TAOS TSL4531

TSL4531
DIGITAL AMBIENT LIGHT SENSOR
r
r
TAOS112 − OCTOBER 2011
PACKAGE CL
ChipLED
(TOP VIEW)
Features
D Simple Direct Lux Output
D Approximates Human Eye Response in
Diverse Lighting Conditions
VDD 1
4 SCL
GND 2
3 SDA
D Three User-Selectable Integration Times
(400 ms, 200 ms, and 100 ms)
D Wide Dynamic Range — 3 lux to 220k lux
D Rejects 50 Hz/60 Hz Lighting Ripple
D Low Active Current (110 A typical) with
Package Drawing Not to Scale
Applications
Power Down Mode (2.2 A typical) Enables
Green Products
16-bit Digital Output with I2C Compatibility
Ultra-Small 2 mm 2 mm ChipLED package
D Outdoor Lighting Control
D
D
D 2.5-V Supply Voltage with 1.8-V Logic
Interface
D
D
− Street Lights
− Security Lights
− Traffic Signals
− Commercial Billboards
Display Backlight Control
− Automotive Instrumentation
− Cell Phones
− Tablets and Notebooks
Solid-State and General Lighting and
Daylight Harvesting
− Commercial Lighting
− Industrial Lighting
Description
The TSL4531 family of devices provides ambient light sensing (ALS) that approximates human eye response
under a variety of lighting conditions. The devices have three selectable integration times and provide a direct
16-bit lux output via an I2C bus interface. The wide dynamic range of the ALS makes it particularly useful in
outdoor applications where it is exposed to direct sunlight. The device is ideal for use in automatic control of
street lights and security, billboard, and automotive lighting. The TSL4531 devices can also be used in solid state
and general lighting for automatic control and daylight harvesting to maximize energy conservation. Other
applications include display backlight control to extend battery life and optimize visibility in cell phones, tablets,
and notebooks.
Functional Block Diagram
I2C Interface
Lux Calc
ADC
VDD
SCL
SDA
Photodiode
Array
The LUMENOLOGY r Company
Copyright E 2011, TAOS Inc.
r
Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road S Suite 300 S Plano, TX 75074 S (972)
r 673-0759
www.taosinc.com
1
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
Detailed Description
The device contains a photodiode array, an integrating analog-to-digital converter (ADC), signal processing
circuitry, lux calculation logic, and an I2C serial interface on a single CMOS integrated circuit to provide lux data
with a 16-bit output. No external circuitry is required for signal conditioning. The device features power
management modes where the user can select continuous operation, power save mode in which the device
inserts a power saving state between each acquisition, or single-cycle operation in which the device enters a
power-down state after data acquisition. The device has three user-selectable integration times of 100 ms,
200 ms, or 400 ms, allowing the user to adjust the sensitivity of the device.
Terminal Functions
TERMINAL
NAME
NO.
TYPE
GND
2
SCL
4
I
SDA
3
I/O
VDD
1
DESCRIPTION
Power supply ground. All voltages are referenced to GND.
I2C serial clock input terminal.
I2C serial data I/O terminal — bidirectional.
Supply voltage.
Available Options
DEVICE
ADDRESS
INTERFACE DESCRIPTION
ORDERING NUMBER
0x39
CL−4
I2C
Vbus = VDD Interface
TSL45311CL
TSL45313†
0x39
CL−4
I2C Vbus = 1.8 V Interface
TSL45313CL
TSL45315†
0x29
CL−4
I2C Vbus = VDD Interface
TSL45315CL
CL−4
I2C
TSL45317CL
TSL45317
†
PACKAGE − LEADS
TSL45311†
0x29
Vbus = 1.8 V Interface
Contact TAOS for availability.
Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage, VDD (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5 V
Input terminal voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 4.5 V
Output terminal voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 4.5 V
Output terminal current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −1 mA to 20 mA
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40°C to 85°C
ESD tolerance, human body model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2000 V
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
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-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to GND.
