AD7938: Overvoltage at analog inputs

Question We are using AD7938 CONVERTOR. The limit for analog inputs is -0.3V. In our application we could potientially go to -0.35, if we were to limit the current to say 3mA would this cause permanent damage? Answer The part won’t damage however we cannot guarantee the performance and functionality if you are exceeding max rating specifications. It’s very good idea to limit the current to 3 mA, because of that you shouldn’t see any failures.

When in byte mode, the AD7938 channel ID is read on DB4 to DB6 when HBEN is high.

Q When in byte mode, the AD7938 channel ID is read on DB4 to DB6 when HBEN is high. How do you read the channel number when in Word Mode ? A It is only possible to read the channel ID in byte mode.

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Products Mentioned

AD7938-6 Production
The AD7938-6 is a 12-bit, high speed, low power, successive approximation (SAR) analog-to-digital converter (ADC). The part operates from a single 2.7...
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AD7938-6 on Analog.com

Table of Contents

+Documents
+General: FAQ
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+AD7091R Conversion Result Change
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- AD7938: Overvoltage at analog inputs
- When in byte mode, the AD7938 channel ID is read on DB4 to DB6 when HBEN is high.
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