參數(shù)資料
型號(hào)： TSL2563CS
廠商： TAOS Inc.
英文描述： LOW-VOLTAGE LIGHT-TO-DIGITAL CONVERTER
中文描述： 低壓光到數(shù)字轉(zhuǎn)換器
文件頁(yè)數(shù)： 5/38頁(yè)
文件大?。?/td> 443K
代理商： TSL2563CS
TSL2562, TSL2563
LOW-VOLTAGE
LIGHT-TO-DIGITAL CONVERTER
TAOS066J
MAY 2007
5
The
LUMENOLOGY
Company
Copyright 2007, TAOS Inc.
www.taosinc.com
NOTES:
2. Optical measurements are made using small-angle incident radiation from light-emitting diode optical sources. Visible 640 nm LEDs
and infrared 940 nm LEDs are used for final product testing for compatibility with high-volume production.
3. The 640 nm irradiance E
e
is supplied by an Al
I
nGaP light-emitting diode with the following characteristics: peak wavelength
λ
p = 640 nm and spectral halfwidth
Δλ
= 17 nm.
4. The 940 nm irradiance E
e
is supplied by a GaAs light-emitting diode with the following characteristics: peak wavelength
λ
p = 940 nm and spectral halfwidth
Δλ
= 40 nm.
5. Integration time T
int
, is dependent on internal oscillator frequency (f
osc
) and on the integration field value in the timing register as
described in the
Register Set
section. For nominal f
osc
= 735 kHz, nominal T
int
= (number of clock cycles)/f
osc
.
Field value 00: T
int
= (11
×
918)/f
osc
= 13.7 ms
Field value 01: T
int
= (81
×
918)/f
osc
= 101 ms
Field value 10: T
int
= (322
×
918)/f
osc
= 402 ms
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).
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
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
×
918)/2
2) = 5047
Field value 01: Full scale ADC count value = ((81
×
918)/2
2) = 37177
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
int
= 178 ms for nominal f
osc
= 735 kHz.
7. Low gain mode has 16 lower gain than high gain mode: (1/16 = 0.0625).
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
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.
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