APDS-9801

APDS-9801 Digital Proximity and Analog Ambient Light Sensor Data Sheet Description Features APDS-9801 is a module that integrates functions of an Analog ambient light sensor (ALS) and a proximity sensor (PS). The sensor has four chips in one small package: an ambient light sensor IC, proximity sensor signal conditioning circuitry and a proximity sensor that includes both an emitter and detector. The Analog ambient light sensor has current output, with spectral response close to the CIE standard Photopic observer. The proximity sensor IC has a LED driver and receiver circuit with digital count output, featuring excellent ambient light cancellation capability. With the built-in LED, the proximity sensor is able to sense the proximity of an object, such as finger or head to a portable device. x Integrated module with built-in IR LED, IR Detector, Digital Signal Conditioning ASIC and Analog ALS Ambient light sensors can be used to control the brightness of display backlighting by detecting the ambient light illuminance level. Proximity sensor technology make possible applications where detection or proximity of a user’s head in relationship to display will turn off/on the keypad and LCD backlight. The combination of ambient light sensors and proximity sensors in one module make it ideal for portable devices, such as mobile phone, PDA and notebooks. x Package size: L 6.1 x W 3.9 x H 1.75 mm x Sensor power supply voltage range: 1.7 V to 2.5 V x I2C Bus power supply voltage range: 1.7 V to 3.6 V x Broad VLED range for PS: 2.5 V to 5V x PS Shutdown Current 1PA Typical x ALS approximate the Human Eye response x Low sensitivity variation across various light sources x ALS Output linearity up-to 5k Lux range x Operational under sunlight (PS) x Artificial light Immunity x Low crosstalk between Emitter & Detector x Programmable LED driving current and burst pulse control (PS) x Interrupt logic with Programmable Threshold x Lead-free & ROHS Compliant Applications x PDA and mobile phones Ordering Information Part Number Packaging Type Quantity x Portable and Handheld devices APDS-9801 Tape and Reel 2500 per reel x Personal Computers/Notebooks x Amusement/Games/Vending Machines x Contactless Switches Functional Block Diagram 8-VLED 7–PS-INTR 6-IOUT 5-SDA OSC LED Driver I2C Interfacing Control & Digital Logic ³ADC (12 bit) Pre-Amp Current Amplifier GND 1-NC 2-VDD 3-GND 4-SCL I/O Pins Configuration Table: Pin SYMBOL Description 1 NC No Connect 2 VDD Power Supply Pin 3 GND Ground 4 SCL I2C Clock Input 5 SDA I2C Data Input/Output 6 IOUT ALS Output Current 7 PS-INTR Output pin for PS Level Interrupt 8 VLED Power Supply pin for LED. Connect this pin to V-Battery or Power supply Absolute Maximum Ratings Parameter Symbol Min Max Unit Conditions Supply Voltage VDD -0.5 4 V TA = 25°C Voltage at I/O pins VIO -0.5 TA = 25°C Reflow Soldering Temperature TS 5 V 260 °C Recommended Operating Conditions Parameter Symbol Min Max Unit Operating Temperature TA -40 70 ºC Storage Temperature TS -40 85 ºC Supply Voltage VDD 1.7 2.5 V I2C Bus Power Supply Voltage VBUS 1.7 3.6 V PS LED Power Supply Voltage VLED 2.5 5 V 2 Condition Electrical & Optical Specifications (TA = 25°C) Parameter Symbol ALS Output Current IOUT Min. Unit Conditions 83 PA VDD=1.8 V, Ev=100 Lux, [1] ALS Dark Current 300 nA VDD=1.8 V, Ev=0 Lux ALS Peak Spectral Sensitivity 560 nm ALS Light Current Ratio Typ. Max.   [2] 1.1 ALS Saturation Voltage VSAT VDD-1.0 VDD-0.8 V SCL, SDA Input High Voltage VIH 1.25 SCL, SDA Input Low Voltage VIL 0.54 V INTR, SDA Output Low Voltage (Open Drain) [PS] VOL 0.3 V ISINK=3 mA 0.6 V ISINK=6 mA Load=150 k:, VDD=1.8 V, Ev=100 Lux, [1] V IAVG at 5 ms delay time 1.3 mA VDD=1.8 V, IDD+ILEDAVG [3] IAVG at 50 ms delay time 180 PA VDD=1.8 V, IDD+ILEDAVG [4] IAVG at 500 ms delay time 90 PA VDD=1.8 V, IDD+ILEDAVG [5] 1 PA VDD=1.8 V, Ev=0 Lux 1300 counts Kodak 18% grey card, 30 mm distance, Freq=100 kHz, n=20 pulses, Duty-cycle=25%, ILED=100 mA, VDD=1.8 V, [6] Refer to Figure 6. nm   75, 100, 125, 150 mA Programmable via I2C bus PS-LED Pulse Frequency 50, 100, 200 kHz Programmable via I2C bus PS-Pulse Duty-Cycle 12.5%, 25%, 37.5%, 50% Programmable via I2C bus PS-Number of Pulses 4, 8, 12, 16, 20, 24, 28, 32 Programmable via I2C bus PS-Burst Interval Delay 5, 20, 50, 125, 250, 500, 1000, 2000 Shutdown Current ISD PS Output Count LED Peak Wavelength PS LED - Output Current Peak Full Scale ADC Count (PS) Crosstalk (PS)   ILED 940     ms Programmable via I2C bus 4092 counts Programmable via I2C bus 250 counts Freq=100kHz, n=20pulses, Duty-cycle=25%, ILED=100mA, VDD=1.8V, [7] Note: 1. White LED is used as light source. 2. VDD=1.8 V, Current Light Ratio = (output current at 100 Lux Incandescent) / (output current at 100 Lux Fluorescent). 3. Test conditions: VDD=1.8 V, 5 ms delay, ILED=100 mA, 20 pulses, 25% duty cycle, Freq=100 kHz, Ev=0 Lux. 4. Test conditions: VDD=1.8 V, 50 ms delay, ILED=100 mA, 20 pulses, 25% duty cycle. Freq=100 kHz. Ev=0 Lux. 5. Test conditions: VDD=1.8 V, 500 ms delay, ILED=100 mA, 20 pulses, 25% duty cycle. Freq=100 kHz. Ev=0 Lux. 6. Test without window between sensor and grey card object. 7. Test without window or object above sensor. 3 APDS–9801 Typical Application Circuit VLED C4 1-NC VDD VBUS C3 R4 8-VLED 2-VDD R3 R2 7  PS-INTR GPIO C2 APDS-9801 C1 3-GND 6-IOUT ADC R1 4-SCL MCU C5 5-SDA SDA SCL R1 1 k: 1/16W 5% R2, R3, R4 10 k: 5% C1, C3 6.8 PF 10V C2, C4 100 nF 10V C5 10 PF 10V 4 Definition of timing for I2C devices This section will describe the main protocol of the I2C bus. For more details and timing diagrams, please refer to the I2C bus specification. SDA tLOW tf tf tSU;DAT tr tHD;STA tSP tr tBUF SCL S tHD;STA tHD;DAT tHIGH tSU;STA tSU;STO Sr P S MSC610 Characteristics of the SDA and SCL bus lines for I2C-bus devices STANDARD-MODE FAST-MODE PARAMETER SYMBOL MIN. MAX. MIN. MAX. UNIT SCL clock frequency fSCL 0 100 0 400 kHz Hold time (repeated) START condition. After this period, the first clock pulse is generated tHD;STA 4.0 – 0.6 – Ps LOW period of the SCL clock tLOW 4.7 – 1.3 – Ps HIGH period of the SCL clock tHIGH 4.0 – 0.6 – Ps Set-up time for a repeated START condition tSU;STA 4.7 – 0.6 – Ps Data hold time: tHD;DAT 300 – 300 – ns Data set-up time tSU;DAT 250 – 100 – ns Rise time of both SDA and SCL signals tr – 1000 – 300 ns Fall time of both SDA and SCL signals tf – 300 300 ns Set-up time for STOP condition tSU;STO 4.0 – 0.6 – Ps Bus free time between a STOP and START condition tBUF 4.7 – 1.3 – Ps Capacitive load for each bus line Cb – 400 – 400 pF Noise margin at the LOW level for each connected device (including hysteresis) VnL 0.1VBUS – 0.1VBUS – V Noise margin at the HIGH level for each connected device (including hysteresis) VnH 0.2VBUS – 0.2VBUS – V 5 I2C Definition Start and Stop conditions SDA SCL S P START condition STOP condition Data transfer on I2C-bus P SDA MSB acknowledgement MSB signal from slave acknowledgement signal from receiver MSB SCL S or Sr 1 2 7 START or repeated START condition 9 ACK 8 1 2 3 to 8 9 ACK 1 2 3 to 8 clock line held LOW while interrupts are serviced byte complete, interrupt within slave A complete data transfer SDA SCL 1–7 8 9 1–7 8 9 1–7 8 9 P S START condition ADDRESS R/W ACK DATA DATA ACK STOP condition 1 7 1 1 8 1 1 S Slave Address Wr/Rd A Data Byte A P S Start Condition Wr Write "0" Rd Write "1" A Acknowledge (0 for ACK or 1 for NACK) P Sr Stop Condition Repeated Start Condition from Master to Slave from Slave to Master 6 ACK 9 ACK Sr Sr or P STOP or repeated START condition Write Byte Protocol 1 7 1 1 8 1 8 1 1 S Slave Address Wr A Common Code A Data Byte A P Read Byte Protocol 1 7 1 1 8 1 1 7 1 1 8 1 1 S Slave Address Wr A Common Code A Sr Slave Address Rd A Data Byte A P Slave Address APDS-9801 PS slave address is 1010101 [0X55] PS-I2C Interfacing Register Address for PS: ADDRESS Register Name Register Function – Command Specifies register address 0h Shutdown Power on/off 1h Pulse_Freq Set the period, duty cycle and number of pulses for burst pulses 2h Interval delay & control Set the delay time between burst pulses & control 3h Thres_low Low byte of interrupt threshold 4h Thres_high High byte of interrupt threshold 5h Data_low Low byte of ADC output 6h Data_high High byte of ADC output 7h interrupt Interrupt status and enable Command Register The command register specifies the address of the target register for subsequence read and write operations. The write byte protocol is used to configure the COMMAND register. 