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  • LOG112: Compensating for Errors

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    Part Number: LOG112 Other Parts Discussed in Thread: LOG114 , LOG101 , LOG104 Hello, I would like to use the LOG112 in a new design. I need best possible accuracy. I have a few questions about how to accomplish that. 1. I plan to measure over 5 decades…
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  • LOG112: is there any reference design or application note for PIN diode application ?

    TI Thinks Resolved
    Part Number: LOG112 Other Parts Discussed in Thread: LOG114 Hi is there any reference design or application note for PIN diode application using LOG112 ? Thanks! PY Tsai
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  • LOG112: Tantalum bypass capacitor alternative

    Resolved
    Part Number: LOG112 Hi, We have been using log112 for our sensor signal conditioning for the past three years. Recently smoking was observed in a few boards and the issue is the 10uF tantalum decoupling capacitor used. What will be a better alternative…
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  • LOG112: High reliability requirement

    Resolved
    Part Number: LOG112 Other Parts Discussed in Thread: LOG114 , TL441 , , TL441-EP , LOG104 LOG112AIDR is Catalog (commercial) Part, we are looking for the automotive or Mill-Spec grade alternative part. Also Does TI offer any additional screening to increase…
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  • LOG112: Odd "oscillation" in Vlog output voltage at lower current levels (<400 nA)

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    Part Number: LOG112 I'm presenting this problem, not so much for troubleshooting our new design, but in hopes that someone may have seen this issue before. We are using the LOG112 to measure the return current of a high voltage (3.5kV) power supply…
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  • Log112 - voltage inputs - "limited to 3 decades"

    Other Parts Discussed in Thread: LOG112 , LOG114 Page 9 of the LOG112 data sheet has a paragraph labeled "Voltage Inputs". In the paragraph, it states, "the dynamic range is limited to approximately three decades of input voltage etc." How would I determine…

  • RE: Log112-Vlogout not coming as expected

    Hello Jayaram, Something is definitely not working correctly in your LOG112 circuit. Using case 1 as an example, the I 1 /I 2 ratio of 1:1 should produce an output voltage of 0 V, as you have stated. However, to achieve an output of 4.5 V indicates…
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  • LOG112 vs. LOG114 Response Time

    Resolved
    Other Parts Discussed in Thread: LOG114 , LOG112 Hello, I'm using the log 112 as a current sensor. I set I2 to 70.7nA as the reference current, and my input current I1 varies between 100pA and 50uA. I'm finding that I need a compensation capacitor Cc…
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    • Answered

  • Log112/114 minimum current input

    Resolved
    Other Parts Discussed in Thread: LOG114 Hi, The input current in the data sheets is mentioned from 100pA onwards. What happens when there is a open condition at the I1 current input? Does the Vlogout (log ( 0)) become FSO ? Can the log amp remain in…
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  • Log112 reference current regarding

    Other Parts Discussed in Thread: LOG112 , LOG114 Hi, We are using LOG112 amplifier for one of our applications. We are planning to generate a reference current of around 14 mA using a resistance of 180 ohm with the inbuilt reference voltage Vref(2.5V…

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