SBOS562F August 2011  – July 2016 INA826

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1Absolute Maximum Ratings
    2. 7.2ESD Ratings
    3. 7.3Recommended Operating Conditions
    4. 7.4Thermal Information
    5. 7.5Electrical Characteristics
    6. 7.6Typical Characteristics
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
      1. 8.3.1 Inside the INA826
      2. 8.3.2 Setting the Gain
        1. 8.3.2.1Gain Drift
      3. 8.3.3 Offset Trimming
      4. 8.3.4 Input Common-Mode Range
      5. 8.3.5 Input Protection
      6. 8.3.6 Input Bias Current Return Path
      7. 8.3.7 Reference Terminal
      8. 8.3.8 Dynamic Performance
      9. 8.3.9 Operating Voltage
        1. 8.3.9.1Low-Voltage Operation
      10. 8.3.10Error Sources
    4. 8.4Device Functional Modes
  9. Application and Implementation
    1. 9.1Application Information
    2. 9.2Typical Application
      1. 9.2.1Design Requirements
      2. 9.2.2Detailed Design Procedure
      3. 9.2.3Application Curves
    3. 9.3System Examples
      1. 9.3.1Circuit Breaker
      2. 9.3.2Programmable Logic Controller (PLC) Input
      3. 9.3.3Using TINA-TI SPICE-Based Analog Simulation Program with the INA826
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1Layout Guidelines
      1. 11.1.1CMRR vs Frequency
    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

1 Features

  • Input Common-Mode Range: Includes V–
  • Common-Mode Rejection:
    • 104 dB, Min (G = 10)
    • 100 dB, Min at 5 kHz (G = 10)
  • Power-Supply Rejection: 100 dB, Min (G = 1)
  • Low Offset Voltage: 150 µV, Max
  • Gain Drift: 1 ppm/°C (G = 1), 35 ppm/°C (G > 1)
  • Noise: 18 nV/√Hz, G ≥ 100
  • Bandwidth: 1 MHz (G = 1), 60 kHz (G = 100)
  • Inputs Protected Up to ±40 V
  • Rail-to-Rail Output
  • Supply Current: 200 µA
  • Supply Range:
    • Single Supply: 3 V to 36 V
    • Dual Supply: ±1.5 V to ±18 V
  • Specified Temperature Range:
    –40°C to +125°C
  • Packages: 8-Pin VSSOP, SOIC, and WSON

2 Applications

  • Industrial Process Controls
  • Circuit Breakers
  • Battery Testers
  • ECG Amplifiers
  • Power Automation
  • Medical Instrumentation
  • Portable Instrumentation

3 Description

The INA826 is a low-cost instrumentation amplifier that offers extremely low power consumption and operates over a very wide single or dual supply range. A single external resistor sets any gain from 1 to 1000. The device offers excellent stability over temperature, even at G > 1, as a result of the low gain drift of only 35 ppm/°C (max).

The INA826 is optimized to provide excellent common-mode rejection ratio of over 100 dB (G = 10) over frequencies up to 5 kHz. At G = 1, the common-mode rejection ratio exceeds 84 dB across the full input common-mode range from the negative supply all the way up to 1 V of the positive supply. Using a rail-to-rail output, the INA826 is well-suited for low voltage operation from a 3-V single supply as well as dual supplies up to ±18 V.

Additional circuitry protects the inputs against overvoltage of up to ±40 V beyond the power supplies by limiting the input currents to less than 8 mA.

The INA826 is available in 8-pin SOIC, VSSOP, and tiny 3-mm × 3-mm WSON surface-mount packages. All versions are specified for the –40°C to +125°C temperature range.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
INA826SOIC (8)4.90 mm × 3.91 mm
WSON (8)3.00 mm × 3.00 mm
VSSOP (8)3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

General-Purpose Instrumentation Amplifier

INA826 frontpage_sbos562.gif
1. This resistor is optional if the input voltage stays above [(V–) – 2 V] or if the signal source current drive capability is limited to less than 3.5 mA; see the Input Protection section for more details.