The OPA858 can be configured with single-sided supplies or split supplies; see also Figure 9-8 . Split-supply operation using balanced supplies with the input common-mode set to ground can help ease lab testing (because most signal generators, network analyzers, spectrum analyzers, and other lab equipment typically reference inputs and outputs to ground). In split-supply operation, connect the thermal pad to the negative supply.

Newer systems use a single power supply to improve efficiency and reduce the cost of the extra power supply. The OPA858 can be used with a single positive supply (negative supply at ground) with no change in performance if the input common-mode and output swing are biased within the linear operation of the device. In single-supply operation, level shift the dc input and output reference voltages by half the difference between the power supply rails. This configuration maintains the input common-mode and output load reference at midsupply. To eliminate gain errors, the source driving the reference input common-mode voltage must have low output impedance across the frequency range of interest. In this case, connect the thermal pad to ground.