TI introduces 16-bit ADC

22nd September 2008

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Datasheet

Texas Instruments has introduced what it says is the market’s first 16-bit, single-channel, 200 mega samples per second (MSPS) analog-to-digital converter (ADC) to provide faster speeds previously only available with lower resolution ADCs. The new data converters enable new levels of performance in communications, test and measurement, and defense applications. Evaluation modules (EVMs) simplify design and enable rapid evaluations of these complex systems.

“High-speed converter growth is being fueled by faster speed and resolution requirements in medical, wireless communications and broadband infrastructure. In fact, ADCs with sample rates of 50 MSPS or greater are expected to grow at a rate of 17 percent from 2008 to 2013,” said Susie Inouye, principal analyst with Databeans. “TI is delivering converters to address high speed and resolution requirements, allowing customers to enable new applications like 4G communications.”

The ADS5485 delivers speed, resolution and ultra-low noise to optimize performance in these applications. For instance, the ADC can achieve a signal-to-noise ratio of 75 dBFS and a spurious-free dynamic range of 87 dBc for a 70-MHz input frequency (IF). The ADS5485 eases analog front end design by incorporating a fully differential input buffer. Developed in TI’s BiCom3 high-speed process technology, this buffer provides constant input impedance over input frequency and eliminates kickback from the ADC’s track-and-hold structure to ensure consistent linearity of the signal.

The performance of the ADS5485 increases design flexibility and offers a number of system-level benefits in communications, test and measurement and defense applications, such as the following:
· Enables 16-bit resolution with up to 100-MHz bandwidth for high-speed digitizers, spectrum analyzers, test and measurement equipment, and general data acquisition systems
· Improves transmit power amplifier linearization and efficiency combined with a digital pre-distortion algorithm, lowering total system cost
· Enables sampling of larger bandwidths in radar systems, resulting in enhanced tracking resolution and object discrimination
· Allows software-defined radios to implement a greater number of standards such as WiMAX, LTE and CDMA

“TI continues to push the performance envelope with high-speed ADCs. The ADS5485 was a clear choice for our new Model 7150 Quad A/D Software Radio Module. The higher sample rate means that users will be able to directly digitize nearly 100 MHz of bandwidth, which is invaluable for our customers working on wideband radar and wideband communication systems,” said Robert Sgandurra, senior product manager with Pentek.