SBOSA29A June   2020  – November 2023 INA281

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Amplifier Input Common-Mode Signal
        1. 6.3.1.1 Input-Signal Bandwidth
        2. 6.3.1.2 Low Input Bias Current
        3. 6.3.1.3 Low VSENSE Operation
        4. 6.3.1.4 Wide Fixed Gain Output
        5. 6.3.1.5 Wide Supply Range
    4. 6.4 Device Functional Modes
      1. 6.4.1 Unidirectional Operation
      2. 6.4.2 High Signal Throughput
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 RSENSE and Device Gain Selection
      2. 7.1.2 Input Filtering
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Overload Recovery With Negative VSENSE
      3. 7.2.3 Application Curve
  9. 8 Power Supply Recommendations
  10. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

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

5.5 Electrical Characteristics

at TA = 25 °C, VS = 5 V, VSENSE = VIN+ – VIN– = 0.5 V / Gain, VCM = VIN– = 48 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT
VCM Common-mode input range(1) TA = –40 °C to +125 °C –4 110 V
CMRR Common-mode rejection ratio, input referred –4 V ≤ VCM ≤ 110 V, TA = –40 °C to +125 °C 120 140 dB
f = 50 kHz 65 dB
Vos Offset voltage, input referred INA281x1 ±100 ±500 µV
INA281x2 ±55 ±300
INA281x3 ±30 ±250
INA281x4 ±30 ±200
INA281x5 ±15 ±150
dVos/dT Offset voltage drift TA = –40 ℃ to +125 ℃ ±0.1 ±1 µV/℃
PSRR Power supply rejection ratio, input referred 2.7 V ≤ VS ≤ 20 V,
TA = –40 °C to +125 °C		 ±1.5 ±10 µV/V
IB Input bias current IB+, VSENSE = 0 V 10 20 30 uA
IB–, VSENSE = 0 V 10 20 30 uA
OUTPUT
G Gain INA281x1 20 V/V
INA281x2 50 V/V
INA281x3 100 V/V
INA281x4 200 V/V
INA281x5 500 V/V
GERR Gain error GND + 50 mV ≤ VOUT ≤ VS – 200 mV ±0.07 ±0.5 %
TA = –40 °C to +125 °C ±2 ±20 ppm/°C
NLERR Nonlinearity error 0.01 %
Maximum capacitive load No sustained oscillations, no isolation resistor 500 pF
VOLTAGE OUTPUT
Swing to Vs (Power supply rail) RLOAD = 10 kΩ, TA = –40 °C to +125 °C VS – 0.07 VS – 0.15 V
Swing to ground RLOAD = 10 kΩ, VSENSE = 0 V,               TA = –40 °C to +125 °C 0.005 0.02 V
FREQUENCY RESPONSE
BW Bandwidth INA281x1, CLOAD = 5 pF,
VSENSE = 200 mV		 1300 kHz
INA281x2, CLOAD = 5 pF,
VSENSE = 80 mV		 1300
INA281x3, CLOAD = 5 pF,
VSENSE = 40 mV		 1000
INA281x4, CLOAD = 5 pF,
VSENSE = 20 mV		 900
INA281x5, CLOAD = 5 pF,
VSENSE = 8 mV		 900
SR Slew rate Rising edge 2.5 V/µs
Settling time VOUT = 4 V ± 0.1 V step, Output settles to 0.5% 10 µs
VOUT = 4 V ± 0.1 V step, Output settles to 1% 5
VOUT = 4 V ± 0.1 V step, Output settles to 5% 1
NOISE
Ven Voltage noise density 50 nV/√Hz
POWER SUPPLY
Vs Supply voltage TA = –40 °C to +125 °C 2.7 20 V
IQ Quiescent current 1.5 2 mA
TA = –40 °C to +125 °C 2.25 mA
(1) Common-mode voltage at both VIN+ and VIN- must not exceed the specified common-mode input range.