- 您现在的位置：买卖IC网 > PDF目录18658 > MAX9635EDT+T (Maxim Integrated)IC AMBIENT LIGHT SENSOR 6UTDFN PDF资料下载
参数资料
| 型号： | MAX9635EDT+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 11/20页 |
| 文件大小： | 0K |
| 描述： | IC AMBIENT LIGHT SENSOR 6UTDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 带接近传感器： | 无 |
| 波长： | 630nm |
| 电源电压： | 1.7 V ~ 3.6 V |
| 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) |
Industry’s Lowest-Power
Ambient Light Sensor with ADC
Lower Threshold High-Byte Register 0x06
BIT 7
LE3
BIT 6
LE2
BIT 5
LE1
BIT 4
LE0
BIT 3
LM7
BIT 2
LM6
BIT 1
LM5
BIT 0
LM4
REGISTER
ADDRESS
0x06
The Lower Threshold register exponent with the four most significant bits of the mantissa sets the lower trip level for
interrupt functionality. This lower limit is relevant only if the INTE bit in the Interrupt Enable register is set. If the lux level
is below this light level for a time greater than that specified in the Threshold Timer register, the INTS bit in the Interrupt
Status register is set and the INT pin is pulled low.
Mantissa (LM[7:4]): Four most significant bits of mantissa lower threshold
Exponent (LE[3:0]): Exponent bits lower threshold
Lower lux threshold = 2 (exponent) x mantissa x 0.045
Exponent = 8xLE3 + 4xLE2 + 2xLE1 + LE0
Mantissa = 128xLM7 + 64xLM6 + 32xLM5 + 16xLM4
Threshold Timer Register 0x07
BIT 7
T7
BIT 6
T6
BIT 5
T5
BIT 4
T4
BIT 3
T3
BIT 2
T2
BIT 1
T1
BIT 0
T0
REGISTER
ADDRESS
0x07
If the INTE bit = 1 and the ambient light level exceeds either threshold limit for a time longer than that specified by the
Threshold Timer register, then the INTS bit is set to 1 and the INT pin is pulled low.
The value in this register sets the time used to control this delay. A value of 0x00 in this register (with INTE bit = 1 in the
Interrupt Enable register) configures the IC to assert the interrupt pin as soon as the light level exceeds either threshold.
Time delay = (128xT7 + 64xT6 + 32xT5 + 16xT4 + 8xT3 + 4xT2 + 2xT1 + T0) x 100ms.
Applications Information
Auto and Manual Modes
In auto mode configuration (default setting), CDR and
TIM bits are internally generated. The autoranging circuit
uses two different methods to change its sensitivity. For
light intensities greater than 700 lux, a current divider
reduces the photodiode’s current by a factor of 8. The
default, as in the previous example, is a division of 1:
current goes directly into the I to F converter. As light
intensity decreases, the autoranging circuit increases
the integration time from 100ms to 200ms to 400ms, or
to 800ms. The combination of the current divider and the
different integration times give the A/D a range 8 times
higher, as well as 8 times lower, than its nominal 16-bit
range. This gives a dynamic range of 22 bits or slightly
over 4,000,000 to 1.
In manual mode, the user has access to 4 bits (CDR and
TIM[2:0]) to override the autoranging circuitry. These
affect the integration time of the A/D and the current
division ratio. See the register description for manual
configuration mode (0x02, bit 6).
Data Format of Lux Reading
The IC has a user-friendly digital output format. It con-
sists of a 4-bit exponent followed by an 8-bit mantissa.
In its highest sensitivity mode, 1 count represents 0.045
lux. The mantissa has a maximum value of 255, and the
exponent has a maximum value of 14. This gives a maxi-
mum range: 255 x 2 14 = 4,177,920. At 0.045 lux/LSB, the
maximum lux reading is 188,000 lux. Any reading greater
than that (i.e., exponent = 15) is considered to be an
overload. No conversion formulas are needed as in the
case of dual-diode ambient light sensors.
The IC’s output (registers 0x03 and 0x04) comprises a
12-bit result that represents the ambient light expressed
in units of lux.
Here is how lux is calculated:
Lux = (2 (exponent) x mantissa) x 0.045
The exponent is a 4-bit number ranging from 0000 to
1110 (zero to 14).
The mantissa is an 8-bit number ranging from 0000 0000
to 1111 1111 (zero to 255).
11
相关PDF资料 |
PDF描述 |
|---|---|
| 355S5S1 | CABLE R/A FEMAL-STR FMAL 5POS 1M |
| 184P144 | CABLE SGL-END R/A MALE 4POS 12' |
| XREWHT-L1-0000-00CE4 | LED XLAMP WHITE 7X9MM SMD |
| XREWHT-L1-0000-00CE3 | LED COOL WHITE 7X9MM SMD |
| XPEHEW-L1-R250-00H50 | LED XLAMP XPE HIEFF WHITE SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9635ESA+ | 功能描述:环境光传感器 Ambient Light Sensor RoHS:否 制造商:Vishay Semiconductors 工作电源电压: 峰值波长:570 nm 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:T-1 封装:Bulk |
| MAX9635ESA+T | 功能描述:环境光传感器 Ambient Light Sensor RoHS:否 制造商:Vishay Semiconductors 工作电源电压: 峰值波长:570 nm 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:T-1 封装:Bulk |
| MAX9635EVKIT | 功能描述:光学传感器开发工具 MAX9635 Eval Kit RoHS:否 制造商:ams 工具用于评估: 接口类型: 最大工作温度: |
| MAX9635EVKIT# | 功能描述:环境光传感器 Industry’s Lowest-Power Ambient Light Sensor with ADC RoHS:否 制造商:Vishay Semiconductors 工作电源电压: 峰值波长:570 nm 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:T-1 封装:Bulk |
| MAX9635EVKIT+ | 功能描述:光学传感器开发工具 MAX9635 Eval Kit RoHS:否 制造商:ams 工具用于评估: 接口类型: 最大工作温度: |
发布紧急采购，3分钟左右您将得到回复。