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10-Bit Programmable Gamma Reference System with MTP for TFT LCDs

10-Bit DAC Resolution and MTP Memory Provides Nonvolatile Memory, Eliminating the Need for External EEPROM

Product Details

Key Features

Parametric specs for Programmable Gamma Buffers
# Total Channels 16
# Programmable Channels 16
Resolution (bits) 10
Integrated Nonvolatile Memory Yes
Memory Banks 1
VCOM Calibrator Yes
VCOM Buffer Yes
Interface I2C
VSUPPLY (V) 9 to 20
IQ (mA) 20
Oper. Temp. (°C) -40 to +85
Package/Pins TQFN/28
Budgetary
Price (See Notes)
0
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Simplified Block Diagram

Technical Docs

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Parameters

Parametric specs for Programmable Gamma Buffers
# Total Channels 16
# Programmable Channels 16
Resolution (bits) 10
Integrated Nonvolatile Memory Yes
Memory Banks 1
VCOM Calibrator Yes
VCOM Buffer Yes
Interface I2C
VSUPPLY (V) 9 to 20
IQ (mA) 20
Oper. Temp. (°C) -40 to +85
Package/Pins TQFN/28
Budgetary
Price (See Notes)
0

Key Features

  • 16-Channel Gamma Correction, 10-Bit Resolution
  • VCOM Driver
  • Integrated MTP Memory
  • Programmable VCOM Limits
  • 200mA Peak Current on Gamma Channels
  • 600mA Peak Current on VCOM Channel
  • 1µs Settling Time

Applications/Uses

  • TFT LCDs

Description

The MAX9669 outputs 16 voltage references for gamma correction in TFT LCDs and one voltage reference for VCOM. Each gamma reference voltage has its own 10-bit digital-to-analog converter (DAC) and buffer to ensure a stable voltage. The VCOM reference voltage has its own 10-bit DAC and an amplifier to ensure a stable voltage when critical levels and patterns are displayed. The MAX9669 features integrated multiple-time programmable (MTP) memory to store gamma and VCOM values on the chip, eliminating the need for external EEPROM. The MAX9669 supports up to 100 write operations to the on-chip nonvolatile memory.

The gamma outputs can drive 200mA peak transient current and settle within 1µs. The VCOM output can provide 600mA peak transient current and also settles within 1µs. The analog supply voltage range extends from 9V to 20V, and the digital supply voltage range extends from 2.7V to 3.6V.

Gamma values and the VCOM value are programmed into registers through the I²C interface.

Simplified Block Diagram

MAX9669: Functional Diagram MAX9669: Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.