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| 型号： | MAX9635EDT+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/20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
Table 9. Recommended Manual Mode Settings for Configuration Register (0x02) and
Threshold Registers (0x05, 0x06)
APPLICATION CONDITIONS
RECOMMENDED SETTINGS
FOR CONFIGURATION
REGISTER (0x02)
RANGE OF EXPONENTS FOR
UPPER AND LOWER
THRESHOLD REGISTERS
(0x05 AND 0x06)
LUX LSB
(MIN)
0.045
0.09
0.18
0.36
0.72
1.44
2.88
5.76
11.52
23.04
46.08
LUX
(MAX)
2938
5875
11,750
23,501
47,002
94,003
188,006
188,006
188,006
188,006
188,006
LUX LSB
(MAX)
11.52
23.04
46.08
92.16
184.32
368.64
737.28
737.28
737.28
737.28
737.28
INTEGRATION
TIME (ms)
800
400
200
100
800
50
400
25
200
12.5
100
6.25
50
25
12.5
6.25
TIM[2:0]
000
001
010
011
000
100
001
101
010
110
011
111
100
101
110
111
CDR
0
0
0
0
1
0
1
0
1
0
1
0
1
1
1
1
EXPONENT
(MIN)
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
EXPONENT
(MAX)
1000
1001
1010
1011
1100
1101
1110
1110
1110
1110
1110
Note: In manual mode, exceeding the lux (max) causes an overload error (exponent = 1111).
Typical Operating Sequence
To utilize the ultra-low power consumption of the IC in
end applications, an interrupt pin is provided to eliminate
the need for the system to poll the device continuously.
Since every clock and data bit transmitted on I 2 C can
consume up to 1mA (assuming 1.8k I pullup resistor to
a 1.8V rail), minimizing the number of I 2 C transactions
on the data bus can save a lot of power. In addition,
eliminating the need to poll the device frees up process-
ing resources for the master, improving overall system
performance.
The typical sequence of communication with the IC is
as follows:
1) Master reads lux reading from registers 0x03 and
0x04.
2) Master sets the upper lux threshold and lower lux
threshold in registers 0x05 and 0x06 so that a user-
programmed window is defined around the current
lux readings.
3) Master sets suitable threshold timer data in register
0x07.
4) Master works on other tasks until alerted by the INT
pin going low. This is where the master spends much
of its time.
5) When alerted by the INT pin going low, the master
reads the Interrupt Status register 0x00 to confirm
the source of interrupt was the IC. The master takes
appropriate action.
6) Repeat from Step 1.
13
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