VEML6070
www.vishay.com
Vishay Semiconductors
UV Light Sensor with I2C Interface
FEATURES
?Package type: surface mount
?Dimensions (L x W x H in mm): 2.35 x 1.8 x 1.0?Integrated modules: ultraviolet sensor (UV), and signal conditioning IC
?Converts solar UV light intensity to digital data?Excellent UV sensitivity and linearity via FiltronTM technology
?Excellent performance of UV radiation measurement under long time solar UV exposure
DESCRIPTION
VEML6070 is an advanced ultraviolet (UV) light sensor with I2C protocol interface and designed by the CMOS process. It is easily operated via a simple I2C command. The active acknowledge (ACK) feature with threshold windows setting allows the UV sensor to send out a UVI alert message. Under a strong solar UVI condition, the smart ACK signal can be easily implemented by the software programming.VEML6070 incorporates a photodiode, amplifiers, and analog / digital circuits into a single chip. VEML6070’s adoption of FiltronTM UV technology provides the best spectral sensitivity to cover UV spectrum sensing. It has an excellent temperature compensation and a robust refresh rate setting that does not use an external RC low pass filter. VEML6070 has linear sensitivity to solar UV light and is easily adjusted by an external resistor. Software shutdown mode is provided, which reduces power consumption to be less than 1 μA. VEML6070’s operating voltage ranges from 2.7 V to 5.5 V.
?Excellent temperature compensation?High dynamic detection resolution?Standard I2C protocol interface?Support acknowledge feature (ACK)
?Immunity on fluorescent light flicker software shutdown mode control?Package: OPLGA
?Temperature compensation: -40 °C to +85 °C?Output type: I2C bus
?Operation voltage: 2.7 V to 5.5 V
?Material categorization: for definitions of compliance please see www.vishay.com/doc?99912
APPLICATIONS
?Solar UV indicator
?Cosmetic / outdoor sport handheld product?Consumer products
PRODUCT SUMMARY
PART NUMBERVEML6070
OPERATINGVOLTAGE RANGE
(V)
2.7 to 5.5
I2C BUS
VOLTAGE RANGE
(V)
1.7 to 5.5
PEAK SENSITIVITY
(nm)
355
RANGE OF SPECTRAL BANDWIDTH λ0.5
(nm)
± 20
OUTPUT CODE16 bit, I2C
Note
(1)Adjustable through I2C interface
ORDERING INFORMATION
ORDERING CODEVEML6070
(1)
PACKAGINGTape and reel
VOLUME (1)MOQ: 2500 pcs
REMARKS
2.35 mm x 1.8 mm x 1.0 mm
Note
MOQ: minimum order quantity
ABSOLUTE MAXIMUM RATINGS (Tamb = 25 °C, unless otherwise specified)
PARAMETERSupply voltage
Operation temperature rangeRev. 1.2, 27-Feb-15
TEST CONDITION
SYMBOLVDDTamb
MIN.0-40
MAX.6.0+85
UNITV°C
1
For technical questions, contact: sensorstechsupport@vishay.comTHIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000Document Number: 84277
VEML6070
www.vishay.com
Vishay Semiconductors
TEST CONDITION
SYMBOLVDDTambf(I2CCLK)
MIN.2.7-4010
MAX.5.5+85400
UNITV°CkHz
RECOMMENDED OPERATING CONDITIONS (Tamb = 25 °C, unless otherwise specified)
PARAMETERSupply voltage
Operation temperature rangeI2C bus operating frequency
PIN DESCRIPTIONS
PIN ASSIGNMENT123456
SYMBOLGNDACKSDASETSCLVDD
IITYPEI
O (open drain)I / O (open drain)
FUNCTION
Power supply ground, all voltage are reference to GND
Acknowledge pin
I2C digital serial data output to the hostLight reading adjustment, connect a resistor to GND
I2C digital serial clock input from the host
Supply voltage
BLOCK DIAGRAM
VEML6070
GND1
Temperature SensorUV-PD
Output buffer12C InterfaceLow PassFilter
6
VDD
ACK25SCL
TimingController
SDA3
Oscillator
4SET
BASIC CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)
PARAMETER
Supply operation voltageSupply currentI2C signal input
Logic highLogic low
RSET = 270 kΩ (1)(2)
(1)(2)
TEST CONDITIONSYMBOLVDDIDDVIHVILλpλ
MIN.2.7
TYP.100
MAX.5.5250VDD0.8
UNITVμAVnm
1.5
355
2800
121
Peak sensitivity wavelengthRange of spectral sensitivityDark offsetOutput offsetShutdown current
RSET = 200 kΩ, IT = 1T (1)RSET = 200 kΩ, IT = 1T (1)(3)Light condition = dark (1)
400515
nmstepsstepsμA
IDD
Notes
