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参数资料
| 型号： | ISL29012IROZ-EVALZ |
| 厂商： | Intersil |
| 文件页数： | 9/15页 |
| 文件大小： | 0K |
| 描述： | EVALUATION BOARD ISL29012IROZ |
| 标准包装： | 1 |
| 传感器类型： | 灯光，数字式输出 |
| 传感范围： | 128000Lux |
| 接口： | I²C，SM 总线 |
| 灵敏度： | 540nm |
| 电源电压： | 2.5 V ~ 3.3 V |
| 嵌入式： | 否 |
| 已供物品： | 板 |
| 已用 IC / 零件： | ISL29012 |
ISL29003
saturation (Figure 17). When using the ISL29012 in high lux
applications, one can reduce the R EXT value and select
Range4, the lowest gain to avoid saturation. For example,
.
WINDOW LENS
R EXT = 25k Ω is recommended with ambient light near
100,000 lux. If you are operating the ISL29012 at a lower
range/higher gain and detect a zero output, the firmware
should change the range and recheck the ALS count. One of
?
t
D1
D TOTAL
two situations will be identified. If the output is non-zero, the
ISL29012 is saturated. If the output remains zero, the
ISL29012 is in a totally dark environment.
ALS Range For Various Light Sources
ISL29012
D LENS
Figure 8 shows spectrum response of various light sources.
Fluorescent has little IR content while sunlight, halogen and
E=
DATA
2 15
x 2000
? = VIEWING ANGLE
incandescent light have large IR content. Since both the
internal photo diodes D1 and D2 are sensitive to IR
spectrum, they saturate at a higher level for the fluorescent
light source in comparison to the other 3 light sources. This
FIGURE 4. FLAT WINDOW LENS
TABLE 14. RECOMMENDED DIMENSIONS FOR A FLAT
WINDOW DESIGN
effect is shown in Figure 21.
Unstable Ambient Light Condition
The ISL29012 sequentially measures the difference in the
output of two diodes. That's suitable since most changes in
ambient light are gradual and any difference between the
ambient light conditions for D1 and D2 are negligible.
However, it is possible to cause an abrupt change in
brightness with a fast-moving hand over the sensor or
D TOTAL
1.5
2.0
2.5
3.0
3.5
D1
0.50
1.00
1.50
2.00
2.50
D LENS @ 35°
VIEWING ANGLE
2.25
3.00
3.75
4.30
5.00
D LENS @ 45°
VIEWING ANGLE
3.75
4.75
5.75
6.75
7.75
passing a tree shadow in a fast moving car. To handle these
anomalies, we suggest comparing several sequential
readings and discarding any data with sudden changes.
Flat Window Lens Design
t=1
d1
D LENS
d TOTAL
Thickness of lens
Distance between ISL29012 and inner edge of lens
Diameter of lens
Distance constraint between the ISL29012 and lens
outer edge
A window lens will surely limit the viewing angle of the
ISL29012. The window lens should be placed directly on top
of the device. The thickness of the lens should be kept at
minimum to minimize loss of power due to reflection and
also to minimize loss of loss due to absorption of energy in
the plastic material. A thickness of t = 1mm is recommended
for a window lens design. The bigger the diameter of the
window lens the wider the viewing angle is of the ISL29012.
Table 14 shows the recommended dimensions of the optical
window to ensure both 35° and 45° viewing angle. These
dimensions are based on a window lens thickness of 1.0mm
and a refractive index of 1.59.
9
* All dimensions are in mm.
Suggested PCB Footprint
It is important that the users check the “Surface Mount
Assembly Guidelines for Optical Dual FlatPack No Lead
(ODFN) Package” before starting ODFN product board
mounting.
Layout Considerations
The ISL29012 is relatively insensitive to layout. Like other
I 2 C devices, it is intended to provide excellent performance
even in significantly noisy environments. There are only a
few considerations that will ensure best performance.
Route the supply and I 2 C traces as far as possible from all
sources of noise. Use one 0.01μF power-supply decoupling
capacitor, placed close to the device.
FN6476.2
November 17, 2011
相关PDF资料 |
PDF描述 |
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| ISL29013IROZ-EVALZ | EVALUATION BOARD FOR ISL29013 |
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| ISL29012IROZ-T7 | 功能描述:IC SENSOR LIGHT-DGTL I2C 6-ODFN RoHS:是 类别:传感器，转换器 >> 光学 - 光电探测器 - 环境光传感器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 产品变化通告:Product Discontinuation 25/Jun/2012 标准包装:2,500 系列:- 带接近传感器:无 波长:- 电源电压:1.7 V ~ 2 V 电流 - 暗（标准）:- 电流 - 光（典型值）:- 输出类型:数字 - I²C 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UDFN 裸露焊盘 包装:带卷 (TR) |
| ISL29013IROZ | 制造商:Intersil Corporation 功能描述:Light-To-Digital Sens,ISL29013IROZ |
| ISL29013IROZ-EVALZ | 功能描述:EVALUATION BOARD FOR ISL29013 RoHS:是 类别:编程器，开发系统 >> 评估板 - 传感器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
| ISL29013IROZ-T7 | 功能描述:光学数位转换器 ISL29013IROZ LIGHT- TO-DIGTL OUTPUT SNSR RoHS:否 制造商:ams 数据总线宽度: 峰值波长:470 nm 最大工作频率: 工作电源电压: 工作电流: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:Chipscale-6 封装:Reel |
| ISL29015IROZ-EVALZ | 功能描述:EVALUATION BOARD FOR ISL29015 RoHS:是 类别:编程器，开发系统 >> 评估板 - 传感器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
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