ADC0831 failure
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Hello,
I'm using an ADC0831 to monitor an input voltage to a BS2 circuit.
The circuit had been functioning fine until I ported it from a large
breadboard to a smaller board that could be incorporated into a test
module.
Upon porting to the smaller board, the ADC0831 appears to fail. What
I observe is that the DO pin (pin 6) remains at a constant voltage
without fluctuation (even though the input voltage to Pin2 from a
remote device _is_ fluctuating).
Here's my configuration wrt ADC0831 pins: Pin1 to Vdd, Pin2 receives
low-voltage input from remote device, Pin3 to Vss, Pin4 to Vss, Pin5
to Vdd, Pin6 to BS2 P1, Pin7 to BS2 P0, and Pin8 to Vdd.
In the original configuration, the BS2 monitored Pin6 to determine
when the voltage had dropped. The output from Pin6 would fluctuate
in response to the input at Pin2. When running on the reconfigured
board, Pin6 appears to remain low (no fluctuation, regardless of
changing input at Pin2).
Questions: A) Are the ADC0831 chips generally robust, or, is it
fairly common for them to fail?
Any tips regarding the best method of isolating and debugging the
problem?
All input appreciated!
Thanks,
--Donn Morse
I'm using an ADC0831 to monitor an input voltage to a BS2 circuit.
The circuit had been functioning fine until I ported it from a large
breadboard to a smaller board that could be incorporated into a test
module.
Upon porting to the smaller board, the ADC0831 appears to fail. What
I observe is that the DO pin (pin 6) remains at a constant voltage
without fluctuation (even though the input voltage to Pin2 from a
remote device _is_ fluctuating).
Here's my configuration wrt ADC0831 pins: Pin1 to Vdd, Pin2 receives
low-voltage input from remote device, Pin3 to Vss, Pin4 to Vss, Pin5
to Vdd, Pin6 to BS2 P1, Pin7 to BS2 P0, and Pin8 to Vdd.
In the original configuration, the BS2 monitored Pin6 to determine
when the voltage had dropped. The output from Pin6 would fluctuate
in response to the input at Pin2. When running on the reconfigured
board, Pin6 appears to remain low (no fluctuation, regardless of
changing input at Pin2).
Questions: A) Are the ADC0831 chips generally robust, or, is it
fairly common for them to fail?
Any tips regarding the best method of isolating and debugging theproblem?
All input appreciated!
Thanks,
--Donn Morse
Comments
<donnmo@l...> wrote:
> Hello,
>
> I'm using an ADC0831 to monitor an input voltage to a BS2 circuit.
> The circuit had been functioning fine until I ported it from a
large
> breadboard to a smaller board that could be incorporated into a
test
> module.
>
> Upon porting to the smaller board, the ADC0831 appears to fail.
What
> I observe is that the DO pin (pin 6) remains at a constant voltage
> without fluctuation (even though the input voltage to Pin2 from a
> remote device _is_ fluctuating).
>
> Here's my configuration wrt ADC0831 pins: Pin1 to Vdd, Pin2
receives
> low-voltage input from remote device, Pin3 to Vss, Pin4 to Vss,
Pin5
> to Vdd, Pin6 to BS2 P1, Pin7 to BS2 P0, and Pin8 to Vdd.
>
> In the original configuration, the BS2 monitored Pin6 to determine
> when the voltage had dropped. The output from Pin6 would fluctuate
> in response to the input at Pin2. When running on the reconfigured
> board, Pin6 appears to remain low (no fluctuation, regardless of
> changing input at Pin2).
>
> Questions: A) Are the ADC0831 chips generally robust, or, is it
> fairly common for them to fail?
>
the
> problem?
>
> All input appreciated!
>
> Thanks,
> --Donn Morse