Date: 03/05/2009

New low power ADCs from Analog Devices for high performance applications

Analog Devices has launched 18 new Analog to Digital Converter (ADCs) ICs with bit-resolution in the range of 10-16 for portable electronics equipments used in the field of medical electronics, instrumentation, and industrial equipments.

Analog Devices says, these new ADCs reduce power consumption by as much as 60 percent compared to many competing ADCs, while maintaining best-in-class noise performance and dynamic range.

"There is a growing trend to reduce total system power with each generation, and in the past, the system designer was left with making power-versus-performance tradeoffs, especially with high speed converters," said Jon Hall, strategic marketing and applications manager, High Speed Signal Processing, Analog Devices. "Power efficiency is a requirement across a broad range of applications, and so is hitting the target system performance. ADI's 18 newest ADCs provide low power without sacrificing the high degree of performance the industry has come to expect from ADI."

The 125-MSPS 16-bit, dual-channel ADC AD9268 consumes 376 mW per channel and is also available in speed grades of 80, and 105 MSPS with pin compatibility. The 125-MSPS ADC achieves 78 dB SNR (signal-to-noise ratio) and 90 dB SFDR (spurious-free dynamic range) to 70 MHz analog input frequency, while consuming 376mW per channel.
Available in a Pb-Free, 9 mm x 9 mm chip-scale package, the AD9268 is pin-compatible with ADI's other low-power ADCs. This speeds product upgrades, simplifies new-product engineering debug, and improves time-to-market by reducing the number of separate ADC pin-outs that manufacturers must support.

Another converter in the series, the AD9251 is a dual-channel 14-bit ADC and is available in the same 64-lead LFCSP pin-compatible footprint and is offered in speed grades of 20, 40, 65, and 80 MSPS. With 73.5 dB SNR and 85 dB SFDR to 70 MHz analog input frequency, the AD9251 dissipates only 86 mW per channel at 80MSPS, improving power efficiency by more than 50 percent over competing 14-bit ADCs.

All of ADI's new low-power dual ADCs operate from a single 1.8-V analog power supply and feature a sample-and-hold circuit and on-chip voltage reference. The AD9251 family offers a separate driver supply to accommodate 1.8-V or 3.3-V CMOS logic outputs, while the AD9268 family offers 1.8-V LVDS or CMOS outputs. The ADC cores use a multi-stage, differential pipelined architecture with integrated output error-correction logic. The ADCs also features programmable clock and data alignment and programmable digital test-pattern generation. The available digital test patterns include built-in, deterministic and pseudo-random patterns, and definable test patterns that users can enter via the serial port interface (SPI).

All these ADCs are available in samples in the price beginning from $5 each.

For further details visit http://www.analog.com