General Description
The MAX2651/MAX2652/MAX2653 silicon germanium (SiGe), low-noise amplifiers (LNAs) are intended for use in GSM900, DCS1800, and PCS1900 band wireless handsets. The MAX2651/MAX2652 consist of two LNAs, one optimized for the GSM900 band and the other optimized for the DCS1800/PCS1900 bands. They feature a band-select pin to switch between the two LNAs, as well as a gain-step input to reduce the gain of each LNA by 20dB and reduce supply current. The MAX2652 is functionally equivalent to the MAX2651, but features a low power shutdown mode. The MAX2653 consists of a single LNA optimized for the DCS1800 and PCS1900 bands, and has a shutdown feature and a 20dB gain step.

Features
♦ Wide Operating Frequency Range
    800MHz to 1000MHz (MAX2651/52)
    1800MHz to 2000MHz (MAX2651/52/53)
♦ Excellent Low-Noise Performance
    1.2dB/1.3dB over GSM Receive Band (MAX2651/52)
    1.8dB/1.8dB/1.7dB over DCS Receive Band (MAX2651/52/53)
♦ High Gain
    18dB over GSM Receive Band (MAX2651/52)
    18dB/17.5dB/18.5dB over DCS Receive Band (MAX2651/52/53)
♦ 20dB Gain Reduction in Low-Gain Mode
♦ Externally Adjustable Gain
♦ +2.7V to +3.3V Single-Supply Operation
♦ Low Supply Current
    5.4mA to 7.0mA in High-Gain Mode
    2.2mA in Low-Gain Mode
♦ 0.25µA Shutdown Current (MAX2652/53)

Applications
    GSM900/DCS1800 Dual-Band Phones
    GSM900/DCS1800/PCS1900 Triple-Band Phones
    DCS1800 or PCS1900 Single-Mode Phones
    IS-136 TDMA Dual-Band Phones