ISL29030IROZ-T7 [INTERSIL]
Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes - Analog and Digita Out;
| 型号： | ISL29030IROZ-T7 |
| 厂家： | 
Intersil |
| 描述： | Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes - Analog and Digita Out |
| 文件： | 总17页 (文件大小：538K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Low Power Ambient Light and Proximity Sensor with
Intelligent Interrupt and Sleep Modes - Analog and Digital
Out
ISL29030
Features
The ISL29030 is an integrated ambient and infrared
• Works Under All Light Sources Including Sunlight
• Dual ADCs Measure ALS/Prox Concurrently
• Intelligent Interrupt Scheme Simplifies μC Code
2
light-to-digital converter with a built-in IR LED driver and I C
Interface (SMBus Compatible). This device uses two
independent ADCs for concurrently measuring ambient light
and proximity in parallel. The flexible interrupt scheme is
designed for minimal microcontroller utilization.
Ambient Light Sensing
• Simple Output Code Directly Proportional to lux
• 50Hz/60Hz Flicker Noise and IR Rejection
• Light Sensor Close to Human Eye Response
• Selectable 125/2000 Lux Range
For ambient light sensor (ALS) data conversions, an ADC
converts photodiode current (with a light sensitivity range of
2000 Lux) in 100ms per sample. The ADC rejects 50Hz/60Hz
flicker noise caused by artificial light sources. The I
provides an analog output current proportional to the
pin
ALS
• Analog 420μA Output Pin I
Proportional to Lux
ALS
Proximity Sensing
• Proximity Sensor with Broad IR Spectrum
measured light (420μA FSR).
For proximity sensor (Prox) data conversions, the built-in driver
turns on an external infrared LED and the proximity sensor
ADC converts the reflected IR intensity to digital. This ADC
rejects ambient IR noise (such as sunlight) and has a 540μs
conversion time.
- Can Use 850nm and 950nm External IR LEDs
2
• IR LED Driver with I C Programmable Sink Currents
- Net 100μs Pulse with 110mA or 220mA Amplitudes
- Periodic Sleep Time up to 800ms Between Pulses
• Ambient IR Noise Cancellation (Including Sunlight)
Intelligent and Flexible Interrupts
The ISL29030 provides low power operation of ALS and proximity
sensing with a typical 138μA normal operation current (110μA for
sensors and internal circuitry, ~28μA for external LED) with
220mA current pulses for a net 100μs, repeating every 800ms
(or under).
• Independent ALS/Prox Interrupt Thresholds
• Adjustable Interrupt Persistency
- 1/4/8/16 Consecutive Triggers Required Before Interrupt
Ultra Low Power
• 138μA DC Typical Supply Current for ALS/Prox Sensing
- 110μA for Sensors and Internal Circuitry
The ISL29030 uses both a hardware pin and software bits to
indicate an interrupt event has occurred. An ALS interrupt is
defined as a measurement which is outside a set window. A
proximity interrupt is defined as a measurement over a
threshold limit. The user may also require that both ALS/prox
interrupts occur at once, up to 16 times in a row before
activating the interrupt pin.
- 28μA Typical Current for External IR LED (Assuming
220mA for 100μs Every 800ms)
• <1.0μA Supply Current When Powered Down
Easy to Use
The ISL29030 is designed to operate from 2.25V to 3.63V over
the -40°C to +85°C ambient temperature range. It is packaged in
a clear, lead-free 8 lead ODFN package.
• Set Registers; Wait for Interrupt
2
• I C (SMBus Compatible) Output
• Temperature Compensated
• Tiny ODFN8 2.0x2.1x0.7 (mm) Package
Additional Features
Pin Configuration
ISL29030
8 LD ODFN (2.0x2.1x0.7mm)
TOP VIEW
2
• 1.7V to 3.63V Supply for I C Interface
• 2.25V to 3.63V Sensor Power Supply
• Pb-Free (RoHS compliant)
I
1
2
3
4
8
7
6
5
IRDR
INT
ALS
Applications
• Display and Keypad Dimming Adjustment and Proximity
Sensing for:
VDD
GND
THERMAL
PAD
SDA
SCL
REXT
- Mobile Devices: Smart Phone, PDA, GPS
- Computing Devices: Laptop PC, Netbook
*THERMAL PAD CAN BE CONNECTED TO GND OR
ELECTRICALLY ISOLATED
- Consumer Devices: LCD-TV, Digital Picture Frame, Digital
Camera
• Industrial and Medical Light and Proximity Sensing
November 12, 2012
FN6872.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Copyright © Intersil Americas Inc. 2010, 2012. All Rights Reserved.
1
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
2
I C Bus is a registered trademark owned by NXP Semiconductors Netherlands, B.V.
All other trademarks mentioned are the property of their respective owners.
ISL29030
Pin Descriptions
PIN NUMBER
PIN NAME
DESCRIPTION
-
T.PAD
Thermal Pad (connect to GND or float)
1
2
3
4
5
6
7
8
I
Analog Current Output (Proportional to ALS/IR Data Count: 420µA FSR)
Positive supply: 2.25V to 3.63V
ALS
VDD
GND
REXT
SCL
Ground
External resistor (499kΩ; 1%) connects this pin to ground
2
2
I C clock line
The I C bus lines can be pulled from 1.7V to above V , 3.63V max
DD
2
SDA
INT
I C data line
Interrupt pin; Logic output (open-drain) for interrupt
IRDR
IR LED driver pin - current flows into ISL29030 from LED cathode
Block Diagram
VDD
2
ALS PHOTODIODE
ARRAY
COMMAND
REGISTER
LIGHT DATA
PROCESS
ALS AND IR
DUAL CHANNEL
ADCs
DATA
REGISTER
1
DAC
I
ALS
5
6
SCL
SDA
2
I C
IR PHOTODIODE
ARRAY
IREF
INTERRUPT
IR DRIVER
INT
7
8
FOSC
IRDR
3
4
REXT
GND
Ordering Information
PACKAGE
PART NUMBER
(Notes 1, 2, 3)
TEMP. RANGE
(°C)
TAPE AND REEL
(Pb-free)
PKG.
