ISL29034IROZ-T7 [RENESAS]
Integrated Digital Light Sensor;
| 型号： | ISL29034IROZ-T7 |
| 厂家： | 
RENESAS TECHNOLOGY CORP |
| 描述： | Integrated Digital Light Sensor 光电二极管 |
| 文件： | 总14页 (文件大小：697K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DATASHEET
ISL29034
Integrated Digital Light Sensor
FN8370
Rev 2.00
August 19, 2016
The ISL29034 is an integrated ambient and infrared
light-to-digital converter with I2C (SMBus compatible) interface. Its
advanced self-calibrated photodiode array emulates human eye
response with excellent IR rejection. The on-chip ADC is capable
of rejecting 50Hz and 60Hz flicker caused by artificial light
sources. The Lux range select feature allows users to program the
Lux range for optimized counts/Lux.
Features
• Resolution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-bit ADC
• Wide dynamic range1: . . . . . . . . . . . . . . . . . . . . . . . . . . 4,200,000
• Integrated noise reduction . . . . . . . . . . . . . . . . . . . . . 50/60Hz
• Close to human eye response with excellent IR/UV rejection
• Shutdown modes. . . . . . . . . . . . . . . . . . . .software and automatic
• Supply current (typical) . . . . . . . . . . . . . . . . . . . . . . . . . . . 57µA
• Shutdown current (maximum) . . . . . . . . . . . . . . . . . . . 0.51µA
• I2C (SMB compatible) power supply . . . . . . . . . 1.7V to 3.63V
• Sensor power supply . . . . . . . . . . . . . . . . . . . . .2.25V to 3.63V
• Operating temperature range. . . . . . . . . . . . . -40°C to +85°C
• Small form factor package. . . . . . . 4 Ld 1.5x1.3x0.75 ODFN
For ambient light sensing, an internal 16-bit ADC has been
designed based upon the charge-balancing technique. The
ADC conversion time is nominally 105ms and is user
selectable from 11µs to 105ms, depending on oscillator
frequency and ADC resolution. In normal operation, typical
current consumption is 57µA. In order to further minimize
power consumption, two power-down modes have been
provided. If polling is chosen over continuous measurement of
light, the auto power-down function shuts down the whole chip
after each ADC conversion for the measurement. The other
power-down mode is controlled by software via the I2C
interface. The power consumption can be reduced to less than
0.3µA when powered down.
Applications
• Mobile devices: smart phone, PDA, GPS
• Computing devices: notebook PC, MacBook, tablets
• Consumer devices: LCD-TV, digital picture frame, digital camera
• Industrial and medical light sensing
The ISL29034 supports a software brownout condition
detection. The device powers up with the brownout bit asserted
until the host clears it through the I2C interface. Designed to
operate on supplies from 2.25V to 3.63V with an I2C supply from
1.7V to 3.63V, the ISL29034 is specified for operation across the
-40°C to +85°C ambient temperature range.
Related Literature
• AN1591, “Evaluation Hardware/Software Manual for ALS
and Proximity Sensor”
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
NUMBER OF
PART NUMBER ALS SENSING INTERRUPT PIN
PINS
4 Ld
6 Ld
ISL29034
ISL29035
Yes
Yes
No
Yes
1.2
1.0
0.8
0.6
0.4
0.2
0
100
VDD
VDD_PULLUP
4.7k
1µF
HUMAN EYE
1
4.7k
AMBIENT LIGHT SENSOR
VDD
SDA
SCL
SDA
4
3
ISL29034
MCU
SCL
GND
2
300
400
500
600
700
800
900
1000 1100
WAVELENGTH (nm)
FIGURE 2. NORMALIZED SPECTRAL RESPONSE FOR AMBIENT
LIGHT SENSING
FIGURE 1. ISL29034 TYPICAL APPLICATION DIAGRAM
FN8370 Rev 2.00
August 19, 2016
Page 1 of 14
ISL29034
Block Diagram
VDD
1
IREF
fOSC
COMMAND
REGISTER
R
3
4
SCL
SDA
500k
I2C/SMB
PHOTODIODE
ARRAY
LIGHT
DATA
PROCESS
INTEGRATING
ADC
DATA
REGISTER
ISL29034
2
GND
FIGURE 3. BLOCK DIAGRAM
Pin Configuration
Pin Descriptions
ISL29034
(4 LD ODFN)
TOP VIEW
PIN
NUMBER PIN NAME
DESCRIPTION
1
2
3
4
VDD
GND
SCL
Positive supply
Ground pin
VDD
GND
1
2
4
3
SDA
SCL
I2C serial clock.
I2C serial data.
SDA
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
TEMP RANGE
TAPE AND REEL
(UNITS)
PACKAGE
(RoHS COMPLIANT)
PKG.
DWG. #
(°C)
ISL29034IROZ-T7
-40 to +85
3k
4 Ld ODFN
L4.1.5x1.3
ISL29034IROZ-EVALZ
NOTES:
Evaluation Board
1. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and NiPdAu plate
- e4 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL29034. For more information on MSL please see tech brief TB477.
