Differential Amplifiers

Differential Amplifiers

Texas Instruments THS4561 Fully Differential Amplifier (FDA) Texas Instruments THS4561 Fully Differential Amplifier (FDA) offers a simple interface from single-ended sources to the differential output required by precision analog-to-digital converters (ADCs). THS4561 is designed for a very low, 8Hz, 1/f voltage noise corner and low, 130dB total harmonic distortion (THD) while consuming on a 775µA quiescent current. The THS4561 is well suited for power-sensitive data acquisition (DAQ) systems where high performance is required with the best signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) through the amplifier and ADC combination.

The Texas Instruments THS4561 features the required negative rail input when interfacing a dc-coupled, ground-centered, source signal to a single-supply, differential-input ADC. Low DC error and drift terms support the emerging high-speed and high-resolution successive approximation register (SAR) and delta-sigma (ΔΣ) ADC input requirements. A 2.85V to 12.6V supply range with a flexible output common-mode setting with low headroom to the supplies supports a wide range of ADC input and digital-to-analog converter (DAC) output requirements.