ADA4940-2

Data Sheet 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 APPLICATIONS Low power PulSAR®/SAR ADC drivers Single-ended-to-differential conversion Differential buffers Line drivers Medical imaging Industrial process controls Portable electronics 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. With the ADA4940-1/ADA4940-2, differential gain configurations are easily realized with a simple external feedback network of four resistors determining the closed-loop gain of ...