text.skipToContent text.skipToNavigation
Product Variant Information section
Product Specification Section
Pricing Section

Stock: 500

On Order: 0
Factory Stock:Factory Stock: 0
Factory Lead Time: N/A
Minimum Order: 500
Multiple Of: 500
Quantity Web Price
500 $1.07
1,000 $0.96
1,500 $0.955
2,500 $0.945
5,000+ $0.935


Attributes Table
Type Light to Voltage Converter
Wavelength 645nm
Forward (Drive) Current 3.5mA
Features and Applications

The TSL257-LF Series 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 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.


  • Converts Light Intensity to Output Voltage
  • Monolithic Silicon IC Containing Photodiode, Operational Amplifier, and Feedback Components
  • High Sensitivity
  • Single Voltage Supply Operation (2.7 V to 5.5 V)
  • Low Noise (200 μVrms Typ to 1 kHz)
  • Rail-to-Rail Output
  • High Power-Supply Rejection (35 dB at 1 kHz)
  • Compact 3-Leaded Plastic Package
  • RoHS Compliant (LF Package Only)

View the Series of TSL25 Opticle Sensors & Switches