FN8370 Rev 2.00
August 19, 2016
Page 2 of 14
ISL29034
Absolute Maximum Ratings
Thermal Information
VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +4.0V
I2C Bus (SCL, SDA) Pin Voltage. . . . . . . . . . . . . . . . . . . . . . . . . -0.2V to 4.0V
I2C Bus (SCL, SDA) Pin Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <10mA
Input Voltage Slew Rate (Maximum) . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.1V/µs
ESD Ratings
Thermal Resistance (Typical)
JA (°C/W)
287
4 Ld ODFN Package (Note 4) . . . . . . . . . . . . . . . . . . . . .
Maximum Junction Temperature (TJMAX). . . . . . . . . . . . . . . . . . . . . . .+90°C
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40°C to +85°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB477
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3kV
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTE:
4. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications VDD = 3.0V, TA = +25°C, 16-bit ADC operation, unless otherwise specified.
MIN
MAX
PARAMETER
Power Supply Range
SYMBOL
VDD
TEST CONDITIONS
(Note 7)
TYP
(Note 7)
UNIT
V
2.25
3.63
85
Supply Current
IDD
57
µA
Supply Current when Powered Down
Supply Voltage Range for I2C Interface
ADC Integration/Conversion Time
I2C Clock Rate Range
IDD1
Software disabled or auto power-down
16-bit ADC data
0.24
0.51
3.63
µA
VI2C
1.70
V
tint
105
400
1
ms
FI2C
kHz
Counts
Counts
%
Count Output When Dark
DATA_0
DATA_F
%/Value
E = 0 Lux, Range 0 (1k Lux)
5
Full-Scale ADC Code
65535
Part-to-Part Variation (3 population)
E = 300 Lux, cold white LED
Range 0 (1k Lux)
±5
Light Count Output with LSB of 0.015 Lux/Count
Light Count Output with LSB of 0.06 Lux/Count
Light Count Output with LSB of 0.24 Lux/Count
Light Count Output with LSB of 0.96 Lux/Count
ADCR0
ADCR1
ADCR2
ADCR3
E = 300 Lux, fluorescent light (Note 5),
ALS Range 0 (1k Lux)
15000
20473
5100
1400
366
25000
Counts
Counts
Counts
Counts
E = 300 Lux, fluorescent light (Note 5),
ALS Range 1 (4k Lux)
E = 300 Lux, fluorescent light (Note 5),
ALS Range 2 (16k Lux)
E = 300 Lux, fluorescent light (Note 5),
ALS Range 3 (64k Lux)
Infrared Count Output (Note 6)
Infrared Count Output (Note 6)
Infrared Count Output (Note 6)
Infrared Count Output (Note 6)
SDA Current Sinking Capability
NOTES:
ADC_IRR0 Range 0 (1k Lux)
ADC_IRR1 Range 1 (4k Lux)
ADC_IRR2 Range 2 (16k Lux)
ADC_IRR3 Range 3 (64k Lux)
ISDA
1402
1997
481
148
42
2598
Counts
Counts
Counts
Counts
mA
4
5
5. 550nm green LED is used in production test. The 550nm LED irradiance is calibrated to produce the same DATA count against an illuminance level
of 300 Lux fluorescent light.
6. 850 nm IR LED is used in production test.
7. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
FN8370 Rev 2.00
August 19, 2016
Page 3 of 14
ISL29034
F
2
I C Interface Specifications VDD = 3.0V, TA = +25°C, 16-bit ADC operation, unless otherwise specified.
MIN
MAX
PARAMETER
SYMBOL
VIL
TEST CONDITIONS
(Note 7)
TYP
(Note 7)
0.55
UNIT
SDA and SCL Input Buffer LOW Voltage
SDA and SCL Input Buffer HIGH Voltage
SDA and SCL Input Buffer Hysteresis
V
V
V
VIH
1.25
0
VHys
(Note 8)
0.05 x VDD
0.06
SDA Output Buffer LOW Voltage
(open-drain), Sinking 4mA
VOL
(Note 8)
0.40
10
V
SDA and SCL Pin Capacitance
CPIN
TA = +25°C, f = 1MHz, VDD = 5V,
pF
(Note 8)
VIN = 0V, VOUT = 0V
SCL Frequency
fSCL
tIN
400
50
kHz
ns
Pulse Width Suppression Time at SDA and
SCL Inputs
Any pulse narrower than the maximum
specification is suppressed
SCL Falling Edge to SDA Output Data Valid
tAA
900
ns
ns
Time the Bus Must be Free Before the Start
of a New Transmission
tBUF
1300
Clock LOW Time
tLOW
tHIGH
1300
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Clock HIGH Time
600
START Condition Set-Up Time
START Condition Hold Time
Input Data Set-Up Time
Input Data Hold Time
tSU:STA
tHD:STA
tSU:DAT
tHD:DAT
tSU:STO
tHD:STO
tDH
600
600
100
30
STOP Condition Set-Up Time
STOP Condition Hold Time
Output Data Hold Time
SDA and SCL Rise Time
600
600
0
tR
20 + 0.1 x Cb
(Note 8)
SDA and SCL Fall Time
tF
20 + 0.1 x Cb
ns
pF
kΩ
(Note 8)
Capacitive Loading of SDA or SCL
SDA and SCL Bus Pull-Up Resistor Off-chip
Cb
(Note 10)
Total on-chip and off-chip
400
RPU
(Note 8)
Maximum is determined by tR and tF
For Cb = 400pF, maximum is about
2kΩ ~2.5kΩ
1
For Cb = 40pF, maximum is about
15kΩ ~ 20kΩ
NOTES:
8. Limits should be considered typical and are not production tested.
9. These are I2C specific parameters and are not tested, however, they are used to set conditions for testing devices to validate specification.
