ADS92x4R Dual, Low-Latency, Simultaneous-Sampling SAR ADC

1 Features

• High resolution, high throughput:
  • ADS9224R: 16 bits, 3 MSPS, low latency: 333 ns
  • ADS9234R: 14 bits, 3.5 MSPS, low latency: 285 ns
• Two unipolar, fully differential simultaneously sampled channels
• Excellent DC and AC performance:
  • ADS9224R:
    • 16-bit NMC DNL, ±2-LSB max INL
    • 94-dB SNR, –109-dB THD
    • 88-dB SINAD at 1 MHz
  • ADS9234R:
    • 14-bit NMC DNL, ±1-LSB max INL
    • 85.6-dB SNR, –106-dB THD
    • 84-dB SINAD at 1 MHz
• Feature integration:
  • Internal reference and reference buffers
  • Internal REFby2 buffer for setting common-mode
  • Data averaging
• Enhanced-SPI interface for MCUs and FPGAs:
  • Wide read cycle to read data with MCUs
  • Clock re-timer for data transfers with digital isolators
  • DDR modes for FPGAs
  • Parallel byte mode for easy interface
• Extended temperature range: –40°C to +125°C

2 Applications

• Optical encoders: incremental and absolute
• SONAR receivers
• Optical networking: EDFA gain-control loop
• Power-quality measurement
• Digital power supply
• I/Q demodulators
• Medical imaging: CT scanners, MRI scanners
• Impedance analyzers