Maxim Integrated Products Inc. (Sunnyvale, CA) unveiled its new MAX4003 power amplifier detector, which accepts an input power from -45dBm to 0dBm and operates in the 100MHz to 2.5GHz frequency range covering the GSM/GPRS, CDMA and TDMA frequency bands. Available in an eight-bump CSP with a 1.6mm x 1.6mm footprint and in an eight-pin microMAX package, the logarithmic amplifier is claimed to provide a wide measurement range and a better accuracy for PA detection applications compared with diode-based detector methods.
The MAX4003 output stage delivers a logarithmic slope of 25.5mV/dB over a 45dB input range, providing a wide dynamic range for the analog-to-digital converter within the baseband chipset, and supporting the biasing requirements of a wide array of power amplifier modules. The MAX4003 has a low-power shutdown mode that reduces power consumption to 13µA.