10. Cb is the capacitance of the bus in pF.
FN8370 Rev 2.00
August 19, 2016
Page 4 of 14
ISL29034
SDA vs SCL Timing
t
t
LOW
HIGH
t
t
HD:STO
t
F
R
SCL
t
SU:DAT
t
t
HD:DAT
t
SU:STA
SU:STO
t
HD:STA
SDA
(INPUT TIMING)
t
t
BUF
DH
t
AA
SDA
(OUTPUT TIMING)
FIGURE 4. I2C BUS TIMING
SCL
ACK
TH
SDA
8
BIT OF LAST BYTE
t
WC
STOP
CONDITION
START
CONDITION
FIGURE 5. I2C WRITE CYCLE TIMING
FN8370 Rev 2.00
August 19, 2016
Page 5 of 14
ISL29034
Typical Performance Curves
1.2
1.2
1.0
0.8
0.6
0.4
0.2
0
1.0
HUMAN EYE
0.8
AMBIENT LIGHT SENSOR
0.6
0.4
0.2
0
300
400
500
600
700
800
900
1000 1100
-60 -50 -40 -30 -20 -10
0
10 20 30 40 50 60
WAVELENGTH (nm)
ANGLE (°)
FIGURE 6. NORMALIZED SPECTRAL RESPONSE FOR AMBIENT
LIGHT SENSING
FIGURE 7. NORMALIZED RADIATION PATTERN
14
1000
800
600
400
12
1000 LUX RANGE
10
1000 LUX RANGE
8
6
4
2
0
200
0
-60 -50 -40 -30 -20 -10
0
10 20 30 40 50 60 70 80 90 100
0
200
400
600
800
1000
TEMPERATURE (°C)
AMBIENT LIGHT (LUX)
FIGURE 8. TEMPERATURE TEST IN DARK CONDITION
FIGURE 9. ALS TRANSFER FUNCTION
The ADC has I2C programmable range select to dynamically
accommodate various lighting conditions. For very dim
conditions, the ADC can be configured at its lowest range
(Range 0) in the ambient light sensing.
Principles of Operation
Photodiodes and ADC
The ISL29034 contains two photodiode arrays, which convert light
into current. A typical spectral response for ambient light sensing is
shown in Figure 6 on page 6. After light is converted to current
during the light signal process, the current output is converted to
digital by a built-in 16-bit Analog-to-Digital Converter (ADC). An I2C
command reads the ambient light intensity in counts.
Low-Power Operation
The ISL29034 initial operation is at the power-down mode after a
supply voltage is provided. The data registers contain the default
value at 0. When the ISL29034 receives an I2C command to do a
one-time measurement from an I2C master, it will start the ADC
conversion with light sensing. It will go to the power-down mode
automatically after one conversion is finished and keep the
conversion data available for the master to fetch anytime
afterwards. The ISL29034 will continuously do ADC conversion
with light sensing if it receives an I2C command of continuous
measurement. It will continuously update the data registers with
the latest conversion data. It will go to the power-down mode
after it receives the I2C command of power-down.
The converter is a charge-balancing integrating type 16-bit ADC. The
chosen method for conversion is best for converting small current
signals in the presence of an AC periodic noise. A 105ms integration
time, for instance, highly rejects 50Hz and 60Hz power line noise
simultaneously.
The integration time of the built-in ADC is determined by the internal
oscillator, and the n-bit (n = 4, 8, 12, 16) counter inside the ADC. A
good balancing act of integration time and resolution (depending on
the application) is required for optimal results.
FN8370 Rev 2.00
August 19, 2016
Page 6 of 14
ISL29034
SDA bus after transmitting 8 bits. During the ninth clock cycle,
the receiver pulls the SDA line LOW to acknowledge the reception
of the eight bits of data (refer to Figure 12). The ISL29034
responds with an ACK after recognition of a START condition
followed by a valid Identification Byte, and once again, after
successful receipt of an Address Byte. The ISL29034 also
responds with an ACK after receiving a Data byte of a write
operation. The master must respond with an ACK after receiving
a Data byte of a read operation.
Ambient Light and IR Sensing
There are four operational modes in ISL29034: Programmable
ALS once with auto power-down, programmable IR sensing once
with auto power-down, programmable continuous ALS sensing
and programmable continuous IR sensing. These four modes can
be programmed in series to fulfill the application needs. The
detailed program configuration is listed in “Command-I Register
(Address: 0x00)” on page 9.
When the part is programmed for ambient light sensing, the
ambient light with wavelength within the “Ambient Light
Sensing” spectral response curve in Figure 15 is converted into
current. With ADC, the current is converted to an unsigned n-bit
(up to 16 bits) digital output.
