The MAX2055 is a high-performance, digitally controlled, variable-gain, differential analog-to-digital converter (ADC) driver/amplifier (DVGA) designed for use from 30MHz to 300MHz in base station receivers. It integrates a digitally controlled attenuator and a high-linearity single-ended-to-differential output amplifier, which can either eliminate an external transformer or improve the even-order distortion performance of a transformer-coupled circuit, thus relaxing the requirements of the anti-alias filter preceding an ADC. The MAX2055 is targeted for ADC driver applications to adjust gain either dynamically or as a one-time channel gain setting, and is ideal for applications requiring high performance.
The MAX2055 is a digitally‑controlled, variable‑gain, differential ADC driver/amplifier designed for use from 30 MHz to 300 MHz in base‑station receivers and other high‑performance RF applications. It integrates a digital attenuator with a 23 dB range and a high‑linearity single‑ended‑to‑differential output amplifier.
The device is supplied in a 20‑pin TSSOP‑EP package, operates from –40 °C to +85 °C, and requires a supply voltage of 4.75 V to 5.25 V. Detailed electrical characteristics, pin descriptions, layout guidelines, and typical application circuits are provided.
| Frequency Range | 30 MHz – 300 MHz |
|---|---|
| Variable Gain Range | -3 dB to +20 dB |
| Attenuation Range | 23 dB (±0.2 dB accuracy) |
| Noise Figure (max gain) | 5.8 dB |
| Output IP3 (all gain states, 70 MHz) | 40 dBm |
| Supply Voltage (VCC) | 4.75 V – 5.25 V |
| Supply Current (I CC) | Typical 290 mA |
| Package | 20‑pin TSSOP‑EP |
| Operating Temperature | -40 °C to +85 °C |
The MAX2055 provides a 23 dB attenuation range with ±0.2 dB accuracy.
It operates from a supply voltage of 4.75 V to 5.25 V.
The device works from 30 MHz up to 300 MHz.
Typical supply current is about 290 mA.