(1)Test condition: V = 3.3 V, temperature: 25°CDD
(2)Light source: solar light source(3)Ambient light intensity = 500 lx
Rev. 1.2, 27-Feb-15
2
For technical questions, contact: sensorstechsupport@vishay.comTHIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000Document Number: 84277
VEML6070
www.vishay.com
Vishay Semiconductors
STANDARD MODEMIN.104.74.04.74.0
3450
2504.74.025
353001000
t(F)I2C TIMING CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)
PARAMETERClock frequency
Bus free time between start and stop conditionHold time after (repeated) start condition; after this period, the first clock is generatedRepeated start condition setup timeStop condition setup timeData hold timeData setup time
I2C clock (SCK) low periodI2C clock (SCK) high periodDetect clock / data low timeoutClock / data fall timeClock / data rise time
t(LOW)t(R)SYMBOLf(SMBCLK)t(BUF)t(HDSTA)t(SUSTA)t(SUSTO)t(HDDAT)t(SUDAT)t(LOW)t(HIGH)t(TIMEOUT)
t(F)t(R)
FAST MODEMIN.101.30.60.60.6
900
1001.30.6
300300MAX.400
MAX.100
UNITkHzμsμsμsμsnsnsμsμsmsnsns
I2C Bus CLOCK(SCL)VIHVILt(HDSTA)t(BUF)t(HDDAT)t(HIGH)t(SUSTA)t(SUDAT)t(SUSTO)I2C Bus DATA(SDA)VIHVIL{{PStop Condition{SStart ConditionStartSStopt(LOSEXT)SCLACKSDAACKt(LOWMEXT)I2C Bus CLOCK(SCL)t(LOWMEXT)t(LOWMEXT)I2C Bus DATA(SDA)Fig. 1 - I2C Timing Diagram
Rev. 1.2, 27-Feb-15
3
For technical questions, contact: sensorstechsupport@vishay.comTHIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000Document Number: 84277
{PVEML6070
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PARAMETER TIMING INFORMATION
I2C Bus CLOCK(SCL)Vishay Semiconductors
I2C Bus DATA(SDA)Start by MasterSA7SA6SA5SA4SA3SA2SA1WDA7DA7DA5DA4DA3DA2DA1DA0ACK byVEML6070I2C Bus Slave Address ByteCommand ByteACK byStop byVEML6070MasterFig. 2 - Timing for Send Byte Command Format
I2C Bus CLOCK(SCL)I2C Bus DATA(SDA)Start by MasterSA7SA6SA5SA4SA3SA2SA1RDA7DA6DA5DA4DA3DA2DA1DA0ACK byVEML6070I2C Bus Slave Address ByteACK byStop byMasterMasterVEML6070 Data ByteFig. 3 - I2C Timing for Receive Byte Command Format
TYPICAL PERFORMANCE CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)
Axis Title100901.110000View Angle OPLGA package2nd lineNormalized Output (%)80706050403020100300350400450500550600λ-Wavelength (nm)2nd line10-90-80-70-60-50-40-30-20-10110001st line2nd lineNormalized Output0.90.80.70.60.50.40.30.20.100201040506070308090CM3512 UVSCM3623 ALSIdeal Cosine100View AngleFig. 4 - Normalized Spectral ResponseFig. 5 - Normalized Output vs. View Angle
Rev. 1.2, 27-Feb-15
4
For technical questions, contact: sensorstechsupport@vishay.comTHIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000Document Number: 84277
VEML6070
www.vishay.com
Vishay Semiconductors
CM3512 Refresh TimeTemperature vs. IDD125115IDD (uA)105958575102030405060708090100110Temperature5004754504254003753503253002752502252001751501251007550250Time (ms)0501001502002505506006507003504004505008509009501000105030075080011001150Rset (Kohm)Fig. 6 - IDD vs.Temperature
Fig. 7 - Refresh Time
APPLICATION INFORMATION
Pin Connection with the Host
VEML6070 is a cost effective solution for ultraviolet light sensing with I2C interface. The standard serial digital interface easily accesses “UV light intensity” digital data.
The additional capacitor near the VDD pin is used for power supply noise rejection. For the I2C bus design, the pull-up voltage refers to the I/O of the baseband due to the “open drain” design. The pull-up resistors for the I2C bus design are recommended to be 2.2 kΩ. The circuit diagram as an example is shown in figure 8.
1.7 V to 5.5 VR1R2R3GND (1)2.7 V to 5.5 VR410R10 μFC1C2100 nFVDD (6)HostMicro ControllerVEML6070SDA (3)I2C Bus Data SDAI2C Bus Clock SCLGPIO (INT)C1 andR4areoptional forverydisturbedsupplyR5RSET (4)270KSCL (5)ACK (2)Fig. 8 - Hardware Pin Connection Diagram
Rev. 1.2, 27-Feb-15
5
For technical questions, contact: sensorstechsupport@vishay.comTHIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000Document Number: 84277
1200