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Photodiode
Related Posts

  • Forum Post: Re: Photodiode Amplifier problem

    Vinay Shrivastava
    Hi , Like your case i am also poor in electronics background however having reasonable control in MCU . In my project i need to use photodiode as position sensor by detecting laser light falling on the photodiode . I plan to use ADCs of microcontroller and scan voltages across all photodiodes . One having...
    on Sep 8, 2010

  • Forum Post: ACF2101 Switched Integrator

    WILLIAM ARCHAMBEAULT
    Hi All: I am working with a design that uses the IVC102 but I need to add a null offset to the input to zero the detector offset out. The IVC102 does not have an input that I can use on that chip but the ACF2101 show that it has both the + and - input available on the chip but can use it? I noticed...
    on Nov 17, 2010

  • Forum Post: looking for the photodiode preamplifier (the input current of typically 5-50 nA)

    Alex Baikov
    I'm looking for the photodiode preamplifier for a useful frequency range of at least 0-100 kHz with incident light powers of 10 nW. The chosen diode for this application is model FDS100 from Thorlabs. It has a sensitivity of roughly 0.50 A/W at 800 nm, an operating bias voltage...
    on Dec 10, 2010

  • Forum Post: OPA381, datasheet analyse

    Perhirin Steven
    Hi, First, happy new year!! (if it's still the right time) Second, I m currently working with an OPA381. I tried to use TINA_spice but I missing a parameter. On page 7, There is a current source as input of OPA381. How much current does it supply? On page 6, It's the same question about...
    on Jan 17, 2011

  • Forum Post: Re: How can I design a Photodiode Amplifier Circuit optimized for 470nm wavelength?

    Neil Albaugh
    Andreas; Your application requires very high bandwidth (100MHz to 1GHz) and high sensitivity at the same time-- this puts it out of range of a PIN photodiode. To achieve what you want, requires a detector that provides internal gain, such as an avalanche photodiode (APD) or even a photomultiplier...
    on Apr 24, 2011

  • Forum Post: Re: How can I design a Photodiode Amplifier Circuit optimized for 470nm wavelength?

    Neil Albaugh
    Grant; Your recommendations are all excellent but one-- that one is a trap that almost everyone falls into when first designing photodiode amplifiers. :...use as large a photodiode as you can but then be careful that the capacitance doesnt become too large to limit the frequency...." That...
    on Apr 25, 2011

  • Forum Post: Re: How can I design a Photodiode Amplifier Circuit optimized for 470nm wavelength?

    Neil Albaugh
    David; The best photodiode for your application depends on your signal level and bandwidth requirements as well as on the wavelength of your optical signal. High speed photodiodes are generally optimized for longer wavelengths while general purpose photodiodes peak at a shorter wavelength, even "blue...
    on Apr 25, 2011

  • Forum Post: Re: Good OpAmp choice for TIA in UI panel?

    Neil Albaugh
    Tom; Bruce's suggestion is a good one to follow. If, however, you have problems with the multiplexing your photodiodes into a transimpedance amplifier, you might consider using a transimpedance amplifier for each photodiode and placing the multiplexer at the output of the amplifiers. To prevent...
    on Jun 5, 2011

  • Forum Post: Good OpAmp choice for TIA in UI panel?

    Tom Schroetter
    Hello TI community! I am looking for a good opamp (single supply) in a transimpedance amplifier application and was hoping to get some recommendations from the experienced engineers here. We are developing a user interface panel that uses lot's of photodiodes to detect infrared light (pulsed...
    on Jun 5, 2011

  • Forum Post: Precision Photodiode comparator

    Julien GUY
    Dear, I found a "Precision Photodiode Comparator" application in the LM111 datasheet. Have you got an update of this circuit with ROHS components? Have you got technical notes about this application? Thanks and best regards.
    on Jun 16, 2011

  • Forum Post: How can I design a Photodiode Amplifier Circuit optimized for 470nm wavelength?

    David Walker
    Does anybody in this forum have experience with Photodiode Amps? I am fairly new to the analog design field. I've designed simple inverting amplifiers and band-pass filters before, but now I must design a Photodiode Amplifier. I have a couple different photodiodes made by Hamamatsu (S9219 and S7686...
    on May 22, 2009

  • Forum Post: Re: AFC2101 Photo-current and Noise

    Matt Hann
    Hi Nicholas, Sorry for the delay on this. Here are some answers to your questions: 1) Yes, the 8.17mV is a combination of charge injection, amplifier offset, and the integration of the input error current (input bias current). The AFC2101 begins its integration almost immediately after the switch...
    on Jul 16, 2011

  • Forum Post: LOG114

    Teodor Neagoe
    I am looking for answers and suggestions on TI’s LOG114 (Log Amp). LOG114 provides best results when the input is current (for example: photodiode output). However, for my application, we have to use it with voltage source. We would like to monitor the photodiode’s output (pulse) in two ways...
    on May 17, 2011

  • Forum Post: Please recommend an amp for my application

    Inyong Kwon
    Hello. I am a graduate student in U of Michigan. Our research group has made photodetectors by ourselves. It has been very successful. Now, for the next step, we would like to see the current shape from our detector on a oscilloscope. So, we are looking for special amplifiers because the output current...
    on Sep 13, 2011

  • Forum Post: Photodiode - op-amp questions

    Michael Churchill
    I have some questions about selection of a TI op-amp for a photodiode system. Sytem details: Goal is to measure absolute light levels (will calibrate photodiode system with known radiance standard) Hamamatsu S1336 photodiode (0.33 A/W, Id=50pA) Photovoltaic mode (0V bias) Necessary bandwidth...
    on Aug 12, 2011

  • Forum Post: PIN Photodiode - Transimpedance Amplifier and Filter in One Stage

    Alex52381
    Hello All, I was wondering if it was possible to build a PIN photodiode transimpedance amplifier that had a built in peaking filter characteristic (I've also heard this called a peaking equalizer or parametric equalizer). I only need a single frequency so I figured a peaking design might have...
    on Oct 3, 2011

  • Forum Post: Re: Photodiode transimpedance amplifer

    Ali Teke91715
    Hi John, Here is the schematic This the waweform, it is about 20cm between IR emiter and photodiode Here is the problem, it is about 1cm between IR emiter and photodiode Thank you,
    on Dec 19, 2011

  • Forum Post: Photodiode transimpedance amplifer

    Ali Teke91715
    Hello, I need to receive a raw infrared data streams by photodiode. The infrared emiter has different baudrates(300 to 115200 bps) and different light intensity . I used OPA314 op-amp as a transimpedance amplifer. In my tests, output signal looks good at low light intensities but the output signal...
    on Dec 19, 2011

  • Forum Post: Photodiode AC Amplifier

    Vianney P
    Hi, I want to build a photodiode amplifier to get an AC signal at a frequency of 1 Mhz. My photodiode has a parasitic capacitance of about 4pF. I want my system to work in a dark room or with sun light beams on the photodiode. => The photocurrent would vary from about 0.1µA to 70µA...
    on Apr 15, 2012

  • Forum Post: AC-Coupled Photodiode Noise

    Colin R.
    Hello, I've read through the discussions here regarding AC-Coupled photodiodes. Very helpful. The photodiode in my application receives light, modulated by sound waves hitting a reflective diaphragm. My design deals with audio band (20Hz - 20kHz). I've prototyped and understand the concept...
    on Mar 25, 2013

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