DWG. #
ISL29030IROZ-T7
ISL29030IROZ-EVALZ
NOTES:
-40 to +85
8 Ld ODFN
L8.2.1x2.0
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 ISL29030. For more information on MSL please see techbrief TB477.
FN6872.1
November 12, 2012
2
ISL29030
Absolute Maximum Ratings (T = +25°C)
Thermal Information
A
V
Supply Voltage between V and GND . . . . . . . . . . . . . . . . . . . . . .4.0V
Thermal Resistance (Typical, Note 4)
θ
(°C/W)
88
DD
DD
JA
2
I C Bus Pin Voltage (SCL, SDA). . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 4.0V
8 Ld ODFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
I C Bus Pin Current (SCL, SDA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <10mA
Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+90°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
Pb-Free Reflow Profile (*) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB477
*Peak temperature during solder reflow +235°C max
R
Pin Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.5V to VDD + 0.5V
EXT
IRDR Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.5V
Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.5V to VDD + 0.5V
I
ALS
INT Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 4.0V
INT Pin Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <10mA
ESD Rating
Human Body Model (Note 5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2kV
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.
NOTES:
4. θ is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
JA
Brief TB379.
5. ESD on all pins is 2kV except for IRDR, which is 1.5kV.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise
noted, all tests are at the specified temperature and are pulsed tests, therefore: T = T = T
J
C
A
Electrical Specifications
V
= 3.0V, T = +25°C, R = 499kΩ 1% tolerance.
EXT
DD
A
MIN
MAX
PARAMETER
DESCRIPTION
Power Supply Range
CONDITION
(Note 10) TYP (Note 10) UNIT
V
2.25
0.5
3.0
3.63
V
V/ms
µA
DD
SR_V
Input Power-up Slew Rate
V
Rising Edge between 0.4V and 2.25V
DD
DD
I
Supply Current when Powered Down
Supply Current for ALS+Prox in Sleep Time
Supply Current for Prox in Sleep Time
Supply Current for ALS
ALS_EN = 0; PROX_EN = 0
ALS_EN = 1; PROX_EN = 1
ALS_EN = 0; PROX_EN = 1
ALS_EN = 1; PROX_EN = 0
0.1
116
85
0.8
DD_OFF
I
135
µA
DD_NORM
I
µA
DD_PRX_SLP
I
102
5.25
100
0.54
3
µA
DD_ALS
f
Internal Oscillator Frequency
MHz
ms
ms
nA
OSC
INTGR_ALS
t
12-bit ALS Integration/Conversion Time
8-bit Prox Integration/Conversion Time
88
112
t
INTGR_PROX
I
I
I
Output Current when ALS = Disabled
Output Current When Dark
ALS_EN = 0; V = 0V
I_ALS
100
0.6
ALS_OFF
ALS
I
ALS_EN = 1; ALS_RANGE = 1; E = 0 Lux
0.1
µA
ALS_0
ALS_1
ALS
I
Current Output under Specified Conditions
E = 53 lux, Fluorescent (Note 6),
ALS_RANGE = 0
161
µA
I
Current Output under Specified Conditions
E = 320 lux, Fluorescent (Note 6)
ALS_RANGE = 1
40
60
80
µA
ALS_2
I
I
Output Current At Full Scale
ALS_EN = 1; ALS Code = 4095
380
0
420
460
µA
V
ALS_F
ALS
V
Compliance Voltage on I
Output Current
w/ 5% Variation in ALS_EN = 1; ALS Code = 4095
ALS
VDD-0.8
I_ALS
DATA
DATA
ALS Result when Dark
E
E
= 0 lux, 2k Range
1
3
Counts
ALS_0
AMBIENT
Full Scale ALS ADC Code
> Selected Range Maximum Lux (Note 9)
4095 Counts
%
ALS_F
AMBIENT
ΔDATA
DATA
Count Output Variation Over Three Light
Sources: Fluorescent, Incandescent and
Sunlight
Ambient Light Sensing
±10
DATA
ALS_1
Light Count Output with LSB of
0.0326 lux/count
E = 53 lux, Fluorescent (Notes 6, 9),
ALS_RANGE = 0
1638
Counts
FN6872.1
November 12, 2012
3
ISL29030
Electrical Specifications
V
= 3.0V, T = +25°C, R
= 499kΩ 1% tolerance. (Continued)
EXT
DD
A
MIN
MAX
PARAMETER
DESCRIPTION
CONDITION
(Note 10) TYP (Note 10) UNIT
DATA
Light Count Output With LSB of 0.522 lux/count E = 320 lux, Fluorescent (Note 6)
ALS_RANGE = 1
460
614
1
768
Counts
ALS_2
DATA
DATA
DATA
Prox Measurement w/o Object in Path
Full Scale Prox ADC Code
2
Counts
Counts
Counts
ns
PROX_0
PROX_F
PROX_1
255
57
Prox Measurement Result
Rise Time for IRDR Sink Current
Fall time for IRDR Sink Current
IRDR Sink Current
(Note 7)
35
98
46
500
500
110
220
0.001
t
R
R
= 15Ω at IRDR pin, 20% to 80%
= 15Ω at IRDR pin, 80% to 20%
r
f
LOAD
LOAD
t
ns
I
I
PROX_DR = 0; V
PROX_DR = 1; V
= 0.5V
= 0.5V
120
mA
mA
µA
IRDR_0
IRDR_1
IRDR
IRDR
IRDR Sink Current
I
IRDR Leakage Current
PROX_EN = 0; V = 3.63V (Note 8)
DD
-1
1
IRDR_LEAK
V
Acceptable Voltage Range on IRDR Pin
Register bit PROX_DR = 0
0.5
4.3
V
IRDR
t
Net I
IRDR
On Time Per PROX Reading
100
µs
PULSE
V
Voltage of R
2
Pin
EXT
0.51
V
REF
2
F
V
I C Clock Rate Range
400
3.63
0.55
kHz
V
I C
2
2
Supply Voltage Range for I C Interface
SCL and SDA Input Low Voltage
SCL and SDA Input High Voltage
SDA Current Sinking Capability
INT Current Sinking Capability
1.7
I C
V
V
IL
IH
V
1.25
3
V
I
V
V
= 0.4V
= 0.4V
5
5
4
mA
mA
mA/V
SDA
OL
I
3
INT
OL
PSRR
(ΔI
)/(ΔV
)
PROX_DR = 0; V
= 0.5V to 4.3V
IRDR
IRDR
IRDR
IRDR
NOTES:
6. An LED is used in production test. The LED irradiance is calibrated to produce the same DATA count against a fluorescent light source of the same lux
level.
