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Intersil’s new ADCs target applications in power amplifier linearisation, radar and satellite antenna array processing, broadband communications, data acquisition and communication test equipment.

The analogue-to-digital converters offer pin-compatible 12-, 14- and 16-bit ADCs with sample rates from 130 to 500 megasamples per second (MSPS).

The first device to be introduced is the ISLA214P50, a 14-bit, 500MSPS ADC that consumes 63 per cent less power while sampling at a rate 25 per cent higher than any other 14-bit ADC, according to the company.

The ISLA214P50 was designed using Intersil’s Femtocharge technology and operates from a 1.8V power supply.

The new converter’s ultra-high sample rate and resolution improve sensitivity and accuracy, while the decrease in power consumption allows simplified thermal and power system design.

At a sample rate of 500MSPS, the ISLA214P50 features a signal-to-noise ratio (SNR) of 72.7dBFS with spurious free dynamic range (SFDR) of 84dBc for fIN = 30MHz (-1dBFS).

The ISLA214P50 was recently selected by Spectrum Signal Processing By Vecima, a provider of software-reconfigurable signal-processing platforms, for use in its RF-4902 Wideband Frequency-Agile RF Transceiver.

Because the ISLA214P50 consumes only 835mW of power, it can be used in systems that cannot tolerate bulky heat sinks and fans.

A serial peripheral interface (SPI) port provides access to the ADC’s feature set, such as power-management functions, output test pattern generation and output code format selection.

Digital output data is presented in selectable LVDS or CMOS modes.

The ISLA214P50 uses two time-interleaved 250MSPS ADCs to achieve the resulting 500MSPS sampling rate.

A single 500MHz conversion clock is presented to the converter and all interleave clocking and correction is managed internally.

The proprietary Intersil interleave engine optimises performance using automatic fine correction of offset, gain and sample time mismatches between the unit ADCs.

The combination of Femtocharge and I2E technology results in a power-efficient architecture for achieving high sample rates without sacrificing dynamic performance.

Other members of the range will include single and dual 12-, 14-bit and 16-bit ADCs, offering high dynamic performance and ultra-low power consumption.

All single-channel devices have been designed to be pin-compatible to facilitate design reuse.

Similarly, all dual-channel devices are pin-compatible.

All devices will be available in space-efficient 10 x 10mm, 72-pin QFN packages.

For area-constrained PCBs, a subset will be offered in a 7 x 7mm, 48-pin QFN package, reducing the already small footprint by an additional 51 per cent.

All models include the ability to synchronise multiple ADCs, which, when combined with low power consumption and small physical size, make them suitable for multi-channel, highly parallel systems.

Intersil is also making available a flexible evaluation system, developed to enable designers to analyse performance in both time and frequency domains.

The system features a modular design with one motherboard that supports multiple ADC ranges.

Matlab code is available for hardware-in-the-loop analysis and can capture greater than 1 Megasample in a single, contiguous stream.

Users can download captured data to standard CSV files to apply specialised post processing.

The ISLA214P50 is available in a 72-pin QFN package with an exposed paddle.

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