ISL24007
14-Channel Programmable Switchable I²C TFT-LCD Reference Voltage Generator with Integrated 4-Channel Static Gamma Drivers

Key Features

• 14-Channel programmable switchable
• 4-Channel static
• Fast switch time (<1µs)
• Programmable with 20mV resolution
• Digital supply 3.3V
• Supply current of 10mA (without load)
• I²C interface
• RoHS compliant

Description

The ISL24007 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 ISL24007 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.

ISL24007 includes an I²C interface for programming the offset values.

ISL24007 is available in the 38 Ld QFN package and is specified for operation over the -40°C to +85°C temperature range.

Applications

• TFT-LCD drive circuits
• Reference voltage generators