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参数资料
| 型号： | ISL29002IROZ |
| 厂商： | Intersil |
| 文件页数： | 7/10页 |
| 文件大小： | 0K |
| 描述： | IC SENSOR LIGHT-DGTL I2C 8-ODFN |
| 标准包装： | 624 |
| 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： | 管件 |
ISL29002
Data Registers
The ISL29002 contains four 8-bit data registers. These
registers cannot be specifically addressed, as is conventional
with other I 2 C peripherals; instead, performing a read operation
on the device always returns all available registers in ascending
order. See Table 2 for a description of each register.
The first two 8-bit data registers contain the most recent
sensor reading. The meaning of the specific value stored in
these data registers depends on the command written via
the I 2 C interface; see Table 1 for information on the various
commands. The first byte read over the I 2 C interface is the
least-significant byte; the second is the most significant. This
byte ordering is often called “little-endian” ordering.
The third and fourth 8-bit data registers contain the
internal oscillator frequency, providing 220ms internal timing.
In addition, the maximum lux range of Diode 1 is also
halved, from 50,000lux to 25,000lux, and the resolution is
doubled, from 0.65 counts per lux to 1.3 counts per lux.
The acceptable range of this resistor is 50k Ω (providing 55ms
internal timing, 100,000lux maximum reading, ~0.33 counts
per lux) to 500k Ω (550ms internal timing, 10,000lux maximum
reading, ~3.3 counts per lux). See Table 3 for R EXT selection .
When using one of the three internal timing modes, the
ISL29002’s resolution is determined by the ratio of the max lux
range to 32,768, the number of clock cycles per integration.
The following equations describe the light intensity, E in lux,
as a function of the sensor reading, and the integration time
as a function of the external resistor.
E ( Lux ) = ------------------ ? --------------------------------------- ? Data1
R ext
100k Ω
integration counter value corresponding to the most recent
sensor reading. The ISL29002 includes a free-running
oscillator, each cycle of which increments a 16-bit counter. At
the end of each integration period, the value of this counter
is made available in these two 8-bit registers. Like the
sensor reading, the integration counter value is read across
the I 2 C bus in little-endian order.
TABLE 2. DATA REGISTERS
1 50 , 000lux
32,768 ( R ext ? 100k Ω )
Tint = 110ms ? ------------------
where,
E is the measured light intensity in lux
Data1 is the sensor reading
(EQ. 2)
(EQ. 3)
ADDRESS
00(hex)
01(hex)
CONTENTS
Least-significant byte of most recent sensor reading.
Most-significant byte of most recent sensor reading.
T int is the integration time,
R EXT is external resistor value.
TABLE 3. R EXT RESISTOR SELECTION GUIDE
02(hex)
Least-significant byte of integration counter value
corresponding to most recent sensor reading.
R EXT
(k Ω )
INTEGRATION LUX RANGE RESOLUTION,
TIME (ms) (lux) COUNTS/LUX
03(hex)
Most-significant byte of integration counter value
corresponding to most recent sensor reading.
50 (Min)
90.9
100
55
100
110
100,000
55,000
50,000
0.33
0.61
0.67
Note that the integration counter value is only available
Recommended
when using one of the three externally-timed operating
modes; when using internally-timed modes, the device will
NAK after the two-byte sensor reading has been read.
200
500 (Max)
220
550
25,000
10,000
1.33
3.33
Internal Timing Mode
When using one of the three internal timing modes, each
integration period of the ISL29002 is timed by 2 15 = 32,768
clock cycles of an internal oscillator. The nominal frequency
of the internal oscillator is 300kHz, which provides 110ms
internally-timed integration periods. The oscillator frequency
is dependent upon an external resistor, R EXT , and can be
adjusted by selecting a different resistor value. The
External Timing Mode
When using one of the three external timing modes, each
integration period of the ISL29002 is determined by the time
which passes between consecutive external timing commands
received over the I 2 C bus. The user starts the integration by
sending an external command and stops the integration by
sending another external command. The integration time, T int ,
therefore is determined by the following equation:
T int = ----------
resolution and maximum range of the device are also
affected by changes in R EXT ; see below.
i I2C
f I2C
(EQ. 4)
f osc = 300kHz ? ------------------
The oscillator frequency, f osc can be calculated with the
following equation:
100k Ω
(EQ. 1)
R EXT
R EXT is an external resistor required nominally 100k Ω , and
provides 110ms internal timing and a 1-50,000lux range for
Diode 1. Doubling this resistor value to 200k Ω halves the
7
where:
i I2C is the number of I 2 C clock cycles to obtain the T int.
f I2C is the I 2 C operating frequency.
The internal oscillator, f OSC , operates identically in both the
internal and external timing modes, with the same
dependence on R EXT . However, when using one of the three
external timing modes, the number of clock cycles per
FN7465.2
December 1, 2006
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相关代理商/技术参数 |
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| ISL29002IROZ-EVALZ | 功能描述:EVALUATION BOARD FOR ISL29002 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:- |
| ISL29002IROZ-T7 | 功能描述:IC SENSOR LIGHT-DGTL I2C 8-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) |
| ISL29003IROZ | 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) |
| ISL29003IROZ-EVALZ | 功能描述:EVALUATION BOARD FOR ISL29003 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:- |
| ISL29003IROZ-T7 | 功能描述:光学数位转换器 ISL29003IROZ LIGHT-T O-DIGTL I2C GAIN 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 |
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