8.4 Device Functional Modes

8.4.1 Split-Supply and Single-Supply Operation

The OPA955 can be configured with single-sided supplies or split supplies; see also Figure 9-1. 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 OPA955 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.

9 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification,

and TI does not warrant its accuracy or completeness. TI’s customers are responsible for

determining suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

OPA955

SLOSEE6 – JULY 2026

www.ti.com

12

Submit Document Feedback

Copyright © 2026 Texas Instruments Incorporated

Product Folder Links: OPA955