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  • ADS833x Low-Power, 16-Bit, 500-kSPS, 4- and 8-Channel Unipolar Input Analog-to-Digital Converters With Serial Interface

    • SBAS363E December   2009  – August 2016 ADS8331 , ADS8332

      PRODUCTION DATA.  

  • CONTENTS
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  • ADS833x Low-Power, 16-Bit, 500-kSPS, 4- and 8-Channel Unipolar Input Analog-to-Digital Converters With Serial Interface
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Companion Products
  6. 6 Device Comparison
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1  Absolute Maximum Ratings
    2. 8.2  ESD Ratings
    3. 8.3  Recommended Operating Conditions
    4. 8.4  Thermal Information
    5. 8.5  Electrical Characteristics: VA = 2.7 V
    6. 8.6  Electrical Characteristics: VA = 5 V
    7. 8.7  Timing Requirements: VA = 2.7 V
    8. 8.8  Timing Characteristics: VA = 5 V
    9. 8.9  Typical Characteristics: DC Performance
    10. 8.10 Typical Characteristics: AC Performance
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Signal Conditioning
      2. 9.3.2 Analog Input
        1. 9.3.2.1 Driver Amplifier Choice
        2. 9.3.2.2 Bipolar to Unipolar Driver
    4. 9.4 Device Functional Modes
      1. 9.4.1 Reference
      2. 9.4.2 Converter Operation
        1. 9.4.2.1 Manual Channel Select Mode
        2. 9.4.2.2 Auto Channel Select Mode
        3. 9.4.2.3 Start of a Conversion
        4. 9.4.2.4 Status Output Pin (EOC/INT)
        5. 9.4.2.5 Power-Down Modes and Acquisition Time
    5. 9.5 Programming
      1. 9.5.1 Digital Interface
        1. 9.5.1.1 Internal Register
      2. 9.5.2 Writing to the Converter
        1. 9.5.2.1 Configuring the Converter and Default Mode
      3. 9.5.3 Reading the Configuration Register
      4. 9.5.4 Reading the Conversion Result
        1. 9.5.4.1 TAG Mode
        2. 9.5.4.2 Daisy-Chain Mode
      5. 9.5.5 Reset Function
  10. 10Application and Implementation
    1. 10.1 Application Information
      1. 10.1.1 ADC Reference Driver
        1. 10.1.1.1 Reference Driver Circuit for VREF = 4.096 V
        2. 10.1.1.2 Reference Driver Circuit for VREF=2.5 V, VA=2.7 V
      2. 10.1.2 ADC Input Driver
        1. 10.1.2.1 Input Amplifier Selection
        2. 10.1.2.2 ADC Input RC Filter
    2. 10.2 Typical Applications
      1. 10.2.1 DAQ Circuit for Low Noise and Distortion Performance for a 10-kHz Input Signal at 500 kSPS
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
        3. 10.2.1.3 Application Curve
      2. 10.2.2 Ultra Low-Power DAQ Circuit for DC Input Signals at 10 kSPS per Channel
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Documentation Support
      1. 13.1.1 Related Documentation
    2. 13.2 Related Links
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Community Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information
  15. IMPORTANT NOTICE
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DATA SHEET

ADS833x Low-Power, 16-Bit, 500-kSPS, 4- and 8-Channel Unipolar Input Analog-to-Digital Converters With Serial Interface

1 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

2 Applications

  • Communications
  • Transducer Interfaces
  • Medical Instruments
  • Magnetometers
  • Industrial Process Controls
  • Data Acquisition Systems
  • Automatic Test Equipment

3 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 VQFN and 24-pin TSSOP packages and are fully specified for operation over the industrial –40°C to 85°C temperature range.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
ADS833x VQFN (24) 4.00 mm × 4.00 mm
TSSOP (24) 7.80 mm × 4.40 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Block Diagram

ADS8331 ADS8332 fbd_bas363.gif

4 Revision History

Changes from D Revision (October 2015) to E Revision

  • Changed VA parameter maximum specification in Recommended Operating Conditions tableGo

Changes from C Revision (May 2012) to D Revision

  • Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go

Changes from B Revision (December 2010) to C Revision

  • Changed name of last column in Low-Power, High-Speed, SAR Converter Family tableGo
  • Deleted 4-channel and 8-channel rows from 14-Bit Pseudo-Diff resolution in Low-Power, High-Speed, SAR Converter Family tableGo
  • Added last paragraph to Start of a Conversion sectionGo
  • Changed VA value from 3.3 V to 2.7 V and VREF value from 4.096 V to 2.5 VGo

Changes from A Revision (November 2010) to B Revision

  • Deleted Ordering Information table Go

5 Companion Products

Part number Name
REF3240 4.096V 4ppm/°C, 100uA SOT23-6 Series (Bandgap) Voltage Reference
DAC8562 16-bit, dual-channel, low-power, ultra-low glitch, buffered voltage output DAC with 2.5V,4ppm/°C ref
DAC8568 16-bit, octal-channel, ultra-low glitch, voltage output DAC with 2.5V, 2ppm/°C internal reference
LM5160 Wide Input 65V, 1.5A Synchronous Step-Down DC-DC Conv
OPA2348 1MHz, 45uA, RRIO, Dual Op Amp

6 Device Comparison

RESOLUTION CHANNELS fS ≤ 250 kSPS 250 kSPS < fS ≤ 500 kSPS 500 kSPS < fS ≤ 1 MSPS
18 bits 8 — ADS8698 —
4 — ADS8694 —
16 bits 8 ADS8344 ADS8688 —
ADS8345 ADS8688A
4 ADS8341 ADS8684 —
ADS8342
ADS8684A
ADS8343
14 bits 8 TLC3548 ADS8678 —
TLC3578
4 TLC3544 ADS8674 ADS7263
TLC3574

 
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