Data Sheet
AD5940
LOW POWER POTENTIOSTAT
The potentiostat can also be used a standard buffer output to
The AD5940 has a low power potentiostat that sets and controls
the bias voltage of an electrochemical sensor. Typically, the
output of the potentiostat is connected to CE0. The noninverting
input is connected to VBIAS0 voltage and the inverting input is
connected to RE0 as shown in Figure 17. For an electrochemical
cell, the potentiostat maintains the bias voltage on the reference
electrode (RE0) by sourcing or sinking current through the
counter electrode (CE0).
output VBIAS0 voltage onto CE0. To achieve this, the inverting
input is connected to the output of the potentiostat by closing
the SW10 switch, as shown in Figure 19.
The output of the potentiostat can be connected to various
package pins through the switch matrix (see the Programmable
Switch Matrix section for details). There are a number of
configurable switch options around the potentiostat to provide
numerous configuration options (see Figure 19).
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