PD42-21C/TR8 Sensors, Transducers

Optical Sensors - Photodiodes encompass a wide range of detector technologies that are used to measure light, both visible and infrared. These kinds of devices can be used to detect changes in the arrival of light or to measure the amount of incident radiation across different wavelengths. One example of this type of device is the PD42-21C/TR8, an optoelectric transducer that utilizes a preamplifier built into the package for increased sensitivity.

The PD42-21C/TR8 is designed for applications that require a low-noise, high-performance solution for detecting photons. It contains a silicon photodiode, a transimpedance amplifier, and a low-noise integrated preamplifier in a single hermetically sealed package. This transducer is designed to detect infrared radiation in the spectral range from 790nm to 850nm. It has a wide operating temperature range from -55°C to +125°C and an extended storage temperature range from -65°C to +175°C.

The sensitivity of the PD42-21C/TR8 is determined by its responsivity, which measures the ability of the device to convert incident light into an electrical current. The responsivity of the PD42-21C/TR8 is 0.5 A/W, meaning that the device can produce 0.5 A for every watt of incident infrared radiation. The gain of the device is also adjustable, allowing for more precise applications. The PD42-21C/TR8 has a noise figure of 4.5 dB, meaning that it can reduce the noise of an optical system by 4.5 dB.

The PD42-21C/TR8 is a compact transducer with a wide range of application possibilities. It can be used in a variety of systems, such as photovoltaic cells, solar collectors, lights harvesting cells, fiber-optic communications, biomedical instruments, and machine vision systems. Its low noise figure makes it well suited for use in communication systems. It can also be used in spectrometric instruments to measure and analyze light in different wavelengths. Additionally, the PD42-21C/TR8 can be used for current and power monitoring applications.

The working principle of the PD42-21C/TR8 is straightforward. It consists of an active layer of silicon that absorbs high-energy light, such as the infrared radiation that the device is designed to detect. The absorbed light then generates a current that is measured by the preamplifier built into the device. This current is then amplified and can be used to measure changes in the incident light.

The PD42-21C/TR8 is a versatile, low-cost, low-noise optoelectric transducer that is designed for detecting infrared radiation in a wide range of applications. Its ability to accurately measure and detect changes in light makes it a valuable tool for a variety of optical sensing applications.