SLYS041A March   2020  – March 2021 INA381-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Wide Input Common-Mode Voltage Range
      2. 7.3.2 Precise Low-Side Current Sensing
      3. 7.3.3 High Bandwidth and Slew Rate
      4. 7.3.4 Alert Output
      5. 7.3.5 Adjustable Overcurrent Threshold
      6. 7.3.6 Comparator Hysteresis
    4. 7.4 Device Functional Modes
      1. 7.4.1 Alert Modes
        1. 7.4.1.1 Transparent Output Mode
        2. 7.4.1.2 Latch Output Mode
  8. 8 Applications and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Select a Current-Sensing Resistor
        1. 8.1.1.1 Select a Current-Sensing Resistor: Example
      2. 8.1.2 Increase Comparator Hysteresis
      3. 8.1.3 Operation With Common-Mode Transients Greater Than 26 V
      4. 8.1.4 Input Filtering
    2. 8.2 Typical Applications
      1. 8.2.1 Bidirectional Window Comparator
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Solenoid Low-Side Current Sensing
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6.5 Electrical Characteristics

at TA = 25°C, VSENSE = VIN+ – VIN– = 10 mV, VS = 5 V, VIN+ = 12 V, and CMPREF = 2 V (unless otherwise noted)
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
INPUT
CMRRCommon-mode rejection ratio, RTI(1)VIN+ = 0 V to 26 V, TA= –40°C to +125°C84100dB
VOSOffset voltage, RTI(1)VIN+ = 12 V, VIN– = 12 V±100±500μV
VIN+ = 0 V, VIN– = 0 V±25±150
dVOS/dTOffset voltage drift, RTI(1)TA= –40°C to +125°C0.11μV/°C
PSRRPower-supply rejection ratioVS = 2.7 V to 5.5 V, TA= –40°C to +125°C±8±40μV/V
IBInput bias currentVSENSE = 0 mV, IB+, IB–80μA
IOSInput offset currentVSENSE = 0 mV±0.05μA
OUTPUT
GGainINA381A1-Q120V/V
INA381A2-Q150
INA381A3-Q1100
INA381A4-Q1200
EGGain errorVOUT = 0.5 V to VS – 0.5 V±0.1%±1%
Gain error driftTA= –40°C to +125°C1.520ppm/°C
Nonlinearity errorVOUT = 0.5 V to VS – 0.5 V±0.01%
Maximum capacitive loadNo sustained oscillation1nF
VOLTAGE OUTPUT
Swing to VS power-supply railRL = 10 kΩ to GND, TA= –40°C to +125°CVS – 0.02VS – 0.05V
Swing to GND(2)RL = 10 kΩ to GND, TA= –40°C to +125°CVGND + 0.0005VGND + 0.005V
FREQUENCY RESPONSE
BWBandwidthINA381A1-Q1350kHz
INA381A2-Q1210
INA381A3-Q1150
INA381A4-Q1105
SRSlew rate2V/µs
NOISE
Voltage noise density40nV/√ Hz
COMPARATOR
tpPropagation delay time, comparator onlyCMPIN Input overdrive = 20 mV 0.41µs
Large-signal propagation delay, comparator onlyCMPIN step = 0.5 V to 4.5, VCMPREF = 4 V 0.42
Small signal total alert propogation delay, comparator and amplifierInput overdrive = 1 mV 25
Slew rate limited total alert propagation delay, comparator and amplifierVOUT = 0.5 V to 4.5, VCMPREF = 4 V 310
VOSComparator offset voltage±1±5mV
HYSHysteresis50mV
VIHHigh-level input voltage1.46V
VILLow-level input voltage00.4V
VOLAlert low-level output voltageIOL = 3 mA70300mV
ALERT pin leakage input currentVOH = 3.3 V0.11μA
Digital leakage input current0 ≤ VIN ≤ VS1μA
POWER SUPPLY
IQQuiescent currentVSENSE = 10 mV, TA = +25°C 250350μA
TA = –40°C to +125°C  450
(1) RTI = referred-to-input.
(2) Swing specifications are tested with an overdriven input condition.