ADI ADA4938-1ACPZ-R7

The ADA4938-1/ADA4938-2 are low noise, ultralow distortion, high speed differential amplifiers. It is an ideal choice for driving high performance ADCs with resolutions up to 16 bits from dc to 27 MHz or up to 12 bits from dc to 74 MHz. The output common-mode voltage is adjustable over a wide range, allowing the ADA4938-1/ADA4938-2 to match the input of the ADC. The internal common-mode feedback loop also provides exceptional output balance as well as suppression of even-order harmonic distortion products. Full differential and single-ended-to-differential gain configurations are easily realized with the ADA4938-1/ADA4938-2. A simple external feedback network of four resistors determines the closed-loop gain of the amplifier. The ADA4938-1/ADA4938-2 are fabricated using the proprietary third generation, high voltage XFCB process, enabling it to achieve very low levels of distortion with an input voltage noise of only 2.6 nV / √Hz. The low dc offset and excellent dynamic performance of the ADA4938-1/ADA4938-2 makes them well-suited for a wide variety of data acquisition and signal processing applications.

• Extremely low harmonic distortion (HD) - 106 dBc HD2 @ 10 MHz - 82 dBc HD2 @ 50 MHz - 109 dBc HD3 @ 10 MHz - 82 dBc HD3 @ 50 MHz
• Low input voltage noise: 2.6 nV / √Hz
• High speed - 3 dB bandwidth of 1000 MHz, G = +1
• Slew rate: 4700 V / μs
• 0.1 dB gain flatness to 150 MHz
• Fast overdrive recovery of 4 ns
• 1 mV typical offset voltage
• Externally adjustable gain
• Differential-to-differential or single-ended-to-differential operation
• Adjustable output common-mode voltage
• Wide supply voltage range: ±5 V to ±5 V
• Single or dual amplifier configuration available

• ADC drivers
• Single-ended-to-differential converters
• IF and baseband gain blocks
• Differential buffers
• Line drivers