Product category:
Analogue and Mixed Signal ICs
News Release from: Analog Devices | Subject: AD8352
Edited by the Electronicstalk Editorial
Team on 18 November 2005
Differential amplifier in drive for
basestations
The AD8352 is the first differential amplifier to achieve the ultralow distortion levels needed to efficiently drive the high-speed ADCs required by today's advanced wireless infrastructure systems.
Analog Devices is releasing the industry's first differential amplifier (diff amp) to achieve the ultralow distortion levels needed to efficiently drive the high-speed analogue-to-digital convertors (ADCs) required by today's advanced wireless infrastructure systems The latest addition to ADI's extensive portfolio of radio frequency (RF) components, the AD8352 is designed to drive 12 to 16bit ADCs at the highest practical intermediate frequencies (IF) used within next generation 3G and 4G cellular and broadband WiMAX wireless infrastructure equipment
This article was originally published on Electronicstalk on 2 Jul 2008 at 8.00am (UK)
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The AD8352 is capable of maintaining exceptional performance when driving high-speed ADCs up to 380MHz, far exceeding the 100MHz achieved by competing diff amps.
In today's demanding wireless applications, lowering the distortion level of the ADC driver is critical to improving system performance at higher frequencies, as this helps maintain the quality of the spurious free dynamic range (SFDR) and signal-to-noise-ratio (SNR) of the ADC.
This, in turn, minimises the number of intermediate frequencies within the radio design, thus reducing power consumption, cost, component count, and board area, and advances system-level performance in applications such as wireless basestations.
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"ADI believes it is important to design complementary solutions that match our world-class data convertors, ensuring the best system performance for the customer", said Peter Real, Product Line Director, RF and Networking Components, Analog Devices.
"For example, many third-generation basestation receiver designs lower the system cost and improve performance by using a high-speed ADC and a single-stage high-IF down-conversion".
"Pairing the ultra-low-distortion AD8352 with 12 and 14bit ADCs such as ADI's AD9445, AD9246 and AD9233, which all feature outstanding SFDR and SNR performance, means that basestation designers suffer no degradation in signal processing performance".
The ultralow distortion of the AD8352 at higher operating frequencies (82-dBc HD3 at 180MHz) is achieved by a proprietary internal cancellation scheme, and the use of XFCB-3, ADI's specialised silicon germanium (SiGe) silicon-on-insulator (SOI) process technology.
Along with ultralow distortion, the AD8352 delivers high linearity (41dBm OIP3), draws only 37mA of quiescent current, and is packaged in space saving 3 x 3mm LFCSP.
Unlike conventional differential amplifiers, the AD8352 saves considerable design time and adds flexibility by isolating the gain, allowing the user to select the desired gain with one external resistor.
The gain isolation permits the user to change the gain independent of noise and input matching requirements.
The AD8352 is ideally suited for use in single-ended to differential conversion, as a differential RF/IF gain block, and as an interface to differential devices such as SAW filters.
The AD8352 diff amp is sampling now with production quantities available in January 2006.
It is priced at $3.49 per unit in 1000-piece quantities.
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