ISL29102 datasheet(7/9 Pages) INTERSIL

Numer części	ISL29102

Szczegółowy opis	Low Power Ambient Light-to-Voltage Non-Linear Converter

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Producent	INTERSIL [Intersil Corporation]

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7

FN6483.1

July 15, 2010

Application Information

Light-to-Voltage Conversion

The ISL29102 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, VOUT is the output voltage, E is the light

intensity and REXT is the value of the external resistor. The

REXT is used to set the light-to-voltage scaling constant. The

compliance of the ISL29102's output circuit may result in

premature saturation when an excessively large REXT is

used. The output compliance voltage is 700mV below the

supply voltage as listed in VO-MAX of the “Electrical

Specifications” table on page 3.

Optical Sensor Location Outline

The green area in Figure 18 shows the optical sensor

location outline of ISL29102. 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.

VOUT

1.8

μA

100lux

-----------------------

EREXT

×

=

(EQ. 1)

FIGURE 18. 6 LD ODFN SENSOR LOCATION OUTLINE

2.10mm

2.00mm

0.39mm

0.46mm

0.19mm

ISL29102

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ISL29102 Arkusz danych(PDF) 7 Page - Intersil Corporation

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