The MAX2472/MAX2473 are flexible, wideband, high-reverse-isolation buffer amplifiers. The MAX2472 has dual open-collector outputs capable of delivering -5dBm into 50Ω while maintaining harmonic suppression below -25dBc. The MAX2473 has a single open-collector output with a bias control pin to vary output power from -10dBm to -2dBm while maintaining harmonic suppression below -25dBc. The combination of high reverse isolation and low supply current makes the MAX2472/MAX2473 ideal for applications requiring high performance with low power. They feature high input impedance and open-col- lector outputs for maximum flexibility, enabling them to be used with a variety of oscillator topologies. Both the MAX2472 and MAX2473 operate from a single +2.7V to +5.5V supply. With VCC = +3.0V and -25dBm input power, the MAX2472 consumes 5.2mA, while the MAX2473 consumes only 2.7mA. Both devices are avail- able in a tiny 6-pin SOT23 package requiring minimal board space. Applications include Cellular and PCS Mobile Phones, Private Mobile Radios, ISM-Band Applications, IF/RF Oscillators, and General-Purpose Buffers/Amplifiers. Typical Operating Circuits appear at end of data sheet.
The MAX2472 and MAX2473 are flexible, wideband buffer amplifiers designed for VCO applications. They operate from a single +2.7 V to +5.5 V supply, cover 500 MHz to 2500 MHz input frequencies, and provide high reverse isolation (49 dB at 900 MHz) with harmonic suppression below –25 dBc. The MAX2472 offers dual open‑collector outputs delivering –5 dBm, while the MAX2473 features a single output with bias control for –10 dBm to –2 dBm output power.
Typical applications include cellular and PCS mobile phones, private mobile radios, ISM‑band devices, IF/RF oscillators, and general‑purpose buffering. The devices are supplied in a tiny 6‑pin SOT23‑6 package, consume low supply current (5.2 mA for MAX2472, 2.7 mA for MAX2473), and include recommendations for input and output matching, layout, and power‑supply bypassing.