SBOSAG2 june   2023 INA351A

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Device Comparison Table
  7. 6 Pin Configuration and Functions
  8. 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 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Gain-Setting
        1. 8.3.1.1 Gain Error and Drift
      2. 8.3.2 Input Common-Mode Voltage Range
      3. 8.3.3 EMI Rejection
      4. 8.3.4 Typical Specifications and Distributions
      5. 8.3.5 Electrical Overstress
    4. 8.4 Device Functional Modes
  10. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Reference Amplifier
      2. 9.1.2 Input Bias Current Return Path
    2. 9.2 Typical Applications
      1. 9.2.1 Resistive-Bridge Pressure Sensor
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Development Support
        1. 10.1.1.1 PSpice® for TI
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DSG|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Description

INA351A is a fixed gain of 10 instrumentation amplifier with a configurable reference amplifier in a small package. This instrumentation amp (INA) is built with precision-matched resistors to achieve excellent CMRR and gain error performance in a small, low-cost form factor. This makes INA351A a great solution to replace discrete INA implementations to achieve higher performance and more compact designs with minimal impact to bill of materials (BOM) costs.

The integrated, configurable reference amplifier can be used as a buffer for external use or as part of a closed-loop calibration circuit to achieve better DC precision. The closed-loop calibration can be accomplished by implementing a servo loop amplifier to calibrate DC errors from sensors (like offset, offset drift and so forth) at the INA output when the INA input signal is at a slightly higher frequency than DC depending on the application.

INA351A achieves 86 dB of minimum CMRR, an accurate 0.1% of maximum gain error and only consumes a maximum of 135 μA quiescent current at room temperature. The INA can directly drive sub-1 kHz, 10-bit to 14-bit, delta-sigma analog-to-digital converters (ADC) without an ADC driver, making it a great choice for portable, battery-powered medical applications like electrocardiograms or wearable health monitors.

Package Information
PART NUMBER(3)PACKAGE(1)PACKAGE SIZE(2)
INA351ADSG (WSON, 8)2 mm × 2 mm
(1) For all available packages, see the package option addendum at the end of the data sheet.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
(3) See Device Comparison table.