7 6 5 4 CMD Threshold Interrupt clear EOC Interrupt clear Software Reset 3 2 1 Address Reset Value: 0x00h FIELD BIT Description CMD 7 Select command register. Must be ‘1’ Threshold Interrupt clear 6 Clear the pending thresholds interrupt. Write ‘1’ to clear. Self clearing. EOC Interrupt clear 5 Clear the pending end of conversion of the ADC interrupt. Write ‘1’ to clear. Self clearing. Software Rest 4 Write 1 to this bit to reset the chip to default register value self clearing. This is for software reset only. ADDRESS 3:0 Register address. This field selects the specific register. 7 0 Shutdown Register (0h) 7 6 5 4 3 2 1 0 shutdown Reset value: 0x0h FIELD BIT Description Shutdown 0 0 for shutdown, oscillator and analog block all turn off 1 for turn on, measurement triggered by “start measurement” bit of interval delay/control register Pulse_Freq Register (1h) 7 6 Pulse count 5 4 reserved Reset value: 0x96h FIELD BIT Description Pulse count 7:5 Set the number of pulses for each burst. 000: 4 pulses 001: 8 pulses 010: 12 pulses 011: 16 pulses 100: 20 pulses (default) 101: 24 pulses 110: 28 pulses 111: 32 pulses Duty cycle 3:2 Set the duty cycle of the burst pulse. 00: 12.5% 01: 25.0% (default) 10: 37.5% 11: 50.0% Pulse frequency 1:0 8 Set the period for the burst pulse. 00: None 01: 50 kHz 10: 100 kHz (default) 11: 200 kHz 3 2 Duty cycle 1 0 Pulse frequency Interval Delay & Control Register (2h) 7 6 reserved 5 Start Measurement 4 3 2 LED Current Control 1 0 Interval Delay Reset value: 0x00h FIELD BIT Description Start Measurement 5 Write a “1” to this bit to enable measurement. By default this bit is ‘0’, no measurement. LED Current Control 4:3 LED Current Control 00: 75 mA 01: 100 mA (default) 10: 125 mA 11: 150 mA Interval Delay 2:0 Set the delay between the burst pulses. 000: 5ms 001: 20 ms 010: 50 ms 011: 125 ms 100: 250 ms 101: 500 ms (default) 110: 1s 111: 2s Interrupt Threshold Register (Low byte) (3h) 7 6 5 4 3 2 1 0 Interrupt threshold low byte Reset value: 0x00h FIELD BIT Description Interrupt threshold Low byte 7:0 Lower byte of 12 bits Interrupt threshold. The 12 bit interrupt threshold values are expressed as 12 bits values spread across 2 registers (register address 3h & 4h). Interrupt Threshold Register (High byte) (4h) 7 6 5 reserved 4 3 2 1 0 Interrupt threshold low byte Reset value: 0x00h FIELD BIT Description Interrupt threshold High byte 3:0 Upper 4 bits of 12 bits Interrupt threshold. The 12 bit interrupt threshold values are expressed as 12 bits values spread across 2 registers (register address 3h & 4h). 9 ADC Data Output Register (Low byte) (5h) 7 6 5 4 3 2 1 0 ADC output data low byte Reset value: 0x00h FIELD BIT Description ADC output data Low byte 7:0 Lower byte of 12bits ADC output data. The ADC data are expressed as 12 bits values spread across 2 registers (register address 5h & 6h). Read only. ADC Data Output Register (High byte) (6h) 7 6 5 4 3 2 reserved 1 0 ADC output data high byte Reset value: 0x00h FIELD BIT Description ADC output data high byte 3:0 Upper 4 bits of 12 bits ADC output data. The ADC data are expressed as 12 bits values spread across 2 registers (register address 5h & 6h). Read only. Interrupt Register (7h) 7 6 5 4 resv Negative Threshold interrupt status Positive Threshold interrupt status EOC interrupt status 3 2 resv 1 0 Threshold Interrupt enable EOC Interrupt enable Reset value: 0x00h FIELD BIT Description Negative Threshold interrupt status 6 