Description
The HSDL-9001 is a low cost analog-output ambient light photo diode in lowest cost miniature Quad-Flat-No Lead (QFN) lead-free surface mount package. It consists of a photodiode, which peaks in human luminosity curve at 550 nm. Hence, it provides an excellent responsivity that is close to the response of human eyes, as shown in figure 2. It provides a design-alternative to the HSDL-9000 digital-output ambient light photo sensor with infinite ambient light detection threshold control. Both the HSDL-9000 and HSDL-9001 are ideal for applications in which the measurement of ambient light is used to control display backlighting. Mobile appliances such as the mobile phones and PDAs that draw heavy current from the display backlighting will benefit from incorporating the HSDL-9000 and HSDL-9001 in their designs to reduce the power consumption significantly.

Features
• Excellent responsivity which peaks in
   the human luminosity curve at 550 nm
   Close responsivity to the human eye
• Miniature QFN surface-mount
   package
   Height – 0.60 mm
   Width – 2.00 mm
   Depth – 1.50 mm
• Infinite ambient light detection
   threshold control
• Guaranteed temperature performance
   –25°C to 85°C
• VCC supply 2.7 to 3.6 V
• Lead-free package

Applications
• Detection of ambient light to control
   display backlighting
   Mobile devices – mobile phones, PDAs
   Computing devices – notebooks,
   webpads
   Consumer devices – TVs, video
   cameras, digital still cameras
• Daylight and artificial light exposed
   devices