SFH 206K

Series:	--
Packaging:	Bulk
Part Status:	Active
Wavelength:	850nm
Color - Enhanced:	--
Spectral Range:	400nm ~ 1100nm
Diode Type:	PIN
Responsivity @ nm:	0.62 A/W @ 850nm
Response Time:	20ns
Voltage - DC Reverse (Vr) (Max):	32V
Current - Dark (Typ):	2nA
Active Area:	7.02mm²
Viewing Angle:	120°
Operating Temperature:	-40°C ~ 100°C
Mounting Type:	Through Hole
Package / Case:	Radial

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Introduction

SFH 206K is a type of short wave infrared receiver which is used in applications where reliable data transmission is a must. It is a single-stage integrated circuit with an internal analog amplifier. The SFH 206K employs nonlinear diode-capacitor networks to adjust for shifts in voltage and current, and to provide a suitable output. It has two types of pins, one for input and one for output.

Application Field

The SFH 206K is primarily used for sensing the transmission of energy in optical systems. Some typical applications where it is commonly used include:

• Optical communication systems
• Optical navigation systems
• Inspection and testing systems
• Industrial sensing applications
• Measurement and detection of short wave infrared radiation

The SFH 206K can also be used for medical applications such as detecting the presence and/or intensity of laser beams. In this case, the output signal will activate an alarm or other device for warning purposes.

Working Principle

The SFH 206K utilizes an integrated detector diode, which is combined with a negative feedback circuit, to give a low noise, wide dynamic range device. It is nominally optimized to detect light in the range of 780-950 nm which is a short-wave-infrared (SWIR) wavelength. The detector diode is an avalanche type which has a built-in protection circuit that can protect it from over-voltage and excess current. Once the SWIR light enters the SFH 206K, it passes through the detector diode and a potential difference between the cathode and the anode is generated. This potential difference is then amplified and the resulting output signal is used as the basis for controlling the alarms and other circuit devices. The combined negative feedback circuit and detector diode results in a low noise, wide dynamic range device which makes it suitable for sensing both small and large signals. The SFH 206K is a sensitive device that can detect very small changes in the intensity of the incident SWIR light and it has a high sensitivity to single flash. It is also insensitive to visible light and heat which further adds to its value in various applications.

Conclusion

SFH 206K is an excellent choice for applications which require reliable data transmission. It utilizes a detector diode combined with a negative feedback circuit for low noise and wide dynamic range. It is optimized for sensing light in the short-wave-infrared range of 780-950 nm and is insensitive to visible light and heat. With its high sensitivity and low noise, the SFH 206K can be used for applications such as optical communications systems, inspection and testing systems, industrial sensing applications, and medical applications.

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