Product category: Analogue and Mixed Signal ICs
News Release from: Texas Instruments (April 2001-March 2006) | Subject: ADS7881
Edited by the Electronicstalk Editorial Team on 15 October 2003
ADC claims speed record
The ADS7881 is the first successive approximation analogue-to-digital convertor at any resolution to achieve 4Msample/s
The ADS7881 is the first successive approximation (SAR) analogue-to-digital convertor (ADC) at any resolution to achieve 4Msample/s. Designed from the company's Burr-Brown product line, the device is ideal for advanced applications requiring high speed and low power, such as optical networking, portable medical systems, high-speed data acquisition, spectrum analysers, imaging and telecommunications.
This article was originally published on Electronicstalk on 15 October 2003 at 8.00am (UK)
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'Utilising our leading-edge data convertor technology, TI has developed yet another ADC with speed and performance attributes that cannot be equalled in the market', said Tony Chang, Strategic Marketing Engineer for TI's data acquisition products.
'The ADS7881 gives customers an unparalleled solution by combining 1-bit no missing codes at 4MHz sampling rate, 1LSB linearity, 1.5mV offset, -91dB harmonic distortion, 71.5dB signal-to-noise and only 95mW power dissipation.
This is the only device available that can address high-speed data acquisition needs by providing specification with an input signal frequency as high as 1.8MHz'.
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The SAR-based architecture, in contrast to high-speed pipeline and delta-sigma architectures, has the advantage of no latency conversion, which is ideal for multiplexed or servo-control applications.
Additionally, the DC performance of these devices, especially offset and offset drift, is far superior to other high-speed ADCs currently available.
The ADS7881 offers designers a complete solution by integrating an internal reference and reference buffer.
The device has a pseudo-differential, unipolar input range (0 to 2.5V) common to many high speed ADCs.
It offers a 12bit interface with an additional byte mode that provides easy interface with 8-bit processors.
A nap mode reduces power dissipation to 10mW and a power down mode consumes only 10uW.
All members of TI's high-speed 12, 16 and 18bit SAR ADC family are offered in pin-compatible packages, providing designers with comprehensive upgrade options from 1.25 to 4Msample/s and from 12 to 18bit resolution.
The ADS7881 is optimised to work with TI's high-performance amplifiers (THS4031 and THS4211) to achieve highest performance designs.
The ADS7881 comes in a 48-lead TQFP package, and is available now from TI and its authorised distributors.
The device is priced at $7.00 in 1000-piece quantities (suggested resale pricing).
Evaluation modules are also available.
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