The LTC5532 is a precision RF power detector designed for monitoring and control applications in wireless communication transceivers. It is an integrated device that is factory trimmed to accurately measure RF signals from 300 MHz to 7 GHz, which is suitable for equipment including the 802.11a, b, and g WiFi systems, 5.8-GHz WAN and WLAN radios, and other licensed band transceivers. Its RF input signal range extends from –32 to 8 dBm. The LTC5532 has an on-chip temperature-compensated Schottky diode for RF detection. It employs peak-detection architecture, providing a stable DC output voltage as a function of the RF input power.

Unique to the LTC5532 are adjustable offset and gain, increasing design flexibility. The starting output voltage can be user-adjusted. The gain slope can be set by using two external resistors to match any A/D converter for improved measurement accuracy and resolution. The two adjustments are mutually independent. Additionally, the gain-adjustable amplifier can be configured as a threshold comparator for applications such as RF presence detectors and RF power alarms.

The device can be powered from a single 2.7- to 6-V supply. It draws only 500 µA, and is suitable for battery-operated portable applications.

The LT5532 is offered in a tiny six-lead ThinSOT-23 package. Pricing starts at $2 each in 1000-piece quantities.

Linear Technology Corp.
(800) 454-6327
www.linear.com