Recommended Operating Conditions
Supply voltage, VDD
Operating free-air temperature, TA
Copyright E 2011, TAOS Inc.
NOM
MAX
2.3
2.5
3.3
V
70
°C
−15
UNIT
The LUMENOLOGY r Company
r
r
2
MIN
www.taosinc.com
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
Operating Characteristics, VDD = 2.5 V, TA = 25C (unless otherwise noted)
PARAMETER
IDD
Supply current
ILEAK
Leakage current, SDA and SCL pins
VIH
SCL SDA input high voltage
SCL,
VIL
SCL SDA input low voltage
SCL,
TEST CONDITIONS
MIN
TYP
MAX
Active (Note 1)
110
130
Power down — no I2C activity
2.2
4
−5
TSL45311, TSL45315
0.7 VDD
TSL45313, TSL45317
1.25
5
UNIT
μA
μA
V
TSL45311, TSL45315
0.3 VDD
TSL45313, TSL45317
0.54
V
NOTE 1: The average supply current will be slightly lower when PSAVESKIP = 0.
ALS Characteristics, VDD = 2.5 V, TA = 25C, TCNTRL = 1 (Tint = 400 ms) (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
ADC count value
0
λp = white LED, CCT = 4000K, EV = 1000 lux
λp = 880 nm + 940 nm, Ee = 345 μW/cm2
(Note 1)
ADC count value ratio
Inc std A/Fluorescent F12 (Notes 2 & 4)
80
Sensor output responsivity
λp = white LED, CCT = 4000K
0.8
Dynamic range
Incandescent light source: STD A
(Notes 3 & 4)
Temperature coefficient
Integration time
Total cycle time
MAX
UNIT
65535
counts
1000
ADC count value
NOTES: 1.
2.
3.
4.
5.
TYP
3
1
counts
120
%
1.2
count/lux
3
220k
−15°C to 0°C
−0.25
0
0°C to 70°C
−0.20
0
TCNTRL = 10
96
100
104
TCNTRL = 01
192
200
208
TCNTRL = 00
384
400
416
TCNTRL = 10, PSAVESKIP = 0 (Note 5)
110.4
115
119.6
TCNTRL = 01, PSAVESKIP = 0 (Note 5)
220.8
230
239.2
TCNTRL = 00, PSAVESKIP = 0 (Note 5)
441.6
460
478.4
lux
% / °C
ms
ms
Combination of IR LEDs used with peak wavelengths of 880 nm and 940 nm for IR rejection production test.
Incandescent STD A light source at 300 lux. Fluorescent F12 light source at 300 lux.
220,000 lux reading possible with TCNTRL set to 4× MULTIPLIER (Tint = 100 ms).
Not tested in production.
When PSAVESKIP = 1, total cycle time equals integration time.
The LUMENOLOGY r Company
Copyright E 2011, TAOS Inc.
r
r
www.taosinc.com
3
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
AC Electrical Characteristics, VDD = 2.5 V, TA = 25C (unless otherwise noted)
PARAMETER†
TEST CONDITIONS
MIN
TYP
MAX
UNIT
400
kHz
f(SCL)
Clock frequency
t(BUF)
Bus free time between start and stop condition
4.7
μs
t(HDSTA)
Hold time after (repeated) start condition. After
this period, the first clock is generated.
4
μs
t(SUSTA)
Repeated start condition setup time
4.7
μs
t(SUSTO)
Stop condition setup time
4
μs
t(HDDAT)
Data hold time
300
ns
t(SUDAT)
Data setup time
250
ns
t(LOW)
SCL clock low period
4.7
μs
t(HIGH)
SCL clock high period
4
μs
t(TIMEOUT)
Detect clock/data low timeout
tF
tR
Ci
Input pin capacitance
†
25
35
ms
Clock/data fall time
300
ns
Clock/data rise time
1000
ns
10
pF
Specified by design and characterization — not production tested.
