Pin-compatiblility makes upgrading ADCs simple

Building upon the ADS5500 14-bit, 125-MSPS (mega samples per second) data converter, Texas Instruments announced five new members of the ADS5500 high-speed analog-to-digital converter (ADC) family. The ADS5500 family now consists of three 14-bit ADCs and three 12-bit ADCs available in speeds of 80, 100 and 125 MSPS.

The pin-compatible family of ADCs provides customers with an easy upgrade path. Designers now have a range of resolutions, speed, and performance options tailored for their application requirements. Each device offers superior dynamic performance and high IF capability, allowing higher system integration and greater flexibility in advanced communications, test and measurement, medical, video, imaging, industrial and many other applications.

The 14-bit ADS5541 combines high performance (71dB SNR) at high speed (105 MSPS) with one half the power (710mW) of competitive devices, while the 14-bit ADS5542 provides an economical 80-MSPS device with low power (670mW) and excellent high-frequency performance.

The ADS5520 (12-bit, 125 MSPS) and the ADS5521 (12-bit, 105 MSPS) deliver 69dB SNR at 100-MHz input frequency (IF). The ADS5522 (12-bit, 80 MSPS) offers a higher SNR of 70dB. In addition, the 12-bit devices offer the lowest power dissipation for any 12-bit ADC at the 105 and 125 MSPS nodes.

The ADS5500 family is optimized to work with TI's high-performance C6000 DSP platform, which is used in applications ranging from third-generation wireless communications infrastructure to high-resolution medical imaging. TI also has a range of amplifiers, such as the recently announced OPA695 1.4-GHz current-feedback amplifier, that are well suited to work with the ADS5500 family of data converters to achieve highest performance.

Equipment manufacturers can capitalize on the performance of the ADS5500 family to achieve a wide range of benefits, such as improved receiver performance in wireless communications, higher quality imaging in video systems, extended signal analysis capabilities for test equipment, and more precise analysis in medical instrumentation.

The low power dissipation reduces power supply requirements and the need for thermal management (cooling), resulting in smaller footprint and equipment size, higher circuit density and reduced system cost. The power savings also enables next-generation, high-performance portable wireless, test and measurement, and video imaging systems.

The ADS5500 Family

Device Bits MSPS SNR (dB) SFDR (dB) Power (mW) Price (US$)
ADS5500 14 125 70.5 82 780 $95.00
ADS5541 14 105 71 85 710 $75.00
ADS5542 14 80 72 82 670 $35.00
ADS5520 12 125 69 82 740 $65.00
ADS5521 12 105 69 85 700 $60.00
ADS5522 12 80 70 82 660 $21.00

Performance @ 100-MHz Input Frequency, Typical Values

Availability and Packaging
The five new members of the ADS5500 family are sampling now, with volume production scheduled for 3Q 2004. All devices are available in 64-TQFP PowerPad packages. Evaluation modules (EVMs) are also available.

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