TSL2581, TSL2583
LIGHT-TO-DIGITAL CONVERTER
TAOS134 − MARCH 2011
4
r
r
Copyright E 2011, TAOS Inc.
The LUMENOLOGY r Company
www.taosinc.com
Electrical Characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Active
175 250 μA
I
DD
Supply current
Power down — I
2
C activity
3 10 μA
INT SDA output low voltage
3 mA sink current 0
0.4 V
V
OL
INT, SDA output low voltage
6 mA sink current 0
0.6 V
I
LEAK
Leakage current −5 5 μA
Operating Characteristics, V
DD
= 3 V, T
A
= 25C, (unless otherwise noted) (Notes 1, 2, 3, and 4)
PARAMETER TEST CONDITIONS CHANNEL MIN TYP MAX UNIT
f
osc
Oscillator frequency 705 750 795 kHz
E
= 0, ATIME = 0xB6 (200 ms),
Ch0 0 1 5
Dark ADC count value
,
,
gain = 16×
Ch1 0 1 5
counts
Ch0 37887
Full scale ADC count value
ATIME = 0xDB (100 ms)
Ch1 37887
Full scale ADC count value
Ch0 65535
counts
ATIME = 0x6C (400 ms)
Ch1 65535
λ
= 625 nm, ATIME = 0xF6 (27 ms)
Ch0 4000 5000 6000
,
E
e
= 171.6 μW/cm
2
, gain = 16×
Ch1 700
ADC count value
λ
= 850 nm, ATIME = 0xF6 (27 ms)
Ch0 4000 5000 6000
counts
,
E
e
= 220 μW/cm
2
, gain = 16×
Ch1 2750
ADC count value ratio: Ch1/Ch0
λ
= 625 nm 10.8 15.8 20.8
ADC count value ratio: Ch1/Ch0
%
λ
= 850 nm 41 55 68
λ 625 nm ATIME 0xF6 (27 ms)
Ch0 29.1
λ
p
= 625 nm, ATIME = 0xF6 (27 ms)
Ch1 4
counts/
R
e
Irradiance responsivity
λ 850 nm ATIME 0xF6 (27 ms)
Ch0 22.8
(μW/
m
2
λ
p
= 850 nm, ATIME = 0xF6 (27 ms)
Ch1 12.5
Ch0 7 8 9
8×
Ch1 7 8 9
Gain scaling (relative to 1×)
Ch0 15 16 17
Gain scaling (relative to 1×) 16×
Ch1 15 16 17
×
Ch0 97 107 115
111×
Ch1 100 115 125
NOTES: 1. Optical measurements are made using small-angle incident radiation from light-emitting diode optical sources. Visible 640 nm LEDs
and infrared 850 nm LEDs are used for final product testing for compatibility with high-volume production.
2. The 625 nm irradiance E
e
is supplied by an AlInGaP light-emitting diode with the following characteristics: peak wavelength
λp = 625 nm and spectral halfwidth Δλ½ = 20 nm.
3. The 850 nm irradiance E
e
is supplied by a light-emitting diode with the following characteristics: peak wavelength
λp = 850 nm and spectral halfwidth Δλ½ = 42 nm.
4. The integration time T
int
, is dependent on internal oscillator frequency (f
osc
) and on the number of integration cycles (ATIME) in the
Timing Register (0xFF) as described in the Register section. For nominal f
osc
= 750 kHz, nominal T
int
= 2.7 ms × ATIME.
