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BUF22821

ACTIVO

Generador de tensión gamma de 22 canales y calibrador Vcom con memoria integrada de dos bancos

Detalles del producto

Display type LCD unipolar IC integration Gamma buffer, VCOM Vin (min) (V) 9 Vin (max) (V) 20 Applications 13 to 21 inches, 21 inches and above, 7 inches or less, 7 to 13 inches 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 Operating temperature range (°C) -40 to 95
Display type LCD unipolar IC integration Gamma buffer, VCOM Vin (min) (V) 9 Vin (max) (V) 20 Applications 13 to 21 inches, 21 inches and above, 7 inches or less, 7 to 13 inches 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 Operating temperature range (°C) -40 to 95
HTSSOP (DCP) 38 62.08 mm² 9.7 x 6.4
  • 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.

  • 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.

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.

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.

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Documentación técnica

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Tipo Título Fecha
* Data sheet Programmable Gamma-Voltage Generator and Vcom Calibrator with Two-Bank Memory datasheet (Rev. D) 12 jul 2011
EVM User's guide BUF22821EVM-USB Users Guide (Rev. A) 31 may 2016
Application note Driving Capacitive Loads with Gamma Buffers 20 nov 2012
More literature BUF22821EVM Thank You Letter 21 dic 2007
EVM User's guide BUF22821EVM Evaluation Board User's Guide / Software Tutorial 11 sep 2007

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

BUF22821EVM-USB — Placa de evaluación BUF22821

The BUF22821EVM-USB is a platform for evaluating the performance of the BUF22821 gamma-voltage generator under various signal, reference and supply conditions.

This device offers 22 programmable gamma channels, each with 10 bit resolution.

Guía del usuario: PDF
Soporte de software

SBOC245 BUF22821EVM Software

Productos y hardware compatibles

Productos y hardware compatibles

Productos
Controladores y alimentación para pantallas LCD y OLED
BUF22821 Generador de tensión gamma de 22 canales y calibrador Vcom con memoria integrada de dos bancos
Soporte de software

SBOC417 BUF22821EVM-USB User Software

Productos y hardware compatibles

Productos y hardware compatibles

Productos
Controladores y alimentación para pantallas LCD y OLED
BUF22821 Generador de tensión gamma de 22 canales y calibrador Vcom con memoria integrada de dos bancos
Desarrollo de hardware
Placa de evaluación
BUF22821EVM-USB Placa de evaluación BUF22821
Soporte de software

SBOC418 BUF22821EVM-USB Source Code

Productos y hardware compatibles

Productos y hardware compatibles

Productos
Controladores y alimentación para pantallas LCD y OLED
BUF22821 Generador de tensión gamma de 22 canales y calibrador Vcom con memoria integrada de dos bancos
Desarrollo de hardware
Placa de evaluación
BUF22821EVM-USB Placa de evaluación BUF22821
Modelo de simulación

Gamma Buffer I2C IBIS Model

SBOM409.ZIP (39 KB) - IBIS Model
Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Paquete Pasadores Descargar
HTSSOP (DCP) 38 Ver opciones

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.

Si tiene preguntas sobre la calidad, el paquete o el pedido de productos de TI, consulte el soporte de TI. ​​​​​​​​​​​​​​

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