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PDF CM32181 Data sheet ( Hoja de datos )
| Número de pieza | CM32181 | |
| Descripción | I2C Ambient Light Sensor | |
| Fabricantes | Capella | |
| Logotipo |  |
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Equation Chapter 1 Section 1
Serial No. 201307190009
CM32181
Low Power, High Sensitivity
I2C Ambient Light Sensor
Rev: 1.1 Revised 11th-June-2013
Description
Features
CM32181 is an advanced ambient light sensor with
I2C protocol interface and designed by the CMOS
process. It is easily operated via a simple I2C
command. The active interruption feature within the
threshold windows setting offers the benefit of
eliminating loading of the controller monitor.
CM32181 incorporates a photodiode, amplifiers and
analog circuits into a single chip. The best spectral
sensitivity is used to closely capture real human eye
responses. CM32181 has excellent temperature
compensation. Its robust refresh rate setting does not
need an external RC low pass filter. Software
shutdown mode is provided which reduces power
consumption to be less than 0.5μA. CM32181’s
operating voltage ranges from 2.5V to 3.6V and
consumes only 1uA. The maximum detective light
strength is over 167K Lux.
Block Diagram
• Filtron™ technology adoption :
excellent responsivity : close to real human eye
responses
• High sensitivity:
minimum detectable intensity 0.005 Lux/Bit
supports low transmittance(dark) lens design
• O-Trim™ technology adoption :
ALS output tolerance: ± 10%
• Support various Low power modes.
• Excellent temperature compensation: -40 to 85ºC
• High dynamic detection resolution
• Standard I2C protocol interface
• Interruption feature (INT) support
Programmable interrupt function with upper and
lower thresholds. Adjustable persistence to
prevent false triggers.
• Fluorescent light flicker immunity
• Software shutdown mode control
• Operation voltage from 2.5V to 3.6V
• Ambient light strength detection range over 100K
Lux
• Package: OPLGA (2.35 x 1.8 x 1.0 mm)
• Lead-free package (RoHS compliant)
VDD
Temperature
Sensor
Low Pass Filter
Timing
Controller
Output
buffer
with
I2C interface
SCL
SDA
INT
Applications
• Notebook, Tablet, TV
• Mobile Phone, Smart-phone, PDA
• Automotive
Pin Definition
Oscillator
ADDR
GND
OPLGA
<Top View>
1 Ground
4 Address Select
2 I2C Data
5 I2C Clock
3 Interrupt
6
Power
www.capellamicro.com
© Copyright 2013, Capella Microsystems, Inc.
1 page  
CM32181
High Sensitivity I2C Ambient Light Sensor
Serial No. 201307190009
Parameter Timing Information
I2CBus
CLOCK
(SCLK)
I2CBus
DATA
(SDAT)
Start by
Master
WSA7 SA6 SA5 SA4 SA3 SA2 SA1
SA7 SA6 SA5 SA4 SA3 SA2 SA1 SA0
I2CBus Slave Address Byte
ACK by
CM36292
Command Code
ACK by
CM36292
I2CBus
CLOCK
(SCLK)
I2CBus
DATA
(SDAT)
I2CBus
CLOCK
(SCLK)
SA7 SA6 SA5 SA4 SA3 SA2 SA1 SA0
SA7 SA6 SA5 SA4 SA3 SA2 SA1 SA0
Data Byte Low
ACK by
CM36292
Data Byte High
ACK by Stop by
CM36292 Master
Figure 2-1. I2C Bus Timing for Sending Word Command Format
I2CBus
DATA
(SDAT)
Start by
Master
WSA7 SA6 SA5 SA4 SA3 SA2 SA1
SA7 SA6 SA5 SA4 SA3 SA2 SA1 SA0
I2CBus Slave Address Byte
ACK by
CM36292
Command Code
ACK by
CM36292
I2CBus
CLOCK
(SCLK)
I2CBus
DATA
(SDAT)
SA7 SA6 SA5 SA4 SA3 SA2 SA1
R
SA7 SA6 SA5 SA4 SA3 SA2 SA1 SA0
Start by
Master
I2CBus Slave Address Byte
ACK by
CM36292
Data Byte Low
ACK by
Master
I2CBus
CLOCK
(SCLK)
I2CBus
DATA
(SDAT)
SA7 SA6 SA5 SA4 SA3 SA2 SA1 SA0
Data Byte High
ACK by
Master
Stop by
Master
Figure 2-2. I2C Bus Timing for Receiving Word Command Format
www.capellamicro.com
© Copyright 2013, Capella Microsystems, Inc.
5
Serial No. 201307190009
5 Page 
CM32181
High Sensitivity I2C Ambient Light Sensor
Command code 06(HEX)
1. Bit 15 defines interrupt flag while trigger
occurred due to data crossing low threshold
windows.
Bit 15
0
1
Function
Interrupt not triggered
Interrupt occurred
2. Bit 14 defines interrupt flag while trigger
occurred due to data crossing high threshold
windows.
Bit 14
0
1
Function
Interrupt not triggered
Interrupt occurred
Serial No. 201307190009
www.capellamicro.com
© Copyright 2013, Capella Microsystems, Inc.
11
Serial No. 201307190009
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet CM32181.PDF ] | |
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