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

TSL261RD Light-to-Voltage

DIP package


The TSL250RD, TSL251RD, TSL260RD, and TSL261RD are light-to-voltage optical sensors, each combining a photodiode and a trans-impedance amplifier on a single monolithic IC. The TSL250RD and TSL260RD have an equivalent feedback resistance of 16 MΩ and a photodiode measuring 1 square mm. The TSL251RD and TSL261RD have an equivalent feedback resistance of 8 MΩ and a photodiode measuring 0.5 square mm. Output voltage is directly proportional to the light intensity (irradiance) on the photodiode. These devices have improved amplifier offset-voltage stability and low power consumption.

Key Features

  • Single photo-diode and trans impedance architecture
  • 70µs output rise-time response
  • High Irradiance Responsivity 15mV/(µW/cm2) @ λp = 940nm
  • 5mm x 6.2mm SOIC (D) package

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
  • Reduces board space requirements while simplifying designs 

Product Facts

Operating Voltage [V] 2,7-5,5
Responsivity [uW/cm²] High: 151-400
Responsivity Wavelength [nm] 640
Fast Response Time
Low Noise
Visible Light Cutoff Filter and Lens
Temperature Range [°C] -25 to 85
Packages SOIC = 8

Additional Information

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