SBOS401C July   2007  – April 2016 INA270A-Q1 , INA271A-Q1

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 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Output Voltage Range
    4. 8.4 Device Functional Modes
      1. 8.4.1 First- or Second-Order Filtering
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Basic Connection
      2. 9.1.2 Selecting RS
      3. 9.1.3 Accuracy Variations as a Result of VSENSE and Common-Mode Voltage
        1. 9.1.3.1 Normal Case 1: VSENSE ≥ 20 mV, VCM ≥ VS
        2. 9.1.3.2 Low VSENSE Case 1: VSENSE < 20 mV, -16 V ≤ VCM < 0; and Low VSENSE Case 3: VSENSE < 20 mV, VS < VCM ≤ 80 V
        3. 9.1.3.3 Low VSENSE Case 2: VSENSE < 20 mV, 0 V ≤ VCM ≤ VS
      4. 9.1.4 Transient Protection
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Shutdown
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 RFI and EMI
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Related Links
    2. 12.2 Community Resources
    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

1 Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C6
  • Pinout Optimized for External Filtering
  • Wide Common-Mode Range: –16 V to +80 V
  • Accuracy:
    • CMRR: 120 dB
    • ±2.5-mV Offset (Maximum)
    • ±1% Gain Error (Maximum)
    • 20-μV/°C Offset Drift (Maximum)
    • 55-ppm/°C Gain Drift (Maximum)
  • Bandwidth: Up to 130 kHz
  • Two Gain Options Available:
    • 14 V/V (INA270A-Q1)
    • 20 V/V (INA271A-Q1)
  • Quiescent Current: 900 μA (Maximum)
  • Power Supply: 2.7 V to 18 V
  • Packages: SOIC-8

2 Applications

  • Electric Power Steering (EPS) Systems
  • Body Control Modules
  • Brake Systems
  • Electronic Stability Control (ESC) Systems

3 Description

The INA270A-Q1 and INA271A-Q1 (INA27xA-Q1) family of current-shunt monitors with voltage output can sense voltage drops across current shunts at common-mode voltages from –16 V to +80 V, independent of the supply voltage. The INA27xA-Q1 pinouts readily enable filtering.

The INA27xA-Q1 devices are available with two output voltage scales: 14 V/V and 20 V/V. The 130-kHz bandwidth simplifies use in current-control loops.

The INA27xA-Q1 operates from a single 2.7-V to 18-V supply, drawing a maximum of 900 μA of supply current. They are specified over the extended operating temperature range of –40°C to +125°C and are offered in an SOIC-8 package.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
INA270A-Q1 SOIC (8) 4.90 mm × 3.91 mm
INA271A-Q1
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

INA270A-Q1 INA271A-Q1 ai_270_basic_conn.gif