Linear Technology Corp. (LTC, Milpitas, CA) introduced the LTC5532, a precision RF power detector designed for monitoring and control applications in wireless communication transceivers. The LTC5532 is an integrated device that is factory trimmed to accurately measure RF signals from 300MHz to 7GHz, suitable for equipment, including the 802.11a, 802.11b, and 802.11g WiFi systems; 5.8GHz WAN and WLAN radios; and other licensed band transceivers.
Its RF input signal range extends from -32dBm to +8dBm. The LTC5532 has an on-chip temperature compensated Schottky diode for RF detection. It employs a peak-detection architecture, providing a stable DC output voltage as a function of the RF input power. The LTC5532 can be powered from a single 2.7V to 6V supply. It draws only 500µA of current, and is suitable for battery-operated portable applications.
The LT5532 is offered in a six-lead ThinSOT-23 package, consuming a small PC board space. Pricing starts at $2 each in 1,000-piece quantities.