SFH7770E6 Datasheet, PDF (1/33 Pages) OSRAM GmbH – Ambient Light and Proximity Sensor

SFH 7770 E6
Ambient Light and Proximity Sensor
1 Abstract
This application note describes technical
details and provides some application
guidelines for the combined ambient light
and proximity sensor SFH 7770 E6.
Compared to its predecessors (SFH 7770
E4 and E5), the SFH 7770 E6 features a
mores sensitive proximity sensor (up to
five times improved sensitivity) and
improved ambient light sensor (sensitive
down to 0.03 lx).
The document starts with a general
introduction to the device, followed by a brief
overview on the features (Sec. 2) and
operating modes (Sec. 3) of the sensor. The
integration and operation of the sensor in an
I²C bus environment is described in Sec. 4,
whereas Sec. 5 covers the interrupt
capabilities of the SFH 7770 E6.
Sec. 6 provides a functional description of
the sensor. Optical design guidelines and
application relevant information are given in
Sec. 7 followed by the guidelines for the
electrical design in Sec. 8. Finally Sec. 9
presents a sample software code.
More general information about ambient
light sensing, technical data and I²C bus are
available in the following documents:
- OSRAM OS general application note
on ambient light sensing [1]
- SFH 7770 E6 datasheet [2]
- I²C bus specification [3]
- Driving a LED with an external driver
(> 200 mA) application note [4]
2 Introduction
The SFH 7770 E6 is a compact device
which is designed for simultaneous
Fig. 1: Ambient Light and Proximity
Sensor SFH 7770 E6.
detection of ambient light and proximity of
reflecting objects. Applications are mobile
phones, PDAs, notebooks, cameras and
other consumer products.
The device includes the following features:
• Proximity Sensor (PS)
- Detection-range up to 200 mm
- Gesture recognition possible
- Outputs to drive up to three IR
emitters
- Optimized for 850 nm emitters
- Immune to ambient light
• Ambient Light Sensor (ALS)
- 0.03lx - 65000lx- High linearity
- Spectral sensitivity well matched to
the human eye
• I²C interface
- 100 kHz / 400 kHz and 3.4 MHz
mode
- 3 programmable measurement
modes (STAND-BY, TRIGGERED,
FREE-RUNNING)
• Current consumption < 5 μA in
STAND-BY mode
• Small package size, 2.8 x 2.8 x 0.9
mm³
February 27, 2012
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