Read only. Interrupt happens when ADC output data value fall below the interrupt threshold set by threshold registers. Write a ‘1’ to bit 6 of the command register to clear the interrupt. (note 2) Positive Threshold interrupt status 5 Read only. Interrupt happens when ADC output data value rise above the interrupt threshold set by threshold registers. Write a ‘1’ to bit 6 of the command register to clear the interrupt. (note 2) EOC Interrupt status 4 Read only. Interrupt happens when it is the end of conversion for the ADC. Write a ‘1’ to bit 5 of the command register to clear the interrupt. Threshold Interrupt Enable 1 ‘1’: threshold interrupt (when ADC rise above or fall below threshold set) enable to external interrupt pin. ‘0’: threshold interrupt (when ADC rise above or fall below threshold set) disable to external interrupt pin. EOC Interrupt Enable 0 ‘1’: EOC interrupt enable to external interrupt pin. ‘0’: EOC interrupt disable to external interrupt pin. 10 Note 1: Figure 3 Definition of transmit burst pulses 1st burst 2nd burst t Pclk N x pulses Delay Duty cycle = t/Pclk Delay = the time between the last burst pulse to the first burst pulse of the next burst Note 2: Interrupt Status Implementation The following diagram explained how the positive threshold interrupt status and negative threshold interrupt status is implemented. ADC Data and Interrupt threshold is compared. The output is high or low depends on the comparison result. The detection of rising edge of the comparator set the positive threshold interrupt status bit to ‘1’. The detection of falling edge of the comparator set the negative threshold interrupt status bit to ‘1’. ADC Data + Comparator Output Interrupt Threshold  Comparator output waveform: ‘1’ if ADC Data > Interrupt Threshold If rising edge is detected, Positive Threshold interrupt status bit is set to ‘1’. After reading the status bit, write ‘1’ to bit 6 of the command register to clear the status. Wait for another interrupt status assert. 11 ‘0’ if ADC Data < Interrupt Threshold If falling edge is detected, Negative Threshold interrupt status bit is set to ‘1’. After reading the status bit, write ‘1’ to bit 6 of the command register to clear the status. Wait for another interrupt status assert. PS – APPLICATION SOFTWARE Configuration the registers The Pulse_Freq register and Interval Delay and Control register are initialized to default values when power up. Setting these registers to desired values would be part of setup procedure. The value can be change to optimize the performance need. Below are samples code illustrates the setting of registers for various option. Set up Pulse_Freq //20 pulses, 25% Duty Cycle and 100kHz Pulse Frequency DeviceAddr = 0x55 //Slave address also be –or 0x55 Command = 0x81 //Set Command bit and address of Pulse_Freq Value = 0x86 WriteByte_i2c(DeviceAddr, Command, Value) //24 pulses, 50% Duty Cycle and 100kHz Pulse Frequency DeviceAddr = 0x55 Command = 0x81 Value = 0x8E WriteByte_i2c(DeviceAddr, Command, Value) Set up Interval Delay and LED Current Control //100mA of LED current and 5ms interval delay between the burst pulses DeviceAddr = 0x55 //Slave address also be – 0x55 Command = 0x82 //Set Command bit and address of register Value = 0x08 WriteByte_i2c(DeviceAddr, Command, Value) //150mA of LED current and 250ms interval delay between the burst pulses DeviceAddr = 0x55 Command = 0x82 Value = 0x1C WriteByte_i2c(DeviceAddr, Command, Value) Enable Measurement DeviceAddr = 0x55 Command = 0x82 ReadByte_i2c(DeviceAddr, Command, & Value) Value |= 0x20 WriteByte_i2c(DeviceAddr, Command, Value) 12 //Read back register value //Set Enable Measurement bit PS – Interrupts The interrupt feature of the device is simplifies and improves system efficiency by eliminating the need to poll the sensor for proximity distance value. The feature may enable at Interrupt Register. An interrupt will be happen when the values of ADC conversion value change from lower to upper or