7. An 850nm infrared LED is used to test PROX/IR sensitivity in an internal test mode.
8. Ability to guarantee I
IRDR
leakage of ~1nA is limited by test hardware.
9. For ALS applications under light-distorting glass, please see the section titled “ALS Range 1 Considerations” on page 11.
10. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
2
I C Electrical Specifications For SCL and SDA unless otherwise noted, V = 3V, T = +25°C, R
= 499kΩ 1% tolerance
DD
A
EXT
(Note 11).
PARAMETER
2
DESCRIPTION
Supply Voltage Range for I2C Interface
SCL Clock Frequency
CONDITION
MIN
TYP MAX UNIT
V
1.7
3.63
400
0.55
V
kHz
V
I C
f
SCL
V
SCL and SDA Input Low Voltage
SCL and SDA Input High Voltage
Hysteresis of Schmitt Trigger Input
IL
V
1.25
V
IH
V
0.05V
V
hys
DD
V
Low-level Output Voltage (Open-drain) at 4mA Sink
Current
0.4
V
OL
I
Input Leakage for each SDA, SCL Pin
-10
10
50
µA
ns
i
t
t
Pulse Width of Spikes that must be Suppressed by
the Input Filter
SP
SCL Falling Edge to SDA Output Data Valid
900
ns
AA
FN6872.1
November 12, 2012
4
ISL29030
2
I C Electrical Specifications For SCL and SDA unless otherwise noted, V = 3V, T = +25°C, R = 499kΩ 1% tolerance
EXT
DD
A
(Note 11). (Continued)
PARAMETER
DESCRIPTION
CONDITION
MIN
TYP MAX UNIT
C
Capacitance for each SDA and SCL Pin
Hold Time (Repeated) START Condition
10
pF
ns
i
t
After this period, the first clock pulse is
generated
600
HD:STA
t
LOW Period of the SCL Clock
HIGH period of the SCL Clock
Set-up Time for a Repeated START Condition
Data Hold Time
Measured at the 30% of VDD crossing
1300
600
ns
ns
ns
ns
ns
ns
ns
ns
ns
LOW
t
HIGH
t
600
SU:STA
HD:DAT
t
30
t
Data Set-up Time
100
SU:DAT
t
Rise Time of both SDA and SCL Signals
Fall Time of both SDA and SCL Signals
Set-up Time for STOP Condition
(Note 12)
(Note 12)
20 + 0.1xC
20 + 0.1xC
600
R
b
b
t
F
t
SU:STO
t
Bus Free Time Between a STOP and START
Condition
1300
BUF
C
Capacitive Load for Each Bus Line
SDA and SCL system bus pull-up resistor
Data Valid Time
400
pF
kΩ
µs
µs
V
b
R
Maximum is determined by t and t
F
1
pull-up
VD;DAT
VD:ACK
R
t
0.9
0.9
t
Data Valid Acknowledge Time
Noise Margin at the LOW Level
Noise Margin at the HIGH Level
V
0.1VDD
0.2VDD
nL
V
V
nH
NOTES:
2
11. I C limits are based on design/simulation and are not production tested.
12. C is the capacitance of the bus in pF.
b
FN6872.1
November 12, 2012
5
ISL29030
2
FIGURE 1. I C TIMING DIAGRAM
Register Map
2
There are ten 8-bit registers accessible via I C. Registers 0x1 and 0x2 define the operation mode of the device. Registers 0x3 through 0x7
store the various ALS/IR/Prox thresholds which trigger interrupt events. Registers 0x8 through 0xA store the results of ALS/IR/Prox ADC
conversions.
