Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

ISL29030AIROZ-EVALZ Datasheet(PDF) 10 Page - Intersil Corporation

Part # ISL29030AIROZ-EVALZ
Description  Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes - Analog and Digital Out
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL29030AIROZ-EVALZ Datasheet(HTML) 10 Page - Intersil Corporation

Back Button ISL29030AIROZ-EVALZ Datasheet HTML 6Page - Intersil Corporation ISL29030AIROZ-EVALZ Datasheet HTML 7Page - Intersil Corporation ISL29030AIROZ-EVALZ Datasheet HTML 8Page - Intersil Corporation ISL29030AIROZ-EVALZ Datasheet HTML 9Page - Intersil Corporation ISL29030AIROZ-EVALZ Datasheet HTML 10Page - Intersil Corporation ISL29030AIROZ-EVALZ Datasheet HTML 11Page - Intersil Corporation ISL29030AIROZ-EVALZ Datasheet HTML 12Page - Intersil Corporation ISL29030AIROZ-EVALZ Datasheet HTML 13Page - Intersil Corporation ISL29030AIROZ-EVALZ Datasheet HTML 14Page - Intersil Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 16 page
background image
ISL29030A
10
FN7722.2
November 12, 2012
When the IR from the LED reaches an object and gets reflected
back into the ISL29030A, the reflected IR light is converted into
current, as shown by the IR spectral response 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.
Average LED driving current consumption is given by Equation 1.
A typical IRDR scheme is 220mA amplitude pulses every 800ms,
which yields 28μA DC.
Total Current Consumption
Total current consumption is the sum of IDD and IIRDR. The IRDR
pin sinks current (as shown in Figure 4), and the average IRDR
current can be calculated using Equation 1. IDD depends on
voltage and the mode of operation, as shown in Figure 11.
Interrupt Function
The ISL29030A has an intelligent interrupt scheme designed to
shift some logic processing away from intensive microcontroller
I2C polling routines (which consume power) and toward a more
independent light sensor that can instruct a system to “wake up”
or “go to sleep.”
An ALS interrupt event (ALS_FLAG) is governed by Registers 5
through 7. The user writes high and low threshold values to these
registers, and the ISL29030A issues an ALS interrupt flag if the
actual counts stored in Registers 0x9 and 0xA are outside the
user-programmed window. The user must write 0 to clear the
ALS_FLAG.
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 greater than the high threshold a user-specified consecutive
number of times (X; set by the user; see next paragraph). The
proximity interrupt flag is cleared when the proximity data is
lower than the low proximity threshold X consecutive times, or
when the user writes “0” to PROX_FLAG.
Interrupt persistency is another useful option available for both
ALS and proximity measurements. Persistency requires a user-
specified number (X) of consecutive 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.
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 simultaneous ALS and Prox interrupts to happen before
changing the state of the interrupt pin, the user sets this bit high.
If the user wants the interrupt pin to change state when either
the ALS or the Proximity interrupt flag goes high, the user leaves
this bit at its default value of 0.
Analog-Out IALS Pin
When ALS_EN = 1, the analog IALS output pin sources a current
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 (VI_ALS) on IALS.
ALS Range 1 Considerations
When measuring ALS counts higher than 1800 on range 1
(ALSIR_MODE = 0, ALS_RANGE = 0, ALS_DATA > 1800), the user
must switch to range 2 (change the ALS_RANGE bit from 0 to 1)
and re-measure 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, contact the
factory.
VDD Power-up and Power Supply
Considerations
At power-up, ensure a VDD slew rate of 0.5V/ms or greater. After
power-up, or if the power supply temporarily deviates from the
factory specification (2.25V to 3.63V), Intersil recommends the
user write the following: 0x00 to register 0x01, 0x29 to register
0x0F, 0x00 to register 0x0E, and 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 method
instead of writing to test registers, then set VDD =0V for 1 second
or more, power up again at the required slew rate, and write the
desired values to the registers.
Power-Down
The user can set power-down in two ways. 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).
Calculating Lux
When in ALS mode, the ISL29030A ADC output codes are directly
proportional to lux (see ALSIR_MODE bit).
In Equation 2, Ecalc is the calculated lux reading, and OUT
represents the ADC code. The constant,
α, which is to plug in, is
determined by the range bit, ALS_RANGE (register 0x1 bit 1) and
is independent of the light source type.
FIGURE 4. CURRENT DRIVE MODE OPTIONS
PIN 8 - IRDR
220mA
(PROX_DR = 1)
(IRDR IS HI-Z WHEN
NOT DRIVING)
110mA
(PROX_DR = 0)
IlRDR AVG
()
IlRDR PEAK
() 100μs
×
TSLEEP 540μs
+
--------------------------------------------------------
=
(EQ. 1)
Ecalc
α
RANGE
OUTADC
×
=
(EQ. 2)


Similar Part No. - ISL29030AIROZ-EVALZ

ManufacturerPart #DatasheetDescription
logo
Intersil Corporation
ISL29030AIROZ-EVALZ INTERSIL-ISL29030AIROZ-EVALZ Datasheet
724Kb / 16P
   Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes
ISL29030AIROZ-EVALZ INTERSIL-ISL29030AIROZ-EVALZ Datasheet
601Kb / 16P
   Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt
logo
Renesas Technology Corp
ISL29030AIROZ-EVALZ RENESAS-ISL29030AIROZ-EVALZ Datasheet
824Kb / 16P
   Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes - Analog and Digital Out
More results

Similar Description - ISL29030AIROZ-EVALZ

ManufacturerPart #DatasheetDescription
logo
Renesas Technology Corp
ISL29030 RENESAS-ISL29030 Datasheet
853Kb / 17P
   Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes - Analog and Digital Out
ISL29030A RENESAS-ISL29030A Datasheet
824Kb / 16P
   Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes - Analog and Digital Out
logo
Intersil Corporation
ISL29030IROZ-T7 INTERSIL-ISL29030IROZ-T7 Datasheet
538Kb / 17P
   Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes - Analog and Digita Out
November 12, 2012
ISL29028IROZ INTERSIL-ISL29028IROZ Datasheet
624Kb / 16P
   Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes
November 4, 2011
logo
Renesas Technology Corp
ISL29028 RENESAS-ISL29028 Datasheet
820Kb / 16P
   Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes
logo
Intersil Corporation
ISL29030A INTERSIL-ISL29030A_11 Datasheet
724Kb / 16P
   Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes
ISL29028AIROZ-T7 INTERSIL-ISL29028AIROZ-T7 Datasheet
600Kb / 16P
   Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes
January 29, 2014
ISL29029IROZ-T7 INTERSIL-ISL29029IROZ-T7 Datasheet
576Kb / 16P
   Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes
November 23, 2010
logo
Renesas Technology Corp
ISL29028A RENESAS-ISL29028A Datasheet
825Kb / 16P
   Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes
ISL29029 RENESAS-ISL29029 Datasheet
825Kb / 16P
   Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com