SFH7773

Umgebungslicht- und Näherungssensor mit IR Emitter 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 ambient light • Ambient light sensor (ALS) - 0.03lx - 65000lx - High linearity - Srel well matched to the human eye Anwendungen Applications • • • • • • • • • 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 und Notebooks Kameras Consumer-Produkte Typ Type SFH 7773 2013-03-01 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 be reduced. • 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 Read data read data from proximity measurement Wait 110 ms 2013-03-01 2 SFH 7773 I2C interface • • • • • • 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 returns the 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 I2 C Analog / amplifier 6 SCL digital 5 INT + proximity ambient light dataregister LED 1 VLED driver 4 GND 2013-03-01 2 GNDLED 3 8 CATH SFH 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 read and 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 SFH7773. This mode can also be used for ambient light sensor and proximity sensor. The measurement repetition rate and current through the LED is defined by MCU. Measurement results can be read from the data register, the status from the interrupt register. Proximity Sensor GE RE D TR IG (ALS) (PS) TR IG Ambientlight Sensor IN G NN -RU EE FR STAND_BY IN NN -RU EE FR STAND-BY GE RE D OFF G If VDD exceeds the threshold-voltage , the sensor will switch from OFF mode to STAND-BY mode. As shown in the transition-diagram above it is possible to switch between all modes without any restriction. The transition time between modes (ttrans) is < 10ms. The delay time between STAND-BY and start of measurement is max. 10ms for the ambient light sensor. 2013-03-01 4 SFH 7773 Maximum limits Parameter Symbol Value min. typ. Unit max. Storage temperature Tstg - 40 + 85 °C Supply voltage (between VDD and GND) VDD - 0.3 + 4.5 V Maximum Voltage of SDA, SCL and INT to GND Vdig - 0.3 + 3.6 V Maximum Voltage of VLED to GND VLED - 0.3 + 5.5 V Maximum Voltage between GND and GNDLED VLED - 0.5 + 0.5 V Electrostatic discharge - Human Body Model (according to JESD22-A114-E; Class2 ) ESD 2 kV Operating conditions Parameter Symbol Value min. typ. Unit max. Operation temperature Top - 20 85 °C Supply Voltage VDD 2.3 3.1 V Ripple on Supply Voltage (VDD min and max must stay in the VDD range, DC ... 100MHz) VDD,rip 10 mV Voltage for I/O (SDA, SCL, INT)1) VI/O 1.6 2.1 V Supply Voltage LED VLED 2.3 4.25 V TBD TBD mV mV Ripple VLED 1) DC... 30kHz VLED,rip 30kHz ... 100MHz The limits for the logic levels of SCL and SDA pins are the same as in the I²C bus specification from NXP (UM10204 „I²C bus specification and user manual“, Rev. 03 - 19 June 2007). The same limits are valid for the logic levels of the interrupt pin (INT): the maximum level for logic „LOW“ level is 30% of the I/O voltage VI/O, the minimum level for logic „HIGH“ level is 70% of the I/O voltage VI/O. 2013-03-01 5 SFH 7773 Characteristics (Ta = 25°C ) Parameter Symbol Value min. typ. Unit max. General Conditions for OFF mode1) On-time (from OFF to STAND-BY mode) 1) 1) Threshold level for STAND-BY mode VDD,off 1.4 V ton 0.2 s VDD,on 2.0 V Transition time between modes ttrans (STAND-BY ...TRIGGERED ...FREE-RUNNING) 10 ms STAND-BY mode current consumption IDD,stby 5 µA OFF mode current consumption IDD,off 2 µA Interrupt voltage level in LOW state (VI/O=1.8V) VINT,low 0.5 V Interrupt voltage level in HIGH state (VI/O=1.8V) VINT,high 1.7 V Proximity Sensor (PS) Wavelength of max. sensitivity Spectral range of sensitivity (50% of Smax) LED centroid wavelength (If = 100mA) Spectral bandwidth (If = 100mA) Temperature coefficient of LED emission Sensor signal (pseudo-logarithmic) λ S,max λ S,50% λ centroid ∆λ 850 nm tbd nm 850 nm 42 nm TC -0.5 %/K 0 ... 255 count 2) LED current, programmable, ( only when VLED - Vf >= 0.4V) ILED 5 200 mA Accuracy of LED current source ∆ILED -20 +20 % 300 µA Mean current consumption, FREE-RUNNING Iact ( LED „ON“, If=100mA, trep = 100ms, Vdd=2.65V, without LED current) Modulation frequency of LED current fmod Typical switching distance (Iled=200mA; t_int=750µs; R=90%; A=10x10cm²; threshold =90 counts) z Repetition time in free-running mode programmable trep Length of a single LED burst, programmable (burst length = integration time) tburst 2013-03-01 6 5 100 667 kHz 8 cm 10 ... 2000 ms 2500 µs SFH 7773 Parameter Symbol Value min. Update of register data after MCU request t Insensitive to sunlight up to 2013-03-01 10 50 7 typ. Unit max. ms klx SFH 7773 1) Start-up sequence VDD 2.0V 1.4V upper threshold limit lower threshold llimit ton t on