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The ISL24006 is a 14-channel programmable switchable reference voltage generator with four channels of static gamma drivers integrated, for a complete 18-channel total gamma solution for TFT-LCD displays. The 14-channel programmable switchable configuration allows switching between two gamma curves.

The ISL24006 is divided into two banks of seven generators: one designed to cover the range from V_{REFL_L} to V_{REFL_H}; the remaining seven channels covering the range from V_{REFU_L} to V_{REFU_H}. Each bank has its own separate high and low reference inputs, with integrated buffers (four static gamma drivers) to drive the column driver internal DAC resistor string to within 0.2V from the top and bottom rails. An output MUX is used to switch between the two curves in less than 1µs. Switching is controlled using an external select pin.

ISL24006 includes an I²C interface for programming the offset values.

ISL24006 is available in the 38-pin QFN package and is specified for operation over the -40°C to +85°C temperature range.

Key Features

• 14-channel programmable switchable
• 4-channel static
• Fast switch time (< 1µs)
• Programmable with 20mV resolution
• Digital supply 3.3V to 5V
• Supply current of 32mA (without load)
• Rail-to-Rail capability
• I2C interface
• Pb-free plus anneal available (RoHS compliant)

Applications

• TFT-LCD drive circuits
• Reference voltage generators