Wide bandwidth dual 14bit ADC

Catering to high-end data conversion applications such as defense imaging systems or wideband test and measurement equipment, Texas Instruments (TI) has introduced the first in a series of four 12- and 14bit dual channel analog-to-digital converters (ADCs) with sample rates of 210 and 250MS/s (mega samples per second). The ADS62P49 is a 14bit ADC that TI claims is 'the industry's fastest' with a sampling rate of 250MS/s (mega samples per second). This sampling rate, combined with low power operation at 625mW per channel, is said to facilitate multi-channel, wide-bandwidth measurements with high accuracy.

Explained Art George, senior vice president of TI's High-Performance Analog business unit: “Communications, defense and test design engineers are constantly challenged to create signal and data acquisition receivers with increasingly wide signal bandwidths that do not compromise overall system performance. TI addresses these challenges with the ADS62P49 which delivers high-performance, compact,
power-efficient designs and enables rapid deployment of 3G and 4G systems, software defined radios and spectrum analysers.”'

Among the ADS62P49's key attributes are a claimed 73dBFS signal-to-noise ratio (SNR) and 85dBc spurious-free dynamic range (SFDR) at an input frequency of 60MHz. This ADC boasts programmable gain and various user-selectable settings, allowing designers to maximise SNR to enhance linearisation effectiveness in digital pre-distortion (DPD) solutions, and increase SFDR and reduce input drive to improve small-signal analysis in defense and radio receiver applications

The ADS62P49 comes in a 9 x 9mm QFN package and is, along with other members of this product family, pin-compatible with the dual-channel ADS6000 family. Potential users can evaluate it using the ADS62P49EVM evaluation module, which has on-board sockets for a voltage-controlled crystal oscillator, crystal filter and TI's CDCE72010 clock distribution and jitter cleaning chip.

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