DPD demodulators deliver over 1W of power savings

22nd January 2014

IDT

Staff Reporter

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Improving system performance and lowering cost, the IDTF1320 and IDTF1370 DPD demodulators signal an expansion of IDT's RF signal chain portfolio. Optimised for 400 MHz to 1200 MHz and 1300 MHz to 2900 MHz wireless systems, the demodulators reduce physical size and power consumption in 4G, 3G, and 2G wireless base stations and repeaters.

The devices include a demodulator, digital step attenuator and high-isolation single-pole double-throw switch to minimize system solution cost, board footprint, and bill-of-materials. Offering over 1W of power savings, compared to conventional systems, results in reduced heat dissipation and energy usage, promotion of smaller equipment form factors, lower operating costs and helps ease cooling requirements. Further to this, the DPD ICs provide excellent linearity and high bandwidth, making them suitable for linearizing any type of BTS transmitter.

The high-isolation SP2T switch, incoporated in the DPD ICs, allows easy integration into MIMO systems. Further to this, the integrated Glitch-Free DSA enables dynamic adjustment to optimize the power of the incident signal reaching the demodulator. The Zero-Distortion demodulator is able to drive the ADCs directly, eliminating the need for IF VGAs in most applications.

The dynamic range of the IDTF1320 and IDTF1370 results in enhanced DPD loop performance, minimizing the ACLR and EVM. This promotes better system-wide transmitter performance and enables wireless service providers to deliver higher-bandwidth internet and data services over existing frequency bands

“IDT’s new DPD demodulator offers customers tremendous benefits in performance and integration,” commented Christian Kermarrec, vice president and general manager at IDT. “Innovative design techniques have allowed us to integrate important functions into a single chip, producing a highly-compact, low-power solution with exceptional linearity and high bandwidth. This enables our customers to reduce solution cost, simplify the PCB, and minimize heat dissipation – critical factors in next-generation wireless base station equipment designs. These devices complement our rich portfolio of radio card products, including RF mixers, variable gain amplifiers, digital step attenuators, data converters, and high-performance timing ICs.”

The devices are available now to qualified customers in a compact, 6x6 mm 36-ld VFQFPN package.