SBOS501F January   2010  – February 2015 INA128-HT , INA129-HT

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Schematic
  5. 5 Revision History
  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: INA128-HT
    5. 7.5 Electrical Characteristics: INA128-HT
    6. 7.6 Electrical Characteristics: INA129-HT
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
      1. 8.4.1 Noise Performance
      2. 8.4.2 Input Common-Mode Range
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Setting the Gain
        2. 9.2.2.2 Dynamic Performance
        3. 9.2.2.3 Offset Trimming
        4. 9.2.2.4 Input Bias Current Return Path
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Low Voltage Operation
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
    2. 12.2 Related Links
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

10 Power Supply Recommendations

The minimum power supply voltage for INA12x is ±2.25 V and the maximum power supply voltage is ±18 V. This minimum and maximum range covers a wide range of power supplies; but for optimum performance, ±15 V is recommended. TI recommends adding a bypass capacitor at the input to compensate for the layout and power supply source impedance.

10.1 Low Voltage Operation

The INA128-HT and INA129-HT can be operated on power supplies as low as ±2.25 V. Performance remains excellent with power supplies ranging from ±2.25 V to ±18 V. Most parameters vary only slightly throughout this supply voltage range.

Operation at very low supply voltage requires careful attention to assure that the input voltages remain within their linear range. Voltage swing requirements of internal nodes limit the input common-mode range with low power supply voltage. Figure 6 and Figure 7 show the range of linear operation for ±15 V, ±5 V, and ±2.5 V supplies.

INA128-HT INA129-HT bridgeamp_bos501.gifFigure 27. Bridge Amplifier
INA128-HT INA129-HT acamp_bos501.gif
1. OPA130 is not tested or characterized at 210°C.
Figure 28. AC-Coupled Instrumentation Amplifier
INA128-HT INA129-HT thermoamp_bos501.gif
1. REF102 is not tested or characterized at 210°C.
Figure 29. Thermocouple Amplifier With RTD Cold-Junction Compensation
INA128-HT INA129-HT diffv_converter_bos501.gif
1. OPA177, OPA131, OPA602, and OPA128 are not tested or characterized at 210°C.
Figure 30. Differential Voltage-to-Current Converter
INA128-HT INA129-HT ecgamp_bos501.gif
1. OPA2131 is not tested or characterized at 210°C.
Figure 31. ECG Amplifier With Right-Leg Drive