PARAMETER MEASUREMENT INFORMATION
t(LOW)
t(R)
t(F)
VIH
SCL
VIL
t(HDSTA)
t(BUF)
t(HIGH)
t(HDDAT)
t(SUSTA)
t(SUSTO)
t(SUDAT)
VIH
SDA
VIL
P
Stop
Condition
S
S
P
Start
Condition
Figure 1. Timing Diagrams
Copyright E 2011, TAOS Inc.
The LUMENOLOGY r Company
r
r
4
www.taosinc.com
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
TYPICAL CHARACTERISTICS
NORMALIZED RESPONSIVITY
vs.
ANGULAR DISPLACEMENT — CL PACKAGE
NORMALIZED SPECTRAL RESPONSIVITY
100
1.0
90
Photoptic
70
60
4531
50
40
30
Optical Axis
0.8
Normalized Responsivity
Normalized Responsivity
80
0.6
0.4
20
0.2
10
0
300
500
700
900
λ − Wavelength − nm
0
−90
1100
−60
−30
0
30
60
− Angular Displacement − °
Figure 2
90
Figure 3
IDD
vs.
VDD
OUTPUT
vs
ILLUMINANCE
160
1000k
150
Output — Counts
140
IDD — A
130
25C
120
70C
−15C
110
10k
100
100
90
80
2.2
1
2.4
2.6
2.8
3
3.2
3.4
100
1
VDD − V
Figure 4
The LUMENOLOGY r Company
10k
1000k
Illuminance — lux
Figure 5
Copyright E 2011, TAOS Inc.
r
r
www.taosinc.com
5
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
PRINCIPLES OF OPERATION
Analog-to-Digital Converter
The TSL4531 contains one integrating analog-to-digital converter (ADC) that integrates the current from the
photodiode array. Upon completion of the conversion cycle, the conversion result is transferred to the data
registers. Transfers are double-buffered to ensure that invalid data is not read during the transfer. After the
transfer, the device will either automatically begin another integration cycle, or enter power-down mode,
depending upon the mode setting in the control register.
The device features several key power management features. The mode of operation can be controlled to
provide either continuous operation or single acquisition operation followed by a power-down state. In the
continuous operation, a secondary mode can be enabled allowing the device to go into a low-power state in
between each acquisition cycle.
The device allows the user to control the integration time. This enables the user to control the sensitivity of the
device to allow for the greater dynamic range needed in bright lighting conditions such as sunlight. Integration
times of 400 ms, 200 ms, or 100 ms are available. All integration times are multiples of 50 ms, allowing rejection
of 50/60-Hz ripple present in a typical fluorescent lights. The lux output needs to be scaled depending on the
integration time as shown in the calculating lux section.
Calculating Lux
The ADC output is a 16-bit number that is directly proportional to the value that approximates the human eye
response in the commonly used illuminance unit of lux. The light level can be calculated using the following
expression.
Light Level (lux) = MULTIPLIER × [ (DATAHIGH << 8) + DATALOW ]
Where:
MULTIPLIER = 1 for TCNTRL = 00 (Tint = 400 ms),
MULTIPLIER = 2 for TCNTRL = 01 (Tint = 200 ms), and
MULTIPLIER = 4 for TCNTRL = 10 (Tint = 100 ms), and
<< 8 indicates a logical 8-bit shift left operation, and
TCNTRL is a 2-bit field in the configuration register (0x01)
Example:
MULTIPLIER = 1
DATALOW = 0x9C
DATAHIGH = 0x63
Illuminance =
=
=
=
Copyright E 2011, TAOS Inc.
