330MHz, Gain of +1/Gain of +2 Closed-Loop Buffers

Part Number	Status	Replacement	Explanation
MAX4178	This product is No Longer Available. See Ordering Information for recommended replacements.	MAX4200 MAX4201 MAX4202 MAX4203 MAX4204 MAX4205	Ultra-high speed, low-noise, and low-power buffers in SOT23.
MAX4278	This product is No Longer Available. See Ordering Information for recommended replacements.	MAX4200 MAX4201 MAX4202 MAX4203 MAX4204 MAX4205	Ultra-high speed, low-noise, and low-power buffers in SOT23.

The MAX4178/MAX4278 are ±5V, wide-bandwidth, fast-settling, closed-loop buffers featuring high slew rate, high precision, high output current, low noise, and low differential gain and phase errors. The MAX4178, with a -3dB bandwidth of 330MHz, is preset for unity voltage gain (0dB). The MAX4278 is preset for a voltage gain of +2 (6dB) and has a 310MHz -3dB bandwidth.

The MAX4178/MAX4278 feature the high slew rate and low power that are characteristic of current-mode feedback amplifiers. However, unlike conventional current-mode feedback amplifiers, these devices have a unique input stage that combines the benefits of current-feedback topology with those of the traditional voltage-feedback topology. This combination results in low input offset voltage and bias current, low noise, and high gain precision and power-supply rejection.

The MAX4178/MAX4278 are ideally suited for driving 50Ω or 75Ω> loads. They are the perfect choice for high-speed cable-driving applications, such as video routing. The MAX4178/MAX4278 are available in DIP, SO, space-saving µMAX®, and SOT23 packages.

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