veml6070

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

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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

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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

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