The MAX2057 is a general-purpose, high-performance variable-gain amplifier (VGA) designed to operate in the 1700MHz to 2500MHz frequency range. It features 15.5dB of gain, 6dB of noise figure, and an output 1dB compression point of 23.8dBm. The MAX2057 also provides an exceptionally high OIP3 level of 37dBm, which is maintained over the entire attenuation range. The on-chip analog attenuators yield infinite control and high attenuation accuracy over selectable 21dB or 42dB control ranges. These features make the MAX2057 an ideal VGA for DCS/PCS, cdma2000, W-CDMA, and PHS/PAS transmitter and power amplifier AGC circuits. It is pin compatible with the MAX2056 800MHz to 1000MHz VGA, making it suitable for applications where a common PC board layout is used for both frequency bands. The MAX2057 operates from a single +5V supply and is available in a compact 36-pin thin QFN package (6mm x 6mm x 0.8mm) with an exposed paddle. Electrical performance is guaranteed over the extended -40°C to +85°C temperature range.
The MAX2057 is a high‑performance variable‑gain amplifier (VGA) designed for the 1700 MHz to 2500 MHz frequency range. It operates from a single +5 V supply in a compact 36‑pin thin QFN‑EP package and is pin‑compatible with the MAX2056.
Key features include selectable 21 dB or 42 dB gain‑control ranges, analog gain control via the VCNTL pin, low noise figure, high output compression point, and robust thermal and RF grounding through an exposed paddle. The datasheet provides absolute maximum ratings, DC and AC electrical characteristics, typical operating curves, layout recommendations, and pin configuration details.
| Frequency Range | 1700 MHz – 2500 MHz |
|---|---|
| Typical Gain (max setting) | 15.5 dB |
| Noise Figure (max gain) | 6 dB |
| Output 1 dB Compression Point | 23.8 dBm |
| Output 3rd‑Order Intercept (OIP3) | 37 dBm |
| Supply Voltage | 4.75 V – 5.25 V |
| Gain‑Control Voltage Range | 1.0 V – 4.5 V |
| Gain‑Control Ranges | 21 dB or 42 dB |
| Attenuator Insertion Loss (single attenuator) | ≈2.2 dB |
| Attenuator Switching Time | 500 ns |
The MAX2057 operates from 1700 MHz to 2500 MHz.
It requires a supply voltage between 4.75 V and 5.25 V.
The typical gain at maximum setting is 15.5 dB.
The noise figure is 6 dB at maximum gain.