TMD2620
Proximity Sensor Module
General Description
The device is an advanced proximity sensor. 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.
Ordering Information
and
Content Guide
appear at end of
datasheet.
Figure 1:
Added Value of Using TMD2620
Benefits
•
Reduced board space requirements and
enables low-profile system design
•
Reduced power consumption
Features
•
Small footprint and low profile package
•
3.10 x 2.00 x 1.00 mm
•
0.18μm process technology with 1.8V I²C bus
Applications
The TMD2620 is ideal for mobile phone touch screen disable.
ams Datasheet
[v1-01] 2016-Aug-02
Page 1
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TMD2620 −
General Description
Block Diagram
The functional blocks of this device are shown below:
Figure 2:
Functional Blocks of TMD2620
Optically
Isolated IR
LED
PGND
Prox ADC
Prox Data
I²C Interface
LEDA
Prox Control
Lower Upper
Prox
Thresholds
Wait Control
SCL
SDA
Prox
Integration
INTR
IR
Detector
Interrupt
Control
VDD
GND
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ams Datasheet
[v1-01] 2016-Aug-02
TMD2620 −
Pin Assignment
Pin Assignment
Figure 3:
TMD2620 Pinout (Top View)
Figure 4:
Pin Description
Pin Number
1
2
3
4
5
6
7
8
Pin Name
I/C
INT
PGND
LEDA
SCL
SDA
VSS
VDD
Description
Internal connection. Connect to ground.
Interrupt. Open drain output (active low)
Ground for LED current sink and I/O buffers
LED anode
I²C serial clock input
I²C serial data I/O terminal
Ground. All voltages are referenced to GND
Supply voltage
ams Datasheet
[v1-01] 2016-Aug-02
Page 3
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TMD2620 −
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
Recommended
Operating Conditions
is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Figure 5:
Absolute Maximum Ratings
Symbol
VDD
LEDA
V
IO
(SDA, INT)
T
STRG
I
SCR
ESD
HBM
ESD
CDM
Parameter
Supply voltage
Supply voltage
Digital I/O terminal voltage
Output terminal current
Storage temperature range
Input current (latch up immunity)
JEDEC JESD78D Nov 2011
Electrostatic discharge HBM
S-001-2014
Electrostatic discharge CDM
JEDEC JESD22-C101F Oct 2013
Min
-0.3
-0.3
-0.3
-1
-40
CLASS 1
±2000
±500
Max
2.2
3.6
3.6
20
85
Units
V
V
V
mA
ºC
V
V
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ams Datasheet
[v1-01] 2016-Aug-02
TMD2620 −
Electrical Characteristics
Electrical Characteristics
Figure 6:
Recommended Operating Conditions
Symbol
V
DD
V
LEDA
T
A
Parameter
Supply voltage
Voltage supplied to LEDA pin
Operating free-air temperature
(1)
Min
1.7
Typ
1.8
3.3
Max
2.0
Units
V
V
-30
85
°C
Note(s):
1. While the device is operational across the temperature range, performance will vary with temperature. Operational characteristics are at
25°C, unless otherwise noted.
Figure 7:
Operating Characteristics, V
DD
= 1.8 V, T
A
= 25ºC (unless otherwise noted)
Symbol
f
OSC
Parameter
Oscillator frequency
Conditions
Min
Typ
8.0
Max
Units
MHz
IDD
Supply current
(1)
Idle state
(PON=1, PEN=0)
(2)
Sleep state
(3)
30
μA
0.7
5.0
0.6
μA
V
VOL
INT, SDA output low voltage
6 mA sink current
ILEAK
VIH
VIL
Note(s):
Leakage current, SDA, SCL, INT pins
SCL, SDA input high voltage
SCL, SDA input low voltage
-5
1.26
5
μA
V
0.54
V
1. Values are shown at the VDD pin and do not include current through the IR LED.
2. Idle state occurs when PON=1 and all functions are not enabled.
3. Sleep state occurs when PON = 0 and I²C bus is idle. If Sleep state has been entered as the result of operational flow, SAI = 1, PON will remain
high.
ams Datasheet
[v1-01] 2016-Aug-02
Page 5
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