) (V)
9
Vin (Max) (V)
20
Source driver voltage (Min) (V)
9
Source driver voltage (Max) (V)
20
Level shifter/scan driver (ch)
0
Features
Gamma buffer, I2C interface, VCOM or op amp
Rating
Catalog

BUF22821具体的完整产品型号参数及价格（美元）：

BUF22821的完整型号有：BUF22821AIDCPR，以下是这些产品的关键参数及官网采购报价：

BUF22821AIDCPR，工作温度：-40 to 95，封装：HTSSOP (DCP)-38，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：NIPDAU，TI官网BUF22821AIDCPR的批量USD价格：2.86（1000+）

BUF22821的评估套件：

BUF22821EVM-USB — BUF22821 评估板

BUF22821EVM-USB 是一种评估平台，用于评估在各种信号、基准和电源条件下的 BUF22821 伽马电压发生器性能。

该设备提供 22 个可编程的伽马通道，每个通道都拥有 10 位分辨率。

BUF22821EVM Software

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BUF22821的电路图解：

BUF22821的评估套件：