isl76671 Intersil Corporation, isl76671 Datasheet - Page 7

• Manufacturer Part Number: isl76671
• Description: Low Power,
• Manufacturer: Intersil Corporation

Application Information
Light-to-Voltage Conversion
The ISL76671 has responsiveness that is a square-root function
of the light intensity intercepted by the photodiode in lux.
Because the photodiode has a responsivity that resembles the
human eye, conversion rate is independent of the light source
(fluorescent light, incandescent light or direct sunlight).
In Equation 1, V
and R
set the light-to-voltage scaling constant. The compliance of the
ISL76671's output circuit may result in premature saturation
when an excessively large R
recommended for automotive applications. The output
compliance voltage is 700mV below the supply voltage as listed
in V
V
OUT
O-MAX
EXT
=
---------------------- - E R
2.00mm
is the value of the external resistor. The R
18μA
100lux
of the “Electrical Specifications” table on page 3.
OUT
is the output voltage, E is the light intensity
×
EXT
0.19mm
EXT
7
is used. A R
FIGURE 20. 6 LD ODFN SENSOR LOCATION OUTLINE
EXT
value of 1
EXT
is used to
00k
ISL76671
(EQ. 1)
Ω is
2.10mm
Optical Sensor Location Outline
The green area in Figure 20 shows the optical sensor location
outline of ISL76671. Along the pinout direction, the center line
(CL) of the sensor coincides with that of the packaging. The
sensor width in this direction is 0.39mm. Perpendicular to the
pinout direction, the CL of the sensor has an 0.19mm offset from
the CL of packaging away from pin 1. The sensor width in this
direction is 0.46mm.
0.39mm
0.46mm
December 12, 2011
FN7716.1