ams AG - global leader in the design and manufacture of high performance analog ICs (integrated circuits)

TSL257 Light-to-Voltage

High sensitivity sidelooker package


The TSL257 is a high-sensitivity low-noise light-to-voltage optical converter that combines a photodiode and a trans-impedance amplifier on a single monolithic CMOS integrated circuit. Output voltage is directly proportional to light intensity (irradiance) on the photodiode. The TSL257 has a trans-impedance gain of 320 MΩ. 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.

Key Features

  • Single photo-diode and trans impedance architecture
  • 160µs output rise-time response
  • High Irradiance Responsivity 1.68mV/(µW/cm2) @ λp = 645nm
  • 2X gain lense
  • Rail-to-rail output swing

Key Benefits

  • Enables extremely fast response to change
  • Enables fast response to visible light in range of 400nm to 700nm wavelengths
  • Provides for high sensitivity to detect a small change in light
  • Provides additional sensitivity advantages
  • Provides full dynamic range

Product Facts

Operating Voltage [V] 2,7-5,5
Responsivity [uW/cm²] Ultra: >400
Responsivity Wavelength [nm] 640
Fast Response Time
Low Noise
Visible Light Cutoff Filter and Lens
Temperature Range [°C] -25 to 85
Packages S-3, SM-3, T-8

Additional Information

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