TABLE 1. ISL29030 REGISTERS AND REGISTER BITS
BIT
ADDR REG NAME
7
6
5
4
3
2
1
0
DEFAULT
(n/a)
0x00
0x00
0x00
0xFF
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0A
0x0E
0x0F
(n/a)
(Reserved)
CONFIGURE
INTERRUPT
PROX_LT
PROX EN
PROX_SLP[2:0]
PROX_DR
ALS_FLAG
ALS_EN
ALS_RANGE
ALSIR_MODE
INT_CTRL
PROX_FLAG
PROX_PRST[1:0]
(Write 0)
ALS_PRST[1:0]
PROX_LT[7:0]
PROX_HT
ALSIR_TH1
ALSIR_TH2
ALSIR_TH3
PROX_DATA
ALSIR_DT1
ALSIR_DT2
TEST1
PROX_HT[7:0]
ALSIR_LT[7:0]
0x00
0xF0
0xFF
ALSIR_HT[3:0]
ALSIR_LT[11:8]
ALSIR_HT[11:4]
PROX_DATA[7:0]
ALSIR_DATA[7:0]
0x00
0x00
0x00
0x00
0x00
(Unused)
ALSIR_DATA[11:8]
(Write as 0x00)
(Write as 0x00)
TEST2
FN6872.1
November 12, 2012
6
ISL29030
Register Descriptions
TABLE 2. REGISTER 0x00 (RESERVED)
NAME
BIT #
7:0
ACCESS
RO
DEFAULT
(n/a)
FUNCTION/OPERATION
(n/a)
Reserved - no need to read or write
TABLE 3. REGISTER 0x01 (CONFIGURE) - PROX/ALS CONFIGURATION
NAME FUNCTION/OPERATION
When = 0, proximity sensing is disabled
BIT #
ACCESS
RW
DEFAULT
0x00
PROX_EN
7
When = 1, continuous proximity sensing is enabled. Prox data will be ready 0.54ms after this bit is
set high
(Prox Enable)
For bits 6:4 = (see the following)
111; sleep time between prox IR LED pulses is 0.0ms (run continuously)
110; sleep time between prox IR LED pulses is 12.5ms
101; sleep time between prox IR LED pulses is 50ms
100; sleep time between prox IR LED pulses is 75ms
011; sleep time between prox IR LED pulses is 100ms
010; sleep time between prox IR LED pulses is 200ms
001; sleep time between prox IR LED pulses is 400ms
000; sleep time between prox IR LED pulses is 800ms
PROX_SLP
(Prox Sleep)
6:4
RW
0x00
PROX_DR
(Prox Drive)
When = 0, IRDR behaves as a pulsed 110mA current sink
When = 1, IRDR behaves as a pulsed 220mA current sink
3
2
1
0
RW
RW
RW
RW
0x00
0x00
0x00
0x00
ALS_EN
When = 0, ALS/IR sensing is disabled
(ALS Enable) When = 1, continuous ALS/IR sensing is enabled with new data ready every 100ms
ALS_RANGE When = 0, ALS is in low-lux range
(ALS Range) When = 1, ALS is in high-lux range
ALSIR_MODE When = 0, ALS/IR data register contains visible ALS sensing data
(ALSIR Mode) When = 1, ALS/IR data register contains IR spectrum sensing data
TABLE 4. REGISTER 0x02 (INTERRUPT) - PROX/ALS INTERRUPT CONTROL
BIT #
7
ACCESS
FLAG
DEFAULT
0x00
BIT NAME
FUNCTION/OPERATION
PROX_FLAG
(Prox Flag)
When = 0, no Prox interrupt event has occurred since power-on or last “clear”
When = 1, a Prox interrupt event occurred. Clearable by writing “0”
For bits 6:5 = (see the following)
00; set PROX_FLAG if 1 conversion result trips the threshold value
01; set PROX_FLAG if 4 conversion results trip the threshold value
10; set PROX_FLAG if 8 conversion results trip the threshold value
11; set PROX_FLAG if 16 conversion results trip the threshold value
PROX_PRST
(Prox Persist)
6:5
RW
0x00
Unused
(Write 0)
Unused register bit - write 0
4
3
RW
0x00
0x00
ALS_FLAG
(ALS FLAG)
When = 0, no ALS interrupt event has occurred since power-on or last “clear”
When = 1, an ALS interrupt event occurred. Clearable by writing “0”
FLAG
For bits 2:1 = (see the following)
00; set ALS_FLAG if 1 conversion is outside the set window
01; set ALS_FLAG if 4 conversions are outside the set window
10; set ALS_FLAG if 8 conversions are outside the set window
11; set ALS_FLAG if 16 conversions are outside the set window
ALS_PRST
(ALS Persist)
2:1
0
RW
RW
0x00
0x00
INT_CTRL
When = 0, set INT pin low if PROX_FLAG or ALS_FLAG high (logical OR)
(Interrupt Control) When = 1, set INT pin low if PROX_FLAG and ALS_FLAG high (logical AND)
TABLE 5. REGISTER 0x03 (PROX_LT) - INTERRUPT LOW THRESHOLD FOR PROXIMITY SENSOR
BIT #
7:0
ACCESS
RW
DEFAULT
0x00
BIT NAME
FUNCTION/OPERATION
PROX_LT
(Prox Threshold)
8-bit interrupt low threshold for proximity sensing
FN6872.1
November 12, 2012
7
ISL29030
TABLE 6. REGISTER 0x04 (PROX_HT) - INTERRUPT HIGH THRESHOLD FOR PROXIMITY SENSOR
BIT #
7:0
ACCESS
RW
DEFAULT
0xFF
BIT NAME
FUNCTION/OPERATION
PROX_HT
(Prox Threshold)
8-bit interrupt high threshold for proximity sensing
TABLE 7. REGISTER 0x05 (ALSIR_TH1) - INTERRUPT LOW THRESHOLD FOR ALS/IR
BIT #
7:0
ACCESS
RW
DEFAULT
0x00
BIT NAME
FUNCTION/OPERATION
ALSIR_LT[7:0]
(ALS/IR Low Thr.)
