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PDF TCS3471 Data sheet ( Hoja de datos )
| Número de pieza | TCS3471 | |
| Descripción | COLOR LIGHT-TO-DIGITAL CONVERTER | |
| Fabricantes | TAOS | |
| Logotipo |  |
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Features
D Color Light Sensing
− Programmable Analog Gain, Integration
Time, and Interrupt Function with Upper
and Lower Thresholds
− Resolution Up to 16 Bits
− Very High Sensitivity — Ideally Suited for
Operation Behind Dark Glass
− Up to 1,000,000:1 Dynamic Range
D Low Power Wait State
− 65 mA Typical Current
− Wait Timer is Programmable from 2.4 ms
to > 7 Seconds
D I2C Interface Compatible
− Up to 400 kHz (I2C Fast Mode)
D Dedicated Interrupt Pin
D Pin and Register Set Compatible with the
TCS3x7x Family of Devices
D Small 2 mm y 2.4 mm Dual Flat No-Lead
Package
D Sleep Mode — 2.5 mA Typical Current
TCS3471
COLOR LIGHT-TO-DIGITAL CONVERTER
TAOS115 − MARCH 2011
PACKAGE FN
DUAL FLAT NO-LEAD
(TOP VIEW)
VDD 1
SCL 2
GND 3
6 SDA
5 INT
4 NC
Package Drawing Not to Scale
Applications
D Color Temperature Sensing
D RGB LED Backlight Control
D Color Display Closed-Loop Feedback
Control
D Ambient Light Sensing for Display
Brightness Control
D Industrial Process Control
D Medical Diagnostics
End Products and Market Segments
D HDTVs, Mobile Handsets, Tablets, Laptops,
Monitors, PMP (Portable Media Payers)
D Medical Instrumentation
D Consumer Toys
D Industrial/Commercial Lighting
Description
The TCS3471 family of devices provides red, green, blue, and clear light sensing (RGBC) that detects light
intensity under a variety of lighting conditions and through a variety of attenuation materials. An internal state
machine provides the ability to put the device into a low power mode in between RGBC measurements providing
very low average power consumption.
The TCS3471 is directly useful in lighting conditions containing minimal IR content such as LED RGB backlight
control, reflected LED color sampler, or fluorescent light color temperature detector. With the addition of an IR
blocking filter, the device is an excellent ambient light sensor, color temperature monitor, and general purpose
color sensor.
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 2011, TAOS Inc.
1
1 page  
TCS3471
COLOR LIGHT-TO-DIGITAL CONVERTER
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
TAOS115 − MARCH 2011
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
SCL
S
Start
Stop
t(LOWSEXT)
SCLACK
SCLACK
t(LOWMEXT)
t(LOWMEXT)
t(LOWMEXT)
SDA
Figure 1. Timing Diagrams
t(SUSTO)
P
The LUMENOLOGY r Company
r
www.taosinc.com
r
Copyright E 2011, TAOS Inc.
5
5 Page 
TCS3471
COLOR LIGHT-TO-DIGITAL CONVERTER
TAOS115 − MARCH 2011
Register Set
The TCS3471 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. The register set is summarized in Table 1.
ADDRESS
−−
0x00
0x01
0x03
0x04
0x05
0x06
0x07
0x0C
0x0D
0x0F
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
RESISTER NAME
COMMAND
ENABLE
ATIME
WTIME
AILTL
AILTH
AIHTL
AIHTH
PERS
CONFIG
CONTROL
ID
STATUS
CDATA
CDATAH
RDATA
RDATAH
GDATA
GDATAH
BDATA
BDATAH
Table 1. Register Address
R/W REGISTER FUNCTION
W Specifies register address
R/W Enables states and interrupts
R/W RGBC ADC time
R/W Wait time
R/W RGBC interrupt low threshold low byte
R/W RGBC interrupt low threshold high byte
R/W RGBC interrupt high threshold low byte
R/W RGBC interrupt high threshold high byte
R/W Interrupt persistence filters
R/W Configuration
R/W Gain control register
R Device ID
R Device status
R Clear ADC low data register
R Clear ADC high data register
R Red ADC low data register
R Red ADC high data register
R Green ADC low data register
R Green ADC high data register
R Blue ADC low data register
R Blue ADC high data register
RESET VALUE
0x00
0x00
0xFF
0xFF
0x00
0x00
0x00
0x00
0x00
0x00
0x00
ID
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
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 the following read/write operations.
The LUMENOLOGY r Company
r
www.taosinc.com
r
Copyright E 2011, TAOS Inc.
11
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet TCS3471.PDF ] | |
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