TSL254R
LIGHT-TO-VOLTAGE OPTICAL SENSOR
TAOS071C − SEPTEMBER 2007
2
r
r
Copyright E 2007, TAOS Inc. The LUMENOLOGY r Company
www.taosinc.com
Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage, VDD (see Note 1) 6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output current, IO ±10 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Duration of short-circuit current at (or below) 25°C (see Note 2) 5 s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA −25°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg −25°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds (S Package) 260°C. . . . . . . . . . . . . . . . . . . .
Reflow solder, in accordance with J-STD-020C or J-STD-020D (SM Package) 260°C. . . . . . . . . . . . . . . . . . .
†Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltages are with respect to GND.
2. Output may be shorted to supply.
Recommended Operating Conditions
MIN NOM MAX UNIT
Supply voltage, VDD 2.7 5.5 V
Operating free-air temperature, TA0 70 °C
Electrical Characteristics at VDD = 5 V, TA = 25°C, λp = 635 nm, RL = 10 kΩ (unless otherwise noted)
(see Notes 3, 4, and 5)
TEST TSL254R
PARAMETER
CONDITIONS MIN TYP MAX UNIT
VDDark voltage Ee = 0 0 5 10 mV
VOM Maximum output voltage VDD = 4.5 V 3.0 3.3 V
VOOutput voltage Ee = 222 μW/cm21.5 2 2.5 V
Temperature coefficient of output voltage (V )
V
= 2 V @ 25°C, 2 mV/°C
αvo Temperature coefficient of output voltage (VO)
,
TA = 0°C to 70°C (see Note 6) 0.1 %/°C
ReIrradiance responsivity See Notes 5 and 7 9 mV/(μW/cm2)
IDD Supply current Ee = 222 μW/cm21.1 1.7 mA
NOTES: 3. Measurements are made with RL = 10 kΩ between output and ground.
4. Optical measurements are made using small-angle incident radiation from an LED optical source.
5. The input irradiance Ee is supplied by an AlInGaP LED with peak wavelength λp = 635 nm
6. The temperature coefficient of output voltage measurement is made by adjusting irradiance such that VO is approximately 2 V at
25°C and then with irradiance held constant, measuring VO while varying the temperature between 0°C and 70°C.
7. Irradiance responsivity is characterized over the range VO = 0.05 to 2.9 V. The best-fit straight line of Output Voltage VO versus
irradiance Ee over this range will typically have a positive extrapolated VO value for Ee = 0.
Dynamic Characteristics at VDD = 5 V, TA = 25°C, λp = 635 nm, RL = 10 kΩ (see Figure 1)
TSL254R
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
trOutput pulse rise time VO(peak) = 2 V 2.5 μs
tfOutput pulse fall time VO(peak) = 2 V 2.5 μs
Ee = 0, VO = VDf = 1 kHz 1
Ee = 0, VO = VDf = 10 kHz 1
VnOutput noise voltage VO = 2 V f = 1 kHz 1.5 μV/
Hz
VO = 2 V f = 10 kHz 1.5