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MxFEs cut basestation power, space

Posted: 24 Aug 2010 ?? ?Print Version ?Bookmark and Share

Keywords:mixed-signal front-ends? MxFEs? wireless infrastructure?

Analog Devices Inc. launches two new mixed-signal front-ends (MxFEs) that reduce power and board space for developers of wireless infrastructure and portable radio equipment. The 12-bit AD9963 and 10-bit AD9961 MxFEs use 40 percent less power and 25 percent less PCB space than competing devices without sacrificing performance. They are suited for cost-sensitive wireless equipment, such as femtocell and picocell basestations that need highly integrated dual transmit-and-receive functions.

The 12-bit AD9963 and 10-bit AD9961 are pin-compatible, low-power MxFEs that each integrate two ADC channels with sample rates to 100MSps and two DAC channels with sample rates to 170MSps. They enable up to 10dB better adjacent-channel leakage ratio performance than competing devices, easing design and filtering requirements while consuming less power.

Also integrated onto the devices are digital interfaces with flexible clocking options. They have five auxiliary analog channels consisting of two 12-bit DACs, two 10-bit DACs and a 12-bit ADC. The ADC may be used to measure and monitor multiple points, both internal and external. The transmit path is configurable for 1x, 2x, 4x and 8x interpolation, and the receive path includes a by-passable 2x decimating low-pass filter. The AD9963 also integrates auxiliary low dropout voltage regulators that allow the device to be powered from a single-supply and further reduce external component count.

Other key features include SNR of 66.5 dB; adjacent-channel leakage ratio of 72dBc; power consumption of 425mW at maximum sample rates; transmit path power consumption The highly integrated MxFEs can be coupled with ADI's ADF4602 3G multi-band transceiver, ADL5501 RMS power detector as well as RF amplifiers, such as the ADL5320, ADL5542 and ADL5601 products to create a complete femtocell radio.

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