SBAS543C August   2011  – February 2016 ADS8528 , ADS8548 , ADS8568

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Electrical Characteristics: General
    6. 7.6  Electrical Characteristics: ADS8528
    7. 7.7  Electrical Characteristics: ADS8548
    8. 7.8  Electrical Characteristics: ADS8568
    9. 7.9  Serial Interface Timing Requirements
    10. 7.10 Parallel Interface Timing Requirements (Read Access)
    11. 7.11 Parallel Interface Timing Requirements (Write Access)
    12. 7.12 Typical Characteristics
  8. 8 Parameter Measurement information
    1. 8.1 Equivalent Circuits
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Analog
        1. 9.3.1.1 Analog Inputs
        2. 9.3.1.2 Analog-to-Digital Converter (ADC)
        3. 9.3.1.3 Conversion Clock
        4. 9.3.1.4 CONVST_x
        5. 9.3.1.5 Data Readout and BUSY/INT Signal
        6. 9.3.1.6 Sequential Operation
        7. 9.3.1.7 Reference
      2. 9.3.2 Digital
        1. 9.3.2.1 Device Configuration
        2. 9.3.2.2 Parallel Interface
        3. 9.3.2.3 Serial Interface
        4. 9.3.2.4 Output Data Format
    4. 9.4 Device Functional Modes
      1. 9.4.1 Hardware Mode
      2. 9.4.2 Software Mode
      3. 9.4.3 Daisy-Chain Mode
      4. 9.4.4 Reset and Power-Down Modes
    5. 9.5 Register Maps
      1. 9.5.1 Configuration (CONFIG) Register
        1. 9.5.1.1 CONFIG: Configuration Register (default = 000003FFh)
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curve
  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 Community Resources
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

1 Features

  • Family of 12-, 14-, and 16-Bit, Pin- and Software-Compatible ADCs
  • Maximum Data Rate per Channel:
    • ADS8528: 650 kSPS (PAR) or
      480 kSPS (SER)
    • ADS8548: 600 kSPS (PAR) or
      450 kSPS (SER)
    • ADS8568: 510 kSPS (PAR) or
      400 kSPS (SER)
  • Excellent AC Performance:
    • Signal-to-Noise Ratio:
      ADS8528: 73.9 dB, ADS8548: 85 dB, ADS8568: 91.5 dB
    • Total Harmonic Distortion:
      ADS8528: –89 dB, ADS8548: –91 dB, ADS8568: –94 dB
  • Programmable, Buffered Internal Reference:
    0.5 V–2.5 V or 0.5 V–3.0 V Supports Input Voltage Ranges up to ±12 V
  • Selectable Parallel or Serial Interface
  • Scalable Low-Power Operation Using Auto-Sleep Mode: Only 32 mW at 10 kSPS
  • Fully Specified Over Extended Industrial Temperature Range

2 Applications

  • Protection Relays
  • Power Quality Measurement
  • Multi-Axis Motor Controls
  • Programmable Logic Controllers
  • Industrial Data Acquisition

SNR vs Temperature

ADS8528 ADS8548 ADS8568 G016_BAS543.png

3 Description

The ADS85x8 contain eight low-power, 12-, 14-, or 16-bit, successive approximation register (SAR)-based analog-to-digital converters (ADCs) with true bipolar inputs. These channels are grouped in four pairs, thus allowing simultaneous high-speed signal acquisition of up to 650 kSPS.

The devices support selectable parallel or serial interface with daisy-chain capability. The programmable reference allows handling of analog input signals with amplitudes up to ±12 V.

The ADS85x8 family supports an auto-sleep mode for minimum power dissipation and is available in both 64-pin VQFN and LQFP packages. The entire family is specified over a temperature range of –40°C to +125°C.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
ADS85x8 VQFN (64) 9.00 mm × 9.00 mm
LQFP (64) 10.00 mm × 10.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Block Diagram

ADS8528 ADS8548 ADS8568 alt_sbas543.gif

4 Revision History

Changes from B Revision (November 2015) to C Revision

  • Changed Figure 45: changed capacitor values from 820 nF to 820 pF Go

Changes from A Revision (October 2011) to B Revision

  • Added ESD Ratings table, Recommended Operating Conditions table, Feature Description section, Device Functional Modes section, Register Maps section, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information sectionGo
  • Changed title of Device Comparison Table, deleted footnote 1 Go
  • Added Storage temperature parameter to Absolute Maximum Ratings tableGo
  • Changed Clock cycles per conversion to be a single parameter instead of part of tCONV parameter in Serial Interface Timing Requirements table Go
  • Changed tBUFS parameter in Serial Interface Timing Requirements tableGo
  • Added footnote 3 to Serial Interface Timing Requirements tableGo
  • Changed Clock cycles per conversion to be a single parameter instead of part of tCONV parameter in Parallel Interface Timing Requirements (Read Access) table Go
  • Changed tBUCS parameter in Parallel Interface Timing Requirements (Read Access) table Go
  • Added footnote 3 to Parallel Interface Timing Requirements (Read Access) table Go
  • Changed Data Readout and BUSY/INT Signal sectionGo
  • Added Sequential Operation sectionGo
  • Changed description of initiating a new conversion in Reset and Power-Down Modes sectionGo

Changes from * Revision (August 2011) to A Revision

  • Deleted INL column from Family/Ordering Information tableGo
  • Changed DC Accuracy, INL parameter in ADS8568 Electical Chatacteristics tableGo