VEML6040 Datasheet by Vishay Semiconductor Opto Division

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RGBW Color Sensor with I2C Interface
DESCRIPTION
VEML6040 color sensor senses red, green, blue, and white
light and incorporates photodiodes, amplifiers, and analog /
digital circuits into a single chip using CMOS process. With
the color sensor applied, the brightness, and color
temperature of backlight can be adjusted base on ambient
light source that makes panel looks more comfortable for
end user’s eyes. VEML6040’s adoption of FiltronTM
technology achieves the closest ambient light spectral
sensitivity to real human eye responses.
VEML6040 provides excellent temperature compensation
capability for keeping the output stable under changing
temperature. VEML6040’s function are easily operated
via the simple command format of I2C (SMBus compatible)
interface protocol. VEML6040’s operating voltage ranges
from 2.5 V to 3.6 V. VEML6040 is packaged in a
lead (Pb)-free 4 pin OPLGA package which offers the
best market-proven reliability.
FEATURES
Package type: surface mount
Dimensions (L x W x H in mm): 2.0 x 1.25 x 1.0
• Integrated modules: color sensor (RGBW) and
signal conditioning IC
•Filtron
TM technology provides a spectrum
matching real human eye responses
Supports low transmittance (dark) lens design
Fluorescent light flicker immunity
Provides 16-bit resolution for each channel
(R, G, B, W)
Selectable maximum detection range (515.4, 1031,
2062, 4124, 8248, or 16 496) lux with highest sensitivity
0.007865 lux/step
Package: OPLGA
Temperature compensation: -40 °C to +85 °C
Low power consumption I2C (SMBus compatible)
interface
Floor life: 168 h, MSL 3, according to J-STD-020
Output type: I2C bus
Operation voltage: 2.5 V to 3.6 V
Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
APPLICATIONS
Handheld device
• Notebook
Consumer device
Industrial and mechanical application
Note
(1) Adjustable through I2C interface
Note
(1) MOQ: minimum order quantity
PRODUCT SUMMARY
PART NUMBER
OPERATING
VOLTAGE RANGE
(V)
I2C BUS
VOLTAGE RANGE
(V)
PEAK SENSITIVITY
(nm)
RANGE OF SPECTRAL
BANDWIDTH λ0.5
(nm)
OUTPUT CODE
VEML6040 2.5 to 3.6 1.7 to 3.6 650, 550, 450 (R, G, B) ± 35, ± 35, ± 40 (R, G, B) 16 bit, I2C
ORDERING INFORMATION
ORDERING CODE PACKAGING VOLUME (1) REMARKS
VEML6040A3OG Tape and reel MOQ: 2500 pcs 2.0 mm x 1.25 mm x 1.0 mm
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BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS (Tamb = 25 °C, unless otherwise specified)
PARAMETER TEST CONDITION SYMBOL MIN. MAX. UNIT
Supply voltage VDD 03.6V
Operation temperature range Tamb -40 +85 °C
Storage temperature range Tstg -40 +85 °C
RECOMMENDED OPERATING CONDITIONS (Tamb = 25 °C, unless otherwise specified)
PARAMETER TEST CONDITION SYMBOL MIN. MAX. UNIT
Supply voltage VDD 2.5 3.6 V
Operation temperature range Tamb -40 +85 °C
I2C bus operating frequency f(I2CCLK) 10 400 kHz
PIN DESCRIPTIONS
PIN ASSIGNMENT SYMBOL TYPE FUNCTION
1 GND I Ground
2 SDAT I / O (open drain) I2C data bus data input / output
3SCLKII
2C digital bus clock input
4V
DD I Power supply input
VDD
SCLSDA
GND 1
2
4
3
R
G
B
W
VEML6040
Output buffer
I2C interface
Control logic
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Notes
(1) Test condition: VDD = 3.3 V, temperature: 25 °C
(2) Light source: white LED
(3) LED spectrum given in fig. 1; IT = 160 ms
Fig. 1 - Normalized Spectral Response of Used LEDs for Measuring the Irradiance Responsivity
BASIC CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)
PARAMETER TEST CONDITION SYMBOL MIN. TYP. MAX. UNIT
Supply voltage VDD 2.5 - 3.6 V
Supply current IDD - 200 - μA
I2C signal input
Logic high VDD = 3.3 V VIH 1.5 - - V
Logic low VIL --0.8
Logic high VDD = 2.6 V VIH 1.4 - - V
Logic low VIL --0.6
Peak sensitivity wavelength
λPR - 650 - nm
λPG - 550 - nm
λPB - 450 - nm
Irradiance responsivity
λPR = 619 nm (3) -96-
counts/(μW/cm2)λPG = 518 nm (3) -74-
λPB = 467 nm (3) -56-
Detectable intensity Minimum G channel, IT = 1280 ms (1)(2) - 0.007865 - lx
Maximum G channel, IT = 40 ms (1)(2) - 16 496 -
Dark offset G channel, IT = 80 ms (1) 0-3
Operating temperature range Tamb -40 - +85 °C
Shutdown current Light condition = dark, VDD = 3.6 V IDD - 800 - nA
10
100
1000
10000
0
0.2
0.4
2.0
150 900
Average Gain 1
Transient Thermal Impedance
Transient Thermal Impedance
Relative Responsivity (µW/cm2)
Power (W)
2nd line
Wavelength (nm)
700650600550500450400350300250200
1.8
1.0
0.8
0.6
Blue
Red
Green
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Fig. 2 - I2C Bus Timing Diagram
I2C BUS TIMING CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)
PARAMETER SYMBOL STANDARD MODE FAST MODE UNIT
MIN. MAX. MIN. MAX.