upper to lower over the interrupt threshold value. Negative Threshold interrupt status show when ADC output values fall below interrupt threshold from upper, and Positive Threshold interrupt status are vice versa. End of ADC Conversion interrupt also can be use. An interrupt will be generated when completion of each conversion of ADC. Write ‘1’ to bit 6 of the command register to clear the threshold interrupt or write ‘1’ to bit 5 of the command register to clear the End_of_Conversion interrupt. Set up Threshold Interrupt //Example threshold value = 0x1CA //Write the interrupt threshold low byte DeviceAddr = 0x55 Command = 0x83 Value = 0xCA WriteByte_i2c(DeviceAddr, Command, Value) //Write the interrupt threshold high byte DeviceAddr = 0x55 Command = 0x84 Value = 0x01 WriteByte_i2c(DeviceAddr, Command, Value) //Slave address also be – 0x55 //Set Command bit and addr of thresh low byte register //Slave address also be – 0x55 //Set Command bit and addr of thresh high byte register Enable Interrupt to external interrupt pin //Enable Threshold interrupt DeviceAddr = 0x55 Command = 0x87 Value = 0x02 WriteByte_i2c(DeviceAddr, Command, Value) //Enable End_of_Conversion interrupt DeviceAddr = 0x55 Command = 0x87 Value = 0x01 WriteByte_i2c(DeviceAddr, Command, Value) //Set Command bit and addr of interrupt register //Enable Threshold Interrupt //Set Command bit and addr of interrupt register //Enable EOC Interrupt Clear the pending Interrupt //Clear pending Threshold interrupt DeviceAddr = 0x55 Command = 0x40 Write_i2c(DeviceAddr, Command) //Slave address also be – 0x55 //Clear Threshold Interrupt //Clear pending End of Conversion of the ADC Interrupt DeviceAddr = 0x55 Command = 0x20 //Clear EOC Interrupt Write_i2c(DeviceAddr, Command) 13 Read ADC Data Output Values //Read the ADC low byte channel and store at ADC_DataLow DeviceAddr = 0x55 //Slave address also be – 0x55 //Set Command bit and addr of low byte of ADC Data output register Command = 0x85 ReadByte_i2c(DeviceAddr, Command, &ADC_DataLow) //Read the ADC high byte channel and store at ADC_DataHigh //Set Command bit and addr of high byte of ADC Data output register command = 0x86 ReadByte_i2c(DeviceAddr, Command, &ADC_DataHigh) Software Examples /********************************************************************** Definitions **********************************************************************/ #define DeviceAddr 0x55 //Slave address for device #define #define #define #define #define #define #define #define #define CMD ADDR_SD ADDR_PFR ADDR_ICR ADDR_THRESLOW ADDR_THRESHIGH ADDR_ADCDATALOW ADDR_ADCDATAHIGH ADDR_INTP 0x80 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 //Command //Shutdown Register address //Pulse_Freq Register address //Interval delay & Control Register address //Threshold Low Register address //Threshold High Register address //ADC Data Output Low Register address //ADC Data Output Low Register address //Interrupt Register address /********************************************************************** Global Variable **********************************************************************/ unsigned char PFR_Data; //hold data of Pulse_Freq Register unsigned char ICR_Data; //hold data of Interval delay & Control Register unsigned char ReadThresholdLow, ReadThresholdHigh //read back threshold register value unsigned char ADC_DataLow, ADC_DataHIGH //read back ADC data unsigned char IntSta; //read back interrupt status 14 /********************************************************************** Function Protoypes **********************************************************************/ void PXS_ShutDown(unsigned char value); void PXS_PulseFreq(unsigned char value); void PXS_PulseFreqRead(void); void PXS_IntvDelay(char value); void PXS_MeasurementEna(void); void PXS_IntvDelayRead(void); void PXS_ThresHold(unsigned char ThresholdLow, unsigned char ThresholdHigh); void PXS_ThresHoldRead(void); void PXS_IntpEna(unsigned char value); void PXS_IntpStatusRead(void); void