AMIS-749803 Datasheet, PDF (7/15 Pages) AMI SEMICONDUCTOR – (I2C) Ambient Light Sensor

AMIS–749803: (I²C) Ambient Light Sensor
Data Sheet
Table 4: Operating Characteristics, V_DD = 3.3V, T_A = 25°C (unless otherwise noted)
Parameter
Test Conditions
Min. Typ.
R_e irradiance responsivity
R_v illuminance responsivity
λp (see Figure 3)
Fluorescent light source:
Ev = 100lux (see Figure 4)
Fluorescent light source:
Ev = 1000lux (see Figure 4)
550
109
1275
R_v illuminance responsivity
R_v illuminance responsivity
R_v illuminance responsivity
R_v illuminance responsivity
Dark current
Incandescent light source:
Ev = 100lux (see Figure 5)
Incandescent light source:
Ev = 1000lux (see Figure 5)
Sun light direct:
100 Ev = Lux (see Figure 6)
Sun light direct:
1000 Ev = Lux (see Figure 6)
Sun light shade (w/attenuating filter):
Ev = 100lux (see Figure 7)
Sun light shade (w/attenuating filter):
Ev = 1000lux (see Figure 7)
Ev = 0lux (see Figure 16)
125
1120
100
995
37
375
To be
provided
Max.
Units
nM
Counts
Counts
Counts
Counts
Counts
7.0 Device Operation
This device employs a sensitive photo diode which is fabricated in AMIS C3 standard CMOS process technology. The major
components of this sensor are as shown in Figure 10. The photons which are to be detected are passed through an AMIS proprietary
color filter. This color filter is used to limit all extraneous photons and thus perform a band pass filter operation on the incident wave
front. Thus this filter transmits only those photons in the visible spectrum which are primarily detected by human eye. The photo
response of this sensor is as shown in Figure 3.
749803 (I2C)
hν
ADC
16-bits
Control
I²C serial
interface
I2CCLK
I2CDATA
Figure 10: Block Diagram
AMI Semiconductor – July 2006, M-20599-001
7
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