TMG3992
Gesture, Color, ALS, and Proximity
Sensor Module with mobeam™
Barcode Emulation
General Description
The device features advanced Gesture detection, Proximity
detection, Digital Ambient Light Sense (ALS), Color Sense
(RGBC), and optical pattern generation/transmission for
broadcast. The slim modular package,
2.0mm × 3.95mm × 1.36mm, incorporates an IR LED and factory
calibrated LED driver.
Gesture detection utilizes four directional photodiodes to
sense reflected IR energy (sourced by the integrated LED) to
convert physical motion information (i.e. velocity, direction and
distance) to a digital information. The architecture of the
gesture engine features automatic activation (based on
Proximity engine results), ambient light subtraction, cross-talk
cancelation, dual 8-bit data converters, power saving
inter-conversion delay, 32-dataset FIFO, and interrupt driven
I
2
C communication. The gesture engine accommodates a wide
range of mobile device gesturing requirements: simple
North-South-East-West gestures or more complex gestures can
be accurately sensed. Power consumption and noise are
minimized with adjustable IR LED timing.
The Proximity detection feature provides object detection (E.g.
mobile device screen to user’s ear) by photodiode detection of
reflected IR energy (sourced by the integrated LED).
Detect/release events are interrupt driven, and occur whenever
proximity result crosses upper and/or lower threshold settings.
The proximity engine features offset adjustment registers to
compensate for system offset caused by unwanted IR energy
reflections appearing at the sensor. The IR LED intensity is
factory trimmed to eliminate the need for end-equipment
calibration due to component variations. Proximity results are
further improved by automatic ambient light subtraction.
The Color and ALS detection feature provides red, green, blue
and clear light intensity data. Each of the R, G, B, C channels
have a UV and IR blocking filter and a dedicated data converter
producing16-bit data simultaneously. This architecture allows
applications to accurately measure ambient light and sense
color which enables devices to calculate illuminance and color
temperature, control display backlight, and chromaticity.
mobeam™ barcode emulation is achieved using the IRBeam
optical pattern generation/transmission feature. IRBeam is
primarily intended for 1-D barcode transmission over IR to
point-of-sale (POS) terminals. The IRBeam engine features a
1024-bit RAM for pattern storage and specialized control logic
that is tailored to repetitively broadcast a barcode pattern using
the integrated LED. The IRBeam engine features adjustable
ams Datasheet
[v1-04] 2014-Oct-24
Page 1
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TMG3992 −
General Description
timing, looping, and IR intensity to maximize successful
barcode reception rate among the multitude of different
barcode scanner/readers currently in use globally.
Ordering Information
and
Content Guide
appear at end of
datasheet.
Key Benefits & Features
The benefits and features of TMG3992, Gesture, Color, ALS, and
Proximity Sensor Module with mobeam™ Barcode Emulation
are listed below:
Figure 1:
Added Value of using TMG3992
Benefits
Single Device Integrated Optical Solution
Features
Gesture Detection, Proximity, Color/ALS and IRBeam Support
Power Management Features
UV and IR blocking filters
Programmable Gain & Integration Time
16.7M:1 Dynamic Range
Four separate diodes sensitive to different directions
Ambient Light Rejection
Offset Compensation
Programmable Driver for IR LED current
32 Dataset storage FIFO
Interrupt Driven I²C Communication
Very High Sensitivity
Trimmed to provide consistent reading
Ambient Light Rejection
Proximity Offset Compensation
Saturation Indicator bit
Programmable Driver for IR LED current
98,000:1 Dynamic Range
IRBeam Hardware Support
Pattern Storage in Internal RAM
Integrated LED driver with current control for both Proximity
and IRBeam
Ambient Light Sensing
Complex Gesture Sensing
Ideal for Operation Behind Dark Glass
Proximity Detection
Barcode Pattern Generation and
Transmission
Dual Use of a Single Internal LED
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ams Datasheet
[v1-04] 2014-Oct-24
TMG3992 −
Absolute Maximum Ratings
Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Rating”
may cause permanent damage to the device. These are stress
ratings only. Functional operation of the device at these or any
other conditions beyond those indicated under
Recommended
Operating Conditions
is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Figure 5:
Absolute Maximum Ratings (all voltages with respect to GND)
Symbol
V
DD
Parameter
Supply voltage
Min
Max
3.8
4.8
Units
V
V
V
V
V
V
V
mA
ºC
V
Comments
All voltages are with respect to GND
T
A
= 0 to 70ºC
T
A
= -30 to 85ºC
LEDA
Supply voltage
4.4
Digital I/O terminal voltage
- 0.5
3.8
4.4
T
A
= -30 to 85ºC
(1)
T
A
= 0 to 70ºC
(1)
T
A
= -30 to 85ºC
(2)
LDR
Max voltage
4.8
3.8
(SDA, INT)
T
stg
Output terminal current
Storage temperature range
ESD tolerance, human
body model
-1
- 40
-2000
20
85
2000
Note(s) and/or Footnote(s):
1. Measured with LDR = OFF.
2. LDR = ON.
ams Datasheet
[v1-04] 2014-Oct-24
Page 5
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