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ADI embeds VCOs on GSM/GPRS transceiver chip

Posted: 13 Mar 2003 ?? ?Print Version ?Bookmark and Share

Keywords:analog devices? ad6539? ad6539l? gsm transceiver? gprs transceiver?

Analog Devices Inc. is again looking to bring higher levels of integration to the RF front-end of mobile phone designs with the release of a new member in its Othello transceiver family.

The AD6539 direct-conversion transceiver brings in the local oscillator VCO as well as the transmit VCO, both of which served as off-chip components in previous revisions of the transceiver.

The AD6539 has been optimized specifically for handsets supporting GPRS/GSM functionality. In addition to the integrated VCOs, the chip comes complete with four LNA inputs, power management circuitry, and a fractional-N PLL synthesizer.

The company said it would offer the chip in two versions. The first, dubbed the AD6539L is optimized to work specifically with Analog Devices X-PA family of power amps, which come equipped with integrated power detectors/controllers. The second version, the AD6539, includes a power control loop, making it a better solution for working with third-party power amps not delivering integrated power control circuitry.

The AD6539 and AD6539L are both sampling now, with production scheduled for mid-2003. Pricing for both products is less than $5 in 10,000-unit quantities.

- Robert Keenan

EE Times





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