Clock frequency f(SMBCLK) 10 100 10 400 kHz
Bus free time between start and stop condition t(BUF) 4.7 - 1.3 - μs
Hold time after (repeated) start condition;
after this period, the first clock is generated t(HDSTA) 4.0 - 0.6 - μs
Repeated start condition setup time t(SUSTA) 4.7 - 0.6 - μs
Stop condition setup time t(SUSTO) 4.0 - 0.6 - μs
Data hold time t(HDDAT) 300 - 90 - ns
Data setup time t(SUDAT) 250 - 100 - ns
I2C clock (SCK) low period t(LOW) 4.7 - 1.3 - μs
I2C clock (SCK) high period t(HIGH) 4.0 - 0.6 - μs
Detect clock / data low timeout t(TIMEOUT) 25 35 - - ms
Clock / data fall time t(F) - 300 - 300 ns
Clock / data rise time t(R) - 1000 - 300 ns
VIH
VIH
t(LOW)
VIL
t(R)
t(HDSTA)
t(BUF)
VIL
t(HDDAT)
t(F)
t(HIGH) t(SUSTA)
t(SUDAT)
t(SUSTO)
I2CBus
CLOCK
(SCLK)
I2CBus
DATA
(SDAT)
P
Stop Condition
S
Star Condition
PS
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PARAMETER TIMING INFORMATION
Fig. 3 - I2C Bus Timing for Sending Word Command Format
Fig. 4 - I2C Bus Timing for Receiving Word Command Format
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TYPICAL PERFORMANCE CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)
Fig. 5 - Normalized Spectral Response
Fig. 6 - Normalized Output vs. View Angle
APPLICATION INFORMATION
Pin Connection with the Host
VEML6040 integrates R, G, B, and W sensor together with I2C interface. It is very easy for the baseband (CPU) to access
VEML6040 output data via I2C interface without extra software algorithms. The hardware schematic is shown in the following
diagram.
The 0.1 μF capacitor near the VDD pin is used for power supply noise rejection. The 2.2 kΩs are suitable for the pull-up resistors
of I2C.
Fig. 7 - Hardware Pin Connection Diagram
10
100
1000
10000
0
0.1
0.4
1.0
400 1000
Average Gain 1
Transient Thermal Impedance
Transient Thermal Impedance
Relative Responsivity (µW/cm2)
Normalized Response
2nd line
Wavelength (nm)
950900850800750700650600550500450
0.9
0.8
0.7
0.6
Blue
Red
Green
0.5
0.3
0.2
White
SDA (2)
SCL (3)
GND (1)
VDD (4)
C1
100 nF
2.5 V to 3.6 V
1.7 V to 3.6 V
R2R1
VEML6040
I2C bus data SDA
I2C bus clock SCL
Host
Micro Controller
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Digital Interface
The VEML6040 contains a CONF register (00h) used for operation control and parameter setup. Measurement results are stored
in four separate registers, one each for red, green, blue, and white respectively (08h to 0Bh). All registers are accessible via I2C
communication. Figure 8 shows the basic I2C communication with the VEML6040. Each of the registers in the VEML6040 are
16 bit wide, so 16 bit should be written when a write command is sent, and 16 bit should be read when a read command is sent.
