Product details ADA4940-1 / ADA4940-2 are low noise, low distortion, ultra-low power differential amplifier ideal for driving resolutions up to 18, DC to 1 MHz low-power, high-resolution, high performance SAR type and Σ-Δ analog to digital converter (ADC), quiescent current of only 1.25 mA. Adjustable output common-mode level to make ADA4940-1 / ADA4940-2 ADC can be input with a plurality of common-mode voltage match. The internal common-mode feedback loop provides exceptional output balance and suppression of even-order harmonic distortion products. For the ADA4940-1 / ADA4940-2, with a simple external feedback network of four resistors of differential gain configurations are easily realized, the closed-loop gain of the feedback network determines the amplifier. ADA4940-1 / ADA4940-2 ADI's complementary bipolar process, enabling it 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 is particularly suitable for a variety of data acquisition and signal processing applications. ADA4940-1 uses 3 mm × 3 mm, 16-pin lead-free LFCSP. ADA4940-2 using 4 mm × 4 mm, 24-pin lead-free LFCSP. The pinout has been optimized to facilitate printed circuit board (PCB) layout and minimize distortion. ADA4940-1 and ADA4940-2 rated operating temperature range of? 40 ° C to + 125 ° C. Advantages and characteristics of small-signal bandwidth: 260 MHz low harmonic distortion 122 dB THD (50 kHz when) 96 dB THD (1 MHz at) low input voltage noise:?? 3.9 nV / √Hz Ultralow Power: 6.25 mW (5 V supply) Offset Voltage: 0.35 mV (max) Externally adjustable gain Differential-to-differential or single-ended-to-differential operation Balanced output 0.1% settling time: 34 ns output voltage swing:? VS + 0.1 V to + VS? 0.1 V adjustable output common mode voltage flexible power supply: 3 V to 7 V Applications Low power ADC drivers Single-ended-to-differential converters Differential buffers Line drivers Medical Imaging Industrial Process Control Portable electronic devices