Lower 8 bits (of 12 bits) for ALS/IR low interrupt threshold
TABLE 8. REGISTER 0x06 (ALSIR_TH2) - INTERRUPT LOW/HIGH THRESHOLDS FOR ALS/IR
BIT #
7:4
ACCESS
RW
DEFAULT
0x0F
BIT NAME
FUNCTION/OPERATION
ALSIR_HT[3:0]
(ALS/IR High Thr.)
Lower 4 bits (of 12 bits) for ALS/IR high interrupt threshold
ALSIR_LT[11:8]
(ALS/IR Low Thr.)
3:0
RW
0x00
Upper 4 bits (of 12 bits) for ALS/IR low interrupt threshold
TABLE 9. REGISTER 0x07 (ALSIR_TH3) - INTERRUPT HIGH THRESHOLD FOR ALS/IR
BIT #
7:0
ACCESS
RW
DEFAULT
0xFF
BIT NAME
FUNCTION/OPERATION
ALSIR_HT[11:4]
(ALS/IR High Thr.)
Upper 8 bits (of 12 bits) for ALS/IR high interrupt threshold
TABLE 10. REGISTER 0x08 (PROX_DATA) - PROXIMITY SENSOR DATA
BIT #
7:0
ACCESS
RO
DEFAULT
0x00
BIT NAME
FUNCTION/OPERATION
Results of 8-bit proximity sensor ADC conversion
PROX_DATA
(Proximity Data)
TABLE 11. REGISTER 0x09 (ALSIR_DT1) - ALS/IR SENSOR DATA (LOWER 8 BITS)
BIT #
7:0
ACCESS
RO
DEFAULT
0x00
BIT NAME
FUNCTION/OPERATION
ALSIR_DATA
(ALS/IR Data)
Lower 8 bits (of 12 bits) from result of ALS/IR sensor conversion
TABLE 12. REGISTER 0x0A (ALSIR_DT2) - ALS/IR SENSOR DATA (UPPER 4 BITS)
BIT #
7:4
ACCESS
RO
DEFAULT
0x00
BIT NAME
FUNCTION/OPERATION
(Unused)
Unused bits.
Upper 4 bits (of 12 bits) from result of ALS/IR sensor conversion
ALSIR_DATA
(ALS/IR Data)
3:0
RO
0x00
TABLE 13. REGISTER 0x0E (TEST1) - TEST MODE
BIT #
7:0
ACCESS
RW
DEFAULT
BIT NAME
FUNCTION/OPERATION
Test mode register. When 0x00, in normal operation.
0x00
(Write as 0x00)
TABLE 14. REGISTER 0x0F (TEST2) - TEST MODE 2
BIT #
7:0
ACCESS
RW
DEFAULT
0x00
BIT NAME
FUNCTION/OPERATION
Test mode register. When 0x00, in normal operation.
(Write as 0x00)
FN6872.1
November 12, 2012
8
ISL29030
START
DEVICE ADDRESS
A
A
A
9
REGISTER ADDRESS
DEVICE ADDRESS
A
A
DATA BYTE0
W
STOP START
2
I C DATA
2
I C SDA
A6 A5 A4 A3 A2 A1 A0 W
SDA DRIVEN BY MASTER
R7 R6 R5 R4 R3 R2 R1 R0
SDA DRIVEN BY MASTER
A
A
9
A6 A5 A4 A3 A2 A1 A0
W
SDA DRIVEN BY ISL29030
MASTER
2
I C SDA
SDA DRIVEN BY MASTER
A D7 D6 D5 D4 D3 D2 D1 D0
SLAVE (ISL29030)
2
I C CLK
9
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
2
FIGURE 2. I C DRIVER TIMING DIAGRAM FOR MASTER AND SLAVE CONNECTED TO COMMON BUS
Photodiodes and ADCs
The ISL29030 contains two photodiode arrays which convert
Principles of Operation
2
I C Interface
photons (light) into current. The ALS photodiodes are constructed to
mimic the human eye’s wavelength response curve to visible light
(see Figure 7). The ALS photodiodes’ current output is digitized by a
12-bit ADC in 100ms. These 12 bits can be accessed by reading
2
The ISL29030’s I C interface slave address is internally hardwired
as 0b1000100.
2
Figure 2 shows a sample one-byte read. The I C bus master
2
from I C registers 0x9 and 0xA when the ADC conversion is
always drives the SCL (clock) line, while either the master or the
2
completed.
slave can drive the SDA (data) line. Every I C transaction begins
with the master asserting a start condition (SDA falling while SCL
remains high). The first transmitted byte is initiated by the
master and includes 7 address bits and a R/W bit. The slave is
responsible for pulling SDA low during the ACK bit after every
transmitted byte.
The ALS converter is a charge-balancing integrating 12-bit ADC.
Charge-balancing is best for converting small current signals in the
presence of periodic AC noise. Integrating over 100ms highly rejects
both 50Hz and 60Hz light flicker by picking the lowest integer
number of cycles for both 50Hz/60Hz frequencies.
2
Each I C transaction ends with the master asserting a stop
condition (SDA rising while SCL remains high).
2
For more information about the I C standard, please consult the
™ 2
Philips I C specification documents.
FN6872.1
November 12, 2012
9
ISL29030
ALS CONVERSION
TIME = 100ms
(FIXED)
SEVERAL µs BETWEEN
CONVERSIONS
ALS
ACTIVE
100ms
100ms
100ms
100ms
100ms
TIME
TIME
0.54ms FOR
PROX
CONVERSION
PROX
SENSOR
ACTIVE
SERIES OF
CURRENT PULSES
TOTALING 0.1ms
IRDR
(CURRENT
DRIVER)
TIME
SLEEP TIME
(PROX_SLP)
FIGURE 3. TIMING DIAGRAM FOR PROX/ALS EVENTS - NOT TO SCALE
The proximity sensor is an 8-bit ADC which operates in a similar
will see a fixed 220mA current pulse as seen in Figure 4.
fashion. When proximity sensing is enabled, the IRDR pin will
drive a user-supplied infrared LED, the emitted IR reflects off an
object (i.e., a human head) back into the ISL29030, and a sensor
converts the reflected IR wave to a current signal in 0.54ms. The
ADC subtracts the IR reading before and after the LED is driven
(to remove ambient IR such as sunlight), and converts this value
to a digital count stored in Register 0x8.