Device Addressing
Following a START condition, the master must output a Device
Address byte. The 7 MSBs of the Device Address byte are known as
the device identifier. The device identifier bits of the ISL29034 are
internally hard-wired as “1000100”. The LSB of the Device Address
byte is defined as a Read or Write (R/W) bit. When this R/W bit is a
“1”, a read operation is selected and when “0”, a write operation is
selected (refer to Figure 10). The master generates a START
condition followed by Device Address byte 1000100x (x as R/W)
and the ISL29034 compares it with the internal device identifier.
Upon a correct comparison, the device outputs an acknowledge
(LOW) on the SDA line (refer to Figure 12).
When the part is programmed for infrared (IR) sensing, the IR
light with wavelength within the “IR Sensing” spectral response
curve in Figure 15 is converted into current. With ADC, the
current is converted to an unsigned n-bit (up to 16 bits) digital
output.
Serial Interface
The ISL29034 supports the Inter-Integrated Circuit (I2C) bus data
transmission protocol. The I2C bus is a two-wire serial bidirectional
interface consisting of SCL (Clock) and SDA (Data). Both the wires
are connected to the device supply via pull-up resistors. The I2C
protocol defines any device that sends data onto the bus as a
transmitter and the receiving device as the receiver. The device
controlling the transfer is a master and the device being controlled is
the slave. The transmitting device pulls down the SDA line to
transmit a “0” and releases it to transmit a “1”. The master always
initiates the data transfer, only when the bus is not busy, and
provides the clock for both transmit and receive operations. The
ISL29034 operates as a slave device in all applications. The serial
communication over the I2C interface is conducted by sending the
Most Significant Bit (MSB) of each byte of data first.
D E VIC E A D D R E S S
B Y TE
R /W
A 0
1
0
0
0
1
0
0
R E G ISTE R
A D D R E S S B Y TE
A 7
D 7
A 6
D 6
A 5
D 5
A 4
D 4
A 3
D 3
A 2
D 2
A 1
D 1
D A TA B YT E
D 0
FIGURE 10. DEVICE ADDRESS, REGISTER ADDRESS AND DATA BYTE
Write Operation
BYTE WRITE
In a byte write operation, the ISL29034 requires the Device
Address byte, Register Address byte, and the Data byte. The
master starts the communication with a START condition. Upon
receipt of the Device Address byte, Register Address byte and the
Data byte, the ISL29034 responds with an Acknowledge (ACK).
Following the ISL29034 data acknowledge response, the master
terminates the transfer by generating a STOP condition.
Start Condition
During data transfer, the SDA line must remain stable while the SCL
line is HIGH. All I2C interface operations must begin with a START
condition, which is a HIGH to LOW transition of SDA while SCL is
HIGH (refer to Figure 12 on page 8). The ISL29034 continuously
monitors the SDA and SCL lines for the START condition and does
not respond to any command until this condition is met (refer to
Figure 12). A START condition is ignored during the power-up
sequence.
The ISL29034 then begins an internal write cycle of the data to
the volatile memory. During the internal write cycle, the device
inputs are disabled and the SDA line is in a high impedance state,
so the device will not respond to any requests from the master
(refer to Figure 11).
Stop Condition
All I2C interface operations must be terminated by a STOP
condition, which is a LOW to HIGH transition of SDA while SCL is
HIGH (refer to Figure 12). A STOP condition at the end of a
read/write operation places the device in its standby mode. If a
stop is issued in the middle of a Data byte, or before 1 full Data
byte + ACK is sent, then the serial communication of the
ISL29034 resets itself without performing the read/write. The
contents of the array are not affected.
BURST WRITE
The ISL29034 has a burst write operation, which allows the
master to write multiple consecutive bytes from a specific
address location. It is initiated in the same manner as the byte
write operation, but instead of terminating the write cycle after
the first Data byte is transferred, the master can write to the
whole register array. After the receipt of each byte, the ISL29034
responds with an acknowledge, and the address is internally
incremented by one. The address pointer remains at the last
address byte written. When the counter reaches the end of the
register address list, it “rolls over” and goes back to the first
Register Address.
Acknowledge
An Acknowledge (ACK) is a software convention used to indicate
a successful data transfer. The transmitting device releases the
FN8370 Rev 2.00
August 19, 2016
Page 7 of 14
ISL29034
S
T
A
R
T
S
T
O
P
DEVICE ADDRESS
BYTE
SIGNAL FROM
MASTER DEVICE
ADDRESS BYTE
DATA BYTE
1 0 0 0 1 0 0 0
SIGNAL AT SDA
A
C
K
A
C
K
A
C
K
SIGNALS FROM
SLAVE DEVICE
FIGURE 11. BYTE WRITE SEQUENCE
8th CLK
9th CLK
SCL FROM
MASTER
HIGH
SDA FROM
IMPEDANCE
TRANSMITTER
SDA FROM
RECEIVER
DATA
STABLE
DATA
STABLE
DATA
CHANGE
START
STOP
ACK
FIGURE 12. START, DATA STABLE, ACKNOWLEDGE AND STOP CONDITION
Read Operation
The ISL29034 has two basic read operations: Byte read and
Burst read.