1 × [ (DATAHIGH << 8) + DATALOW] lux
(0x63 << 8) + 0x9C lux
0x639C lux
25,500 lux
The LUMENOLOGY r Company
r
r
6
www.taosinc.com
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
I2C Protocol
Interface and control are accomplished through an I2C serial compatible interface (standard or fast mode) to
a set of registers that provide access to device control functions and output data. The devices support the 7-bit
I2C addressing protocol.
The I2C standard provides for three types of bus transaction: read, write, and a combined protocol (Figure 6).
During a write operation, the first byte written is a command byte followed by data. In a combined protocol, the
first byte written is the command byte followed by reading a series of bytes. If a read command is issued, the
register address from the previous command will be used for data access. Likewise, if the MSB of the command
is not set, the device will write a series of bytes at the address stored in the last valid command with a register
address. The command byte contains either control information or a 5-bit register address. The control
commands can also be used to clear interrupts.
The I2C bus protocol was developed by Philips (now NXP). For a complete description of the I2C protocol, please
review the NXP I2C design specification at http://www.i2c−bus.org/references/.
A
N
P
R
S
Sr
W
...
Acknowledge (0)
Not Acknowledged (1)
Stop Condition
Read (1)
Start Condition
Repeated Start Condition
Write (0)
Continuation of protocol
Master-to-Slave
Slave-to-Master
1
S
7
1
Slave Address
W
1
8
A
1
Command Code
8
A
1
Data Byte
A
8
1
1
...
P
I2C Write Protocol
1
S
7
1
Slave Address
R
1
8
A
1
Data
A
Data
1
...
A
P
I2C Read Protocol
1
7
1
1
8
1
1
7
1
1
S
Slave Address
W
A
Command Code
A
Sr
Slave Address
R
A
8
1
Data
A
8
Data
1
A
1
...
P
I2C Read Protocol — Combined Format
Figure 6. I2C Protocols
The LUMENOLOGY r Company
Copyright E 2011, TAOS Inc.
r
r
www.taosinc.com
7
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
Register Set
The device is controlled and monitored by data registers and a command register accessed through the serial
interface. These registers provide for a variety of control functions and can be read to determine results of the
ADC conversions.
Table 1. Register Set
ADDRESS
RESISTER NAME
R/W
REGISTER FUNCTION
RESET
VALUE
−−
COMMAND
W
Specifies register address
0x00
0x00
CONTROL
R/W
Power on/off and single cycle
0x00
0x01
CONFIG
R/W
Powersave Enable / Integration Time
0x00
0x04
DATALOW
R
ALS Data LOW Register
0x00
0x05
DATAHIGH
R
ALS Data HIGH Register
0x00
0x0A
ID
R
Device ID
ID
The mechanics of accessing a specific register depends on the specific protocol used. See the section on I2C
protocols on the previous pages. In general, the COMMAND register is written first to specify the specific
control/status register for following read/write operations.
There are 16 register locations, but only 5 registers are implemented. To make the register read process more
efficient when reading multiple bytes of data as in the combined format protocol, the address index pointer is
automatically incremented to skip over the unused registers, as shown in Figure 7.
Address in hex
Address increments by 1 except where noted:
Cycle is 0h, Ah, Bh, Ch, Dh, 0h
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Figure 7. Combined Format Read Cycle Pattern
Command Register
The command register specifies the address of the target register for future write and read operations. It
contains two user fields as described below and defaults to 0x00 at power-on.
Table 2. Command Register
7
6
COMMAND
COMMAND
FIELD
BITS
5
4
3
Reserved
2
1
ADDRESS
DESCRIPTION
COMMAND
7
Reserved
6:4
Reserved. Write as 0.
ADDRESS
3:0
Address register. Selects the specific register for write and read transactions that follow.
Copyright E 2011, TAOS Inc.
Select Command Register. Must write as 1.
The LUMENOLOGY r Company
r
r
8
0
www.taosinc.com
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
Control Register (0x00)
The CONTROL register is used to power the device on/off and single cycle.
