tdk ambient light sensor

7/24/2019 TDK Ambient Light Sensor

1/7

Visible Radiant Optical Sensor /Data Sheet BCS2015A1

Shapes and dimension Equivalent circuitGlass SubstrateBCS2015A1

Electrical Characterisic Temperature= 25deg.C

Item ValueUnits Min. Typ. Max.

Output current 100Lux*1 Vop=5V A 6.0 8.0 10.0Operation voltage (Vop) 100Lux*1 V 1.2 --- 5.0Dark current Vop=5V nA --- --- 10

*Initial valueAbsolute Maximum Ratings Temperature= 25deg.C

Item ValueUnits

Operation voltage V 8Reverse voltage V -1Output current mA 1

Optical Characteristic Temperature= 25deg.CItem Value

Units

Spectral sensivty area nm 350 to 750Peak of sensivity nm 58020

OthersItem Value

UnitsOperating temperature deg. C -20 to 85Keep and transfer temperature deg. C -40 to 85Dimensions mm 2.01.50.6tWeight g 0.004

*1 White Fluor Light (color temperature=4200K)51101

*All specifications are subject to change without notice.

Application

Brightness control for LCD, EL and CRT

Brightness control for Keypads (e. g. Mobile Phones)

Positioning scanline for Rear Projecton TV

Exposure adjust for Compact Camera

Sub exposure adjust for Digital Camera

Dimensions in [mm]

( ) : Typical value

TDK Visible Radiant Optical Sensor is the photo-IC which uses an amorphous

silicone semiconductor technology. It is the most suitable for Brightness

Adjustment, Control of the Lighting systems. BCS2015A1 has current-

amplifire in it. BCS2015A1 is for surface mounthing.

Features

Highly receptive to visible light but not receptive to infrared light (close to

Human eye visibility).

Accurate illumination measurement can be taken without the use of an

infrared filter.

( Phototransistors and photodiodes that use crystal- silicon semiconductors

typically require this filtering.)

High output (Built-in current amplifire)

Surface mounting can be used in lead- free reflow soldering.

Lead- free, Cadmium-free

+

_

0.6

0.5

0.6

1.

2 t=0.6(typ.) 0.7(Max.)

Photo acceptance area

- Electrode + Electrode

1.

5

2

(0.

825)

(1.325)

(0.

55)

(0.55)


2/7

Output characteristic(typical):BCS2015A1

Measuring circuit diagram

1.E-07

1.E-06

1.E-05

1.E-04

1.E-03

1.E-02

1 10 100 1,000 10,000 100,000

Illuminance(Lx)

OutputCurrent(A)

Vop=3V

Vop=4V

Vop=5V

Optical sensor

Light

+

A

V

I-meter

V-meter-

Vop

2


3/7

BCS2015A1Characteristic of Output Voltage (Typical)

Measuring circuit

Photo-IC

Vo

RL

Vcc

Illuminance dependency of Max. Vo (Typical)

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

100 1000 10000

Illuminance(Lx)

Max.

Vo(V)

Vcc=5V

Vcc=3V


4/7

Vcc=3V

1.E-03

1.E-02

1.E-01

1.E+00

1.E+01

1.E+00 1.E+01 1.E+02 1.E+03 1.E+04

IlluminanceLx

Vo

V

Vcc=5V

1.E-03

1.E-02

1.E-01

1.E+00

1.E+01

1.E+00 1.E+01 1.E+02 1.E+03 1.E+04

Illuminamce(Lx)

Vo

(V)

RL=950 ohm

RL=20k ohm

RL=260k ohm

RL=4k ohm

RL=55k ohm RL=630k ohm


5/7

Typical photo response time:BCS2015A1 (typ.)

Measuring circuit

1.E-04

1.E-03

1.E-02

1.E+03 1.E+04 1.E+05

Load Resistor RL ()

Photo

responsetime(sec)

tr

tf

Optical sensor

LED pulse light

+

- VoutV

RL

2V

Vout

tr tf

90%

10%

4


6/7

Temperature stability of output current:BCS2015A1 (typical)

Spectral response:BCS2015A1 (typical)

0.0

0.2

0.4

0.6

0.8

1.0

300 400 500 600 700 800

Wave length(nm)

Relativeresponce

Human eyes

(CIE standard)

BCS2015A1

*VR=5V

FL 100Lux

0.6

0.7

0.8

0.9

1

1.1

1.2

-10 0 10 20 30 40 50 60 70 80

Temperature(deg.C)

Relativeoutputcurrent

3


7/7

Recommended land pattern

(mm) Stress

Recommanded reflow heat condition

Recommended land pattern is shown in Fig. Please arrange a land in the direction as

shown in Fig. to the direction of curvature as the result of heat stress by reflow and/or

physical stress.

*Pb Flee Solder is SnAgCu.

150deg./C

200deg./C

220deg./C

Less than 40sec

60sec.-100sec.

cooled gradually

For Pb-Sn soldering process

150deg./C

180deg./C

230deg./C

245deg./C - 255deg./C (MAX. 255deg./C)

60sec.-120sec.

30sec - 40sec

For Pb-Flee soldering process

cooled gradually

0.65

1.

2

0.45

0.5 0.65

0.45

0.

2

0.

5

0.

5

5

tdk ambient light sensor

Documents