ISL29015IROZ-T7 Intersil, ISL29015IROZ-T7 Datasheet - Page 5

• Manufacturer Part Number: ISL29015IROZ-T7
• Description: IC SENSOR LIGHT-DGTL I2C 6-ODFN
• Manufacturer: Intersil

Specifications of ISL29015IROZ-T7

• Output Type: Digital - SPI, I²C
• Sensor Type: Light and Proximity
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

programmable continuous proximity sensing. These six modes
can be programmed in series to fulfill the application needs.
The detailed program configuration is listed in “Register Set” on
page 6.
When the part is programmed for ambient light sensing, the
ambient light with wavelength within the “Ambient Light
Sensing” spectral response curve in Figure 6 is converted
into current. With ADC, the current is converted to an
unsigned n-bit (up to 16 bits) digital output.
When the part is programmed for infrared (IR) sensing, the
IR light with wavelength within the “IR or Proximity Sensing”
spectral response curve on Figure 6 is converted into
current. With ADC, the current is converted to an unsigned
n-bit (up to 16 bits) digital output.
When the part is programmed for proximity sensing, the
external IR LED is turned on by the built-in IR LED driver
through the IRDR pin. The amplitude of the IR LED current
and the IR LED modulation frequency can be programmed
through Command Register II. When the IR from the LED
reaches an object and gets reflected back, the reflected IR
light with wavelength within the “IR or Proximity Sensing”
spectral response curve in Figure 6 is converted into current.
With ADC, the current is converted to an unsigned n-bit (up
to 16 bits) digital output. The output reading is inversely
proportional to the square of the distance between the
sensor and the object. When there is significant background
IR noise like direct sunlight, both IR and proximity sensing
can be implemented for background noise cancellation. The
differential output reading from the ADC decreases with
distance.
IN
I
I
I
OUT
I
2
2
2
2
C DATA
C SDA
C SDA
C CLK
START
SDA DRIVEN BY MASTER
A6 A5 A4 A3 A2 A1 A0 W A R7 R6 R5 R4 R3 R2 R1 R0 A
1
DEVICE ADDRESS
2
3
4
5
5
6
7
W A
8
A
9
FIGURE 1. I
1
REGISTER ADDRESS
SDA DRIVEN BY MASTER
2
3
4
2
C READ TIMING DIAGRAM SAMPLE
5
6
ISL29015
7
8
9
A
STOP START
I
There are four 8-bit registers available inside the ISL29015.
The two command registers define the operation of the device.
The command registers do not change until the registers are
overwritten. The two 8-bit data Read Only registers are for the
ADC output. The data registers contain the ADC's latest digital
output, or the number of clock cycles in the previous integration
period.
The ISL29015’s I
hardwired as 1000100. When 1000100x with x as R or W is
sent after the Start condition, this device compares the first
seven bits of this byte to its address and matches.
Figure 1 shows a sample one-byte read. Figure 2 shows a
sample one-byte write. The I
the SCL (clock) line, while either the master or the slave can
drive the SDA (data) line. Figure 2 shows a sample write.
Every I
start condition (SDA falling while SCL remains high). The
following byte is driven by the master, and includes the slave
address and read/write bit. The receiving device is
responsible for pulling SDA low during the
acknowledgement period. Every I
the master asserting a stop condition (SDA rising while SCL
remains high).
For more information about the I
the Philips™ I
2
C Interface
SDA DRIVEN BY MASTER
2
A6 A5 A4 A3 A2 A1 A0 W A
1
C transaction begins with the master asserting a
2
DEVICE ADDRESS
3
2
C specification documents.
4
2
C interface slave address is internally
5
6
7
8
2
C bus master always drives
A
A D7 D6 D5 D4 D3 D2 D1 D0
9
2
1
C standard, please consult
2
C transaction ends with
2
SDA DRIVEN BY ISL29015
3
DATA BYTE0
4
5
6
October 31, 2008
7
8
FN6522.0
9