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PDF TCS3490 Data sheet ( Hoja de datos )
| Número de pieza | TCS3490 | |
| Descripción | Color Light-to-Digital Converter | |
| Fabricantes | ams | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TCS3490 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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TCS3490
Color Light-to-Digital Converter
General Description
The TCS3490 device provides color and IR (red, green, blue, clear
and IR) light sensing. The color sensing provides for improved
accuracy lux and color temperature measurements typically
used to adjust the backlight intensity and correct the display
color gamut. Additionally it can be used for light source type
detection as it reports the IR content of the light.
For further understanding in regards to the contents of the
datasheet, please refer to the Reference Guide located at the end
of the document.
Figure 1:
Added Value of Using TCS3490
Key Benefits & Features
The benefits and features of TCS3490, Color Light-to-Digital
Converter are listed below:
Benefits
Features
Single Device Integrated Optical Solution
• RGBC and ALS Support
• Power Management Features
Color Temperature and Ambient Light Sensing
• Programmable Gain & Integration Time
• 1,000,000:1 Dynamic Range
Equal Response to 360 degree Incident Light Circular Segmented RGBC Photodiode
Ideal for Operation Behind Dark Glass
Very High Sensitivity
Light Source Detection
RGBC + IR sensor
ams Datasheet, Confidential: 2013-Nov [1-02]
TCS3490 – 1
1 page  
Electrical Characteristics
Electrical Characteristics
Figure 6:
Recommended Operating Conditions
All limits are guaranteed. The parameters with min and max
values are guaranteed with production tests or SQC (Statistical
Quality Control) methods.
Symbol
VDD
TA
Parameter
Supply voltage
Operating free-air temperature (1)
Min Typ Max Units
2.7 3 3.6 V
-40 70 °C
Note(s) and/or Footnote(s):
1. While the device is operational across the temperature range, functionality will vary with temperature. Specifications are stated at
25°C unless otherwise noted.
Figure 7:
Operating Characteristics, VDD=3V, TA=25ºC (unless otherwise noted)
Symbol
Parameter
Conditions
Min Typ Max Units
IDD Supply current
Active
Wait state
Sleep state - no I²C activity
235 330
60
1.0 10
μA
VOL
INT, SDA output low
voltage
3 mA sink current
6 mA sink current
0
0
0.4
V
0.6
ILEAK
Leakage current, SDA,
SCL, INT pins
Leakage current, LDR pins
-5 5 μA
-10 10 μA
VIH
SCL, SDA input high
voltage
TCS34901, TCS34905
TCS34903, TCS34907
0.7 VDD
1.26
V
VIL
SCL, SDA input low
voltage
TCS34901, TCS34905
TCS34903, TCS34907
0.3 VDD
0.54
V
ams Datasheet, Confidential: 2013-Nov [1-02]
TCS3490 – 5
5 Page 
Functional Description
Functional Description
Communication with the device is
accomplished through a fast (up to 400
kHz) two wire I²C serial bus for easy
connection to a microcontroller or
embedded controller. The device
typically draws only 235μA in color
operation and 1uA during power down.
The TCS3490 device provides ambient light sensing and color
temperature sensing. The internal state machine manages the
operation of the device. It controls the ALS functionality and
power down modes. Average power consumption is managed
via control of variable endurance low power wait cycles.
The interrupt feature improves system efficiency by eliminating
the need to poll the sensor. Three interrupt sources (ALS, ALS
saturation) can activate the open drain output pin. Each
interrupt source is enabled independently. ALS interrupts
appear when upper or lower thresholds are exceeded for a
consecutive number of sample readings.
The advanced digital color light sensor portion of the TCS3490
contains a segmented circular photodiode array used for color
measurements. This architecture provides stable color sensing
independent of the incident angle of light. Four integrating
analog-to-digital converters (ADCs) integrate light energy from
photodiodes simultaneously. The advanced digital color light
sensor portion of the TCS3490 contains a segmented circular
photodiode array used for color measurements. This
architecture provides stable color sensing independent of the
incident angle of light. Four integrating analog-to-digital
converters (ADCs) integrate light energy from photodiodes
simultaneously.
Figure 17:
Simplified ALS State Machine
Sleep
PON = 1
(r0x80:b0)
PON = 0
(r0x80:b0)
Start
RGBC
Wait
ams Datasheet, Confidential: 2013-Nov [1-02]
TCS3490 – 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TCS3490.PDF ] | |
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