ISL29000_07 Datasheet, PDF (6/7 Pages) Intersil Corporation – Ambient Light Photo Detect IC

ISL29000
Short Circuit Current Limit
The ISL29000 does not limit the output short circuit current.
If the output is directly shorted to the ground continuously,
the output current could easily increase for a strong input
light such that the device may be damaged. Maximum
reliability is maintained if the output continuous current never
exceeds 6mA by adding a load resistor at the output. This
limit is set by the design of the internal metal interconnects.
Suggested PCB Footprint
Footprint pads should be a nominal 1-to-1 correspondence
with package pads. The large, exposed central die-mounting
paddle in the center of the package requires neither thermal
nor electrical connections to PCB, and such connections
should be avoided.
Power Supply Bypassing and Printed Circuit
Board Layout
The ISL29000 is relatively insensitive to the printed circuit
board layout due to its low speed operation. Nevertheless,
good printed circuit board layout is necessary for optimum
performance. Ground plane construction is highly
recommended, lead length should be as short as possible
and the power supply pins must be well bypassed to reduce
the risk of oscillation. For normal single supply operation,
where the GND pin is connected to ground, a 0.1µF ceramic
capacitor should be placed from VCC pin to GND pin. A
4.7µF tantalum capacitor should then be connected in
parallel, placed close to the device.
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Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
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FN6117.4
February 9, 2007