TSL2561CL TAOS, TSL2561CL Datasheet - Page 5

• Manufacturer Part Number: TSL2561CL
• Description: Light to Digital Converters Ambient Light Sensor Light to Digital
• Manufacturer: TAOS

Specifications of TSL2561CL

• Data Bus Width: 20 bit
• Peak Wavelength: 640 nm, 940 nm
• Maximum Operating Frequency: 780 KHz
• Operating Supply Voltage: 2.7 V to 3.6 V
• Operating Current: 0.6 mA to 15 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: Chip LED
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NOTES: 2. Optical measurements are made using small-angle incident radiation from light-emitting diode optical sources. Visible 640 nm LEDs
The LUMENOLOGY r Company
3. The 640 nm irradiance E
4. The 940 nm irradiance E
5. Integration time T
6. Full scale ADC count value is limited by the fact that there is a maximum of one count per two oscillator frequency periods and also
7. Low gain mode has 16
8. The sensor Lux is calculated using the empirical formula shown on p. 22 of this data sheet based on measured Ch0 and Ch1 ADC
and infrared 940 nm LEDs are used for final product testing for compatibility with high-volume production.
λp = 640 nm and spectral halfwidth Δλ½ = 17 nm.
λp = 940 nm and spectral halfwidth Δλ½ = 40 nm.
described in the Register Set section. For nominal f
Field value 00: T
Field value 01: T
Field value 10: T
Scaling between integration times vary proportionally as follows: 11/322 = 0.034 (field value 00), 81/322 = 0.252 (field value 01),
and 322/322 = 1 (field value 10).
by a 2-count offset.
Full scale ADC count value = ((number of clock cycles)/2 − 2)
Field value 00: Full scale ADC count value = ((11
Field value 01: Full scale ADC count value = ((81
Field value 10: Full scale ADC count value = 65535, which is limited by 16 bit register. This full scale ADC count value is reached
for 131074 clock cycles, which occurs for T
count values for the light source specified. Actual Lux is obtained with a commercial luxmeter. The range of the (sensor Lux) / (actual
Lux) ratio is estimated based on the variation of the 640 nm and 940 nm optical parameters. Devices are not 100% tested with
fluorescent or incandescent light sources.
int
int
int
int
= (11
= (81
= (322
, is dependent on internal oscillator frequency (f
y
×
×
lower gain than high gain mode: (1/16 = 0.0625).
e
e
×
918)/f
918)/f
is supplied by an AlInGaP light-emitting diode with the following characteristics: peak wavelength
is supplied by a GaAs light-emitting diode with the following characteristics: peak wavelength
918)/f
osc
osc
osc
= 13.7 ms
= 101 ms
r
= 402 ms
int
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= 178 ms for nominal f
×
×
918)/2 − 2) = 5047
osc
918)/2 − 2) = 37177
= 735 kHz, nominal T
osc
osc
) and on the integration field value in the timing register as
= 735 kHz.
int
LIGHT-TO-DIGITAL CONVERTER
= (number of clock cycles)/f
r
TSL2560, TSL2561
Copyright E 2009, TAOS Inc.
TAOS059N − MARCH 2009
osc
.
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