SBAS769 March 2017 ADS7056


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1Absolute Maximum Ratings
    2. 6.2ESD Ratings
    3. 6.3Recommended Operating Conditions
    4. 6.4Thermal Information
    5. 6.5Electrical Characteristics
    6. 6.6Timing Requirements
    7. 6.7Switching Characteristics
    8. 6.8Typical Characteristics
  7. Parameter Measurement Information
    1. 7.1Digital Voltage Levels
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
      1. 8.3.1Analog Input
      2. 8.3.2Reference
      3. 8.3.3ADC Transfer Function
    4. 8.4Device Functional Modes
      1. 8.4.1ACQ State
      2. 8.4.2CNV State
      3. 8.4.3OFFCAL State
        1. Calibration on Power-Up
        2. Calibration During Normal Operation
  9. Application and Implementation
    1. 9.1Application Information
    2. 9.2Typical Applications
      1. 9.2.1Single-Supply Data Acquisition With the ADS7056
        1. Requirements
        2. Design Procedure
          1. Distortion Charge Kickback Filter Design
          2. Amplifier Selection
          3. Circuit
        3. Curves
      2. 9.2.2High Bandwidth (1 MHz) Data Acquisition With the ADS7056
        1. Requirements
        2. Design Procedure
        3. Curves
      3. 9.2.314-Bit, 10-kSPS DAQ Circuit Optimized for DC Sensor Measurements
        1. Requirements
        2. Design Procedure
        3. Curve
  10. 10Power Supply Recommendations
    1. 10.1AVDD and DVDD Supply Recommendations
    2. 10.2Optimizing Power Consumed by the Device
      1. 10.2.1Estimating Digital Power Consumption
  11. 11Layout
    1. 11.1Layout Guidelines
    2. 11.2Layout Example
  12. 12Device and Documentation Support
    1. 12.1Documentation Support
      1. 12.1.1Related Documentation
    2. 12.2Receiving Notification of Documentation Updates
    3. 12.3Community Resources
    4. 12.4Trademarks
    5. 12.5Electrostatic Discharge Caution
    6. 12.6Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RUG|8
Orderable Information


  • 2.5-MSPS Throughput
  • Ultra-Small Size SAR ADC:
    • X2QFN-8 Package with 2.25-mm2 Footprint
  • Wide Operating Range:
    • AVDD: 2.35 V to 3.6 V
    • DVDD: 1.65 V to 3.6 V (Independent of AVDD)
    • Temperature Range: –40°C to +125°C
  • Unipolar Input Range: 0 V to AVDD
  • Excellent Performance:
    • 14-Bit NMC DNL, ±2-LSB INL
    • 74.5-dB SINAD at 2-kHz
    • 73.7-dB SINAD at 1-MHz
  • Ultra-Low Power Consumption:
    • 3.5 mW at 2.5-MSPS with 3.3-V AVDD
    • 158 µW at 100-kSPS with 3.3-V AVDD
  • Integrated Offset Calibration
  • SPI-Compatible Serial Interface: 60-MHz
  • JESD8-7A Compliant Digital I/O


  • Sonar Receivers
  • Optical Line Cards and Modules
  • Thermal Imaging
  • Ultrasonic Flow Meters
  • Motor Controls
  • Handheld Radios
  • Environmental Sensing
  • Fire and Smoke Detection


The ADS7056 is a 14-bit, 2.5-MSPS, analog-to-digital converter (ADC). The device includes a capacitor-based, successive-approximation register (SAR) ADC that supports a wide analog input voltage range (0 V to AVDD, for AVDD in the range of 2.35 V to 3.6 V).

The SPI-compatible serial interface is controlled by the CS and SCLK signals. The input signal is sampled with the CS falling edge and SCLK is used for conversion and serial data output. The device supports a wide digital supply range (1.65 V to 3.6 V), enabling direct interfacing to a variety of host controllers. The ADS7056 complies with the JESD8-7A standard for a normal DVDD range (1.65 V to 1.95 V).

The ADS7056 is available in an 8-pin, miniature, X2QFN package and is specified over the extended industrial temperature range (–40°C to +125°C). Miniature form-factor and extremely low-power consumption make this device suitable for space-constrained and battery-powered applications.

Device Information(1)

ADS7056X2QFN (8)1.50 mm × 1.50 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Typical Application

ADS7056 fbd_sbas769.gif


The ADS7056 is smaller than a 0805 (2012 metric) SMD component.