Optical sensors
Fast, sensitive
501225 501224
WS
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Wavelength-sensitive diodes (WS)

Wavelength-sensitive photodiodes utilize the effect of the wavelength-specific absorption depth of radiation in silicon. For this purpose, two p-n junctions are aligned vertically in the silicon crystal, thus enabling separate signal detection within vertically adjacent ranges. Such a configuration is particularly useful for the wavelength detection of monochromatic input signals. The calculation then merely requires the formation of a quotient between two photocurrents. The calculation of a color temperature from a non-monochromatic input signal requires two such detectors and an additional optical filter.

Special features
  • Two vertically aligned p-n junctions
  • Measuring range: 450-950 nm
  • Particularly suitable for monochromatic light
Downloads
Wavelength-sensitive diodes of First SensorTechnical specifications and PDF datasheet
Order # Chip Package Dark current
(nA); 5 V
Rise time (ns)
Diode 1
0 V, 1 kΩ
Rise time (ns)
Diode 2
0 V, 1 kΩ
501225 WS7.56 TO5i 5 10000 1000
501224 WS7.56 TO5 10 10000 1000
Technical specifications and PDF datasheet *
Order # Package Messbereich
501225 TO5i 450-950 nm
501224 TO5 450-950 nm
* For large screens, this table contains more technical specifications. For mobile devices, they are not shown.

For price and delivery information or any other question please contact First Sensor.
Company
First Sensor is one of the world's leading suppliers in the field of sensor systems. In the growth market of sensor systems, First Sensor develops and produces customer-specific solutions for the ever-increasing number of applications in the industrial, medical, and mobility target markets. Our goal here is to identify, meet and solve the challenges of the future with our innovative sensor solutions early on.
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In many market-specific applications, sensors are components that are critical to your success. First Sensor is the partner you need on projects that call for careful selection, customized adaptation and the highest standards of excellence. Our Business Units Industrial, Medical and Mobility are clearly aligned to the core markets of industrial applications, medical technology as well as automotive and transport.
Tailored Solutions
In the growth market of sensor systems, First Sensor develops and produces customer-specific sensors, electronics, modules and complex systems for the ever-increasing number of applications in the industrial, medical, and mobility target markets. As a solution provider the company offers complete development services from a first draft and proof of concept up to the development of prototypes and finally serial production. First Sensor offers comprehensive development expertise, state-of-the-art packaging technologies and production capacities in clean rooms from ISO class 8 to 5.
Tailored Solutions
In the growth market of sensor systems, First Sensor develops and produces customer-specific sensors, electronics, modules and complex systems for the ever-increasing number of applications in the industrial, medical, and mobility target markets. As a solution provider the company offers complete development services from a first draft and proof of concept up to the development of prototypes and finally serial production. First Sensor offers comprehensive development expertise, state-of-the-art packaging technologies and production capacities in clean rooms from ISO class 8 to 5.
Career
Innovation, excellence, proximity – these are our values, our ambition, our drive. Anything less is not an option. Our sensor solutions stand for technical innovation and economic growth. As such, they form the basis for the development and application of new technologies in almost all areas of life. We aim to shape this future together with you.