TSL257T View Datasheet(PDF) - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS
Part Name
Description
MFG CO.
'TSL257T' PDF : 10 Pages View PDF
TSL257T
HIGH-SENSITIVITY
LIGHT-TO-VOLTAGE CONVERTER
TAOS065B − APRIL 2007
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 s
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −25°C to 85°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −25°C to 85°C
Solder conditions in accordance with JEDEC−J−SRD−020A, maximum temperature . . . . . . . . . . . . . . 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.
NOTE 1: All voltages are with respect to GND.
Recommended Operating Conditions
Supply voltage, VDD
Operating free-air temperature, TA
MIN MAX UNIT
2.7 5.5 V
0
70 °C
Electrical Characteristics at VDD = 5 V, TA = 25°C, λp = 640 nm, RL = 10 kΩ (unless otherwise noted)
(see Notes 2, 3, and 4)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNIT
VD
Dark voltage
Ee = 0
0
15
mV
VOM
VO
Maximum output voltage swing
Output voltage
VDD = 4.5 V,
No Load
VDD = 4.5 V,
RL = 10 kΩ
Ee = 2.93 μW/cm2
4.49
V
4 4.2
1.5
2 2.5
V
αVD Temperature coefficient of dark voltage (VD)
Re
Irradiance responsivity
TA = 0°C to 70°C
See Note 5
−15
μV/°C
680
mV/(μW/cm2)
PSRR Power supply rejection ratio
fac = 100 Hz, see Note 6
55
dB
IDD Supply current
fac = 1 kHz, see Note 6
Ee = 2.93 μW/cm2
35
dB
2 3.8
mA
NOTES: 2. Measured with RL = 10 kΩ between output and ground.
3. Optical measurements are made using small-angle incident radiation from a light-emitting diode (LED) optical source.
4. The input irradiance Ee is supplied by an AlInGaP LED with peak wavelength λp = 640 nm.
5. Irradiance responsivity is characterized over the range VO = 0.1 V to 4.5 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.
6. Power supply rejection ratio PSRR is defined as 20 log (ΔVDD(f)/ΔVO(f)) with VDD(f = 0) = 5 V and VO(f = 0) = 2 V.
Switching Characteristics at VDD = 5 V, TA = 25°C, λp = 640 nm, RL = 10 kΩ (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNIT
tr Output pulse rise time, 10% to 90% of final value
See Note 10 and Figure 1
tf Output pulse fall time, 10% to 90% of final value
See Note 10 and Figure 1
ts Output settling time to 1% of final value
See Note 10 and Figure 1
Integrated noise voltage
f = dc to 1 kHz Ee = 0
f = 10 Hz
Ee = 0
Vn Output noise voltage, rms
f = 100 Hz
Ee = 0
f = 1 kHz
NOTE 7: Switching characteristics apply over the range VO = 0.1 V to 4.5 V.
Ee = 0
160 250
μs
150 250
μs
330
μs
200
μVrms
6
6
μV/√Hz rms
7
Copyright E 2007, TAOS Inc.
2
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www.taosinc.com
The LUMENOLOGY r Company
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