Table 3. Control Register
7
6
5
4
3
2
1
Reserved
CONTROL
0
Reset
0x00
MODE
FIELD
BITS
Reserved
7:2
Reserved. Write as 0.
DESCRIPTION
MODE
1:0
Operating Mode. This two-bit field controls the mode of the device:
FIELD VALUE
FUNCTION
00
Power Down
01
Reserved
10
Run a single ADC cycle and return to PowerDown
11
Normal Operation
Configuration Register (0x01)
The configuration register controls the integration timer and power saving enabling through two user fields.
Table 4. Configuration Register
7
6
5
4
Reserved
CONFIG
3
2
1
PSAVESKIP Reserved
0
TCNTRL
Reset
0x00
FIELD
BITS
Reserved
7:4
PSAVESKIP
3
PowerSave Mode. When asserted, the power save states are skipped following a light integration cycle
for shorter sampling rates (Note A).
Reserved
2
Reserved. Write as 0.
TCNTRL
1:0
DESCRIPTION
Reserved. Write as 0.
Timer Control sets the integration time.
FIELD VALUE
MULTIPLIER
00
1×
Tint = 400 ms
PURPOSE
01
2×
Tint = 200 ms
10
4×
Tint = 100 ms
11
−−
Reserved
NOTES: A. When PSAVESKIP = 0, the typical total cycle time is Tint + (60/MULTIPLIER) ms. When PSAVESKIP = 1, the typical total cycle
time is Tint.
The LUMENOLOGY r Company
Copyright E 2011, TAOS Inc.
r
r
www.taosinc.com
9
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
ALS Data Registers (0x04 − 0x05)
The ADC data is expressed as a 16-bit word stored in two 8-bit registers. The read-only ADC data registers
DATALOW and DATAHIGH provide the low and high bytes, respectively, of the 16-bit ADC conversion value.
The conversion value translates directly to units of lux.
Table 5. ALS Data Registers
REGISTER
ADDRESS
BITS
DATALOW
0x04
7:0
ADC conversion low byte
DESCRIPTION
DATAHIGH
0x05
7:0
ADC conversion high byte
ID Register (0x0A)
The ID register is a read-only register that provides the value for the part number. The PARTNO field indicates
the part number of each device given in the Available Options section and will remain constant.
Table 6. ID Register
7
6
4
3
PARTNO
CONTROL
FIELD
5
BITS
Reserved
7:4
3:0
1
0
Reset
ID
Reserved
DESCRIPTION
FIELD VALUE
PARTNO
2
DEVICE PART NUMBER
1000
TSL45317
1001
TSL45313
1010
TSL45315
1011
TSL45311
Reserved
The ID register is useful for validating the device type and for verifying the functionality of the interface. When
used for this purpose, it is recommended that the Reserved field be masked out as follows:
Value = ID AND 0xF0, where AND represents a bit-wise AND function
Copyright E 2011, TAOS Inc.
The LUMENOLOGY r Company
r
r
10
www.taosinc.com
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
HARDWARE APPLICATION INFORMATION
Power Supply Decoupling
The power supply lines must be decoupled with a 0.1-μF capacitor placed as close to the device package as
possible. The bypass capacitor should have low effective series resistance (ESR) and effective series
inductance (ESI), such as the common ceramic types, which provide a low impedance path to ground at high
frequencies to handle transient currents caused by internal logic switching.
PCB Pad Layout
Suggested PCB pad layout guidelines for the CL package is shown in Figure 8.