220mA
(PROX_DR = 1)
110mA
(PROX_DR = 0)
PIN 8 - IRDR
The ISL29030 is designed to run two conversions concurrently: a
proximity conversion and an ALS (or IR) conversion. Please note that
because of the conversion times, the user must let the ADCs perform
(IRDR IS HI-Z WHEN
NOT DRIVING)
FIGURE 4. CURRENT DRIVE MODE OPTIONS
2
one full conversion first before reading from I C Registers
PROX_DATA (wait 0.54ms) or ALSIR_DT1/2 (wait 100ms). The timing
between ALS and Prox conversions is arbitrary (as shown in Figure 3).
The ALS runs continuously with new data available every 100ms. The
proximity sensor runs continuously with a time between conversions
decided by PROX_SLP (Register 1 Bits [6:4]).
When the IR from the LED reaches an object and gets reflected
back into the ISL29030, the reflected IR light is converted into
current as per the IR spectral response shown in Figure 7. One
entire proximity measurement takes 0.54ms for one conversion
(which includes 0.1ms spent driving the LED), and the period
between proximity measurements is decided by PROX_SLP
(sleep time) in Register 1 Bits 6:4.
Ambient Light and IR Sensing
The ISL29030 is set for ambient light sensing when Register bit
ALSIR_MODE = 0 and ALR_EN = 1. The light-wavelength response of
the ALS appears as shown in Figure 6. ALS measuring mode (as
opposed to IR measuring mode) is set by default.
Average LED driving current consumption is given by Equation 1.
I
× 100μs
lRDR;PEAK
(EQ. 1)
-----------------------------------------------------
I
=
lRDR;AVE
T
SLEEP
When the part is programmed for infrared (IR) sensing
A typical IRDR scheme is 220mA amplitude pulses every 800ms,
which yields 28μA DC.
(ALSIR_MODE = 1; ALS_EN = 1), infrared light is converted into a
current and digitized by the same ALS ADC. The result of an IR
conversion is strongly related to the amount of IR energy incident
on our sensor, but is unitless and is referred to in digital counts.
Total Current Consumption
Total current consumption is the sum of I and I
pin sinks current (as shown in Figure 4) and the average IRDR
. The IRDR
DD IRDR
Proximity Sensing
current can be calculated using Equation 1. I depends on
When proximity sensing is enabled (PROX_EN = 1), the external
IR LED is driven for 0.1ms by the built-in IR LED driver through
the IRDR pin. The amplitude of the IR LED current depends on
Register 1 bit 3: PROX_DR. If this bit is low, the load will see a
fixed 110mA current pulse. If this bit is high, the load on IRDR
DD
voltage and the mode-of-operation as seen in Figure 11.
Interrupt Function
The ISL29030 has an intelligent interrupt scheme designed to
shift some logic processing away from intensive microcontroller
2
I C polling routines (which consume power) and towards a more
FN6872.1
November 12, 2012
10
ISL29030
independent light sensor which can instruct a system to “wake
up” or “go to sleep.”
Power-Down
The power-down can be set 2 ways by the user. The first is to set both
PROX_EN and ALS_EN bits to 0 in Register 1. The second and more
simple way is to set all bits in Register 1 to 0 (0x00).
An ALS interrupt event (ALS_FLAG) is governed by Registers 5 through
7. The user writes a high and low threshold value to these registers
and the ISL29030 will issue an ALS interrupt flag if the actual count
stored in Registers 0x9 and 0xA are outside the user’s programmed
window. The user must write 0 to clear the ALS_FLAG.
Calculating Lux
The ISL29030’s ADC output codes are directly proportional to lux
when in ALS mode (see ALSIR_MODE bit).
A proximity interrupt event (PROX_FLAG) is governed by the high
and low thresholds in registers 3 and 4 (PROX_LT and PROX_HT).
PROX_FLAG is set when the measured proximity data is more
than the higher threshold X-times-in-a-row (X is set by user; see
following paragraph). The proximity interrupt flag is cleared when
the prox data is lower than the low proximity threshold
E
= α
× OUT
(EQ. 2)
calc
RANGE ADC
In Equation 2, E
is the calculated lux reading and OUT
calc
represents the ADC code. The constant α to plug in is determined
by the range bit ALS_RANGE (register 0x1 bit 1) and is
independent of the light source type.
X-times-in-a-row, or when the user writes “0” to PROX_FLAG.
TABLE 15. ALS SENSITIVITY AT DIFFERENT RANGES
Interrupt persistency is another useful option available for both
ALS and proximity measurements. Persistency requires X-in-a-
row interrupt flags before the INT pin is driven low. Both ALS and
Prox have their own independent interrupt persistency options.
See ALS_PRST and PROX_PRST bits in Register 2.
α
RANGE
ALS_RANGE
(Lux/Count)
0
1
0.0326
0.522
The final interrupt option is the ability to AND or OR the two
interrupt flags using Register 2 Bit 0 (INT_CTRL). If the user
wants both ALS/Prox interrupts to happen at the same time
before changing the state of the interrupt pin, set this bit high. If
the user wants the interrupt pin to change state when either the
ALS or the Proximity interrupt flag goes high, leave this bit to its
default of 0.
