2.7V~5.5V, 16 Bit 500KSPS Low Power Serial ADC - ADS8331


2.7V~5.5V, 16 Bit 500KSPS Low Power Serial 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, fIN = 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

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Parametrics Compare all products in Precision ADC (<=10MSPS)

Resolution (Bits)
Sample Rate (max) (SPS)
# Input Channels
Multi-Channel Configuration
Input Range (Min) (V)
Input Range (Max) (V)
Analog Voltage AV/DD (Min) (V)
Analog Voltage AV/DD (Max) (V)
Integrated Features
Operating Temperature Range (C)
Approx. Price (US$)
Input Type
THD (Typ) (dB)
INL (Max) (+/-LSB)
SNR (dB)
Reference Mode
ADS8331 ADS8332
16     16    
500kSPS     500kSPS    
4     8    
Multiplexed     Multiplexed    
0     0    
5.5     5.5    
Serial SPI     Serial SPI    
2.7     2.7    
5.5     5.5    
SAR     SAR    
Daisy-Chainable     Daisy-Chainable    
Catalog     Catalog    
-40 to 85     -40 to 85    
5.25 | 1ku     6.25 | 1ku    
-100     -100    
2     2    
91.5     91.5    
Ext     Ext    

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