PXS_IntpClr(void); void PXS_SoftwareReset(void); void PXS_ADCRead(void); void Main(void) { PXS_ShutDown(1); PXS_PulseFreq(0x86); PXS_IntvDelay(0x08); PXS_ThresHold(0xCA, 0x00); PXS_IntpEna(0x20); PXS_MeasurementEna(); //Power ON. //20 pulses, //25% Duty cycle, 100kHz pulse frequency //100mA LED Current Control and //5ms delay between burst pulses //Set Threshold values //Enable Interrupt Threshold //Enable Measurement While(1) { If(IntEna) { PXS_IntpStatusRead(); PXS_ADCRead(); PXS_IntpClr(); } } } 15 //if Interrupt occur //Read Interrupt Status //Read ADC Output value //Clear Interrupt /*********************************************************************** DESC: 0 for shutdown, oscillator and analog block turn off 1 for Power ON, measurement triggered by “start measurement” bit of interval delay/control register RETURNS: Nothing ***********************************************************************/ void PXS_ShutDown (unsigned char value) //1 = ON, 0 = OFF { unsigned char command; command = CMD| ADDR_SD; WriteByte_i2c(DeviceAddr, command, value); //Address of Shutdown Register } /*********************************************************************** DESC: Set the period, duty cycle and number of pulses for burst pulses RETURNS: Nothing ***********************************************************************/ void PXS_PulseFreq(unsigned char value) { unsigned char command, value; command = CMD|ADDR_PFR; WriteByte_i2c(DeviceAddr, command, value); //Address of Pulse_Freq Register } /*********************************************************************** DESC: Read back Pulse_Freq Register Value RETURNS: Pulse_Freq Register Value ***********************************************************************/ void PXS_PulseFreqRead(void) { unsigned char command; command = CMD|ADDR_PFR; ReadByte_i2c(DeviceAddr, command, &PFR_Data); //Address of Pulse_Freq Register } /*********************************************************************** DESC: Set the delay time between burst pulses & LED Current Control RETURNS: Nothing ***********************************************************************/ void PXS_IntvDelay(char value) { unsigned char command; command = CMD|ADDR_ICR; ICR_Data = value; WriteByte_i2c(DeviceAddr, command, ICR_Data); } 16 //Address of Interval Delay & Control Register /*********************************************************************** DESC: Enable measurement RETURNS: Nothing ***********************************************************************/ void PXS_MeasurementEna(void) { unsigned char command; command = CMD|ADDR_ICR; ICR_Data = 0x20 | ICR_Data; WriteByte_i2c(DeviceAddr, command, ICR_Data); //Address of Interval Delay & Control Register //Enable measurement } /*********************************************************************** DESC: Read back Interval delay & Control Register Value RETURNS: Interval delay & Control Register Value ***********************************************************************/ void PXS_IntvDelayRead(void) { unsigned char command; command = CMD|ADDR_ICR; ReadByte_i2c(DeviceAddr, command, &ICR_Data); } /*********************************************************************** DESC: Set the interrupt threshold RETURNS: Nothing ***********************************************************************/ void PXS_ThresHold(unsigned char ThresholdLow, unsigned char ThresholdHigh) { unsigned char command; } 17 command = CMD|ADDR_THRESLOW; WriteByte_i2c(DeviceAddr, command, ThresholdLow); //Set Interrupt Threshold Low Byte data command = CMD|(ADDR_THRESHIGH); WriteByte_i2c(DeviceAddr, command, ThresholdHigh); //Set Interrupt Threshold High Byte data /*********************************************************************** DESC: Read back interrupt threshold value RETURNS: Threshold Register value ***********************************************************************/ void PXS_ThresHoldRead(void) { unsigned char command; //Read back Interrupt Threshold Low Byte data command = CMD|ADDR_THRESLOW; ReadByte_i2c(DeviceAddr, command, &ReadThresholdLow); //Read back Interrupt Threshold High Byte data command = CMD|(ADDR_THRESHIGH); ReadByte_i2c(DeviceAddr, command, &ReadThresholdHigh); } /*********************************************************************** DESC: Set the interrupt enable RETURNS: Nothing ***********************************************************************/ void PXS_IntpEna(unsigned char value) { unsigned char command; command = CMD|ADDR_INTP; WriteByte_i2c(DeviceAddr, command, value); } /*********************************************************************** DESC: Read back Interrupt Register Status RETURNS: Interrupt status ***********************************************************************/ void PXS_IntpStatusRead(void) { unsigned char command; command = CMD|ADDR_INTP; ReadByte_i2c(DeviceAddr, command, &IntSta); } /*********************************************************************** DESC: Clear the pending thresholds & EOC interrupt RETURNS: Nothing ***********************************************************************/ void PXS_IntpClr(void) { unsigned char command; //Set the Clear bits of the pending threshold interrupt and EOC interrupt command = 0x60; Write_i2c(DeviceAddr, command); } 18 /*********************************************************************** DESC: Software Reset RETURNS: Nothing ***********************************************************************/ void PXS_SoftwareReset(void) { unsigned char command; command = 0x10; Write_i2c(DeviceAddr, command); //Set the Software Reset bits } /*********************************************************************** DESC: Read ADC Data Output Value RETURNS: ADC Low Byte and ADC HIGH Byte value ***********************************************************************/ void PXS_ADCRead(void) { unsigned char command; //Read ADC Register Low Byte data command = CMD|ADDR_ADCDATALOW; ReadByte_i2c(DeviceAddr, command, &ADC_DataLow); //Read ADC Register High Byte data command = CMD|(ADDR_ADCDATAHIGH); ReadByte_i2c(DeviceAddr, command, &ADC_DataHIGH); } 19 1.2 1.2 1 1 Relative Responsivity Normalized Radiant Intensity Typical Characteristics 0.8 0.6 0.4 0.2 0.6 0.4 0.2 0 800 900 1000 Wavelength (nm) 600 700 Normalized sensor spectral response 500 600 700 800 wavelength (nm) 900 1000 1100 Figure 3. ALS Photo Detector Spectral Response 1100 1000 900 800 700 600 500 400 300 200 100 0 0 100 200 300 400 500 600 700 800 900 1000 LIGHT INTENSITY (LUX) Figure 4. ALS Typical Output Current vs. Light Intensity TYPICAL VOUT VS LIGHT INTENSITY (VDD=2.5V, White LED) APDS-9801 DISTANCE PROFILE 2.00 4500 2.70KOHM 2.20KOHM 1.70KOHM 0.82KOHM 0.47KOHM 4000 3500 3000 COUNT 1.50 VOUT (V) 1000 TYPICAL IOUT VS LIGHT INTENSITY (White LED) APDS-9801 Eye Response 400 800 900 Wavelength (nm) Figure 2. PS Photo Detector Spectral Response IOUT (PA) 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 300 0 1100 Figure 1. PS LED Spectral response Response (a.u.) 0.8 1.00 2500 2000 1500 0.50 1000 500 0.00 0 100 200 300 400 500 600 700 800 900 1000 LIGHT INTENSITY (LUX) Figure 5. ALS Typical Output Voltage vs. Light Intensity 20 0 0 10 20 30 40 50 60 70 DISTANCE (mm) Figure 6. PS Output vs. Distance Typical Profile 80 90 100 110 APDS-9801 Package Outline TOP VIEW RIGHT VIEW 6.10 6 LED 5 PD ALS 0.98 3.40 Ø 1.30 3.90 7 Ø 0.90 Ø 0.90 8 1 2 3 2.50 0.75 4 1.60 0.70 1.05 1.75 FRONT VIEW BOTTOM VIEW PINOUT 0.90 (x8) 2 3 4 8 7 6 5 0.75 (x8) 1.80 1 1. NC 2. VDD 3. GRD 4. SCLK 5. SDA 6. IOUT 7. PS-INTR 8. VLED 0.63 (x6) Notes: 1. All dimensions are in millimeters. Dimension tolerance is ±0.1 mm unless otherwise stated. Recommended Land Pattern 1.10 1.10 1.10 0.95 1.60 0.95 1.10 0.43 21 0.43 0.43 Notes: 1. All dimensions are in millimeters. 2. Do NOT connect NC pins. APDS-9801 Tape & Reel Dimensions 8.00±0.10 4.00±0.10 2.00±0.10 Ø1.50+0.10 1.75±0.10 7.50±0.10 16.00 +0.30 -0.10 Unit Orientation in Carrier Tape Ø1.50+0.25 0.30±0.02 3.95±0.10 2.05±0.00 6.20±0.00 8°±0° A. K. B. 60° TYP. 5±1 120 ?X Ø 99. 