ADS8331 (ACTIVE)

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

 

Description

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.

Features

  • 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
    Packages

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

 
Resolution (Bits)
Sample Rate (max) (SPS)
# Input Channels
Multi-Channel Configuration
Input Type
Power Consumption (Typ) (mW)
Input Range (Min) (V)
Input Range (Max) (V)
Interface
Features
Analog Voltage AVDD (Min) (V)
Analog Voltage AVDD (Max) (V)
Architecture
Operating Temperature Range (C)
Pin/Package
THD (Typ) (dB)
SNR (dB)
Reference Mode
ADS8331 ADS8168 ADS8332 ADS8344
16    16    16    16   
500000      500000    100000   
4    8    8    8   
Multiplexed    Multiplexed    Multiplexed    Multiplexed   
Pseudo-Differential
Single-Ended   
Differential
Pseudo-Differential
Single-Ended   
Pseudo-Differential
Single-Ended   
Pseudo-Differential
Single-Ended   
14.2      14.2    3.2   
0    -2.048    0    0   
4.2    2.048    4.2    5.25   
SPI    SPI    SPI    Serial   
Daisy-Chainable    Comparator    Daisy-Chainable    N/A   
2.7    3    2.7    2.7   
5.5    5.5    5.5    5.25   
SAR    SAR    SAR    SAR   
-40 to 85    -40 to 125    -40 to 85    -40 to 85   
24TSSOP
24VQFN   
32VQFN    24TSSOP
24VQFN   
20SSOP
20SSOP   
-101    -110    -101    -90   
91.5    92    91.5    89   
Ext    Int    Ext    Ext   

WEBENCH® Designer ADS8331