SBOS793H April   2017  – November 2023 INA181 , INA2181 , INA4181

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 High Bandwidth and Slew Rate
      2. 7.3.2 Bidirectional Current Monitoring
      3. 7.3.3 Wide Input Common-Mode Voltage Range
      4. 7.3.4 Precise Low-Side Current Sensing
      5. 7.3.5 Rail-to-Rail Output Swing
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Mode
      2. 7.4.2 Unidirectional Mode
      3. 7.4.3 Bidirectional Mode
      4. 7.4.4 Input Differential Overload
      5. 7.4.5 Shutdown Mode
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Basic Connections
      2. 8.1.2 RSENSE and Device Gain Selection
      3. 8.1.3 Signal Filtering
      4. 8.1.4 Summing Multiple Currents
      5. 8.1.5 Detecting Leakage Currents
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
    3. 8.3 Power Supply Recommendations
      1. 8.3.1 Common-Mode Transients Greater Than 26 V
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Development Support
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

5 Pin Configuration and Functions

GUID-BBFE994F-8E9E-4CBC-92FA-505E626FE572-low.svg Figure 5-1 INA181: DBV Package6-Pin SOT-23Top View
GUID-20231113-SS0I-30JQ-5W3N-D8RCZGWXW8XS-low.svg Figure 5-2 INA181: DCK Package6-Pin SC70Top View
Table 5-1 Pin Functions: INA181 (Single Channel)
PIN TYPE DESCRIPTION
NAME SOT-23 SC70
GND 2 2 Analog Ground
IN– 4 5 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 4 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 6 Analog output Output voltage
REF 5 1 Analog input Reference input
VS 6 3 Analog Power supply, 2.7 V to 5.5 V
GUID-3EAC79D8-57C0-41D7-BDB2-FF442BCB3BF3-low.svgFigure 5-3 INA2181: DGS Package10-Pin VSSOPTop View
GUID-F870425D-1DE7-486A-9158-F18C3A8948CA-low.svg
A. Thermal Pad can be left floating or connected to GND.
Figure 5-4 INA2181: DSQ Package10-Pin WSONTop View
GUID-4F29C91C-B43B-4E64-B775-892247FBEAD0-low.svg Figure 5-5 INA4181: PW Package20-Pin TSSOPTop View
Table 5-2 Pin Functions: INA2181 (Dual Channel) and INA4181 (Quad Channel)
PIN TYPE DESCRIPTION
NAME INA2181 INA4181
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