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ISL29120 の電気的特性と機能

ISL29120のメーカーはIntersilです、この部品の機能は「Light Sensor」です。


製品の詳細 ( Datasheet PDF )

部品番号 ISL29120
部品説明 Light Sensor
メーカ Intersil
ロゴ Intersil ロゴ 




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ISL29120 Datasheet, ISL29120 PDF,ピン配置, 機能
Digital Output, Low Power, Red, Green, and Blue Color
Light Sensor
ISL29120
The ISL29120 is a low power, high sensitivity, integrated red,
green, and blue light sensor with an I2C (SMBus Compatible)
interface. Its state-of-the-art photodiode array provides an
accurate red, green and blue spectral response. The ADC is
capable of rejecting 50Hz and 60Hz flicker caused by artificial
light sources. A selectable range allows the user to optimize
sensitivity suitable for the specific application.
ISL29120 is optimized for sensing red, green and blue light
components in an non-infrared environment (fluorescent and
LED lighting). When operating in infrared rich environments, an
external IR blocking filter should be used for accurate
measurements.
In normal continuous operation, the ISL29120 power
consumption is 70µA, which reduces to 0.3µA in power down
mode. In polling mode, the auto-power-down function shuts down
most of the device after each ADC conversion.
The ISL29120 supports both hardware and software interrupts.
The interrupt thresholds are user programmable. The Interrupt
persistency feature reduces false trigger notification.
Designed to operate on supplies from 2.25V to 3.3V and I2C supply
from 1.7V to 3.6V, the ISL29120 is specified for operation over the
-40°C to +85°C ambient temperature range.
Features
• 70µA Operating Current, 0.3µA Shutdown Current
• I2C (SMBus Compatible) Output
• Programmable 4, 8, 12 or 16-bits ADC Resolution
• Programmable Interrupt Windows
• Two Optical Sensitivity Ranges
• 2.25 to 3.63V Operating Power Supply
• 1.7V to 3.6V Supply for I2C Interface
• 2.0mmx2.1mmx0.7mm 6 Ld ODFN 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
VDD_PULLUP
SMBMaster
INT
SDA
SCL
VDD
R2
100
4
6
5
INT
SDA
SCL
VDD
REXT
GND
1
3
2
PULL-UP RESISTORS
2.7kTO 10k
ISL29120
R1
499k
C1
1µF
FIGURE 1. TYPICAL APPLICATION
0.5
RED SENSOR
0.4 BLUE SENSOR
0.3
0.2
0.1
0 GREEN SENSOR
300 400 500 600 700 800 900 1000 1100
WAVELENGTH (nm)
FIGURE 2. RELATIVE SPECTRAL SENSITIVITY FOR RED, GREEN AND
BLUE SENSE MODES
May 29, 2012
FN8314.0
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 Inc. 2012. 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.
Free Datasheet http://www.datasheet4u.com/

1 Page





ISL29120 pdf, ピン配列
ISL29120
Absolute Maximum Ratings (TA = +25°C)
VI2DCDB, Suusp(SpClyLV, oSlDtaAg)ePbinetVwoelteangeV.D.D.
and
....
GND
....
.
.
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.
.
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.
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.
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........
-0.2V to
4.0V
4.0V
I2C Bus (SCL, SDA) Pin Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <10mA
REXT Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.2V to VDD+0.5V
ESD Rating
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2kV
Thermal Information
Thermal Resistance (Typical)
θJA (°C/W)
6 Ld ODFN Package (Note 4) . . . . . . . . . . . . . . . . . . . . .
62
Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +90°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
4. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief TB379.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise
noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA
Electrical Specifications VDD = 3V, TA = +25°C, REXT = 499k1% tolerance, 16-bit ADC operation, unless otherwise specified.
PARAMETER
DESCRIPTION
CONDITION
MIN
(Note 5)
TYP
MAX
(Note 5) UNIT
VDD Power Supply Range
IDD Supply Current
IDD1 Supply Current when Software disabled or auto power-down
Powered Down
VI2C Supply Voltage Range for I2C
Interface
2.25
70
0.01
1.7
3.63 V
85 µA
0.3 µA
3.63 V
tint
FI2C
DATA_0
ADC Conversion Time
I2C Clock Rate Range
Dark Count
16-bit ADC data
Range Setting = 0; ADC Resolution 16 Bits
90 ms
400 kHz
1 5 Counts
DATA_FS
DATA_Red
Full Scale ADC Code
Red Count
DATA_Green Green Count
DATA_Blue Blue Count
ADC Resolution 16 Bits
Range = 0; λ = 640nm; Irradiance 155 µW/cm2
Range = 1; λ = 640nm; Irradiance 155 µW/cm2
Range = 0; λ = 530nm; Irradiance 212 µW/cm2
Range = 1; λ = 530nm; Irradiance 212 µW/cm2
Range = 0; λ = 470nm; Irradiance 215 µW/cm2
Range = 1; λ = 470nm; Irradiance 215 µW/cm2
15000
15000
15000
20000
4350
20000
4350
20000
4350
65535
25000
25000
25000
Counts
Counts
Counts
Counts
Counts
Counts
Counts
VREF
VIL
Voltage at REXT Pin
SCL and SDA Input Low
Voltage
0.52 V
0.55 V
VIH SCL and SDA Input High
Voltage
1.25
V
ISDA SDA Current Sinking
Capability
45
mA
NOTES:
5. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
6. 640nm Red, 530nm Green and 470 nm Blue LEDs are used to generate a nominal count of 20000 for the Red, Green and Blue data output to characterize
part to part variation in production test.
3 FN8314.0
May 29, 2012
Free Datasheet http://www.datasheet4u.com/


