The common-mode voltage of the differential outputs of all four amplifier channels can be controlled simultaneously using the test point (TP2) or optional resistor divider formed by R17 and R33. If left unconnected, the amplifier output common mode will default to 1.1 V. By default, the transformers on the EVM will AC couple the outputs of the device and remove the effect of the output common-mode voltage. The transformer must be removed and shorts installed between the transformer input and output pads to match the board to a device that requires DC outputs with a specified common mode (such as an analog to digital converter).