KCC's Quizzes AQQ305 about a mutual exponentiation equation
1. Quote of the month: "A train station is where a train stops. A bus station is where a bus stops. I have a work station on my desk, so..." - unknown
2. Quiz AQQ305 about finding a mutual exponential equation
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September Monthly Blog Quiz! Read the blog, take the quiz, and you could win a gift card
Quiz: How Well Do You Know Adaptive Power Switching?
Is your I/O module overheating? The AD74416H's Adaptive Power Switching (APS) can cut heat dissipation by up to 40% — but how well do you really understand how it works?
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MAX6070
Production
The MAX6070/MAX6071 offer a very low noise and low-drift voltage reference in a small 6-pin SOT23 package. These devices provide a 1/f noise voltage of...
Datasheet
MAX6070 on Analog.com
I am using a MAX6070BAUT25+T. The inital output is 2.417V and is reproducible using a second chip. Circuit is shown below. I have seen this problem before and it forced us to scrap the design. Is there any recognized remedy? Input voltage is measured at 5.0389V.
Hi, it looks like you do not have an output capacitor on OUTF. A capacitor between 0.1uF and 10uF is required.
See image below from datasheet page 21.
The load is purely resistive, approximately 5 kOhm. There are no transients, 30 second circuit stabilization time allowed prior to measurement. Why would a capacitor make a difference?
Transient/noise benefits aside, MAX6070 was designed to be used with an output capacitor. Failing to include a capacitor or using a capacitance outside the recommended 0.1uF to 10uF can lead to the reference being only marginally stable or instable, which can cause VOUT to settle to the incorrect output voltage.
This is alluded to in electrical characteristics table:
You are correct. I have applied a 0.1 uF, 100V, X7R capacitor to the output and it has now settled at 2.499V.
Thank you!!!