Power-On Reset
The Power-On Reset (POR) circuitry protects the internal logic
against powering up in the incorrect state. The ISL29034 will
power-up into Standby mode after VDD exceeds the POR trigger
level and will power-down into Reset mode when VDD drops
below the POR trigger level. This bidirectional POR feature
protects the device against ‘brown-out’ failure following a
temporary loss of power.
BYTE READ
Byte read operations allow the master to access any register
location in the ISL29034. The Byte read operation is a two step
process. The master issues the START condition, and the Device
Address byte with the R/W bit set to “0”, receives an
acknowledge, then issues the Register Address byte. After
acknowledging receipt of the Register Address byte, the master
immediately issues another START condition and the Device
Address byte with the R/W bit set to “1”. This is followed by an
acknowledge from the device and then by the 8-bit data word.
The master terminates the read operation by not responding with
an acknowledge and then issuing a stop condition
The POR is an important feature because it prevents the
ISL29034 from starting to operate with insufficient voltage, prior
to stabilization of the internal bandgap. The ISL29034 prevents
communication to its registers and greatly reduces the likelihood
of data corruption on power-up.
(refer to Figure 13).
BURST READ
Burst read operation is identical to the Byte read operation. After
the first Data byte is transmitted, the master now responds with
an acknowledge, indicating it requires additional data. The
device continues to output data for each acknowledge received.
The master terminates the read operation by not responding with
an acknowledge but issuing a STOP condition (refer to Figure 14).
For more information about the I2C standard, please consult the
Phillips™ I2C specification documents.
FN8370 Rev 2.00
August 19, 2016
Page 8 of 14
ISL29034
S
T
A
R
T
S
T
A
R
T
S
T
O
P
DEVICE ADDRESS
WRITE
DEVICE ADDRESS
READ
SIGNAL FROM
MASTER DEVICE
ADDRESS BYTE
DATA BYTE
1 0 0 0 1 0 0 0
1 0 0 0 1 0 0 1
SIGNAL AT SDA
A
C
K
A
C
K
A
C
K
SIGNALS FROM
SLAVE DEVICE
FIGURE 13. BYTE ADDRESS READ SEQUENCE
S
S
T
A
R
T
S
T
O
P
T
A
R
T
DEVICE
ADDRESS
WRITE
DEVICE
ADDRESS READ
SIGNAL FROM
MASTER DEVICE
ADDRESS BYTE
DATA BYTE 1
DATA BYTE 2
DATA BYTE n
1 0 0 0 1 0 0 0
1 0 0 0 1 0 0 1
SIGNAL AT SDA
A
C
K
A
C
K
A
C
K
A
C
K
A
C
K
SIGNALS FROM
SLAVE DEVICE
(n IS ANY INTEGER
GREATER THAN 1)
FIGURE 14. BURST READ SEQUENCE
TABLE 2. REGISTER MAP
REGISTER
ADDRESS
REGISTER BITS
NAME
DEC
HEX
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT ACCESS
COMMAND-I
COMMAND-II
DATALSB
DATAMSB
ID
0
1
0x00
0x01
0x02
0x03
0x0F
OP2
OP1
OP0
RESERVED
RES0
D2
0x00
0x00
RW
RW
RO
RESERVED
RES1
D3
RANGE1 RANGE0
2
D7
D6
D14
D5
D13
1
D4
D12
0
D1
D9
D0
D8
0x00
3
D15
BOUT
D11
1
D10
0x00
RO
15
RESERVED
RESERVED
1x101xxx
RW
Register Description
TABLE 3. DECIMAL TO HEXADECIMAL
Following are detailed descriptions of the control registers related to
the operation of the ISL29034 ambient light sensor device. These
registers are accessed by the I2C serial interface. For details on the
I2C interface, refer to “Serial Interface” on page 7.
DIVISION
175/16
QUOTIENT
10 = A
REMINDER
15 = F
HEX NUMBER
0xAF
Command-I Register (Address: 0x00)
All the features of the device are controlled by the registers. The ADC
data can also be read. The following sections explain the details of
each register bit. All RESERVED bits are Intersil used bits ONLY. The
value of the reserved bit can change without notice.
TABLE 4. COMMAND-I REGISTER ADDRESS
REGISTER BITS
ADDR
(HEX) B7 B6 B5 B4 B3 B2 B1
DFLT
B0 (HEX)
NAME
COMMAND-I 0x00 OP2 OP1 OP0
RESERVED
0x00
Decimal to Hexadecimal Conversion
To convert decimal value to hexadecimal value, divide the decimal
number by 16, and write the remainder on the side as the least
significant digit. This process is continued by dividing the quotient by
16 and writing the remainder until the quotient is 0. When
performing the division, the remainders, which will represent the
hexadecimal equivalent of the decimal number, are written
beginning with the least significant digit (right) and each new digit is
written to the next most significant digit (the left) of the previous
digit. Consider the number 175 decimal.
The Command-I register consists three operation mode bits. The
default register value is 0x00 at power-on.
Command-I Register (Address: 0x0 Operation Mode Bits[7:5])
The ISL29034 has different operating modes. These modes are
selected by setting B7 to B5 bits on register address 0x00. The
device powers up on a disable mode. Table 5 on page 10 lists the
possible operating modes.
