The ADA4940-1 / ADA4940-2 are low noise, low distortion 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 18 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 the amplifier. The ADA4940-1 / ADA4940-2 are fabricated using Analog Devices, Inc., complementary bipolar process, enabling them to achieve very low levels of distortion with an input voltage noise of only 3.9 nV/√Hz. The low dc offset and excellent dynamic performance of the ADA4940-1 / ADA4940-2 make them well suited for a variety of data acquisition and signal processing applications. The ADA4940-1 is available in a Pb-free, 3 mm × 3 mm, 16-lead LFCSP. The ADA4940-2 is available in a Pb-free, 4 mm × 4 mm, 24-lead LFCSP. The pinout is optimized to facilitate printed circuit board (PCB) layout and minimize distortion. The ADA4940-1 / ADA4940-2 are specified to operate over the −40°C to +125°C temperature range. Applications * Low power ADC drivers * Single-ended-to-differential converters * Differential buffers * Line drivers * Medical Imaging * Industrial Process Control * Portable Electronics * 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 * Available in LFCSP and SOIC packages https://elecena.pl/product/2478960/ultralow-power-low-distortion-adc-driver 2012-01-14 https://elecena.pl/product/2478960/ultralow-power-low-distortion-adc-driver 2018-03-29 https://elecena.pl/product/2478960/ultralow-power-low-distortion-adc-driver 2025-01-18