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Analog-To-Digital Converter: LTC2107

April 28, 2014
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LTC2107Linear Technology Corp. announces the LTC2107, a 16-bit 210 Msps high performance high-speed analog-to-digital converter (ADC) for high-end communications receivers and instrumentation applications. The LTC2107 has superior AC performance specifications, achieving 80 dB SNR performance, 4 dB higher than alternative products, and industry leading 98 dB SFDR at baseband. Exceptional aperture jitter of only 45 fsRMS enables direct sampling of frequencies up to 500 MHz with excellent SNR performance.

The LTC2107’s unique features simplify receiver design and improve system performance. An optional internal transparent dither circuit improves the ADC’s SFDR response well beyond 100dBFS for low level input signals. The digital output randomizer and alternate bit polarity mode dramatically reduce unwanted tones caused by digital feedback. The flexible digital outputs can run as full-rate CMOS for sample rates below 100Msps, or double data rate (DDR) LVDS to minimize routing of lines to the FPGA.

The LTC2107 also features a programmable gain amplifier (PGA) front end that sets the ADC input range to either 2.4VP-P or 1.6VP-P. This gives the user the flexibility to trade off between noise and distortion. The best distortion performance is achieved in the 1.6VP-P range while the 2.4VP-P range results in the best noise performance.

The LTC2107 delivers an extensive feature set in a 7mm x 7mm QFN package, and dissipates 1.3W without the need for heat sinking. Designed for ease of use, the LTC2107 requires only a single 2.5V analog supply for operation and comes with a clock duty cycle stabilizer for maintaining the ADC’s performance over varying duty cycles. The LTC2107 can accept high frequency, wide dynamic range signals, offering a wide analog input bandwidth of 800MHz.

The LTC2107 is available today in both commercial and industrial temperature grades, and is competitively priced starting at $99.00 each in 1,000-piece quantities. Demo boards and samples are available via the Linear Technology website www.linear.com/product/LTC2107.

Summary of Features: LTC2107

  • 98dBFS SFDR, 80dBFS SNR
  • Aperture Jitter = 45fsRMS
  • PGA Front-End 2.4VP-P or 1.6VP-P Input Range
  • Optional Internal Dither
  • Optional Data Output Randomizer
  • Power Dissipation: 1280mW
  • Shutdown Mode
  • Serial SPI Port for Configuration
  • Clock Duty Cycle Stabilizer
  • 48-Lead (7mm x 7mm) QFN Package

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