FN8370 Rev 2.00
August 19, 2016
Page 9 of 14
ISL29034
.
TABLE 5. OPERATING MODES BITS
OPERATION
TABLE 8. ADC RESOLUTION DATA WIDTH
B7
0
B6
0
B5
0
B3
0
B2
0
NUMBER OF CLOCK CYCLES
216 = 65,536
212 = 4,096
n-BIT ADC
Power-down the device (Default)
16
12
8
0
0
1
The device measures ALS only once every integration
cycle. This is the lowest operating mode. (Note 11)
0
1
1
0
28 = 256
0
1
1
0
0
1
1
0
1
0
1
0
1
IR once
1
1
24 = 16
4
0
Reserved (Do Not Use)
Reserved (Do Not Use)
Measures ALS continuously
Measures IR continuous
Reserved (Do Not Use)
Integration Time
1
1
1
TABLE 9. INTEGRATION TIME OF n-BIT ADC
n # ADC BITS
INTEGRATION TIME (ms)
1
4
8
0.022
0.352
5.6
NOTE:
11. Intersil does not recommend using this mode
12
16
105
Command-II Register (Address: 0x01)
TABLE 6. COMMAND-II REGISTER BITS
Data Registers (Addresses: 0x02 and 0x03)
REG.
REGISTER BITS
TABLE 10. ADC REGISTER BITS
ADDR
DFLT
NAME
(HEX) B7 B6 B5 B4 B3 B2
B1
B0
(HEX)
Reg.
Addr
REGISTER BITS
DFLT
COMMAND 0x01
-II
RESERVED
RES RES RANGE RANGE 0x00
NAME (HEX) B7 B6 B5 B4 B3 B2 B1 B0 (HEX)
DATALSB 0x02 D7 D6 D5 D4 D3 D2 D1 D0 0x00
DATAMSB 0x03 D15 D14 D13 D12 D11 D10 D9 D8 0x00
1
0
1
0
The Command-II register consists of ADC control bits. In this
register, there are two range bits and two ADC resolution bits.
The default register value is 0x00 at power-on.
The ISL29034 has two 8-bit read-only registers to hold the upper
and lower byte of the ADC value. The Upper byte is accessed at
Address 0x03 and the Lower byte is accessed at Address 0x02.
For 16-bit resolution, the data is from D0 to D15; for 12-bit
resolution, the data is from D0 to D11; for 8-bit resolution, the
data is from D0 to D7 and for 4-bit resolution, the data is from
D0 to D3. The registers are refreshed after every conversion
cycle. The default register value is 0x00 at power-on.
FULL SCALE LUX RANGE [B1:B0]
The full scale Lux range has four different selectable ranges. The
range determines the full scale Lux range (1k, 4k, 16k, and 64k).
Each range has a maximum allowable Lux value. Table 7 lists the
possible values of FSR.
TABLE 7. RANGE REGISTER BITS
RANGE
SELECTION
FULL SCALE LUX RANGE
(LUX)
TABLE 11. ADC DATA REGISTERS
B1
0
B0
0
ADDRESS
0
1
2
3
1,000
4,000
(HEX)
0x02
CONTENTS
0
1
D0 is LSB for 4-, 8-, 12- or 16-bit resolution; D3 is MSB for
4-bit resolution; D7 is MSB for 8-bit resolution
1
0
16,000
64,000
0x03
D15 is MSB for 16-bit resolution; D11 is MSB for 12-bit
resolution
1
1
Integration Time ADC Resolution [B3:B2]
ID Register (Address: 0x0F)
B2 and B3 determine the ADC’s resolution and the number of
clock cycles per conversion. Changing the number of clock cycles
does more than just change the resolution of the device; it also
changes the integration time, which is the period the device’s
Analog-to-Digital (A/D) converter samples the photodiode current
signal for a measurement. Table 8 lists the possible ADC
resolution. Only 16 bit ADC resolution can reject better
50Hz/60Hz noise flickering light source.
TABLE 12. ID REGISTER BITS
REGISTER BITS
ADDR
NAME (HEX) B7
B6
B5 B4 B3 B2 B1 B0
DFLT
ID 0x0F BOUT RESERVED
1
0
1
RESERVED 1x101xxx
The ID register has three different types of information.
FN8370 Rev 2.00
August 19, 2016
Page 10 of 14
ISL29034
The constant can also be viewed as the sensitivity (the smallest
Lux measurement the device can measure).
RESERVED BITS [B2:B0] AND [B6]
All RESERVED bits on the ISL29034 are Intersil used bits only.
Bit0 to Bit2 and Bit6 are RESERVED bits where their value might
change without any notification to the user. It is advised when
using the identification bits to identify the device in a syste, the
software should mask the Bit0 to Bit2 and Bit6 to Bit7 to properly
identify the device.
Range
Count
max
(EQ. 2)
----------------------------
=
Where, Range is defined in Table 7 on page 10. Countmax is the
maximum output counts from the ADC.
The transfer function used for n-bits ADC becomes:
DEVICE ID BITS [B5:B3]
(EQ. 3)
Range
------------------
E
=
DATA
The ISL29034 provides 3 bits to identify the device in a system.
