The ADS5474, by Texas Instruments Incorporated (TI) (NYSE: TXN), is the industry’s fastest monolithic 14-bit analog-to-digital converter (ADC) at 400 mega samples per second (MSPS). The new ADC offers 11.1 effective number of bits (ENOB) at this speed, enabling high-bandwidth applications such as test and measurement instrumentation, software-defined radio, radar systems and communication instrumentation that were previously confined to lesser resolution ADCs.
Enabled by TI’s proprietary BiCom3 process technology, the ADS5474 integrates an on-chip buffer amplifier to ease analog front-end (AFE) design. The buffer amplifier eliminates sample-and-hold kick-back and provides a high input impedance over time and frequency, simplifying the AFE design for wide bandwidth applications from DC to intermediate frequencies (IF) well above 200 MHz. Additionally, the ADS5474 is pin-for-pin compatible to the ADS5463 12-bit, 500-MSPS ADC, in a space-saving 14-mm x 14-mm package, providing an easy design path across multiple systems using TI ADCs.
The 400-MSPS sample rate provided by the ADS5474 with 70-dBFS signal-to-noise ratio (SNR) through first Nyquist and 69-dBFS SNR through second Nyquist offers a number of benefits to the customer in these applications:
- Enables 14-bit resolution with 200-MHz bandwidth for high-speed digitizers, spectrum analyzers, test and measurement equipment and general data acquisition systems
- Improves transmit power amplifier linearization and efficiency when used in conjunction 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 with higher sensitivity
The ADS5474 is available now in an 80-pin TQFP PowerPAD(TM) package (14 mm x 14mm) and is priced at $150.00 each in 1,000-piece quantities. Samples and evaluation modules (EVMs) are available.
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