The MAX2470/MAX2471 are flexible, low-cost, high- reverse-isolation buffer amplifiers for applications with discrete and module-based VCO designs. Both feature differential 50Ω outputs for driving a single differential (balanced) load or two separate single-ended (unbalanced) 50Ω loads. The MAX2470 offers a single-ended input and has two selectable frequency ranges of operation: 10MHz to 500MHz and 10MHz to 200MHz. The MAX2471 offers a differential input and operates from 10MHz to 500MHz. The MAX2470/MAX2471 also feature high input impedance for maximum flexibility, enabling them to be used with a variety of oscillator topologies. High reverse isolation combined with low supply current make them ideal for applications requiring high performance with low power. These devices are also ideal for use as active baluns. The MAX2470 converts a single-ended input to a differential output. The MAX2471 is useful as a differential buffer stage or to convert from a differential input to two single-ended outputs. The MAX2470 operates from a single +2.7V to +5.5V supply. At -5dBm output power, it consumes 5.5mA in the high-frequency range and only 3.6mA in the low-frequency range. The MAX2471 operates from a +2.7V to +5.5V single supply and consumes 5.5mA. Both devices are available in ultra-small SOT23-6 plastic packages.
The MAX2470 and MAX2471 are flexible, low‑cost buffer amplifiers designed for discrete and module‑based VCO designs. They provide high input impedance, differential 50 Ω outputs, and selectable frequency ranges from 10 MHz to 500 MHz (MAX2470 also offers 10 MHz‑200 MHz). Both devices operate from a single +2.7 V to +5.5 V supply and consume only a few milliamps of current.
These amplifiers are ideal for active balun applications, general‑purpose buffering, and driving multiple circuits simultaneously. The datasheet includes detailed electrical characteristics, pin descriptions, layout recommendations, and typical performance graphs to aid designers in integrating the parts into RF/microwave circuits.
| Supply Voltage Range | +2.7 V to +5.5 V |
|---|---|
| Input Frequency Range | 10 MHz to 500 MHz |
| Power Gain (200 MHz) | ≥14 dB |
| Reverse Isolation (200 MHz) | 64 dB |
| Supply Current (high‑freq) | 5.5 mA |
| Supply Current (low‑freq) | 3.6 mA |
| Package | SOT23‑6 |
| Transistor Count | 67 |
It operates from a single +2.7 V to +5.5 V supply.
The typical reverse isolation is 64 dB at 200 MHz.
Both devices are offered in an ultra‑small SOT23‑6 plastic package.
The devices provide a power gain of greater than 14 dB at 200 MHz.