Mobile Phones, PHS
Notebook PCs, PDAs
Video cameras, Digital Still Cameras
Other Equipment Requiring Luminosity Adjustment

The TPS851 is an ultra-compact surface-mount photo-IC for illuminance sensors which incorporates a photodiode and current amp circuit in a single chip.
The sensitivity is superior to that of a phototransistor, and exhibits little variation.
It has spectral sensitivity closer to luminous efficiency and excellent output linearity.
With its ultra-compact surface-mount package, this photo-IC can be used as the power-saving control for domestic appliances or for backlighting for displays in cellular phones, this device enables low power consumption to be achieved.

• Ultra-compact and light surface-mount package:
   2.0mm × 2.1mm × 0.7 mm
• Excellent output linearity of illuminance
• Little fluctuation in light current and high level of sensitivity:
   • IL = 37 μA to 74 μA @EV = 100 lx using fluorescent light
   • Light current variation width = ×1.67 (when light current
      classification is specified.)
   • Little temperature fluctuation
• Built-in luminous-efficiency correction function, reduced sensitivity variations due to various light sources:
   IL (using incandescent light)/IL (using fluorescent light) = 1.2 (typ.)
• Low supply voltage, making device suitable for battery-powered equipment: VCC = 2.7 V to 5.5 V