ADD8707中文资料12 + 1 Gamma/VCOM Reference with Regulator数据手册ADI规格书

描述 Description

The ADD8707 is a 12-channel, integrated gamma reference with VCOM for use in high resolution TFT LCD monitor and TV panels. The output buffers feature low offset voltage andhigh current drive under transient load conditions to provide an accurate and stable gamma curve. Two channels swing to VDD and two channels swing to GND, increasing the overall range of the curve. A novel approach is used to reduce theexternal component count while increasing accuracy by integrating the gamma setup resistors. To accommodate multiple column drivers and panel architectures, the internal resistor string is mask-programmable, and the tap points are externally accessible. An on-board voltage regulator minimizessupply ripple to provide a fixed point for the resistor string.Here again, external component costs are reduced and the quality of the gray scale is increased.

The ADD8707 is specified over the temperature range of –40°C to +100°C and comes in a robust, low cost, lead frame chip scale package.

特性 Features

• Integrated Voltage Regulator

• Mask Programmable Gamma Resistors: 0.2% Resolution

• Upper/lower Buffers Swing to VDD/GND

• Single-supply Operation: 7.5 V to 16 V



• Continuous Gamma Current Drive: 15 mA

• High Peak VCOM Output Current: 250 mA

• Low Offset Voltage: 15 mV max

• Output Voltage Stable under Transient Load Conditions

• 48-lead Pb-free LFCSP Package