These bits are located on register address 0x0F, Bit3 to Bit5. The
identification bit value for the ISL29034 is xx101xxx. The device
identification bits are read only bits. It is important to notice that
Bit7 is a status bit for Brownout Condition (BOUT).
cal
n
2
Where n = 4, 8, 12 or 16. This is the number of ADC bits
programmed in the command register. 2n represents the
maximum number of counts possible from the ADC output. Data is
the ADC output stored in the data registers (02 hex and 03 hex).
BROWNOUT STATUS BIT TO BOUT [B7]
Bit7 on register address 0x0F is a status bit for Brownout
Condition (BOUT). The default value of this bit is “BOUT = 1”
during the initial power-up, which indicates the device may
possibly have gone through a brownout condition. Therefore, the
status bit should be reset to “BOUT = 0” by an I2C write command
during the initial configuration of the device.
Enhancing EV Accuracy
The device has on-chip passive optical filter designed to block
(reject) most of the incident Infra Red. However, EV
measurement may be vary under differing IR-content light
sources. In order to optimize the measurement variation
between differing IR-content light sources, ISL29034 provides IR
channel, which is programmed at COMMAND-1 (Reg0x0) to
measure the IR level of differing IR-content light sources.
The default register value is 0xA8 at power-on.
Applications Information
Figure 15 is a normalized spectral response of various types of
The ISL29034’s ADC output codes, DATA, are directly
proportional to the IR intensity received in the IR sensing.
light sources for reference.
DATA = E
(EQ. 4)
IR
IR
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
FLUORESCENT
Then EV accuracy can be found in Equation 5:
EV
= KxDATA
+ DATA
EV IR
(EQ. 5)
Accuracy
Here, DATAEV is the received ambient light intensity ADC output
codes. K is a resolution of visible portion. Its unit is Lux/count.
The typical value of K is 0.82. DATAIR is the received IR intensity.
The constant changes with the spectrum of background IR,
such as A, F2 and D65 (Notes 8, 9 and 10). The also changes
with the ADC’s range and resolution selections. A typical for
Range1 and Range2 is -11292.86 and Range3 and Range4 is
2137.14 without IR tinted glass.
HALOGEN
INCAND.
SUN
350
550
750
950
WAVELENGTH (nm)
Noise Rejection
FIGURE 15. NORMALIZED SPECTRAL RESPONSE OF LIGHT SOURCES
Electrical AC power worldwide is distributed at either 50Hz or
60Hz. Artificial light sources vary in intensity at the AC power
frequencies. The undesired interference frequencies are infused
on the electrical signals. This variation is one of the main sources
of noise for the light sensors. Integrating type ADC’s have
excellent noise-rejection characteristics for periodic noise
sources whose frequency is an integer multiple of the conversion
rate. By setting the sensor’s integration time to an integer
multiple of periodic noise signal, the performance of an ambient
light sensor can be improved greatly in the presence of noise. In
order to reject the AC noise, the integration time of the sensor
must to adjusted to match the AC noise cycle. For instance, a
60Hz AC unwanted signal’s sum from 0ms to k*16.66ms
(k = 1,2...ki) is zero. Similarly, setting the device’s integration
time to be an integer multiple of the periodic noise signal, greatly
improves the light sensor output signal in the presence of noise.
Calculating Lux
The ISL29034’s ADC output codes, DATA, are directly
proportional to Lux in the ambient light sensing.
(EQ. 1)
E
= DATA
cal
Where Ecal is the calculated Lux reading. The constant is
determined by the full-scale range and the ADC’s maximum
output counts. The constant is independent of the light sources
(fluorescent, incandescent and sunlight) because the light
sources IR component is removed during the light signal process.
FN8370 Rev 2.00
August 19, 2016
Page 11 of 14
ISL29034
Suggested PCB Footprint
Temperature Coefficient
It is important that users check TB477 “Surface Mount Assembly
Guidelines for Optical Dual Flat Pack No Lead (ODFN) Package”
before starting ODFN product board mounting.
The limits stated for Temperature Coefficient (TC) are governed
by the method of measurement. The “Box” method is usually
used for specifying the temperature coefficient. The
overwhelming standard for specifying the temperature drift of a
reference is to evaluate the maximum voltage change over the
specified temperature range. This yields ppm/°C, and is
calculated using Equation 4:
Board Mounting Considerations
For applications requiring the light measurement, the board
mounting location should be reviewed. The device uses an
Optical Dual Flat Pack No Lead (ODFN) package, which subjects
the die to mild stresses when the printed circuit (PC) board is
heated and cooled, which slightly changes the shape. Because of
these die stresses, placing the device in areas subject to slight
twisting can cause degradation of reference voltage accuracy. It
is normally best to place the device near the edge of a board, or
on the shortest side, because the axis of bending is most limited
in that location.
V
– V
LOW
(EQ. 6)
6
HIGH
----------------------------------------------------------------------------------
TC =
10
V
T
– T
LOW
NOMINAL
HIGH
Where:
HIGH is the maximum reference voltage over the temperature
V
range.
V
LOW is the minimum reference voltage over the temperature
Layout Considerations
range.
