Tokyo, Japan Oki Electric Industry Co., Ltd. says it has introduced the industry's first thin-film SOI-based ultraviolet (UV) sensor IC. The ML 8511 features an analog voltage output and does not require an optical cut filter. Samples will be available in June 2007 for use in portable UV meters.
Key specifications include:
- Maximum sensitivity wavelength: 35 nm
- Power voltage: 2.7 to 3.6V
- Consumption current: Typically 300 microamps (μA) (when operating), 0.1μA (standby) at 3.0 V
- Output voltage: 1.0 V (in dark) to 2.2 V (10 mW/cm2 at 365 nm)
- Operating temperature: 0°C to 70°C
- Package: 12-pin QFN (4.0 x 3.0 x 0.7 mm)
By adding a built-in operational amplifier, the ML8511 enables the analog voltage output function on a single chip. The optical cut filter can also be eliminated, enabling manufacturers to develop small and high-mobility UV devices at a low cost, said the company. In addition, because Oki's UV sensor IC uses SOI-CMOS technology, which enables easy integration, it is well-suited to usage in mounting digital and analog circuits.
Demands for UV sensors are increasing, particularly for use in portable devices. Conventional UV sensors use compound semiconductors such as gallium nitride, making it difficult to mount peripheral circuits on a single chip, and because silicon-based UV sensors require an optical wavelength cut filter, problems such as piece-to-piece variation in sensor characteristics and decline in sensitivity can occur, according to Oki.
Availability: Sample shipments will start in June 2007 followed by volume production in December 2007.
Oki Electric Industry Co., Ltd., www.oki.com