SBOSAD5D December   2022  – November 2024 INA351

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Gain-Setting
        1. 7.3.1.1 Gain Error and Drift
      2. 7.3.2 Input Common-Mode Voltage Range
      3. 7.3.3 EMI Rejection
      4. 7.3.4 Typical Specifications and Distributions
      5. 7.3.5 Electrical Overstress
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Reference Pin
      2. 8.1.2 Input Bias Current Return Path
    2. 8.2 Typical Applications
      1. 8.2.1 Resistive-Bridge Pressure Sensor
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Development Support
        1. 9.1.1.1 PSpice® for TI
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

3 Description

The INA351 is a selectable-gain instrumentation amplifier with integrated reference buffer that offers four gain options across the INA351ABS and INA351CDS variants available in small packages. The INA351ABS has gain options of 10 or 20 and the INA351CDS has gain options of 30 or 50. These gain options can be selected by toggling the gain select (GS) pin. The INA351 is an excellent choice for bridge-type sensing and for differential to single-ended conversion applications.

Built with precision matched integrated resistors, the INA351 saves on BOM costs, pick-and-place machine handling costs, and board space by removing the need for precise or closely-matched external resistors. The INA351 can interface directly to low-speed, 10-bit to 14-bit, analog-to-digital converters (ADCs) and is an excellent choice for replacing discrete implementation of instrumentation amplifiers built with commodity amplifiers and discrete resistors.

Designed with the three-amplifier architecture, the INA351 is optimized for delivering performance. The device achieves 86dB of minimum CMRR and an accurate 0.1% of maximum gain error, along with 1.3mV of maximum offset across all gain options, while consuming just 135µA of maximum quiescent current. The INA351 has an integrated shutdown option to turn off the amplifier when idle for additional power savings in battery-powered applications.

Package Information
PART NUMBER(1)PACKAGE(2)PACKAGE SIZE (3)
INA351ABSDSG (WSON, 8)2mm × 2mm
DDF (SOT-23, 8)1.6mm × 2.9mm
RUG (X2QFN, 10)1.5mm × 2 mm
INA351CDSDSG (WSON, 8)2mm × 2mm
DDF (SOT-23, 8)1.6mm × 2.9mm
RUG (X2QFN, 10)1.5mm × 2mm
(1) See Section 4
(2) For more information, see Section 11.
(3) The package size (length × width) is a nominal value and includes pins, where applicable.