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PDF TSL2572 Data sheet ( Hoja de datos )
| Número de pieza | TSL2572 | |
| Descripción | LIGHT-TO-DIGITAL CONVERTER | |
| Fabricantes | TAOS | |
| Logotipo |  |
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Features
D Ambient Light Sensing (ALS)
− Approximates Human Eye Response
− Programmable Analog Gain and
Integration Time
− 45,000,000:1 Dynamic Range
− Operation to 60,000 lux in Sunlight
− Very High Sensitivity — Ideally Suited for
Operation Behind Dark Glass
− Package UV Rejection Filter
D Maskable Interrupt
− Programmable Upper and Lower
Thresholds with Persistence Filter
D Wait Timer and Power Management
− Low Power 2.2 mA Sleep State with User-
Selectable Sleep-After-Interrupt Mode
− 90 mA Wait State with Programmable Wait
Time from 2.7 ms to > 8 seconds
D I2C Fast Mode Compatible Interface
− Data Rates up to 400 kbit/s
− Input Voltage Levels Compatible with VDD
or 1.8-V Bus
D Register Set- and Pin-Compatible with the
TSL2x71 Series
D Small 2 mm y 2 mm Dual Flat No-Lead (FN)
Package
TSL2572
LIGHT-TO-DIGITAL CONVERTER
TAOS132 − MARCH 2012
PACKAGE FN
DUAL FLAT NO-LEAD
(TOP VIEW)
VDD 1
SCL 2
GND 3
6 SDA
5 INT
4 NC
Not Actual Size
Applications
D Display Backlight Control
D Keyboard Illumination Control
D Solid State Lighting Control for Daylight
Harvesting
D Printer Paper Detection
End Products and Market Segments
D Mobile Handsets, Tablets, Laptops,
Monitors and TVs, Portable Media Players
D Medical and Industrial Instrumentation
D White Goods
D Toys
D Industrial/Commercial Lighting
D Digital Signage
D Printers
Description
The TSL2572 device family provides ambient light sensing (ALS) that approximates human eye response to
light intensity under a variety of lighting conditions and through a variety of attenuation materials. Accurate ALS
measurements are the result of TAOS’ patented dual-diode technology and the UV rejection filter incorporated
in the package. In addition, the operating range is extended to 60,000 lux in sunlight when the low-gain mode
is used.
While useful for general purpose light sensing, the TSL2572 device is particularly useful for display
management to provide optimum viewing in diverse lighting conditions while extending battery life. The
TSL2572 device family is ideally suited for use in mobile handsets, TVs, tablets, monitors, and portable media
players where the display backlight may account for 50% to 70% of the system power consumption.
The LUMENOLOGY r Company
r
Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road S Suite 300 S Plano, TX 75074 S (972r) 673-0759
www.taosinc.com
Copyright E 2012, TAOS Inc.
1
1 page  
TSL2572
LIGHT-TO-DIGITAL CONVERTER
TAOS132 − MARCH 2012
Wait Characteristics, VDD = 3 V, TA = 255C, WEN = 1 (unless otherwise noted)
PARAMETER
TEST CONDITIONS
CHANNEL
MIN
Wait step size
WTIME = 0xFF
2.58
Wait number of integration steps (Note 1)
1
TYP
2.73
NOTE 1: Parameter ensured by design and is not tested.
MAX
2.9
256
UNIT
ms
steps
AC Electrical Characteristics, VDD = 3 V, TA = 255C (unless otherwise noted)
PARAMETER†
TEST CONDITIONS
MIN
f(SCL)
Clock frequency (I2C only)
0
t(BUF)
Bus free time between start and stop condition
1.3
t(HDSTA)
Hold time after (repeated) start condition. After
this period, the first clock is generated.
0.6
t(SUSTA)
Repeated start condition setup time
t(SUSTO) Stop condition setup time
t(HDDAT)
Data hold time
t(SUDAT)
Data setup time
t(LOW)
SCL clock low period
t(HIGH)
SCL clock high period
tF Clock/data fall time
tR Clock/data rise time
Ci Input pin capacitance
† Specified by design and characterization; not production tested.
0.6
0.6
0
100
1.3
0.6
TYP MAX UNIT
400 kHz
μs
μs
μs
μs
μs
ns
μs
μs
300 ns
300 ns
10 pF
PARAMETER MEASUREMENT INFORMATION
SCL
t(BUF)
SDA
t(LOW)
t(R)
VIH
VIL
t(HDSTA)
t(HDDAT)
VIH
VIL
t(F)
t(HIGH) t(SUSTA)
t(SUDAT)
P
Stop
Condition
S
Start
Condition
S
Figure 1. Timing Diagrams
t(SUSTO)
P
The LUMENOLOGY r Company
r
www.taosinc.com
r
Copyright E 2012, TAOS Inc.
5
5 Page 
TSL2572
LIGHT-TO-DIGITAL CONVERTER
TAOS132 − MARCH 2012
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 10).
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 Acknowledge (0)
N Not Acknowledged (1)
P Stop Condition
R Read (1)
S Start Condition
Sr Repeated Start Condition
W Write (0)
... Continuation of protocol
Master-to-Slave
Slave-to-Master
17
S Slave Address
11
WA
8
Command Code
1
A
I2C Write Protocol
8
Data Byte
11
A ... P
17
S Slave Address
11
RA
8
Data
1
A
I2C Read Protocol
8
Data
17
S Slave Address
11
WA
8
Command Code
11
A Sr
7
Slave Address
11
RA
8
Data
1
A
I2C Read Protocol — Combined Format
Figure 10. I2C Protocols
11
A ... P
8 11
Data A ... P
The LUMENOLOGY r Company
r
www.taosinc.com
r
Copyright E 2012, TAOS Inc.
11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet TSL2572.PDF ] | |
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