0.95
0.70
0.55
1.2
0.85
1.35
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
Figure 8. Suggested CL Package PCB Layout
The LUMENOLOGY r Company
Copyright E 2011, TAOS Inc.
r
r
www.taosinc.com
11
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
PACKAGE INFORMATION
PACKAGE CL
ChipLED
TOP VIEW
PIN OUT
TOP VIEW
0.277 Nominal
Pin 1
0.277
Nominal
VDD 1
4 SCL
GND 2
3 SDA
2.0 0.1
2.0 0.1
Photodiode Array Area
END VIEW
0.3 Min
0.7
0.1
BOTTOM VIEW
CL of Solder Contacts and Photodiode
Array Area (Note B)
1.35
0.60
CL of Solder Contacts and Photodiode
Array Area (Note B)
0.30
Pin 1
(Note E)
1.2
0.10
0.15
Pb
0.45
NOTES: A. All linear dimensions are in millimeters.
B. The die is offset within the package to center the photodiode array to the solder contacts within a tolerance of ± 50 μm.
C. Package top surface is molded with an electrically nonconductive yellow clear plastic compound having an index of refraction
of 1.55.
D. Contact finish is copper alloy A194 with pre-plated NiPdAu lead finish.
E. Bottom pin 1 indicator is electrically connected to pin 1.
F. This package contains no lead (Pb).
G. This drawing is subject to change without notice.
Figure 9. Package CL — ChipLED Packaging Configuration
Copyright E 2011, TAOS Inc.
The LUMENOLOGY r Company
r
r
12
www.taosinc.com
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
CARRIER TAPE AND REEL INFORMATION
TOP VIEW
2.00 0.05
1.75
4.00
1.50
4.00
B
+ 0.30
8.00
− 0.10
3.50 0.05
1.00
0.25
A
B
A
DETAIL B
DETAIL A
5 Max
5 Max
0.254
0.02
2.18 0.05
NOTES: A.
B.
C.
D.
E.
F.
G.
2.18 0.05
0.83 0.05
Ao
Bo
Ko
All linear dimensions are in millimeters. Dimension tolerance is ± 0.10 mm unless otherwise noted.
The dimensions on this drawing are for illustrative purposes only. Dimensions of an actual carrier may vary slightly.
Symbols on drawing Ao, Bo, and Ko are defined in ANSI EIA Standard 481−B 2001.
Each reel is 178 millimeters in diameter and contains 3500 parts.
TAOS packaging tape and reel conform to the requirements of EIA Standard 481−B.
In accordance with EIA standard, device pin 1 is located next to the sprocket holes in the tape.
This drawing is subject to change without notice.
Figure 10. Package CL Carrier Tape
The LUMENOLOGY r Company
Copyright E 2011, TAOS Inc.
r
r
www.taosinc.com
13
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
SOLDERING INFORMATION
The CL package has been tested and has demonstrated an ability to be reflow soldered to a PCB substrate.
The solder reflow profile describes the expected maximum heat exposure of components during the solder
reflow process of product on a PCB. Temperature is measured on top of component. The components should
be limited to a maximum of three passes through this solder reflow profile.
Table 7. Solder Reflow Profile
PARAMETER
REFERENCE
DEVICE
Average temperature gradient in preheating
2.5°C/sec
Soak time
tsoak
2 to 3 minutes
Time above 217°C (T1)
t1
Max 60 sec
Time above 230°C (T2)
t2
Max 50 sec
Time above Tpeak −10°C (T3)
t3
Max 10 sec
Peak temperature in reflow
Tpeak
260° C
Temperature gradient in cooling
Tpeak
Max −5°C/sec
Not to scale — for reference only
T3
T2
Temperature (C)
T1
Time (sec)
t3
t2
tsoak
t1
Figure 11. Solder Reflow Profile Graph
Copyright E 2011, TAOS Inc.
The LUMENOLOGY r Company
r
r
14
www.taosinc.com
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
STORAGE INFORMATION
Moisture Sensitivity
Optical characteristics of the device can be adversely affected during the soldering process by the release and
vaporization of moisture that has been previously absorbed into the package. To ensure the package contains
the smallest amount of absorbed moisture possible, each device is baked prior to being dry packed for shipping.
Devices are dry packed in a sealed aluminized envelope called a moisture-barrier bag with silica gel to protect
them from ambient moisture during shipping, handling, and storage before use.