The ISL29034 is relatively insensitive to layout. Like other I2C
devices, it is intended to provide excellent performance even in
significantly noisy environments. There are only a few
considerations that will ensure best performance.
VNOMINAL is the nominal reference voltage at +25°C.
THIGH - TLOW is the specified temperature range (°C).
Digital Inputs and Termination
The ISL29034 digital inputs are guaranteed to CMOS levels. The
internal register is updated on the rising edge of the clock.
To minimize reflections, proper termination should be
Route the supply and I2C traces as far as possible from all
sources of noise. Use two power-supply decoupling capacitors,
1µF and 0.1µF, placed close to the device.
implemented. If the lines driving the clock and the digital inputs
are 50Ω lines, then 50Ω termination resistors should be placed
as close to the sensor inputs as possible, connected to the digital
ground plane (if separate grounds are used).
Soldering Considerations
Convection heating is recommended for reflow soldering;
direct-infrared heating is not recommended. The plastic ODFN
package does not require a custom reflow soldering profile and is
qualified to +260°C. A standard reflow soldering profile with a
+260°C maximum is recommended.
Typical Circuit
A typical application for the ISL29034 is shown in Figure 16. The
ISL29034’s I2C address is internally hard-wired as 1000100. The
device can be tied onto a system’s I2C bus together with other I2C
compliant devices.
100
VDD
VDD_PULLUP
4.7k
1µF
1
4.7k
VDD
SDA
SCL
SDA
4
3
ISL29034
MCU
SCL
GND
2
FIGURE 16. ISL29034 TYPICAL CIRCUIT
FIGURE 17. 4 LD ODFN SENSOR LOCATION OUTLINE
FN8370 Rev 2.00
August 19, 2016
Page 12 of 14
ISL29034
Revision History The revision history provided is for informational purposes only and is believed to be accurate, however, not
warranted. Please go to web to make sure you have the latest revision.
DATE
REVISION
FN8370.2
CHANGE
August 19, 2016
- Figure 2 on page 1: Updated y-axis titles.
- On page 4: Added typical value of VOL (0.06)
- On page 6: Corrected Figure 5 graph and label, corrected graph of Figure 6, corrected Figure 8 label (removed
under F2 light source).
- Added table of “key differences” on page 1.
- Updated the L4.1.5x1.3 Package Outline Drawing to the latest revision:
Tiebar Note updated
From: Tiebar shown (if present) is a non-functional feature.
To: Tiebar shown (if present) is a non-functional feature and may be located on any of the 4 sides (or ends).
April 9, 2014
FN8370.1
Initial Release
About Intersil
Intersil Corporation is a leading provider of innovative power management and precision analog solutions. The company's products
address some of the largest markets within the industrial and infrastructure, mobile computing and high-end consumer markets.
For the most updated datasheet, application notes, related documentation and related parts, please see the respective product
information page found at www.intersil.com.
You may report errors or suggestions for improving this datasheet by visiting www.intersil.com/ask.
Reliability reports are also available from our website at www.intersil.com/support.
© Copyright Intersil Americas LLC 2013-2016. All Rights Reserved.
All trademarks and registered trademarks are the property of their respective owners.
For additional products, see www.intersil.com/en/products.html
Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted
in the quality certifications found at www.intersil.com/en/support/qualandreliability.html
Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such
modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets are
current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its
subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
FN8370 Rev 2.00
August 19, 2016
Page 13 of 14
ISL29034
Package Outline Drawing
L4.1.5x1.3
4 LD 1.5X1.3 OPTICAL DUAL FLAT NO-LEAD (ODFN)
Rev 6, 4/15
(0.55)
6
1.50
A
PIN #1
INDEX AREA
B
6
PIN 1
INDEX AREA
1
2
4
3
1.30
0.50
0.25 ±0.07
4
0.10
(4X)
0.10 M C A B
3X 0 . 40 ± 0 . 10
TOP VIEW
BOTTOM VIEW
SEE DETAIL "X"
(0.55)
C
0.10
(3x0.60)
0.70 ±0.05
C
(0.75)
BASE PLANE
SEATING PLANE
0.08 C
4
3
1
2
(0.50)
SIDE VIEW
(4 x 0.25)
(1.30)
5
0 . 2 REF
C
TYPICAL RECOMMENDED LAND PATTERN
0 . 00 MIN.
0 . 05 MAX.
DETAIL "X"
NOTES:
1. Dimensions are in millimeters.
Dimensions in ( ) for Reference Only.
2. Dimensioning and tolerancing conform to AMSE Y14.5m-1994.
3.
Unless otherwise specified, tolerance : Decimal ± 0.05
4. Dimension applies to the metallized terminal and is measured
between 0.18mm and 0.32mm from the terminal tip.
5.
6.
Tiebar shown (if present) is a non-functional feature and may
be located on any of the 4 sides (or ends).
The configuration of the pin #1 identifier is optional, but must be
located within the zone indicated. The pin #1 identifier may be
either a mold or mark feature.
7. This package not defined by JEDEC, but MO-229 can be used as
a general reference.
FN8370 Rev 2.00
August 19, 2016
Page 14 of 14
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