+3V/+5V, 250MHz, SOT23 ADC Buffer Amplifiers with High-Speed Disable

 

Part Number	Replacement	Explanation

Description

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The MAX4285/MAX4286 single and MAX4287/MAX4288/MAX4387/MAX4388 dual ADC buffer amplifiers feature high-speed performance and single +3V supply operation. The MAX4285/MAX4286/MAX4288 and MAX4388 offer a disable feature that reduces power-supply current and places the outputs in a high-impedance state. All six devices operate from a +2.85V to +6.5V single supply or from ±1.425V to ±3.25V dual supplies. The common-mode input voltage range extends to the negative power-supply rail (ground in single-supply applications).

These devices require 20mA of quiescent supply current per amplifier while achieving a 250MHz -3dB bandwidth and a 350V/µs slew rate. The combination of an 8ns (to 0.1%) settling time, 88dBc (f = 5MHz) of SFDR, and up to 100mA output drive makes these amplifiers ideal for high-speed ADC drivers for communications and instrumentation applications. In addition, when disabled, their high output impedance makes them ideal for multiplexing applications.

The MAX4285/MAX4286 are available in space-saving 6-pin SOT23 and 8-pin SO packages. The MAX4287/MAX4387 come in 8-pin µMAX® and 8-pin SO packages, while the MAX4288/MAX4388 come in 10-pin µMAX and 14-pin SO packages.

MAX4285, MAX4286, MAX4287, MAX4288, MAX4387, MAX4388: Typical Operating Circuit Enlarge+

Key Features

• High Speed at 3V
  • 250MHz -3dB Bandwidth (MAX4285/87/88)
  • 150MHz -3dB Bandwidth (MAX4286, MAX4387/88)
  • 350V/µs Slew Rate
• +2.85V to +6.5V Single-Supply Operation
• Input Common-Mode Range Extends to V_EE
• Low Distortion at 5MHz
  • -88dBc SFDR
• High Output Current Drive: -106mA to +77mA
• 6ns Settling Time to 0.1%
• High-Speed Enable/Disable
  • 40ns Enable Time
  • 50ns Disable Time
  • High Output Impedance
• Space-Saving SOT23 and µMAX Packages

Applications/Uses

• CCD Imaging
• Communication Systems
• High-Speed ADC Drivers
• Instrumentation
• Ultrasound