TFT-LCD VCOM/Gamma Buffer offers fast table switching.
Press Release Summary:
Composed of 10 independent gamma channels and one VCOM channel, DS3510 is integrated gamma/VCOM buffer with on-chip EEPROM that supports 4 gamma curves and rapid switching among curves. Each channel includes 4 bytes of EEPROM, 2 latches, one 8-bit DAC, and one buffer amplifier. Features enable pin-controllable, gamma/VCOM table switching in less than 300 ns. Each table implements different gamma curve, which lets TFT-LCD designers compensate for range of conditions.
Original Press Release:
First TFT-LCD VCOM/Gamma Buffer with On-Chip EEPROM Provides Pin-Controlled Table Switching in < 300ns
Highly Integrated, Programmable Gamma/VCOM Buffer
o The DS3510 is the first gamma/VCOM buffer for TFT-LCD panels with four tables of on-chip EEPROM and pin-controlled table switching in less than 300ns.
o The DS3510 enables TFT-LCD panels to rapidly respond to changing conditions, such as temperature, ambient light, backlight setting, and color mode.
o This rapid response is enabled by the on-chip EEPROM, which stores four gamma curves and an associated VCOM value for each curve.
o The DS3510 gives the TFT-LCD designer unprecedented flexibility in maximizing display performance over a wide variety of real-world conditions.
SUNNYVALE, CA-April 10, 2008-Maxim Integrated Products (Pink Sheets: MXIM) introduces the DS3510 highly integrated gamma/VCOM buffer with on-chip EEPROM that supports four gamma curves and rapid switching among curves. This device is composed of ten independent gamma channels and one VCOM channel; each channel includes 4 bytes of EEPROM, two latches, an 8-bit DAC, and a high-performance buffer amplifier. These features enable pin-controllable, gamma/VCOM table switching in less than 300ns. When speed is not critical, table switching can be commanded through an I²C-compatible interface. Each table implements a different gamma curve, which allows TFT-LCD designers to compensate for a wide variety of conditions, such as temperature, ambient-light level, backlight setting, aging, and color mode in sequential displays.
Additionally, each of the DS3510's ten gamma outputs supports current sinking/sourcing over the full analog range. Competitive solutions typically place inconvenient voltage and current-direction restrictions on each gamma output, which can lead to incompatibility with column-driver input characteristics and complicate PCB layout. The DS3510 eliminates these concerns.
This device operates from a 2.7V to 5.5V digital supply and supports an analog supply range of 9.0V to 15.0V. Fully specified to operate over a wide -45°C to +95°C temperature range, the DS3510 is packaged in a 48-pin TQFN that is available in either bulk or tape-and-reel form. Prices start at $1.50 (10,000-up, FOB USA).
Maxim Integrated Products, a two billion dollar company, designs and manufactures ICs for analog and mixed-signal applications. The company has designed over 5400 products, more than any other analog semiconductor company, in the 25 years since its founding.
