SNAS305J July   2005  – March 2016 ADC121S021

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
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
    4. 9.4 Device Functional Modes
      1. 9.4.1 Normal Mode
      2. 9.4.2 Shutdown Mode
  10. 10Applications Information
    1. 10.1 Application Information
      1. 10.1.1 Using the ADC121S021
        1. 10.1.1.1 Determining Throughput
      2. 10.1.2 ADC121S021 Transfer Function
      3. 10.1.3 Analog Inputs
      4. 10.1.4 Digital Inputs And Outputs
      5. 10.1.5 Power Management
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
    1. 11.1 Power Supply Noise Considerations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Device Nomenclature
    2. 13.2 Community Resources
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • Specified Over a Range of Sample Rates
  • Variable Power Management
  • Single Power Supply With 2.7-V to 5.25-V Range
  • Compatible With the SPI, QSPI, MICROWIRE, and DSP
  • Key Specifications:
    • DNL: 0.45 and –0.25 LSB (Typical)
    • INL: 0.45 and –0.4 LSB (Typical)
    • SNR: 72.3 dB (Typical)
    • Power Consumption
      • 3.6-V Supply: 1.5 mW (Typical)
      • 5.25-V Supply: 7.9 mW (Typical)

2 Applications

  • Portable Systems
  • Remote Data Acquisition
  • Instrumentation and Control Systems

3 Description

The ADC121S021 device is a low-power, single-channel CMOS 12-bit analog-to-digital converter with a high-speed serial interface. Unlike the conventional practice of specifying performance at a single sample rate only, the ADC121S021 is fully specified over a sample rate range of 50 ksps to 200 ksps. The converter is based upon a successive-approximation register architecture with an internal track-and-hold circuit.

The output serial data is straight binary, and is compatible with several standards, such as SPI™, QSPI™, MICROWIRE, and many common DSP serial interfaces.

The ADC121S021 operates with a single supply that can range from 2.7 V to 5.25 V. Normal power consumption using a 3.6-V or 5.25-V supply is 1.5 mW and 7.9 mW, respectively. The power-down feature reduces the power consumption to as low as 2.6 µW using a 5.25-V supply.

The ADC121S021 is packaged in 6-pin WSON and SOT-23 packages. Operation over the industrial temperature range of –40°C to 85°C is ensured.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
ADC121S021 SOT-23 (6) 2.90 mm × 1.60 mm
WSON (6) 2.50 mm × 2.20 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Key Graphic

ADC121S021 block_diagram.gif