ADA4945-1ACPZ-R2

ADA4945-1 is a low noise, low distortion, fully differential amplifier with two selectable power modes. The low DC offset, DC offset drift and excellent dynamic performance of the ADA4945-1 makes it well suited for a variety of data acquisition and signal processing applications. The device is an ideal choice for driving high resolution, high performance SAR and Σ-Δ ADCs on 4mA of quiescent current (full power mode). The device can also be selected to operate on 1.4mA of quiescent current (low power mode) to scale the power consumption to the desired performance necessary for an ADC drive application. The adjustable common-mode voltage allows the ADA4945-1 to match the input common-mode voltage of multiple ADCs. Typical application includes low power Σ-Δ, pulsar® and SAR ADC drivers single-ended to differential converters, differential buffers, medical imaging process and control portable electronics.

• Broad power supply range from 3V to 10V
• Wide input common-mode voltage range from -VS to +VS - 1.3V
• Rail to rail output and fully specified dual power mode operation
• 4mA full power mode (145MHz) 1.4mA low power mode (80MHz)
• Full power mode (fast settling time 18bit: 100ns and 16bit: 50ns )
• Low harmonic distortion (-133/-140dBc HD2/HD3 at 1KHz and -133/-116dBc HD2/HD3 at 100KHz)
• Input voltage noise of 1.8nV/√Hz, f = 100KHz and ±115μV max offset voltage from -40°C to +125°C
• Adjustable output clamps for ADC input protection
• 16 lead LFCSP package
• Operating temperature range from -40°C to 125°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party