Product category:
Analogue and Mixed Signal ICs
News Release from: Analog Devices | Subject: AD7610, AD7612, AD7631 and AD7634
Edited by the Electronicstalk Editorial
Team on 12 October 2005
A/D convertors save with flexible inputs
A new generation of 16 and 18bit ADCs address industrial needs for more efficient and cost-effective data conversion, while reducing design complexity and setting new standards for performance.
Analog Devices today introduced a new generation of 16 and 18bit Pulsar analogue-to-digital convertors (ADCs) that address the industrial customer's need for more efficient and cost-effective data conversion, while reducing design complexity and setting new standards for performance SAR (successive-approximation register) convertors comprise the majority of the ADC market and are often the most cost-effective technology for applications that require very precise digital modelling of analogue signals, such as data acquisition and process control systems used in factory automation
This article was originally published on Electronicstalk on 2 Jul 2008 at 8.00am (UK)
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Featuring software selectable analogue input ranges across multiple selections of unipolar and bipolar ranges, the new ADCs eliminate the need for expensive level shifting and gain stages in front-end analogue circuitry, resulting in a dramatic reduction in component costs and board space requirements.
Using the ADCs' internal registers, designers have the flexibility of switching from four different input voltage ranges "on the fly" - with zero data latency.
Clocking at speeds up to 750Ksample/s, devices in the 16bit AD761x series offer up to a 6x improvement in sampling rate performance over existing programmable ADCs, and the AD763x ADCs allow more precise signal conversion at 18bit resolution.
Further reading
Front-end IC cleans up transmitter designs
The ADF9010 integrates a high-performance transmitter quadrature modulator with an integer-N synthesiser and on-chip low-phase-noise voltage-controlled oscillator.
Demodulator and amp cut receiver complexity
Combined two-chip solution can reduce the active component count by 60% within a radio design, providing considerable board area and bill of material savings.
Microcontrollers integrate 24bit convertors
With on-chip 24bit sigma-delta ADCs, the ADuC706x provides the resolution required by today's high-performance industrial and instrumentation equipment.
The combination of functionality, performance and a 50% smaller footprint available at half the price of competing products is unprecedented in a SAR ADC.
Data acquisition systems have traditionally relied on level-shifting and gain stages to accommodate various bipolar and unipolar analogue input ranges that are required by OEM customers.
This front-end signal conditioning method includes "boot-strapping" or register-controlled programming, which is a time consuming and costly approach.
By leveraging ADI's patented iCMOS industrial process technology, the new AD761x and AD763x Pulsar ADCs allow for the selection of unipolar input voltage ranges of 0 to 5 and 0 to 10V, and bipolar input voltage ranges of +/-5 and +/-10V.
"In data conversion, innovating for greater efficiency can be just as important as performance, and the new ADCs deliver greater value to our customers by innovating where it means the most for designers of industrial applications", said Mike Britchfield, Product Line Director, Precision Signal Processing Group, Analog Devices.
"The devices were designed to address the challenges of industrial electrical environments where efficiency, size and cost are critical factors, while also passing along a lower cost of ownership".
The AD761x and AD763x join Analog Devices' industry leading Pulsar family of SAR convertors, an ADC architecture that provides the added advantage of zero data latency, a critical factor in data acquisition systems.
The AD761x series provide fast sampling rates at 250 to 750Ksample/s combined with the high accuracy of 2.0LSB typical integral nonlinearity (INL).
With 18bit accuracy, the AD763x series offers the highest precision in a software programmable ADC, with sampling rates of 250 to 670Ksample/s and 2.5LSB typical INL.
The devices have very low power consumption featuring 75mW at 500Ksample/s.
Both the AD761x and AD763x integrate a complete range of analogue functions on-chip, including an internal 2.5V reference, an internal conversion clock, error correction circuits, and both serial and parallel interfaces.
The ADCs are pin-compatible with other parts within their respective series.
The 16bit AD761x Pulsar ADCs can be coupled with ADI's new ADR12x low power voltage references, which offer the highest accuracy over the extended industrial temperature range of -40 to +125C, within a tiny TSOT-23 package.
Both the new 16bit Pulsar ADC series (AD7610 and AD7612) and the 18bit Pulsar ADC series (AD7631 and AD7634) are sampling now, with full production slated for December 2005.
The 16bit devices are available at prices starting at $12.90 per unit for the AD7610; and the 18bit devices are available at prices starting at $25.10 per unit for the AD7631, in 1000-piece quantities.
Both series of devices are available in 48-lead LQFP (leaded quad flat pack) and 48-lead LFCSP (lead frame chip-scale package) packaging.
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