TSL2580, TSL2581
LIGHT-TO-DIGITAL CONVERTER
TAOS098 − MARCH 2010
Electrical Characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
Active
I
DD
V
OL
I
LEAK
Supply current
INT,
INT SDA output low voltage
Leakage current
Power down
3 mA sink current
6 mA sink current
0
0
−5
TEST CONDITIONS
MIN
TYP
175
3
MAX
250
10
0.4
0.6
5
UNIT
μA
μA
V
V
μA
Operating Characteristics, V
DD
= 3 V, T
A
= 255C, (unless otherwise noted) (Notes 1, 2, 3, and 4)
PARAMETER
f
osc
Oscillator frequency
Dark ADC count value
E
e
= 0, ITIME = 0xB6 (200 ms),
gain = 16
×
ITIME = 0xDB (100 ms)
Full scale ADC count value
ITIME = 0x6C (400 ms)
λ
p
= 625 nm, ITIME = 0xF6 (27 ms)
E
e
= 171.6
μW/cm
2
, gain = 16
×
λ
p
= 850 nm, ITIME = 0xF6 (27 ms)
E
e
= 220
μW/cm
2
, gain = 16
×
λ
p
= 625 nm
λ
p
= 850 nm
λ
p
= 625 nm ITIME = 0xF6 (27 ms)
nm,
R
e
Irradiance responsivity
λ
p
= 850 nm ITIME = 0xF6 (27 ms)
nm,
8
×
Gain scaling (relative to 1
×)
16
×
111
×
Ch0
Ch1
Ch0
Ch1
Ch0
Ch1
Ch0
Ch1
Ch0
Ch1
7
7
15
15
97
100
Ch0
Ch1
Ch0
Ch1
Ch0
Ch1
Ch0
Ch1
Ch0
Ch1
10.8
10 8
41
4000
4000
5000
700
5000
2750
15.8
15 8
55
29.1
4
22.8
12.5
8
8
16
16
107
115
9
9
17
17
115
125
counts/
(μW/
cm
2
)
20.8
20 8
68
%
6000
counts
TEST CONDITIONS
CHANNEL
MIN
705
0
0
TYP
750
1
1
MAX
795
5
5
37887
37887
65535
65535
6000
counts
counts
UNIT
kHz
ADC count value
ADC count value ratio: Ch1/Ch0
×
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
Δλ�½
= 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
Δλ�½
= 42 nm.
4. The integration time T
int
, is dependent on internal oscillator frequency (f
osc
) and on the number of integration cycles (ITIME) in the
Timing Register (0xFF) as described in the Register section. For nominal f
osc
= 750 kHz, nominal T
int
= 2.7 ms
×
ITIME.
Copyright
E
2010, TAOS Inc.
r
r
The
LUMENOLOGY
r
Company
4
www.taosinc.com
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
