180MHz, Low-Noise, Low-Distortion, Fully Differential Op Amp/ADC Driver

The MAX44206 is a low-noise, low-distortion fully differential operational amplifier suitable for driving high-speed, high-resolution, 20-/18-/16-bit SAR ADCs, including the MAX11905 ADC family. Featuring a combination of wide 2.7V to 13.2V supply voltage range and wide 400MHz bandwidth, the MAX44206 is suitable for low-power, high-performance data acquisition systems.

The MAX44206 offers a VOCM input to adjust the output common-mode voltage, eliminating the need for a coupling transformer or AC-coupling capacitors. This adjustable output common-mode voltage allows the MAX44206 to match the input common-mode voltage range of the ADC following it. Shutdown mode consumes only 6.8µA and extends battery life in battery-powered applications or reduces average power in systems cycling between shutdown and periodic data readings.

The MAX44206 is available in an 8-pin µMAX® package and is specified for operation over the -40°C to +125°C temperature range.

Applications

* Active Filters * Fully-Differential Signal Conditioning * High-Speed Process Control * Medical Imaging * Single-Ended to Differential Conversion

* Low Input Noise Drives Precision SAR ADCs

* 3.1nV/ at 1kHz

* 200nVP-P from 0.1Hz to 10Hz

* High Speed for DC and AC Applications

* Gain-Bandwidth Product 400MHz

* -3dB Gain-Bandwidth Product 180MHz

* Slew Rate 180V/µs

* Ultra-Low Distortion Drives AC Inputs to 20-Bit SAR ADCs

* HD2 = -141dB, HD3 = -152dB at fIN = 10kHz, VOUT,DIFF = 2VP-P

* HD2 = -106dB, HD3 = -115dB at fIN = 1MHz, VOUT,DIFF = 2VP-P

* Wide Supply Range (2.7V to 13.2V) Drives Unipolar or Bipolar (±6.6V) Signals

* 3.7mA Quiescent Supply Current with Only 6.8µA Shutdown Current

* 8-Pin µMAX Package Saves Board Space