Device Combines 4MSPS Sampling, 12-Bit Resolution and Only 95mW Power
October 9, 2003 - Texas Instruments (TI) Incorporated unveiled the first successive approximation (SAR) analog-to-digital converter (ADC) at any resolution to achieve four mega samples per second (MSPS). 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 analyzers, imaging and telecommunications. (See'dataconverter.ti.com/sc03220).
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 (0V to 2.5V) common to many high speed ADCs. It offers a 12-bit 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.
Pin-Compatible Portfolio for Easy Upgrade and other Companion Devices
All members of TI's high-speed 12-bit, 16-bit and 18-bit SAR ADC family are offered in pin-compatible packages, providing designers with comprehensive upgrade options from 1.25MSPS to 4MSPS and from 12-bit to 18-bit resolution.'
The ADS7881 is optimized to work with TI's high-performance amplifiers (THS4031 and THS4211) to achieve highest performance designs.Available Today
The ADS7881 comes in a 48-lead TQFP package, and is available now from TI and its authorized distributors. The device is priced at $7.00 in 1,000 piece quantities (suggested resale pricing). Evaluation modules (EVMs) are also available.
