The MAX4285/MAX4286/MAX4287/MAX4288/MAX4387/MAX4388 is a high-performance ADC buffer amplifier operating from a single +3V supply. The device offers 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 instrumenta- tion applications.
The MAX4285‑MAX4286 single‑channel and MAX4287‑MAX4288/ MAX4387‑MAX4388 dual‑channel ADC buffer amplifiers deliver high‑speed performance with a single‑supply operation at +3 V. They include a high‑speed enable/disable function that reduces supply current and presents a high‑impedance output when disabled, making them suitable for multiplexing applications.
Key specifications include a 250 MHz (‑3 dB) bandwidth for most devices, a 350 V/µs slew rate, up to 100 mA output drive, 8 ns (0.1 %) settling time, and 88 dBc SFDR at 5 MHz. The devices operate from +2.85 V to +6.5 V single‑supply or ±1.425 V to ±3.25 V dual‑supply and are offered in compact SOT‑23, µMAX and SO packages.
| Supply Voltage Range (single‑supply) | +2.85 V to +6.5 V |
|---|---|
| Supply Voltage Range (dual‑supply) | ±1.425 V to ±3.25 V |
| Bandwidth (‑3 dB) | 250 MHz (MAX4285/4287/4288) / 150 MHz (MAX4286/4387/4388) |
| Slew Rate | 350 V/µs |
| Output Drive Current | up to 100 mA |
| Settling Time (0.1 %) | 8 ns |
| Enable Time | 40 ns |
| Disable Time | 50 ns |
| Quiescent Supply Current (per amplifier) | 20 mA |
They operate from +2.85 V to +6.5 V with a single supply or from ±1.425 V to ±3.25 V with dual supplies.
The typical settling time to 0.1 % is 8 ns.
They can provide up to 100 mA of output drive current.
The enable time is 40 ns and the disable time is 50 ns.