Highly integrated, programmable gamma-correction reference systems with MTP (multiple-time programmable) memory reduce costs in TFT LCDs design by eliminating multiple discrete components. The MAX9672/MAX9673/MAX9674 10bit gamma-correction reference systems from Maxim eliminate a list of components: a digital variable resistor, a VCOM amplifier, gamma buffers, resistor strings, and a high-voltage linear regulator, says the manufacturer. The company's MTP technology enables the integration of non-volatile memory with high-performance amplifiers so that gamma and VCOM registers can be stored on the chip. Each system supports up to 100 rewrite operations of gamma and VCOM values, thus eliminating the need for external EEPROM. They have 12 (MAX9672), 14 (MAX9673), or 16 (MAX9674) programmable gamma-correction outputs and one voltage reference for VCOM adjustment, making them suitable for TFT-LCD applications. Each is packaged in a 5x5mm, 28-pin TQFN-EP package. The devices are specified over -40 to +85°C. An evaluation kit is also available.
