ADS8331 - 2.7V-to-5.5V 16-Bit 500kSPS Low-Power Serial Analog-to-Digital Converter (ADC)

The ADS8331 is a low-power, 16-bit, 500-k samples-per-second (SPS) analog-to-digital converter (ADC) with a unipolar, 4-to-1 multiplexer (mux) input. The device includes a 16-bit capacitor-based successive approximation register (SAR) ADC with inherent sample and hold.

The ADS8332 is based on the same core and includes a unipolar 8-to-1 input mux. Both devices offer a high-speed, wide-voltage serial interface and are capable of daisy-chain operation when multiple converters are used.

These converters are available in 24-pin, 4 × 4 QFN and 24-pin TSSOP packages and are fully specified for operation over the industrial –40°C to 85°C temperature range.

• Low-Power, Flexible Supply Range:
  • 2.7-V to 5.5-V Analog Supply
  • 8.7 mW (250 kSPS in Auto-NAP Mode,
    VA = 2.7 V, VBD = 1.65 V)
  • 14.2 mW (500 kSPS, VA = 2.7 V,
    VBD = 1.65 V)
• Up to 500-kSPS Sampling Rate
• Excellent DC Performance:
  • ±1.2 LSB Typical, ±2 LSB Maximum INL at
    2.7 V
  • ±0.6 LSB Typical, –1/1.5 LSB Maximum DNL
    at 2.7 V
  • 16-Bit NMC Over Temperature
• Excellent AC Performance at 5 V, f_IN = 1 kHz:
  • 91.5-dB SNR, 101-dB SFDR, –100-dB THD
• Flexible Analog Input Arrangement:
  • On-Chip 4-/8-Channel Mux With Breakout
  • Auto/Manual Channel Select and Trigger
• Other Hardware Features:
  • On-Chip Conversion Clock (CCLK)
  • Software/Hardware Reset
  • Programmable Status/Polarity EOC/INT
  • Daisy-Chain Mode
  • Global CONVST (Independent of CS)
  • Deep, Nap, and Auto-NAP Powerdown Modes
  • SPI™/DSP Compatible Serial Interface
  • Separate I/O Supply: 1.65 V to VA
  • SCLK up to 40 MHz (VA = VBD = 5 V)
• 24-Pin 4-mm × 4-mm VQFN and 24-Pin TSSOP
  Packages