High-Sensitivity Light-to-Voltage Converter
TSL257
High-Sensitivity Light-to-Voltage
Converter
General Description The TSL257 is a high-sensitivity low-noise light-to-voltage
optical converter that combines a photodiode and a
transimpedance amplifier on a single monolithic CMOS
integrated circuit. Output voltage is directly proportional to
light intensity (irradiance) on the photodiode. The TSL257 has
a transimpedance gain of 320MΩ. The device has improved
offset voltage stability and low power consumption and is
supplied in a 3-lead clear plastic sidelooker package with an
integral lens. When supplied in the lead (Pb) free package, the
device is RoHS compliant.
Ordering Information and Content Guide appear at end of
datasheet. Key Benefits & Features
The benefits and features of TSL257, High-Sensitivity
Light-to-Voltage Converter are listed below:
Figure 1:
Added Value of Using TSL257 Benefits Features • Enables Extremely Fast Response to Change • Single Photo-Diode and Trans Impedance Architecture • Enables Fast Response to Visible Light in
Range of 400nm to 700nm Wavelengths • 160μs Output Rise-Time Response • Provides for High Sensitivity to Detect a Small
Change in Light • High Irradiance Responsivity:
Typically 1.68V/(μW/cm2) at λp = 645nm • Provides Additional Sensitivity Advantages • 2x Gain Lens • Provides Full Dynamic Range • Rail-To-Rail Output Swing
• Converts Light Intensity to Output Voltage …
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