The built in I2C interface is compatible with I2C modes “standard” and “fast”: 100 kHz to 400 kHz
Fig. 8 - Command Protocol Format
Note
Please note the repeat start condition when data is read from the sensor. A stop condition should not be sent here.
Slave Address and Function Description
VEML6040 uses 10h slave address for 7-bit I2C addressing protocol. VEML6040 has 16-bit resolution for each channel (R, G,
B, and W) that provides sensitivity up to 0.0056 lux/step for G, which is advantageous under a low transmittance lens design
(dark lens).
Note
Slave address is 7-bit addressing protocol
TABLE 1 - SLAVE ADDRESS AND COMMAND CODE DESCRIPTION
SLAVE ADDRESS 0x10
COMMAND
CODE
DATE BYTE
LOW / HIGH
REGISTER
NAME R / W BIT
76543210
00h L CONF R / W 0 IT (2 : 0) 0 TRIG AF SD
H Reserved R / W Reserved
01h to 07h L Reserved R / W Reserved
H Reserved R / W Reserved
08h L R_DATA R R_Data (7 : 0)
H R_DATA R R_Data (15 : 8)
09h L G_DATA R G_Data (7 : 0)
H G_DATA R G_Data (15 : 8)
0Ah L B_DATA R B_Data (7 : 0)
H B_DATA R B_Data (15 : 8)
0Bh L W_DATA R W_Data (7 : 0)
H W_DATA R W_Data (15 : 8)
SSlave address
Wr
ACommand code AData byte low AData byte high A
17 811 1 818
P
11
Send Word ɦġWrite Command to VEML6040
1
Slave address
7
Wr
ACommand code A S Slave address
Rd
AData byte low AData byte high A P
11811711818 11
S
Receive Word ɦġRead Data from VEML6040
S = start condition
P = stop condition
A = acknowledge
Shaded area = VEML6040 acknowledge
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Configuration Register Format
VEML6040 has a 16-bit configuration register for controlling. The description of each command format is shown in the following
tables.
TABLE 2-1 - COMMAND CODE 00H BITS DESCRIPTION
SLAVE ADDRESS: 0x10; REGISTER NAME: CONF; COMMAND CODE: 00H / DATA BYTE LOW
XITXTRIGAFSD
BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
0IT2IT1IT00TRIGAFSD
DESCRIPTION
IT Integration time setting
TRIG Proceed one detecting cycle at manual force mode
AF Auto / manual force mode
SD Chip shutdown setting
TABLE 2-2 - COMMAND CODE 00H REGISTER SETTING
BITS SETTING DESCRIPTION BITS SETTING DESCRIPTION
BIT 7 Default = 0 BIT 3 Default = 0
BIT 6, 5, 4
IT (2 : 0)
(0 : 0 : 0) = 40 ms BIT 2
TRIG
0 = no trigger
(0 : 0 : 1) = 80 ms 1 = trigger one time detect cycle
(0 : 1 : 0) = 160 ms BIT 1
AF
0 = auto mode
(0 : 1 : 1) = 320 ms 1 = force mode
(1 : 0 : 0) = 640 ms BIT 0
SD
0 = enable color sensor
(1 : 0 : 1) = 1280 ms 1 = disable color sensor
TABLE 3-1 - RESERVE COMMAND CODE DESCRIPTION
RESERVED COMMAND CODE: 00H / DATA BYTE HIGH
Command Bit Description
Reserved 7 : 0 Default = 0x00
TABLE 3-2 - RESERVE COMMAND CODE DESCRIPTION
RESERVED COMMAND CODE: 01H TO 07H
Command Bit Description
Reserved 7 : 0 Default = 0x00
TABLE 4 - READ OUT COMMAND CODE DESCRIPTION
REGISTER COMMAND CODE BIT DESCRIPTION
R_DATA 0x08_L (08H data byte low) 7 : 0 0x00 to 0xFF, R channel LSB output data
0x08_H (08H data byte high) 7 : 0 0x00 to 0xFF, R channel MSB output data
G_DATA 0x09_L (09H data byte low) 7 : 0 0x00 to 0xFF, G channel LSB output data
0x09_H (09H data byte high) 7 : 0 0x00 to 0xFF, G channel MSB output data
B_DATA 0x0A_L (0AH data byte low) 7 : 0 0x00 to 0xFF, B channel LSB output data
0x0A_H (0AH data byte high) 7 : 0 0x00 to 0xFF, B channel MSB output data
W_DATA 0x0B_L (0BH data byte low) 7 : 0 0x00 to 0xFF, W channel LSB output data
0x0B_H (0BH data byte high) 7 : 0 0x00 to 0xFF, W channel MSB output data
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Data Access
Each of the R, G, B, and W result registers has a 16-bit resolution (2 bytes). One byte is the LSB and the other byte is the MSB.
