收藏本站
ISL29003
Pin Descriptions
PIN NUMBER
1
2
3
4
PIN NAME
VDD
GND
REXT
INT
DESCRIPTION
Positive supply; connect this pin to a regulated 2.5V to 3.3V supply.
Ground pin. The thermal pad is connected to the GND pin.
External resistor pin for ADC reference; connect this pin to ground through a (nominal) 100k Ω resistor with
1% tolerance.
Interrupt pin; LO for interrupt/alarming, open drain output.
5
6
SCL
SDA
I 2 C serial clock
I 2 C serial data
The I 2 C bus lines can be pulled above VDD, 5.5V max.
Principles of Operation
Photodiodes
The ISL29012 contains two photodiode arrays which convert
light into current. One diode (D1) is sensitive to both visible
and infrared light, while the other one (D2) is only sensitive to
infrared light; see Figure 20. Using the infrared portion of the
light as a baseline, the visible light can be extracted. The
ambient light output is the difference between D1 and D2. The
resultant ALS spectral response vs wavelength is shown in
Figure 6 in the “Typical Performance Curves” on page 11.
After light is converted to current during the light data process,
the current output is converted to digital by a single built-in
integrating type signed 15-bit Analog-to-Digital Converter
(ADC). An I 2 C command reads the visible light intensity in
counts.
The converter is a charge-balancing integrating type signed
15-bit ADC. The chosen method for conversion is best for
converting small current signals in the presence of an AC
periodic noise. A 100ms integration time, for instance, highly
rejects 50Hz and 60Hz power line noise simultaneously. See
“Integration Time or Conversion Time” on page 7 and “Noise
Rejection” on page 8.
The built-in ADC offers user flexibility in integration time or
conversion time. There are two timing modes: Internal Timing
Mode and External Timing Mode. In Internal Timing Mode,
integration time is determined by an internal dual speed
oscillator (f OSC ), and the n-bit (n = 4, 8, 12,16) counter inside
the ADC. In External Timing Mode, integration time is
determined by the time between two consecutive I 2 C External
Timing Mode commands. See “External Timing Mode” on
page 7. A good balancing act of integration time and resolution
depending on the application is required for optimal results.
The ADC has four I 2 C programmable range selects to
dynamically accommodate various lighting conditions. For
very dim conditions, the ADC can be configured at its lowest
range. For very bright conditions, the ADC can be configured
at its highest range.
3
Interrupt Function
The active low interrupt pin is an open drain pull-down
configuration. The interrupt pin serves as an alarm or
monitoring function to determine whether the ambient light
exceeds the upper threshold or goes below the lower
threshold. The user can also configure the persistency of the
interrupt pin. This helps to avoid false triggers, such as noise
or sudden spikes in ambient light conditions. An unexpected
camera flash, for example, can be ignored by setting the
persistency to 8 integration cycles.
I 2 C Interface
There are eight (8) 8-bit registers available inside the ISL29012.
The command and control registers define the operation of the
device. The command and control registers do not change until
the registers are overwritten. There are two 8-bit registers that
set the high and low interrupt thresholds. There are four 8-bit
data Read Only registers. Two bytes for the sensor reading and
another two bytes for the timer counts. The data registers
contain the ADC's latest digital output, and the number of clock
cycles in the previous integration period.
The ISL29012’s I 2 C interface slave address is hardwired
internally as 1000100. When 1000100x with x as R or W is
sent after a START condition, this device compares the first
7 bits of this byte to its address and matches.
Figure 1 shows a sample one-byte read. Figure 2 shows a
sample one-byte write. Figure 3 shows a sync_I 2 C timing
diagram sample for externally controlled integration time.
The I 2 C bus master always drives the SCL (clock) line, while
either the master or the slave can drive the SDA (data) line.
Figure 2 shows a sample write. Every I 2 C transaction begins
with the master asserting a start condition (SDA falling while
SCL remains high). The following byte is driven by the
master, and includes the slave address and read/write bit.
The receiving device is responsible for pulling SDA low
during the acknowledgement period.
Every I 2 C transaction ends with the master asserting a stop
condition (SDA rising while SCL remains high).
For more information about the I 2 C standard, please consult
the Phillips ? I 2 C specification documents.
FN6476.2
November 17, 2011
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
ISL29013IROZ-EVALZ EVALUATION BOARD FOR ISL29013
ISL29015IROZ-EVALZ EVALUATION BOARD FOR ISL29015
ISL29018IROZ-EVALZ EVALUATION BOARD FOR ISL29018
ISL29020IROZ-EVALZ EVALUATION BOARD FOR ISL29020
ISL29021IROZ-EVALZ EVAL BOARD FOR ISL29021IROZ
ISL29023IROZ-EVALZ EVALUATION BOARD ISL29023IROZ
ISL29028AIROZ-EVALZ BOARD EVALUATION FOR ISL29028
ISL29028IROZ-EVALZ EVAL BOARD FOR ISL29028IROZ
相关代理商/技术参数
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:-
ISL29015IROZ-T7 功能描述:图像传感器和彩色传感器 ISL29015IROZ AMBIENT INFRD LGHT TO DIGTL RoHS:否 制造商:Avago Technologies 类型:Color Sensors 工作电源电压:2.5 V 封装 / 箱体: 图象大小: 颜色读出:Color 最大工作温度:+ 70 C 最小工作温度:- 25 C 封装:Reel
ISL29018IROZ-EVALZ 功能描述:EVALUATION BOARD FOR ISL29018 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:-
ISL29018IROZ-T7 功能描述:IC SENSOR AMB LGT-DTGL I2C 8ODFN 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)