Shelf Life
The calculated shelf life of the device in an unopened moisture barrier bag is 12 months from the date code on
the bag when stored under the following conditions:
Shelf Life: 12 months
Ambient Temperature: < 40°C
Relative Humidity: < 90%
Rebaking of the devices will be required if the devices exceed the 12 month shelf life or the Humidity Indicator
Card shows that the devices were exposed to conditions beyond the allowable moisture region.
Floor Life
The CL package has been assigned a moisture sensitivity level of MSL 3. As a result, the floor life of devices
removed from the moisture barrier bag is 168 hours from the time the bag was opened, provided that the devices
are stored under the following conditions:
Floor Life: 168 hours
Ambient Temperature: < 30°C
Relative Humidity: < 60%
If the floor life or the temperature/humidity conditions have been exceeded, the devices must be rebaked prior
to solder reflow or dry packing.
Rebaking Instructions
When the shelf life or floor life limits have been exceeded, rebake at 50°C for 12 hours.
The LUMENOLOGY r Company
Copyright E 2011, TAOS Inc.
r
r
www.taosinc.com
15
TSL4531
DIGITAL AMBIENT LIGHT SENSOR
TAOS112 − OCTOBER 2011
PRODUCTION DATA — information in this document is current at publication date. Products conform to
specifications in accordance with the terms of Texas Advanced Optoelectronic Solutions, Inc. standard
warranty. Production processing does not necessarily include testing of all parameters.
LEAD-FREE (Pb-FREE) and GREEN STATEMENT
Pb-Free (RoHS) TAOS’ terms Lead-Free or Pb-Free mean semiconductor products that are compatible with the current
RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous
materials. Where designed to be soldered at high temperatures, TAOS Pb-Free products are suitable for use in specified
lead-free processes.
Green (RoHS & no Sb/Br) TAOS defines Green to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and
Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material).
Important Information and Disclaimer The information provided in this statement represents TAOS’ knowledge and
belief as of the date that it is provided. TAOS bases its knowledge and belief on information provided by third parties,
and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate
information from third parties. TAOS has taken and continues to take reasonable steps to provide representative
and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and
chemicals. TAOS and TAOS suppliers consider certain information to be proprietary, and thus CAS numbers and other
limited information may not be available for release.
NOTICE
Texas Advanced Optoelectronic Solutions, Inc. (TAOS) reserves the right to make changes to the products contained in this
document to improve performance or for any other purpose, or to discontinue them without notice. Customers are advised
to contact TAOS to obtain the latest product information before placing orders or designing TAOS products into systems.
TAOS assumes no responsibility for the use of any products or circuits described in this document or customer product
design, conveys no license, either expressed or implied, under any patent or other right, and makes no representation that
the circuits are free of patent infringement. TAOS further makes no claim as to the suitability of its products for any particular
purpose, nor does TAOS assume any liability arising out of the use of any product or circuit, and specifically disclaims any
and all liability, including without limitation consequential or incidental damages.
TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS, INC. PRODUCTS ARE NOT DESIGNED OR INTENDED FOR
USE IN CRITICAL APPLICATIONS IN WHICH THE FAILURE OR MALFUNCTION OF THE TAOS PRODUCT MAY
RESULT IN PERSONAL INJURY OR DEATH. USE OF TAOS PRODUCTS IN LIFE SUPPORT SYSTEMS IS EXPRESSLY
UNAUTHORIZED AND ANY SUCH USE BY A CUSTOMER IS COMPLETELY AT THE CUSTOMER’S RISK.
LUMENOLOGY, TAOS, the TAOS logo, and Texas Advanced Optoelectronic Solutions are registered trademarks of Texas Advanced
Optoelectronic Solutions Incorporated.
Copyright E 2011, TAOS Inc.
The LUMENOLOGY r Company
r
r
16
www.taosinc.com