Table 15 shows two different scale factors: one for the low range
(ALS_RANGE = 0) and the other for the high range (ALS_RANGE
= 1).
Noise Rejection
Charge balancing ADC’s have excellent noise-rejection
characteristics for periodic noise sources whose frequency is an
integer multiple of the conversion rate. For instance, a 60Hz AC
Analog-Out I
When ALS_EN = 1, The analog I
Pin
ALS
unwanted signal’s sum from 0ms to k*16.66ms (k = 1,2...k ) is zero.
output pin sources a current
i
ALS
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. Since wall sockets
may output at 60Hz or 50Hz, our integration time is 100ms: the
lowest common integer number of cycles for both frequencies.
directly proportional to the digital count stored in register bits
ALSIRDATA[11:0]. When ALS_EN = 0, this pin is in a high
impedance state. See Figure 15 for the effects of the compliance
voltage V
on I .
I_ALS
ALS
ALS Range 1 Considerations
Proximity Detection of Various Objects
When measuring ALS counts higher than 1800 on range 1
(ALSIR_MODE = 0, ALS_RANGE = 0, ALS_DATA > 1800), switch
to range 2 (change the ALS_RANGE bit from “0” to “1”) and
remeasure ALS counts. This recommendation pertains only to
applications where the light incident upon the sensor is IR-heavy
and is distorted by tinted glass that increases the ratio of infrared
to visible light. For more information, see the separate ALS
Range 1 Considerations document.
Proximity sensing relies on the amount of IR reflected back from
objects. A perfectly black object would absorb all light and reflect
no photons. The ISL29030 is sensitive enough to detect black ESD
foam which reflects only 1% of IR. For biological objects, blonde
hair reflects more than brown hair and customers may notice that
skin tissue is much more reflective than hair. IR penetrates into
the skin and is reflected or scattered back from within. As a result,
the proximity count peaks at contact and monotonically decreases
as skin moves away. The reflective characteristics of skin are very
different from that of paper.
V
Power-up and Power Supply
DD
Considerations
Upon power-up, please ensure a V slew rate of 0.5V/ms or greater.
Typical Circuit
DD
After power-up, or if the user’s power supply temporarily deviates
from our specification (2.25V to 3.63V), Intersil recommends the
user write the following: write 0x00 to register 0x01, write 0x29 to
register 0x0F, write 0x00 to register 0x0E, and write 0x00 to register
0x0F. The user should then wait ~1ms or more and then rewrite all
registers to the desired values. If the user prefers a hardware reset
A typical application for the ISL29030 is shown in Figure 5. The
2
ISL29030’s I C address is internally hardwired as 0b1000100.
2
The device can be tied onto a system’s I C bus together with
2
other I C compliant devices.
method instead of writing to test registers: set V = 0V for 1 second
DD
or more, power back up at the required slew rate, and write registers
to the desired values.
FN6872.1
November 12, 2012
11
ISL29030
Soldering Considerations
Layout Considerations
2
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.
The ISL29030 is relatively insensitive to layout. Like other I C
devices, it is intended to provide excellent performance even in
significantly noisy environments. There are only a few
considerations that will ensure best performance.
2
Route the supply and I C traces as far as possible from all sources of
(http://www.intersil.com/data/tb/TB477.pdf)
noise. A 0.1µF and 1µF power supply decoupling capacitors need to be
placed close to the device.
Suggested PCB Footprint
It is important that users check the “Surface Mount Assembly
Guidelines for Optical Dual FlatPack No Lead (ODFN) Package”
before starting ODFN product board mounting.
(http://www.intersil.com/data/tb/TB477.pdf)
V
I2C_PULL-UP
2
I C MASTER
R2
10kΩ
R3
10kΩ
R1
10kΩ
MICROCONTROLLER
INT
SDA
V
DD
SCL
V
IR-LED
V
SLAVE_0
IRDR
2
SLAVE_1
I C SLAVE_n
8
7
1
SDA
SDA
I
ALS
3.5kΩ
2
SCL
SCL
VDD
INT
C1
1µF
C2
0.1µF
6
5
3
4
GND
SDA
SCL
REXT
REXT
499kΩ
ISL29030
FIGURE 5. ISL29030 TYPICAL CIRCUIT
FN6872.1
November 12, 2012
12
ISL29030
Typical Performance Curves
V
= 3.0V, R
= 499kΩ
EXT
DD
1.0
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
HUMAN EYE
0.9
FLUORESCENT
IR/PROX
0.8
0.7
ALS
0.6
HALOGEN
0.5
0.4
0.3
0.2
0.1
0
INCAND.
