SBOS932C January 2020 – March 2021 THP210
The THP210 is a fully differential amplifier (FDA) configuration that offers high dc precision, very low noise and harmonic distortion in a single, low-power amplifier. The FDA is a flexible device where the main aim is to provide a purely differential output signal centered on a user-configurable, common-mode voltage that is usually matched to the input common-mode voltage required by an analog-to-digital converter (ADC). The circuit used for characterization of the differential-to-differential performance is seen in Figure 7-1
A similar circuit is used for single-ended to differential measurements, as shown in Figure 7-2.
The characterization plots fix the RF (RF1 = RF2) value at 2 kΩ, unless otherwise noted. This value can be adjusted to match the system design parameters with the following considerations in mind: