Ingeniero
Ambient Light and Proximity Sensor with Integrated IR Emitter
Lead (Pb) Free Product - RoHS Compliant
SFH 7773
Preliminary datasheet
Wesentliche Merkmale
Features
• Näherungssensor- Detektionsbereich bis
150mm
- 850nm Emitter, im Gehäuse integriert
- Umgebungslicht-unempfindlich
• Umgebungslichtsensor
- 0.03lx - 65000lx
-Gute Linearität
- Spektrale Empfindlichkeit ähnlich dem
menschlichen Auge
• I2C interface
- 100kHz / 400kHz und 3.4MHz Mode
- verschiedene Messmoden programmierbar
(Standby, Triggered, Free-running)
- I²C-Adresse: 0111 000X
• typ 2μA Stromverbrauch im Standby Mode
• Proximity sensor (PS)
- Detection-range up to 150mm
- 850nm IR emitter integrated in package
- Insensitive to ambientlight
• Ambient light sensor (ALS)
- 0.03lx - 65000lx
- High linearity
- Srel well matched to the human eye
Anwendungen
Applications
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• I2C interface
- 100kHz / 400kHz and 3.4MHz mode
- Measurement modes programmable
(Standby, Triggered, Free-running)
- I²C slave address: 0111 000X
• Current consumption typ. 2μA in Standby mode
Mobiltelefone
PDAs undNotebooks
Kameras
Consumer-Produkte
Typ
Type
SFH 7773
2012-02-20
Mobile phones
PDAs and notebooks
Cameras
Consumer products
Bestellnummer
Ordering Code
Q65111A1258
1
SFH 7773
Application diagram and basic information
• Blocking capacitors for VDD and VLED are required for proper operation of the device. Based on the
power supply quality the capacitor values can bereduced.
• Proposed size for the pull-up resistors is 560 Ohm.
Short Evaluation program
Adress
Command
Action
0x80
Write 03
Ambient light Sensor in FREE-RUNNING mode
0x81
Write 03
Proximity Sensor in FREE-RUNNING mode
0x8C
Read data
read LSByte data from ambient light measurement
0x8D
Read data
read MSByte data from ambient light measurement
0x8F
Readdata
read data from proximity measurement
Wait 110 ms
2012-02-20
2
SFH 7773
I2C interface
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1.8V I/O-logic level for SDA and SCL
I/O-pins are open drain type and logic high level is set with external pull-up resistor
SFH 7773 operates in slave mode with address 0x38.
Designed for the I2C-modes: Standard (100 kb/s), Fast (400 kb/s) and High Speed (3.4 Mb/s)Combined format is supported (see I2C Bus specification UM10204 from NXP) for data reading
Block READ and WRITE modes are available. In these modes several registers can be read or written
during a single I2C traffic period. Registers are returned in a cyclic manner until the bus master sends
the stop condition. E.g. if master uses block read and starts from register 0x8C, the slave returnsthe
following register values: 0x8C, 0x8D, 0x8E, 0x8F, 0x90, 0x91, 0x92, 0x93, 0x94 and so on until the
master sends stop condition.
• Interrupt pin (INT): open-drain output (like SDA and SCL)
VDD
3
7 SDA
I2C
Analog / amplifier
6 SCL
digital
5 INT
+
proximity
ambient
light
dataregister
LED
1 VLED
driver
4
GND
2012-02-20
2
GNDLED
3
8
CATHSFH 7773
Measurement modes
IDD is below 2μA and the device is inactive. Other units may use the I2C bus without
OFF
any restrictions; I/O pins and INT are in Z state. There is no sink current through the
LED
STAND-BY
This is the initial mode after power-up. IDD is below 5μA. No measurement is
performed. Device can be activated by I2C bus communication. Data registers can
be readand written. The data will be stored in the registers when the device goes
from TRIGGERED or FREE-RUNNING to STAND-BY.
TRIGGERED
Every measurement is separately initiated by MCU. This mode can be used for
ambient light sensor and proximity sensor. Measurement data are available in the
registers after a defined delay time.
FREE-RUNNING
Measurements are triggered internally by...
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