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PDF ISL29125 Data sheet ( Hoja de datos )
| Número de pieza | ISL29125 | |
| Descripción | Digital Red and Green and Blue Color Light Sensor | |
| Fabricantes | Intersil | |
| Logotipo |  |
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Digital Red, Green and Blue Color Light Sensor with IR
Blocking Filter
ISL29125
The ISL29125 is a low power, high sensitivity, RED, GREEN and
BLUE color light sensor (RGB) with an I2C (SMBus compatible)
interface. Its state-of-the-art photodiode array provides an
accurate RGB spectral response and excellent light source to
light source variation (LS2LS). The ISL29125 is designed to
reject IR in light sources allowing the device to operate in
environments from sunlight to dark rooms. The integrating
ADC rejects 50Hz and 60Hz flicker caused by artificial light
sources. A selectable range allows the user to optimize
sensitivity suitable for the specific application. In normal
operation mode the device consumes 56µA, which reduces to
0.5µA in power-down mode. The ISL29125 supports hardware
and software user programmable interrupt thresholds. The
Interrupt persistency feature reduces false trigger notification.
The device operates on supplies (VDD) from 2.25V to 3.63V, I2C
supply from 1.7V to 3.63V, and operating temperature over the
-40°C to +85°C.
Features
• 56µA operating current, 0.5µA shutdown current
• Selectable range (Via I2C)
• I2C (SMBus compatible) output
• ADC resolution 16 bits
• Programmable interrupt windows
• Two optical sensitivity ranges
- Range 0 = 5.7m lux to 375 lux
- Range 1 = 0.152 lux to 10,000 lux
• Operating power supply 2.25 to 3.63V
• I2C power supply 1.7V to 3.63V
• 6 Ld ODFN (1.65x1.65x0.7mm) package
Applications
• Smart phone, PDA, GPS, tablet PCs, LCD-TVs, digital picture
frames, digital cameras
• Dynamic display color balancing
• Printer color enhancement
• Industrial/commercial LED lighting color management
• Ambient light color detection/correction
• OLED display aging compensation
Related Literature
AN1914, “Evaluation Hardware/Software User Manual for RGB
Sensor”
Vbus
C1 C2
R1
VDD
SDA
R2 R3 R4
4 SDA
1
VDD
MCU SCL
6 SCL ISL29125 NC 2
GPIO
5 INT
R1 – 100 Ω
R2 – 2.7kΩ to 10kΩ
R3 – 2.7k Ω to 10kΩ
R4 – 2.7k Ω to 10kΩ
C1 – 1µF
C2 – 0.1µF
GND
3
FIGURE 1. TYPICAL APPLICATION DIAGRAM
2.0
1.8
NORMALIZED TO GREEN
1.6
1.4 RED
1.2 GREEN
BLUE
1.0
1931 STD RED
0.8 1931 STD GREEN
0.6 1931 STD BLUE
0.4
0.2
0.0
350 380 410 440 470 500 530 560 590 620 650 680 710 740 770 800 830
WAVELENGTH
FIGURE 2. NORMALIZED SPECTRAL RESPONSE FOR RED, GREEN
AND BLUE SENSING
January 24, 2014
FN8424.2
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2013, 2014. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
1 page  
SDA vs SCL Timing
tF
ISL29125
tHIGH
tLOW
tR
SCL
tSU:STA
SDA
(INPUT TIMING)
SDA
(OUTPUT TIMING)
tSU:DAT
tHD:STA
tHD:DAT
FIGURE 3. I2C BUS TIMING
tAA tDH
tHD:STO
tSU:STO
tBUF
SCL
SDA
8TH BIT OF LAST BYTE
ACK
STOP
CONDITION
FIGURE 4. I2C WRITE CYCLE TIMING
tWC
START
CONDITION
Typical Performance Curves
2.0
1.8
NORMALIZED TO GREEN
1.6
1.4 RED
1.2 GREEN
BLUE
1.0
1931 STD RED
0.8 1931 STD GREEN
0.6 1931 STD BLUE
0.4
0.2
0.0
350 380 410 440 470 500 530 560 590 620 650 680 710 740 770 800 830
WAVELENGTH
FIGURE 5. NORMALIZED SPECTRAL RESPONSE FOR AMBIENT
LIGHT SENSING
1.2
1.0
RED
0.8
GREEN
0.6
BLUE
0.4
0.2
0
-90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
ANGLE (°θ)
FIGURE 6. RADIATION PATTERN
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FN8424.2
January 24, 2014
5 Page 
.
B7
IR-COM
106
ISL29125
B6
RESERVED
100
90
80 0x80-0xBF-IR
70
60
B[5:0]
IR COMP ADJUST
50
B7 is ‘0’ or ‘1’
IR COMP OFFSET
40
30 0x00-0x3F
20
10
0
0 32 64 96 128 160 192 224 256
COMPENSATION REGISTER (0x02) SET VALUE (DECIMAL)
FIGURE 12. IR COMPENSATION SET
B5
ALSCC[5]
32
B4
ALSCC[4]
16
TABLE 9.
B3
ALSCC[3]
8
B2
ALSCC[2]
4
B1
ALSCC[1]
2
B0
ALSCC[0]
1
LIGHT-WEIGHT
Codes
NOTES:
11. A illuminant is intended to represent typical, domestic, tungsten-filament lighting. Its CCT is about 2856K.
12. D series of illuminants are constructed to represent natural daylight. D65 is used in lab to represent as noon light to test. Its CCT is 6504K.
13. F series of illuminants represent various types of fluorescent lighting. F2 is cool white fluorescent using in lab to test. Its CCT is 4230K.
Configuration-3 Register (Address: 0x03)
TABLE 10. CONFIGURATION-3
NAME
REGISTER ADDRESS
REGISTER BITS
DEFAULT ACCESS
DEC HEX
B7
B6
B5
B4 B3 B2
B1
B0
CONFIGURATION-3 3
0x03 RESERVED RESERVED RESERVED CONVEN PRST[1] PRST[0] INTSEL[1] INTSEL[0] 0x00 RW
INTERRUPT THRESHOLD ASSIGNMENT [B1:0]
The interrupt status bit (RGBTHF) bit0 at Reg0x08 is a status bit
for light intensity detection. The bit is set to logic HIGH when the
light intensity crosses the interrupt thresholds window (register
address 0x04 - 0x07) and set to logic LOW when its within the
interrupt thresholds window. Once the interrupt is triggered, the
INT pin goes low and the interrupt status bit goes HIGH until the
status bit is polled through the I2C read command. Both the INT
pin and the interrupt status bit are automatically cleared at the
end of the 8-bit Device Register byte (0x08) transfer. Table 11
shows selectable interrupt for the device.
TABLE 11. INTERRUPT STATUS
B1:0
INTERRUPT STATUS
00 No Interrupt
01 GREEN Interrupt
10 RED Interrupt
11 BLUE Interrupt
INTERRUPT PERSIST CONTROL [B3:2]
To minimize interrupt events due to 'transient' conditions, an
interrupt persistency option is available. IN the event of transient
condition an 'X-consecutive' number of interrupt must happen
before the interrupt flag and pint (INT) pin gets driven low. The
interrupt is active-low and remains asserted until the status
register (Addr: 0x08) is read to CLEAR the bit(s).
B3:2
00
01
10
11
TABLE 12. INTERRUPT PERSIST
NUMBER OF INTEGRATION CYCLE
1
2
4
8
RGB CONVERSION DONE TO INT CONTROL [B4]
TABLE 13.
B4 CONVERSION DONE
0 Disable
1 Enable
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January 24, 2014
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| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet ISL29125.PDF ] | |
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