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Optimizing THS4509 to Drive High Speed ADCs Reference Design
TIDA-00093
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Description
This reference design shows the ability of the high-speed amplifier, THS4509 to perform single-ended to differential conversion to drive high-speed analog-to-digital converters (ADCs) while maintaining excellent noise and distortion performance. Performance versus input frequency is shown for both AC and DC coupled applications while interfaced to the ADS4449 quad, 250-MSPS, 14-bit ADC. Various options for common-mode voltages, power supplies, and interfaces are discussed and measured to meet the requirements of a variety of applications. Anti-aliasing filter examples are shown along with the performance improvements that they provide.
Features
- High-speed single-ended to differential conversion while maintain excellent performance
- System performance results for THS4509 driving ADS4449
- SFDR > 77 dBFs, SNR > 71 dBFS in first Nyquist zone
- SFDR > 69 dBFs, SNR > 67 dBFS in second Nyquist zone - Examples of both AC and DC coupled interfaces
- Demonstrates anti-aliasing filter design and performance gains
- Amplifier power supply design considerations for best performance are discussed
See the Important Notice and Disclaimer covering reference designs and other TI resources.