3Pages


ISL29120 電子部品, 半導体
ISL29120
Data Registers (0x02 and 0x03)
ISL29120 has two 8-bit read-only registers to hold the LSByte
and MSByte data from the ADC. The most significant byte (MSB)
is accessed at address 0x03, and the least significant byte (LSB)
is accessed at address 0x02. For 16-bit resolution, the data is
from D0 to D15; for 12-bit resolution, the data is from D0 to D11;
for 8-bit resolution, the data is from D0 to D7. The registers are
refreshed after every conversion cycle.
TABLE 7. DATA REGISTERS
ADDRESS
CONTENTS
0x02
D0 is LSB for 4, 8, 12 or 16-bit resolution; D3 is MSB for
4-bit resolution; D7 is MSB for 8-bit resolution
0x03
D15 is MSB for 16-bit resolution; D11 is MSB for 12-bit
resolution
Interrupt Threshold Registers
Registers 0x04 and 0x05 set the low (LO) threshold for the
interrupt pin and the interrupt flag. Register 0x04 is the LSByte
and 0x05 is the MSByte. By default, the Interrupt threshold LO is
00 hex for both LSByte and MSByte.
Registers 0x06 and 0x07 set the high (HI) threshold for the
interrupt pin and the interrupt flag. Register 0x06 is the LSByte
and 0x07 is the MSByte. By default, the Interrupt threshold HI is
0xFF for both LSByte and MSByte.
Note that there is only one set of threshold registers as ISL29120
performs R, G and B conversions sequentially. If different
thresholds are required for each color, then these threshold
registers must be re-configured prior to issuing a convert start
command. If a common threshold setting for the R, G and B is
desired then the threshold register can be initialized at power-up.
Interrupt threshold registers should be programmed
appropriately for the selected ADC conversion resolution. For
example, for 12-bit mode, only the corresponding 12 bits of the
threshold registers must be programmed and the remaining bits
should be set to zero.
Interrupt Function
An interrupt event (IFLG) is indicated by 0x00[2]. The user must
clear this bit during the device initialization. The ISL29120 will
issue an interrupt indication by setting the IFLG bit if the count in
Register 0x02 and 0x03 are outside the user's programmed
window in interrupt threshold registers. Read Register 0x00 to
clear the interrupt flag. Interrupt flags should also be cleared
following a interrupt threshold configuration change.
An Interrupt persistency 0x01[1:0] option is available for interrupt
event control for the RGB ambient light measurement. Persistency
requires x-in-a-row interrupt flags before the INT pin is driven low.
The user must read Register 0x0 to clear the Interrupt.
Noise/Flicker Rejection
Integrating ADC’s provide excellent flicker/noise-rejection for
periodic sources whose frequency is an integer multiple of the
conversion rate. For instance, a 60Hz AC unwanted signal’s sum
from 0ms to k*16.66ms (k = 1,2...ki) is zero. Similarly, setting
the device’s integration time to be an integer multiple of the
periodic noise signal significantly improves the light sensor
output signal in the presence of noise.
Typical Application Circuit
A typical application for the ISL29120 is shown in Figure 6. The
ISL29120’s I2C address is internally hardwired as 1000110x.
The device can be connected to a system’s I2C bus with other I2C
compliant devices.
VDD_PULLUP
SMBMaster
INT
SDA
SCL
VDD
R2
100
4
6
5
INT
SDA
SCL
VDD
REXT
GND
1
3
2
PULL-UP RESISTORS
2.7kTO 10k
ISL29120
R1
499k
C1
1µF
FIGURE 6. ISL29120 TYPICAL APPLICATION CIRCUIT
Suggested PCB Footprint
It is important that users check the “Surface Mount Assembly
Guidelines for Optical Dual FlatPack No Lead (ODFN) Package”
before starting ODFN product board mounting.
http://internal.intersil.com/content/dam/Intersil/documents/tb
47/tb477.pdf
PCB Layout Considerations
The ISL29120 is relatively insensitive to PCB layout. There are
only a few considerations that will ensure best performance.
Route the supply and I2C traces away from sources of digital
switching noise. Use a 1µF power-supply decoupling capacitors
close to the device. A series resistor in the power supply to isolate
switching noise elsewhere in the system is recommended. The
499kresistor should be placed close to the device and away from
any noise sources.
Soldering Considerations
Convection heating is recommended for reflow soldering;
direct-infrared heating is not recommended. The plastic ODFN
package does not require a custom reflow soldering profile, and
is qualified to +260°C. A standard reflow soldering profile with a
+260°C maximum is recommended.
RGB Spectral Sensitivity
Typical spectral response of the ISL29120’s Red, Green and Blue
channels is shown in Figure 2. It should be observed that there is
a considerable cross-spectral sensitivity among three colors. In
addition, all three channels have a strong sensitivity to light in
infra-red spectrum.
It is therefore imperative that the a color sense system-based on
ISL29120 be calibrated for the desired application using a
mathematical model to compensate for the cross-spectral
coupling between the Red, Green and Blue channels.
For operation in infra-red rich environments, such as sunlight or
incandescent lighting, use of an external Infrared filter is required
for meaningful spectral color sensing.
6 FN8314.0
May 29, 2012
Free Datasheet http://www.datasheet4u.com/

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共有リンク

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部品番号部品説明メーカ
ISL29120

Light Sensor

Intersil
Intersil
ISL29125

Digital Red and Green and Blue Color Light Sensor

Intersil
Intersil


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