SLYS018C April   2018  – April 2020 INA181-Q1 , INA2181-Q1 , INA4181-Q1

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
    1.     Device Images
      1.      Typical Application Circuit
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
    1.     Pin Functions: INA181-Q1 (Single Channel)
    2.     Pin Functions: INA2181-Q1 (Dual Channel) and INA4181-Q1 (Quad Channel)
  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. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagrams
    3. 8.3 Feature Description
      1. 8.3.1 High Bandwidth and Slew Rate
      2. 8.3.2 Bidirectional Current Monitoring
      3. 8.3.3 Wide Input Common-Mode Voltage Range
      4. 8.3.4 Precise Low-Side Current Sensing
      5. 8.3.5 Rail-to-Rail Output Swing
    4. 8.4 Device Functional Modes
      1. 8.4.1 Normal Mode
      2. 8.4.2 Unidirectional Mode
      3. 8.4.3 Bidirectional Mode
      4. 8.4.4 Input Differential Overload
      5. 8.4.5 Shutdown Mode
  9. Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Basic Connections
      2. 9.1.2 RSENSE and Device Gain Selection
      3. 9.1.3 Signal Filtering
      4. 9.1.4 Summing Multiple Currents
      5. 9.1.5 Detecting Leakage Currents
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
    1. 10.1 Common-Mode Transients Greater Than 26 V
  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 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Related Links
    4. 12.4 Receiving Notification of Documentation Updates
    5. 12.5 Support Resources
    6. 12.6 Trademarks
    7. 12.7 Electrostatic Discharge Caution
    8. 12.8 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

Pin Configuration and Functions

INA181-Q1: DBV Package
6-Pin SOT-23
Top View

Pin Functions: INA181-Q1 (Single Channel)

PIN TYPE DESCRIPTION
NAME NO.
GND 2 Analog Ground
IN– 4 Analog input Current-sense amplifier negative input. For high-side applications, connect to load side of sense resistor. For low-side applications, connect to ground side of sense resistor.
IN+ 3 Analog input Current-sense amplifier positive input. For high-side applications, connect to bus-voltage side of sense resistor. For low-side applications, connect to load side of sense resistor.
OUT 1 Analog output Output voltage
REF 5 Analog input Reference input
VS 6 Analog Power supply, 2.7 V to 5.5 V
INA2181-Q1: DGS Package
10-Pin VSSOP
Top View
INA4181-Q1: PW Package
20-Pin TSSOP
Top View

Pin Functions: INA2181-Q1 (Dual Channel) and INA4181-Q1 (Quad Channel)

PIN TYPE DESCRIPTION
NAME INA2181-Q1 INA4181-Q1
GND 4 16 Analog Ground
IN–1 2 3 Analog input Current-sense amplifier negative input for channel 1. For high-side applications, connect to load side of channel-1 sense resistor. For low-side applications, connect to ground side of channel-1 sense resistor.
IN+1 3 4 Analog input Current-sense amplifier positive input for channel 1. For high-side applications, connect to bus-voltage side of channel-1 sense resistor. For low-side applications, connect to load side of channel-1 sense resistor.
IN–2 8 7 Analog input Current-sense amplifier negative input for channel 2. For high-side applications, connect to load side of channel-2 sense resistor. For low-side applications, connect to ground side of channel-2 sense resistor.
IN+2 7 6 Analog input Current-sense amplifier positive input for channel 2. For high-side applications, connect to bus-voltage side of channel-2 sense resistor. For low-side applications, connect to load side of channel-2 sense resistor.
IN–3 14 Analog input Current-sense amplifier negative input for channel 3. For high-side applications, connect to load side of channel-3 sense resistor. For low-side applications, connect to ground side of channel-3 sense resistor.
IN+3 15 Analog input Current-sense amplifier positive input for channel 3. For high-side applications, connect to bus-voltage side of channel-3 sense resistor. For low-side applications, connect to load side of channel-3 sense resistor.
IN–4 18 Analog input Current-sense amplifier negative input for channel 4. For high-side applications, connect to load side of channel-4 sense resistor. For low-side applications, connect to ground side of channel-4 sense resistor.
IN+4 17 Analog input Current-sense amplifier positive input for channel 4. For high-side applications, connect to bus-voltage side of channel-4 sense resistor. For low-side applications, connect to load side of channel-4 sense resistor.
NC 10, 11 NC denotes no internal connection. These pins can be left floating or connected to any voltage between VS and ground.
OUT1 1 2 Analog output Channel 1 output voltage
OUT2 9 8 Analog output Channel 2 output voltage
OUT3 13 Analog output Channel 3 output voltage
OUT4 19 Analog output Channel 4 output voltage
REF1 5 1 Analog input Channel 1 reference voltage, 0 to VS
REF2 6 9 Analog input Channel 2 reference voltage, 0 to VS
REF3 12 Analog input Channel 3 reference voltage, 0 to VS
REF4 20 Analog input Channel 4 reference voltage, 0 to VS
VS 10 5 Analog Power supply pin, 2.7 V to 5.5 V