TMD3725
ALS, Color and Proximity Sensor
Module
General Description
The device features advanced proximity measurement, color
sense (RGBC+IR), and digital ambient light sensing (ALS). The
package has been designed to accommodate a “single hole”
aperture approach. The slim module incorporates an IR LED and
factory calibrated LED driver. 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 when proximity result crosses upper and/or
lower threshold settings. The proximity engine features offset
adjustment registers to compensate for unwanted IR energy
reflection at the sensor. Proximity results are further improved
by automatic ambient light subtraction. The ALS detection
feature provides photopic light intensity data. The color
photodiodes have UV and IR blocking filters and a dedicated
data converters producing 16-bit data. This architecture allows
applications to accurately measure ambient light which
enables devices to calculate illuminance and color temperature
to control display backlight and chromaticity.
Ordering Information
and
Content Guide
appear at end of
datasheet.
Key Benefits & Features
The benefits and features of TMD3725, ALS, Color and Proximity
Sensor Module are listed below:
Figure 1:
Added Value of Using TMD3725
Benefits
•
Single glass aperture solution
•
Reduced board space requirements and
enables low-profile system design
Features
•
1.0mm spacing between proximity IR LED and sensor
•
Small footprint and low-profile package
(3.65 mm x 2.00 mm x 1.00 mm)
•
•
•
•
UV / IR blocking filters
460 Average FOV
Photopic ambient light sensing (ALS)
Programmable gain and integration time
•
Accurate color temperature and ambient light
sensing
•
Compact integrated optical module
•
Color (RGB), Ambient Light and Proximity Sensing
with integrated IR LED
•
Power management features
(active, idle and sleep states)
•
1.8V power supply with 1.8V I²C bus
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•
Reduced power consumption
ams Datasheet
[v1-05] 2018-Mar-08
TMD3725 −
General Description
Applications
The TMD3725 applications include:
•
Ambient light sensing
•
Single hole proximity sensing
•
Mobile phone touch screen disable
•
Color temperature sensing to assist backlight, camera,
and flash control
Block Diagram
The functional blocks of this device are shown below:
Figure 2:
Functional Blocks of TMD3725
LEDK/LDR
Optically
Isolated
IR
LED
Proximity LED
Current Sink
PGND
LEDA
Prox ADC
Prox Data
Prox Control
SCL
Lower
Upper
Prox Thresholds
Prox Integration
Wait Control
I²C Interface
SDA
ALS Thresholds
IR - Ch 4
ALS Control
Lower
Upper
Clear - Ch 0
Red - Ch 1
Green - Ch 2
CH0 ADC
CH1 ADC
CH2 ADC
CH3 ADC
CH0 Data
CH1 Data
CH2 Data
CH3 Data
Interrupt Out /
Threshold Status
INT
Blue - Ch 3
VDD
TMD37253S
GND
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[v1-05] 2018-Mar-08
TMD3725 −
Pin Assignment
Pin Assignment
Figure 3:
Pin Diagram of TMD3725
Figure 4:
Pin Description of TMD3725 (8-Pin Module)
Pin Number
1
2
3
4
5
6
7
8
Pin Name
VDD
SDA
SCL
LEDA
LEDK/LDR
PGND
INT
VSS
Supply voltage
Description
I²C serial data I/O terminal
I²C serial clock input terminal
LED anode
LED driver (sinks current) and
LED cathode (for direct access to LED)
Ground for LED current sink and pins with open drain
Interrupt. Open drain output (active low)
Ground. All voltages are referenced to GND
ams Datasheet
[v1-05] 2018-Mar-08
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TMD3725 −
Absolute Maximum Ratings
Absolute Maximum Ratings
Stresses beyond those listed under
Absolute Maximum Ratings
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
Electrical
Characteristics
is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device
reliability.
Figure 5:
Absolute Maximum Ratings
Symbol
Parameter
Min
Max
Units
Comments
Electrical Parameters
VDD
LEDA
V
IO
I
IO
Supply Voltage to Ground
LED Voltage to PGND
Digital I/O Terminal Voltage
SDA, INT Output Terminal
Current
-0.3
-0.3
-0.3
-1
2.2
3.6
3.6
20
V
V
V
mA
Electrostatic Discharge
I
SCR
Input Current
(latch up immunity)
JEDEC JESD78D
Electrostatic Discharge
HBM
JS-001-2014
Electrostatic Discharge
CDM
JEDEC JESD22-C101F
±100
mA
Class II
ESD
HBM
± 2000
V
ESD
CDM
± 500
V
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ams Datasheet
[v1-05] 2018-Mar-08
TMD3725 −
Absolute Maximum Ratings
Symbol
Parameter
Min
Max
Units
Comments
Temperature Ranges and Storage Conditions
T
STRG
Storage Temperature Range
-40
85
°C
IPC/JEDEC J-STD-020
The reflow peak soldering
temperature (body temperature)
is specified according to
IPC/JEDEC J-STD-020
“Moisture/Reflow Sensitivity
Classification for Non-hermetic
Solid State Surface Mount
Devices.”
T
BODY
Package Body Temperature
260
°C
RH
NC
MSL
Relative Humidity
(non-condensing)
Moisture Sensitivity Level
5
3
85
%
Maximum floor life time 168 hours
ams Datasheet
[v1-05] 2018-Mar-08
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