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Si1120-A-GM Arkusz danych(PDF) 1 Page - Silicon Laboratories

Numer części Si1120-A-GM
Szczegółowy opis  PROXIMITY/AMBIENT LIGHT SENSOR WITH PWM OUTPUT
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Producent  SILABS [Silicon Laboratories]
Strona internetowa  http://www.silabs.com
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Rev. 1.0 8/10
Copyright © 2010 by Silicon Laboratories
Si1120
Si1120
P ROXIMITY/A MBIENT L IGHT S ENSOR WITH PWM O UTPUT
Features
Applications
Description
The Si1120 is a low-power, reflectance-based proximity and ambient light
sensor with advanced analog signal processing and analog PWM output.
It includes an integrated differential photodiode, signal processor, and
LED driver. Proximity sensing is based on the measurement of reflected
light from an external, optically-isolated, strobed LED. A separate visible
light photodiode is used for ambient light sensing. The standard package
for the Si1120 is an 8-pin ODFN.
Typically 50 cm meter proximity
range with single pulse
Seven precision optical
measurement modes:

3 proximity ranges

3 dc ambient ranges

1 calibration mode
Low-noise ambient cancelling
circuit allows maximum
sensitivity with 8–12 bit resolution
ALS works in direct sunlight
(100 klux)
Minimum reflectance sensitivity
<1 µW/cm2
High EMI immunity without
shielded packaging
Power supply: 2.2–3.7 V
Operating temperature range:
–40 to +85 °C
Typical 10 µA current
consumption
Programmable 400/50 mA LED
constant current driver output
Allows independent LED supply
voltage
Small outline 3 x 3 mm (ODFN)
Handsets
Touchless switches
Occupancy sensors
Consumer electronics
Notebooks/PCs
Industrial automation
Display backlighting control
Photo-interrupter
U.S. Patent #5,864,591
U.S. Patent #6,198,118
Other patents pending
Pin Assignments
MD
VSS
TXO
TXGD
SC
VDD
PRX
STX
1
2
3
4
8
7
6
5
Si1120
ODFN


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