ISL29011IROZ-T7 Intersil, ISL29011IROZ-T7 Datasheet - Page 9

• Manufacturer Part Number: ISL29011IROZ-T7
• Description: IC PROXIMITY SENSOR AMB LT 8ODFN
• Manufacturer: Intersil

Specifications of ISL29011IROZ-T7

• Output Type: Digital - I²C
• Sensor Type: Light and Proximity
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ISL29011IROZ-T7TR

Command Register II 01(hex)
The second command register has the following functions:
3. Interrupt persist; Bits 1 and 0. The interrupt pin and the
2. Modulation Frequency: Bits 6. This bit sets the IR LED
3. Amplitude of IR driver current: Bits 5 and 4. This device
1. Proximity Sensing Scheme: Bit 7. This bit programs the
BITS 1 TO 0
Once triggered, INT pin stays low and the status bit stays
high. Both interrupt pin and the status bit are automatically
cleared at the end of Command Register I transfer.
interrupt flag is triggered/set when the data sensor
reading is out of the interrupt threshold window after m
consecutive number of integration cycles. The interrupt
persist bits determine m.
function of the proximity detection. Logic 0 of this bit,
Scheme 0, makes full n (4, 8, 12, 16) bits (unsigned)
proximity detection. The range of Scheme 0 proximity count
is from 0 to 2
7, 11, 15) bits (2’s complementary) proximity_less_ambient
detection. The range of Scheme 1 proximity count is from -
2
Scheme 1 proximity detection is less affected by the
ambient IR noise variation.
driver’s modulation frequency.
provides current source to drive an external IR LED. The
drive capability can be programmed through Bits 5 and 4.
For example, the device sources 12.5mA out of the IRDR
pin if Bits 5 and 4 are 0.
(n-1)
BITS 6
BIT 2
BIT 7
00
01
10
11
0
1
0
1
0
1
to 2
TABLE 5. PROXIMITY SENSING SCHEME
TABLE 6. MODULATION FREQUENCY
(n-1)
TABLE 4. INTERRUPT PERSIST
n
TABLE 3. INTERRUPT FLAG
Interrupt is cleared or not triggered yet
Interrupt is triggered
. Logic 1 of this bit, Scheme 1, makes n-1 (3,
Sensing IR from LED and ambient
Sensing IR from LED with ambient IR rejection
. While Scheme 0 has wider dynamic range,
NUMBER OF INTEGRATION CYCLES
MODULATION FREQUENCY
9
OPERATION
OPERATION
(kHz)
360
DC
16
1
4
8
ISL29011
.
Data Registers (02 hex and 03 hex)
The device has two 8-bit read-only registers to hold the data
from LSB to MSB for ADC. The most significant bit (MSB) is
accessed at 03 hex, and the least significant bit (LSB) is
accessed at 02 hex. 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. The registers
are refreshed after every conversion cycle.
Interrupt Registers (04, 05, 06 and 07 hex)
Registers 04 and 05 hex set the low (LO) threshold for the
interrupt pin and the interrupt flag. 04 hex is the LSB and 05
hex is the MSB. By default, the Interrupt threshold LO is 00
hex for both LSB and MSB.
BITS 5 TO 4
4. Resolution: Bits 3 and 2. Bits 3 and 2 determine the ADC’s
5. Range: Bits 1 and 0. The Full Scale Range (FSR) can be
ADDRESS
BITS
BITS 3 TO 2
1:0
00
01
10
TABLE 7. CURRENT SOURCE CAPABILITY AT IRDR PIN
11
resolution and the number of clock cycles per conversion
in Internal Timing Mode. 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.
adjusted via I
possible values of FSR for the 499kΩ R
(hex)
02
03
00
01
10
11
00
01
10
11
k
1
2
3
4
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
D15 is MSB for 16-bit resolution, D11 is MSB for
12-bit resolution
12.5mA IR LED driver
25mA IR LED driver
50mA IR LED driver
100mA IR LED driver
RANGE(k)
TABLE 8. RESOLUTION/WIDTH
2
2
2
2
Range1
Range2
Range3
Range4
NUMBER OF CLOCK CYCLES
TABLE 10. DATA REGISTERS
16
12
8
4
TABLE 9. RANGE/FSR LUX
2
C using Bits 1 and 0. Table 9 lists the
= 256
= 16
= 65,536
= 4,096
IRDR PIN SOURCE CURRENT
ALS SENSING
FSR (LUX) @
CONTENTS
16,000
64,000
1,000
4,000
EXT
Refer to page 4
Refer to page 4
Refer to page 4
Refer to page 4
FSR @ IR
SENSING
n-BIT ADC
resistor.
February 4, 2010
16
12
8
4
FN6467.3