SBOS848B December   2017  – October 2019 INA381

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin 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

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DGS|10
  • DSG|8
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)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT
CMRR Common-mode rejection ratio, RTI(1) VIN+ = 0 V to 26 V, TA= –40ºC to +125ºC 84 100 dB
VOS Offset voltage, RTI(1) VIN+ = 12 V, VIN– = 12 V ±100 ±500 μV
VIN+ = 0 V, VIN– = 0 V ±25 ±150
dVOS/dT Offset voltage drift, RTI(1) TA= –40ºC to +125ºC 0.1 1 μV/°C
PSRR Power-supply rejection ratio VS = 2.7 V to 5.5 V, TA= –40ºC to +125ºC ±8 ±40 μV/V
IB Input bias current VSENSE = 0 mV, IB+, IB– 80 μA
IOS Input offset current VSENSE = 0 mV ±0.05 μA
OUTPUT
G Gain INA381A1 20 V/V
INA381A2 50
INA381A3 100
INA381A4 200
EG Gain error VOUT = 0.5 V to VS – 0.5 V ±0.1% ±1%
Gain error drift TA= –40ºC to +125ºC 1.5 20 ppm/°C
Nonlinearity error VOUT= 0.5 V to VS – 0.5 V ±0.01%
Maximum capacitive load No sustained oscillation 1 nF
VOLTAGE OUTPUT
Swing to VS power-supply rail RL = 10 kΩ to GND, TA= –40ºC to +125ºC VS – 0.02 VS – 0.05 V
Swing to GND(2) RL = 10 kΩ to GND, TA= –40ºC to +125ºC VGND + 0.0005 VGND + 0.005 V
FREQUENCY RESPONSE
BW Bandwidth INA381A1 350 kHz
INA381A2 210
INA381A3 150
INA381A4 105
SR Slew rate 2 V/µs
NOISE
Voltage noise density 40 nV/√Hz
COMPARATOR
tp Propagation delay time, comparator only CMPIN Input overdrive = 20 mV 0.4 1 µs
Large-signal propagation delay, comparator only CMPIN step = 0.5 V to 4.5, VCMPREF = 4 V 0.4 2
Small-signal total alert propogation delay, comparator and amplifier Input overdrive = 1 mV 2 5
Slew rate limited total alert propagation delay, comparator and amplifier VOUT = 0.5 V to 4.5, VCMPREF = 4 V 3 10
VOS Comparator offset voltage ±1 ±5 mV
HYS Hysteresis 50 mV
VIH High-level input voltage 1.4 6 V
VIL Low-level input voltage 0 0.4 V
VOL Alert low-level output voltage IOL = 3 mA 70 300 mV
ALERT pin leakage input current VOH = 3.3 V 0.1 1 μA
Digital leakage input current 0 ≤ VIN ≤ VS 1 μA
POWER SUPPLY
IQ Quiescent current VSENSE = 10 mV, TA = +25ºC 250 350 μA
TA = –40ºC to +125ºC 450
(1) RTI = referred-to-input.
(2) Swing specifications are tested with an overdriven input condition.