TSL27711FN TAOS, TSL27711FN Datasheet - Page 14

• Manufacturer Part Number: TSL27711FN
• Description: Light to Digital Converters Light to Digital w/Proximity
• Manufacturer: TAOS

Specifications of TSL27711FN

• Data Bus Width: 16 bit
• Peak Wavelength: 640 nm, 850 nm
• Maximum Operating Frequency: 795 KHz
• Operating Supply Voltage: 2.4 V to 3.6 V
• Operating Current: 175 uA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: - 30 C
• Interface Type: I2C
• Maximum Fall Time: 300 ns
• Maximum Rise Time: 300 ns
• Mounting Style: SMD/SMT
• Resolution: 16 bit
• Package / Case: DFN-6
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TSL2771
LIGHT-TO-DIGITAL CONVERTER
with PROXIMITY SENSING
TAOS100A − FEBRUARY 2010
14
Copyright E 2010, TAOS Inc.
The proximity integration time (PTIME) is the period of time that the internal ADC converts the analog signal
to a digital count. It is recommend that this be set to a minimum of PTIME = 0xFF or 2.72 ms.
The combination of LED power and number of pulses can be used to control the distance at which the sensor
can detect proximity. Figure 13 shows an example of the distances covered with settings such that each curve
covers 2
×
1000
800
600
400
200
the distance. Counts up to 64 pulses provide a 16
0
1
y
2
y
4
y
8
y
Figure 12. Proximity IR LED Waveform
100 mA,
4 Pulses
25 mA,
1 Pulse
Background
100 mA,
1 Pulse
LED On
r
Add IR +
100 mA,
16 Pulses
PROXIMITY ADC COUNT
RELATIVE DISTANCE
www.taosinc.com
Relative Distance
16 ms
16
Figure 13
y
Subtract
Background
LED Off
vs.
100 mA,
64 Pulses
IR LED Pulses
×
range.
r
The LUMENOLOGY r Company