MAX2203: Industry's most accurate RMS power detector, regardless of modulation

Using Maxim's expertise with the SiGe BiCMOS process and wafer-level packaging technology, the MAX2203 offers a repeatable and exceptionally accurate RMS output over temperature and modulation. This future-proof performance means that the MAX2203 is modulation independent. A circuit can now be reused with no additional engineering effort in new end-equipment designs that add modulation schemes.

The output voltage and input power is linear in dB. The device has a -25dBm to +3dBm detection range, and every dB change in input power gives 40mV typical change in output voltage. Boasting 0.1dB typical RMS accuracy from WCDMA modulation change and ±0.5dB detection error due to temperature, the MAX2203 improves closed-loop performance of the transmit path in today's multiband, multimode smartphones, cellular phones, broadband laptop data cards. It can also be used for SAR limiting.

The MAX2203EWT+T operates from a 2.5V to 4.2V supply. Fully specified over the -40 degrees Celsius to +85 degrees Celsius extended temperature range, it is available in an ultra-small, 6-pin WLP. Prices start at $0.50 (1000-up, FOB USA).