- 您现在的位置：买卖IC网 > Datasheet目录450 > ISL29004IROZ-T7 (Intersil)IC SENSOR LIGHT-DGTL I2C 8-ODFN Datasheet资料下载
参数资料
| 型号： | ISL29004IROZ-T7 |
| 厂商： | Intersil |
| 文件页数： | 5/17页 |
| 文件大小： | 0K |
| 描述： | IC SENSOR LIGHT-DGTL I2C 8-ODFN |
| 产品培训模块： | Ambient Light Sensors |
| 标准包装： | 1 |
| 带接近传感器： | 无 |
| 波长： | 550nm |
| 电源电压： | 2.5 V ~ 3.3 V |
| 输出类型： | I²C? |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 其它名称： | ISL29004IROZ-T7DKR |
ISL29004
Principles of Operation
Photodiodes
The ISL29004 contain two photodiodes. Diode1 is sensitive
to both visible and intrared light, while Diode2 is mostly
sensitive to infrared light. The spectral response of the two
diodes are independent from one another. See Figure 7 in the
performance curves section. The photodiodes convert light to
current. Then, the diodes’ current outputs are converted to
digital by a single built-in integrating type 16-bit Analog-to-
Digital Converter (ADC). An I 2 C command mode determines
which photodiode will be converted to a digital signal. Mode0
is Diode1 only. Mode1 is Diode2 only. Mode3 is a sequential
Mode0 and Mode1 with an internal subtract function (Diode1 -
Diode2). Analog-to-Digital Converter.
The converter is a charge-balancing integrating type 16-bit
ADC. The chosen method for conversion is best for
converting small current signals in the presense of an AC
periodic noise. A 100ms integration time, for instance, highly
rejects 50Hz and 60Hz power line noise simultaneously. See
Integration Time and Noise Rejection section.
The built-in ADC offers user flexibility in integration time or
conversion time. Two timing modes are available. Internal
Timing Mode and External Timing Mode. In Internal Timing
Mode, integration time is determined by an internal dual speed
oscillator (fosc), 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 example. 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 select to
dynamically accomodate 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.
5
Interrupt Function
The active low interrupt pin is an open drain pull-down
configuration. The interrput 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 eliminates any 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
ISL29004. 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 ISL29004’s I 2 C interface slave address is pin-selectable
by pins A0 and A1. These pins can be tied or driven either
high or low. They comprise the least-significant two bits of
the I 2 C address, while the 5 most-significant bits are
hardwired as 100001{A1}{A0}. The four possible addresses
are therefore 44(hex) through 47(hex).
The ISL29003’s I 2 C interface slave address is hardwired
internally as 44(hex).
Figure 1 shows a sample one-byte read. Figure 2 shows a
sample one-byte write. Figure 3 shows a sync_iic 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.
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 Philips ? I 2 C specification documents.
FN6221.1
November 17, 2011
相关PDF资料 |
PDF描述 |
|---|---|
| ISL29027IROZ-T7 | IC SENSOR LIGHT-PROXIMITY 8ODFN |
| ISL29029IROZ-T7 | IC SENSOR LIGHT-PROXIMITY 8ODFN |
| ISL29033IROZ-T7 | IC PHOTO DETECTOR AMBIENT 6-ODFN |
| ISL29043IROMZ-T7 | IC SENSOR PROX/AMB LIGHT 10-ODFN |
| ISL29120IROZ-T7 | IC SENSOR LIGHT-DGTL I2C 6-ODFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL29006IROZ-EVALZ | 功能描述:EVALUATION BOARD FOR ISL29006 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:- |
| ISL29006IROZ-T7 | 功能描述:IC PHOTO DETECTOR AMBIENT 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) |
| ISL29007IROZ-EVALZ | 功能描述:EVALUATION BOARD FOR ISL29007 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:- |
| ISL29007IROZ-T7 | 功能描述:IC PHOTO DETECTOR AMBIENT 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) |
| ISL29008IROZ-EVALZ | 功能描述:EVALUATION BOARD FOR ISL29008 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:- |
发布紧急采购，3分钟左右您将得到回复。