413101
Visible Light Detector with Analog
and Digital Outputs
Preliminary Datasheet
Revision A
This document is the property of Semefab (Scotland) Ltd and is furnished in confidence
and upon the condition that it is neither copied nor released to a third party without prior
consent.
Page 1 of 12
DESCRIPTION
The 413101 is a low cost 4-pin visible
light sensor, with a current output which
is directly proportional to the light level.
It has a built in optical filter to provide a
response which is close to the human
eye, or “photopic”. It also has a digital
output to provide on/off switching, with
hysteresis to prevent flicker.
The output current can be converted
to a voltage by connecting it in series
with a resistor. The dynamic range is
determined by the external resistor and
power supply (e.g. 10K and 5V gives a
range of 0 to over 250 Lux, but can be
up to 1000 lux with a 1K resistor). The
internal
dark
current
cancellation
enables high accuracy over the full
temperature range, even at low light
levels.
FEATURES
•
Near human eye photopic response
•
High IR rejection – integrated optical filter
•
Current output highly linear vs light level
•
1uA per lux current output
•
External resistor sets linear lux range
•
Temperature stable
•
Integrated high gain photo-current amplifier
•
Dark-current cancellation
•
Digital output for on/off switching
•
Hysteresis to prevent flicker close to switching
threshold
APPLICATIONS
•
Dawn/dusk sensing
•
Security lighting
•
Night-lights
•
LCD backlight control
1.0 Basic application & test circuit
Figure A
VSS
ADJ
413101
DIG_OUT
VDD
Supply
The 413101 is supplied as
probed wafers.Failing die are
marked with black ink-dots.
On/Off
Signal
RSS
VADJ
Pin Description
VDD – Positive supply
ADJ – Adjust (analog output)
VSS – Ground
DIG_OUT – Digital output (on/off signal)
