OPT3002

• Wide Optical Spectrum: 300 nm to 1000 nm
• Automatic Full-Scale Setting Feature Simplifies Software and Configuration
• Measurement Levels:
  • 1.2 nW/cm² to 10 mW/cm²
• 23-Bit Effective Dynamic Range With
  Automatic Gain Ranging
• 12 Binary-Weighted, Full-Scale Range Settings:
  < 0.2% (typ) Matching Between Ranges
• Low Operating Current: 1.8 µA (typ)
• Operating Temperature: –40°C to +85°C
• Wide Power-Supply: 1.6 V to 3.6 V
• 5.5-V Tolerant I/O
• Flexible Interrupt System
• Small Form Factor: 2.0 mm × 2.0 mm × 0.65 mm

The OPT3002 light-to-digital sensor provides the functionality of an optical power meter within a single device. This optical sensor greatly improves system performance over photodiodes and photoresistors. The OPT3002 has a wide spectral bandwidth, ranging from 300 nm to 1000 nm. Measurements can be made from 1.2 nW/cm² up to 10 mW/cm², without the need to manually select the full-scale ranges by using the built-in, full-scale setting feature. This capability allows light measurement over a 23-bit effective dynamic range. The results are compensated for dark-current effects, as well as other temperature variations.

Use the OPT3002 in optical spectral systems that require detection of a variety of wavelengths, such as optically-based diagnostic systems. The interrupt pin system can summarize the result of the measurement with one digital pin. Power consumption is very low, allowing the OPT3002 to be used as a low-power, battery-operated, wake-up sensor when an enclosed system is opened.

The OPT3002 is fully integrated and provides optical power reading directly from the I²C- and SMBus-compatible, two-wire, serial interface. Measurements are either continuous or single-shot. The OPT3002 fully-operational power consumption is as low as 0.8 µW at 0.8 SPS on a 1.8-V supply.