SUN
350
550
750
950
300
400
500
600
700
800
900 1000 1100
WAVELENGTH (nm)
WAVELENGTH (nm)
FIGURE 6. SPECTRUM OF FOUR LIGHT SOURCES NORMALIZED
BY LUMINOUS INTENSITY (LUX)
FIGURE 7. ISL29030 SENSITIVITY TO DIFFERENT WAVELENGTHS
2500
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
HALOGEN
2000
1500
FLUORESCENT
1000
INCANDESCENT
500
0
-90
-60
-30
0
30
60
90
0
1000
2000
3000
4000
5000
ANGULAR OFFSET (°)
ALS CODE (12-BIT)
FIGURE 8. ANGULAR SENSITIVITY
FIGURE 9. ALS LINEARITY OVER 3 LIGHT SOURCES (2000 LUX
RANGE)
300
160
ALS+PROX (DURING PROX SLEEP)
140
18% GREY CARD
220mA MODE
250
200
150
100
50
ALS-ONLY
120
110mA MODE
100
80
WHITE COPY PAPER
PROX (DURING PROX SLEEP)
60
40
0
0
20
40
60
80 100 120 140 160 180 200
DISTANCE (mm)
2.25 2.40 2.55 2.70 2.85 3.00 3.15 3.30 3.45 3.60
INPUT V
(V)
DD
FIGURE 10. PROX COUNTS vs DISTANCE WITH 10CM x 10CM
REFLECTOR (USING ISL29030 EVALUATION BOARD)
FIGURE 11. V vs I FOR VARIOUS MODES OF OPERATION (I
DD DD
ALS
PIN FLOATING)
FN6872.1
November 12, 2012
13
ISL29030
Typical Performance Curves
V
= 3.0V, R
= 499kΩ (Continued)
EXT
DD
50
40
240
220mA-MODE (PROX_DR = 1)
30
220
200
180
20
10
0
-10
-20
-30
-40
-50
160
140
120
100
110mA-MODE (PROX_DR = 0)
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
(V)
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
V
IRDR
FIGURE 12. IRDR PULSE AMPLITUDE vs V
FIGURE 13. STABILITY OF ALS COUNT OVER-TEMPERATURE
(AT 300 LUX)
IRDR
10
9
100
80
8
7
6
5
4
3
I
(%)
ALS
60
40
20
0
2
1
0
0
0.5
1.0
1.5
2.0
2.5
3.0
-40
10
60
V
(V)
TEMPERATURE (°C)
I_ALS
FIGURE 15. COMPLIANCE VOLTAGE V
'S EFFECTS ON I
ALS
= 0V)
FIGURE 14. STABILITY OF ALS COUNT
OVER-TEMPERATURE (AT 0.00 LUX)
I_ALS
(REFERENCED TO V
I_ALS
FN6872.1
November 12, 2012
14
ISL29030
2.10
1
2
8
7
2.00
0.43
3
4
6
5
0.50
0.42
FIGURE 16. 8 LD ODFN SENSOR LOCATION OUTLINE - DIMENSIONS IN mm
FN6872.1
November 12, 2012
15
ISL29030
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make
sure you have the latest Rev.
DATE
REVISION
FN6872.1
CHANGE
4/19/11
Corrected Tech Brief reference in Note 3 of “Ordering Information” on page 2 from TB363 to TB477.
Added Note 10 to MIN MAX columns of “Electrical Specifications” on page 3.
Updated “Package Outline Drawing” on page 17 as follows:
-In the “bottom view” image, added a dimension from the edge of the package to the edge of the first lead,
which is 0.15mm. Also added a dimension from the edge of the package (top edge in the picture) to the center
of the lead, which is 0.25mm
-Changed the drawing in the bottom view to show the new look of the pin#1 indicator
-Corrected note 4 from "Dimension b applies.." to "Dimension applies..."
-Added note 4 callout to bottom view
-Enclosed Note #'s 4, 5, 6 in triangles
10/18/10
6/15/10
Updates to test methodology, addition of "ALS Range 1 Considerations" paragraph, updates to "Power-Up"
Sequence, test register clarification, I_als FSR typo fixes
FN6872.0
Initial release.
About Intersil
Intersil Corporation is a leader in the design and manufacture of high-performance analog, mixed-signal and power management
semiconductors. The company's products address some of the fastest growing markets within the industrial and infrastructure,
personal computing and high-end consumer markets. For more information about Intersil or to find out how to become a member of
our winning team, visit our website and career page at www.intersil.com.
For a complete listing of Applications, Related Documentation and Related Parts, please see the respective product information page.
Also, please check the product information page to ensure that you have the most updated datasheet: ISL29030
To report errors or suggestions for this datasheet, please go to: www.intersil.com/askourstaff
Reliability reports are available from our website at: http://rel.intersil.com/reports/search.php
For additional products, see www.intersil.com/product_tree
Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted
in the quality certifications found at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time
without notice. Accordingly, the reader is cautioned to verify that data sheets 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
FN6872.1
November 12, 2012
16
ISL29030
Package Outline Drawing
L8.2.1x2.0
8 LEAD OPTICAL DUAL FLAT NO-LEAD PLASTIC PACKAGE (ODFN)
Rev 3, 1/11
A
2.10
6
0.15
B
PIN 1
INDEX AREA
0.25
6
0.50
PIN 1
INDEX AREA
1.50
1.50
2.00
0.20±0.05
4
0.10 M C A B
(2X)
0.10
8X 0 . 35 ± 0 . 05
TOP VIEW
0.75
BOTTOM VIEW
SEE DETAIL "X"
0.10 C
2.50
2.10
0.70±0.05
C
BASE PLANE
SEATING PLANE
0.08 C
SIDE VIEW
(6x0.50)
(1.50)
(8x0.20)
5
0 . 2 REF
C
(8x0.20)
0 . 00 MIN.
0 . 05 MAX.
(8x0.55)
DETAIL "X"
(0.75)
NOTES:
TYPICAL RECOMMENDED LAND PATTERN
1. Dimensions are in millimeters.
Dimensions in ( ) for Reference Only.
2. Dimensioning and tolerancing conform to ASME Y14.5m-1994.
3. Unless otherwise specified, tolerance : Decimal ± 0.05
4. Dimension applies to the metallized terminal and is measured
between 0.25mm and 0.35mm from the terminal tip.
Tiebar shown (if present) is a non-functional feature.
5.
6.
The configuration of the pin #1 identifier is optional, but must be
located within the zone indicated. The pin #1 indentifier may be
either a mold or mark feature.
FN6872.1
November 12, 2012
17
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