GENERAL DESCRIPTION
●The ADA4940-1/ADA4940-2 are low noise, low distortion fully differential amplifiers with very low power consumption. They are an ideal choice for driving low power, high resolution, high performance SAR and sigma-delta (Σ-Δ) analog-to-digital converters (ADCs) with resolutions up to 16 bits from dc to 1 MHz on only 1.25 mA of quiescent current. The adjustable level of the output common-mode voltage allows the ADA4940-1/ADA4940-2 to match the input common-mode voltage of multiple ADCs. The internal common-mode feedback loop provides exceptional output balance, as well as suppression of even-order harmonic distortion products.
●FEATURES
●Small signal bandwidth: 260 MHz
●Ultralow power 1.25mA
●Extremely low harmonic distortion
● −122 dB THD at 50 kHz
● −96 dB THD at 1 MHz
●Low input voltage noise: 3.9 nV/√Hz
●0.35 mV maximum offset voltage
●Balanced outputs
●Settling time to 0.1%: 34 ns
●Rail-to-rail output: −VS + 0.1 V to +VS − 0.1 V
●Adjustable output common-mode voltage
●Flexible power supplies: 3 V to 7 V (LFCSP)
●Disable pin to reduce power consumption
●ADA4940-1 is available in LFCSP and SOIC packages
