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RF detector offers exceptional performance in 2-by-2mm package

Posted: 03 Sep 2004 ?? ?Print Version ?Bookmark and Share

Keywords:linear technology? rf detector? lt5534?

Linear Technology Corp. unveiled a new high performance logarithmic type RF detector that can accurately detect RF signals up to 3GHz.

According to the company, the LT5534 has exceptional temperature stability and a log-linear transfer characteristic with a total dynamic range of 60dB. Its output is directly proportional to the logarithm of the average RF voltage input.

At 900MHz, the device provides repeatable measurement of RF power within 1dB over a typical 50dB dynamic range, while spanning the temperature range of -40C to 85C. It has excellent sensitivity, detecting signals as small as -63dBm, added Linear Tech.

The LT5534 operates over a wide RF input frequency range, from 50MHz to 3GHz. Additionally, its output buffer has a 30MHz bandwidth that can track fast RF signal level transitions. It is capable of detecting full-scale RF changes with 38ns delay. And internally, the chip contains temperature compensation circuitry that provides stable and accurate measurements over the full extreme temperature range.

The new RF detector operates from a single 2.7V to 5.25V supply, drawing a typical quiescent current of 7mA. Target applications include cellular basestation receivers and transmitters, subscriber radios, instrumentation applications and other high performance transceivers, enabling accurate RF power control and RSSI measurement.

The recently-released press statement said that the LT5534 the first product offering this level of performance in a 6 lead 2-by-2mm surface mount SC-70 package. For 1,000-piece orders, the device is priced at $4.50.

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