|
|
PDF MAX44009 Data sheet ( Hoja de datos )
| Número de pieza | MAX44009 | |
| Descripción | Ambient Light Sensor | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MAX44009 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
|
No Preview Available !
www.DataSheet.co.kr
19-5719; Rev 0; 1/11
EVAALVUAAILTAIOBNLEKIT
Industry’s Lowest-Power
Ambient Light Sensor with ADC
General Description
The MAX44009 ambient light sensor features an I2C
digital output that is ideal for a number of portable appli-
cations such as smartphones, notebooks, and industrial
sensors. At less than 1µA operating current, it is the
lowest power ambient light sensor in the industry and
features an ultra-wide 22-bit dynamic range from 0.045
lux to 188,000 lux.
Low-light operation allows easy operation in dark-glass
applications.
The on-chip photodiode’s spectral response is optimized
to mimic the human eye’s perception of ambient light
and incorporates IR and UV blocking capability. The
adaptive gain block automatically selects the correct lux
range to optimize the counts/lux.
The IC is designed to operate from a 1.7V to 3.6V sup-
ply voltage range and consumes only 0.65µA in full
operation. It is available in a small, 2mm x 2mm x 0.6mm
UTDFN-Opto package.
Applications
Tablet PCs/Notebook Computers
TVs/Projectors/Displays
Digital Lighting Management
Portable Devices
Cellular Phones/Smartphones
Security Systems
Features
S Wide 0.045 Lux to 188,000 Lux Range
S Small, 2mm x 2mm x 0.6mm UTDFN-Opto
S VCC = 1.7V to 3.6V
S ICC = 0.65µA Operating Current
S -40NC to +85NC Temperature Range
S Device Address Options
1001 010x and 1001 011x
Ordering Information
PART
PIN-PACKAGE
TEMP RANGE
MAX44009EDT+
6 UTDFN-Opto-EP* -40NC to +85NC
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Block Diagram
VCC
VISIBLE +IR
PHOTODIODE
MAX44009
IR
PHOTODIODE
16-BIT
ADC
6-BIT RANGE
CDR, TIM
CONTROL
16-BIT
ADC
DIGITAL
SIGNAL
PROCESSING
SDA
I2C SCL
AO
INT
N
GND
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
Industry’s Lowest-Power
Ambient Light Sensor with ADC
Typical Operating Characteristics (continued)
(VCC = 1.8V, default power-up setting; unless otherwise noted.)
SUPPLY CURRENT vs. LUX READING
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
100
SUNLIGHT
1k 10k
LUX READING (LUX)
100k
LIGHT SENSITIVITY vs. LUX LEVEL
350
300
FLUORESCENT
LAMP
250
200
150 INCANDESCENT
LAMP
100
50
0
0 50 100 150 200 250 300
REFERENCE METER READING (LUX)
120
110
100
90
80
70
60
50
40
30
20
10
0
0
SDA INT OUTPUT LOW VOLTAGE
vs. SINK CURRENT
SDA
INT
123456789
ISINK (mA)
10
TOP VIEW
SDA SCL INT
654
Pin Configuration
MAX44009
+ EP
123
VCC GND
A0
UTDFN-Opto
(2mm x 2mm)
Pin Description
PIN NAME
PIN DESCRIPTION
1 VCC Power Supply
2
GND
Ground
3 A0 Address Select. Pull high to select address 1001 011x or low to select address 1001 010x.
4 INT Interrupt Output. Use an external pullup resistor.
5 SCL I2C Clock Bus
6
SDA
I2C Data Bus
— EP Exposed Pad. Connect EP to ground.
5
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
Industry’s Lowest-Power
Ambient Light Sensor with ADC
BIT 7
LE3
BIT 6
LE2
BIT 5
LE1
BIT 4
LE0
BIT 3
LM7
Lower Threshold High-Byte Register 0x06
BIT 2
BIT 1
BIT 0
REGISTER
ADDRESS
LM6 LM5 LM4 0x06
The Lower Threshold High-Byte 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
BIT 7
T7
BIT 6
T6
BIT 5
T5
BIT 4
T4
BIT 3
T3
Threshold Timer Register 0x07
BIT 2
BIT 1
BIT 0
REGISTER
ADDRESS
T2 T1 T0 0x07
If the INTE bit = 1 and the ambient light level exceed 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 214 = 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
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet MAX44009.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MAX4400 | Rail-to-Rail Op Amps |  Maxim Integrated |
| MAX44000 | Ambient and Infrared Proximity Sensor | Maxim Integrated Products |
| MAX44004 | Digital Ambient Light Sensor | Maxim Integrated |
| MAX44005 | RGB Color / Temperature and Infrared Proximity Sensor | Maxim Integrated |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |