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General Description

The MAX2057 general-purpose, high-performance variable-gain amplifier (VGA) is designed to operate in the 1700MHz to 2500MHz frequency range*. This device 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. In addition, the on-chip analog attenuators yield infinite control and high attenuation accuracy over selectable 21dB or 42dB control ranges. Each of these features makes the MAX2057 an ideal VGA for DCS/PCS, cdma2000?, W-CDMA, and PHS/PAS transmitter and power amplifier AGC circuits.

Features

? 1700MHz to 2500MHz RF Frequency Range*

? 37dBm Constant OIP3 (Over All Gain Settings)

? 23.8dBm Output 1dB Compression Point

? 15.5dB Typical Gain at Maximum Gain Setting

? 0.5dB Gain Flatness Over 100MHz Bandwidth

? 6dB Noise Figure at Maximum Gain Setting (Using 1 Attenuator)

? Two Gain-Control Ranges: 21dB and 42dB

? Analog Gain Control

? Single +5V Supply Voltage

? Pin Compatible with MAX2056, 800MHz to 1000MHz RF VGA

? External Current-Setting Resistors Provide Option for Operating VGA in Reduced-Power/ReducedPerformance Mode

? Lead-Free Package Available

Applications

??? DCS 1800/PCS 1900 2G and 2.5G EDGE Base-Station Transmitters and Power Amplifiers

??? cdmaOne?, cdma2000, Base-Station Transmitters and Power Amplifiers

??? UMTS/W-CDMA and Other 3G Base-Station Transmitters and Power Amplifiers

??? PHS/PAS Base-Station Transmitters and Power Amplifiers

??? Transmitter Gain Control

??? Receiver Gain Control

??? Broadband Systems

??? Automatic Test Equipment

??? Digital and Spread-Spectrum Communication Systems

??? Microwave Terrestrial Links