The host needs to follow the read word protocol as shown in figure 7. The data format shows as below.
Note
Data byte low represents LSB and data byte high represents MSB.
The integration time settings result in the corresponding resolutions that are shown in table 6.
Data Auto-Memorization
VEML6040 keeps the last results read. These values will remain in the registers, and can be read from these registers, until the
device wakes up and a new measurement is made.
Lux and CCT Calculation
In order to use the results to calculate the lux or correlated color temperature, please refer to the “Designing the VEML6040 into
an Application” application note (www.vishay.com/doc?84331).
TABLE 5 - 16-BIT DATA FORMAT
VEML6040 16-BIT DATA FORMAT
Data bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Data byte low
Data byte high
TABLE 6 - G CHANNEL RESOLUTION AND MAXIMUM DETECTION RANGE
IT SETTINGS G SENSITIVITY MAX. DETECTABLE LUX
IT (2 : 0) INTEGRATION TIME
(0 : 0 : 0) 40 ms 0.25168 16 496
(0 : 0 : 1) 80 ms 0.12584 8248
(0 : 1 : 0) 160 ms 0.06292 4124
(0 : 1 : 1) 320 ms 0.03146 2062
(1 : 0 : 0) 640 ms 0.01573 1031
(1 : 0 : 1) 1280 ms 0.007865 515.4
Slave address
Wr
ACommand code A S Slave address
Rd
AData byte low AData byte high A P
S
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PACKAGE INFORMATION in millimeters
Fig. 9 - VEML6040 A3OG Package Dimensions
LAYOUT NOTICE AND REFERENCE CIRCUIT in millimeters
Fig. 10 - VEML6040 PCB Layout Footprint
RECOMMENDED STORAGE AND REBAKING CONDITIONS
PARAMETER CONDITIONS MIN. MAX. UNIT
Storage temperature 5 50 °C
Relative humidity - 60 %
Open time - 168 h
Total time From the date code on the aluminized envelope (unopened) - 12 months
Rebaking Tape and reel: 60 °C - 22 h
Tube: 60 °C - 22 h
0.70
TOP VIEW
SIDE VIEW
XX
2.00 ± 0.15
1
23
4
1.25 ± 0.15
0.450.56
DIE
32
1
0.25
30um ± 10 um
0.45 ± 0.05 1.10
0.55 ± 0.05
1.0
0.35 ± 0.05
XX
4
1± 0.10
0~0.05
0~0.06
0~0.02
0~0.04
0.1
1.00± 0.15
0.1
0.625± 0.15
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RECOMMENDED INFRARED REFLOW
Soldering conditions which are based on J-STD-020 C
Recommend Normal Solder Reflow is 235 °C to 255 °C
Fig. 11 - VEML6040 OPLGA Solder Reflow Profile Chart
RECOMMENDED IRON TIP SOLDERING CONDITION AND WARNING HANDLING
1. Solder the device with the following conditions:
1.1. Soldering temperature: 400 °C (max.)
1.2. Soldering time: 3 s (max.)
2. If the temperature of the method portion rises in addition to the residual stress between the leads, the possibility that an
open or short circuit occurs due to the deformation or destruction of the resin increases.
3. The following methods: VPS and wave soldering, have not been suggested for the component assembly.
4. Cleaning method conditions:
4.1. Solvent: methyl alcohol, ethyl alcohol, isopropyl alcohol
4.2. Solvent temperature < 45 °C (max.)
4.3. Time: 3 min (min.)
IR REFLOW PROFILE CONDITION
PARAMETER CONDITIONS TEMPERATURE TIME
Peak temperature 255 °C + 0 °C / - 5 °C (max.: 260 °C) 10 s
Preheat temperature range and timing 150 °C to 200 °C 60 s to 180 s
Timing within 5 °C to peak temperature - 10 s to 30 s
Timing maintained above temperature / time 217 °C 60 s to 150 s
Timing from 25 °C to peak temperature - 8 min (max.)
Ramp-up rate 3 °C/s (max.) -
Ramp-down rate 6 °C/s (max.) -
Temperature (ºC)
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TAPE PACKAGING INFORMATION in millimeters
Fig. 12 - VEML6040 A3OG Package Carrier Tape Fig. 13 - Taping Direction
Fig. 14 - Reel Dimensions
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