3 +0.5 Ø 13.1 0 .2 11 Ø2 DETAIL A Ø3 1 ±1 30 All dimensions in millimeter. 22 2 16.5 ±0.2 Moisture Proof Packaging All APDS-9801 options are shipped in moisture proof package. Once opened, moisture absorption begins. This part is compliant to JEDEC MSL 3. Units in A Sealed Mositure-Proof Package Package Is Opened (Unsealed) Environment less than 30 deg C, and less than 60% RH ? Yes No Baking Is Necessary Yes Package Is Opened less than 168 hours ? No Perform Recommended Baking Conditions Recommended Storage Conditions Baking Conditions Package Temp. Time Storage Temperature 10qC to 30qC Relative Humidity Below 60% RH In Reels 60qC 48 hours In Bulk 100qC 4 hours If the parts are not stored in dry conditions, they must be baked before reflow to prevent damage to the parts. Baking should only be done once. 23 No Time from unsealing to soldering After removal from the bag, the parts should be soldered within 168 hours if stored at the recommended storage conditions. If times longer than 168 hours are needed, the parts must be stored in a dry box. Recommended Reflow Profile MAX 260C T - TEMPERATURE (°C) 255 R3 230 217 200 180 150 120 R2 R4 60 sec to 120 sec Above 217 C R5 R1 80 25 0 50 P1 HEAT UP Process Zone 100 150 200 P3 SOLDER REFLOW P2 SOLDER PASTE DRY Symbol 250 P4 COOL DOWN Maximum 'T/ 'time or Duration 'T Heat Up P1, R1 25°C to 150°C 3°C/s Solder Paste Dry P2, R2 150°C to 200°C 100s to 180s Solder Reflow P3, R3 P3, R4 200°C to 260°C 260°C to 200°C 3°C/s -6°C/s Cool Down P4, R5 200°C to 25°C -6°C/s > 217°C 60s to 120s Peak Temperature 260°C – Time within 5°C of actual Peak Temperature > 255°C 20s to 40s Time 25°C to Peak Temperature 25°C to 260°C 8mins Time maintained above liquidus point, 217°C The reflow profile is a straight-line representation of a nominal temperature profile for a convective reflow solder process. The temperature profile is divided into four process zones, each with different 'T/'time temperature change rates or duration. The 'T/'time rates or duration are detailed in the above table. The temperatures are measured at the component to printed circuit board connections. In process zone P1, the PC board and component pins are heated to a temperature of 150°C to activate the flux in the solder paste. The temperature ramp up rate, R1, is limited to 3°C per second to allow for even heating of both the PC board and component pins. Process zone P2 should be of sufficient time duration (100 to 180 seconds) to dry the solder paste. The temperature is raised to a level just below the liquidus point of the solder. Process zone P3 is the solder reflow zone. In zone P3, the 300 t-TIME (SECONDS) temperature is quickly raised above the liquidus point of solder to 260°C (500°F) for optimum results. The dwell time above the liquidus point of solder should be between 60 and 120 seconds. This is to assure proper coalescing of the solder paste into liquid solder and the formation of good solder connections. Beyond the recommended dwell time the intermetallic growth within the solder connections becomes excessive, resulting in the formation of weak and unreliable connections. The temperature is then rapidly reduced to a point below the solidus temperature of the solder to allow the solder within the connections to freeze solid. Process zone P4 is the cool down after solder freeze. The cool down rate, R5, from the liquidus point of the solder to 25°C (77°F) should not exceed 6°C per second maximum. This limitation is necessary to allow the PC board and component pins to change dimensions evenly, putting minimal stresses on the component. It is recommended to perform reflow soldering no more than twice. For product information and a complete list of distributors, please go to our web site: www.avagotech.com Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries. Data subject to change. Copyright © 2005-2010 Avago Technologies. All rights reserved. AV02-2573EN - September 6, 2010