TSL27711FN TAOS, TSL27711FN Datasheet - Page 16

• 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
State Diagram
16
Copyright E 2010, TAOS Inc.
Figure 15 shows a more detailed flow for the state machine. The device starts in the sleep mode. The PON bit
is written to enable the device. A 2.7-ms delay will occur before entering the start state. If the PEN bit is set, the
state machine will step through the proximity states of proximity accumulate and then proximity ADC
conversion. As soon as the conversion is complete, the state machine will move to the following state.
If the WEN bit is set, the state machine will then cycle through the wait state. If the WLONG bit is set, the wait
cycles are extended by 12
step to the ALS state.
The AEN should always be set, even in proximity-only operation. In this case, a minimum of 1 integration time
step should be programmed. The ALS state machine will continue until it reaches the terminal count at which
point the data will be latched in the ALS register and the interrupt set, if enabled.
Up to 255 LED Pulses
Pulse Frequency: 62.5 kHz
Time: 16.3 ms − 4.2 ms
Maximum 4.2ms
Up to 255 steps
Step: 2.72 ms
Time: 2.72 mS − 696 ms
Recommended − 2.72 ms 1024 Counts
Accum
Prox
Prox
ADC
WLONG = 0
Counts up to 256 steps
Step: 2.72 ms
Time: 2.72 ms − 696 ms
Minimum − 2.72 ms
PEN = 1
×
over normal operation. When the wait counter terminates, the state machine will
Figure 15. Expanded State Diagram
Check
Prox
r
WEN = 1
PON = 1
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Check
Sleep
Wait
Wait
Start
PON = 0
WLONG = 1
Counts up to 256 steps
Step: 32.64 ms
Time: 32.64 ms − 8.35 s
Minimum − 32.64 ms
Check
ALS
r
AEN = 1
The LUMENOLOGY r Company
100 Hz Minimum − 10 ms
120 Hz Minimum − 8 ms
Time: 2.72 ms − 696 ms
Time: 2.72 ms
Delay
Up to 255 steps
ALS
ALS
Step: 2.72 ms