ADA4932 Fully Differential Amplifier Single-Ended to Differential Driver

Application

This circuit shows ADA4932 Fully Differential Amplifier converting a grounded single-ended sine input into a balanced differential output pair. It is a practical starting point for ADC drivers, line drivers, and other circuits that need equal-and-opposite output swings.

Design Context

The input source drives IN+ through RGP while IN- is referenced through the matched RGN resistor. RFP and RFN close the differential feedback paths from the output sense pins back to the inputs. V+ and V- provide split supplies, and VOCM sets the output common-mode target.

Expected Behavior

Vin is a small single-ended sine wave. Vout+ and Vout- should swing in opposite directions around the VOCM level, making the differential signal easy to compare on the chart.

Key Values

• Input: 100 mV, 1 kHz sine wave.
• Input resistors: 1 kOhm matched pair.
• Feedback resistors: 1 kOhm matched pair.
• Supplies: +5 V and -5 V.
• VOCM: 0 V.

Suggested Experiments

• Increase the input amplitude and watch the differential output swing grow.
• Change VOCM to shift both outputs together without changing their differential relationship.
• Change RFP and RFN together to explore closed-loop gain.

Featured Component

ADA4932 Fully Differential Amplifier is the fully differential amplifier. Its grouped IN+/IN-, OUT+/OUT-, and feedback-sense pins make the signal pairing visible in the schematic.