SBOS122E December   1999  – December 2017 INA138 , INA168

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 Output Voltage Range
      2. 7.3.2 Bandwidth
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Operation
    2. 8.2 Typical Applications
      1. 8.2.1 Buffering Output to Drive an ADC
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Selecting the Shunt Resistor and RL
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Output Filter
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curve
      3. 8.2.3 Offsetting the Output Voltage
      4. 8.2.4 Bipolar Current Measurement
      5. 8.2.5 Bipolar Current Measurement Using Differential Input of ADC
      6. 8.2.6 Multiplexed Measurement Using Logic Signal for Power
  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 Related Links
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted) (1)
MIN MAX UNIT
Voltage Supply, V+ INA138 –0.3 60 V
INA168 –0.3 75
Analog input, VIN+, VIN– INA138 Common mode(2) –0.3 60
Sense voltage, VSENSE = (VIN+ – VIN–) –40 2
INA168 Common mode(2) –0.3 75
Sense voltage, VSENSE = (VIN+ – VIN–) –40 2
Analog output, OUT pin(2) –0.3 40
Current Input current into any pin 10 mA
Temperature Operating, TA –55 150 °C
Junction, TJ 150
Storage, Tstg –65 150
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) The input voltage at any pin may exceed the voltage shown if the current at that pin is limited to 10 mA.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±1000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±500
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)
MIN NOM MAX UNIT
INA138
V+ Supply voltage 2.7 5 36 V
VSENSE Full-scale sense voltage (VIN+ – VIN–) 100 500 mV
Common-mode voltage 2.7 12 36 V
TA Operating temperature –40 25 125 °C
INA168
V+ Supply voltage 2.7 5 60 V
VSENSE Full-scale sense voltage (VIN+ – VIN–) 100 500 mV
Common-mode voltage 2.7 12 60 V
TA Operating temperature –40 25 125 °C

6.4 Thermal Information

THERMAL METRIC(1) INA1x8 UNIT
DBV
5 PINS
RθJA Junction-to-ambient thermal resistance 168.3 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 73.8 °C/W
RθJB Junction-to-board thermal resistance 28.1 °C/W
ψJT Junction-to-top characterization parameter 2.5 °C/W
ψJB Junction-to-board characterization parameter 27.6 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

6.5 Electrical Characteristics

all other characteristics at TA = +25°C, VS = 5 V, VIN+ = 12 V, and ROUT = 125 kΩ (unless otherwise noted)
PARAMETER TEST CONDITIONS INA1x8 UNIT
MIN TYP MAX
INPUT
Common-mode rejection VSENSE = 50 mV INA138, VIN+ = 2.7 V to 36 V 100 120 dB
INA168, VIN+ = 2.7 V to 60 V 100 120
Offset voltage(1) TA = 25°C ±0.2 ±1 mV
TA = –40°C to +125°C ±2
Offset voltage drift(1) TA = –40°C to +125°C 1 µV/°C
Offset voltage vs power supply, V+ VSENSE = 50 mV INA138, V+ = 2.7 V to 36 V 0.1 10 µV/V
INA168, V+ = 2.7 V to 60 V 0.1 10
Input bias current TA = 25°C 2 µA
TA = –40°C to +125°C, INA138 10
OUTPUT
Transconductance VSENSE = 10 mV to 150 mV, TA = 25°C 198 200 202 µA/V
VSENSE = 100 mV, TA = –40°C to +125°C 196 204 µA/V
Transconductance drift TA = –40°C to +125°C 10 nA/°C
Nonlinearity error VSENSE = 10 mV to 150 mV ±0.01% ±0.1%
Total output error VSENSE = 100 mV TA = 25°C ±0.5% ±2%
TA = –40°C to +125°C ±2.5%
Output impedance 1 || 5 GΩ || pF
Voltage output swing To power supply voltage, V+ (V+) – 0.8 (V+) – 1.0 V
To common-mode voltage, VCM VCM – 0.5 VCM – 0.8 V
FREQUENCY RESPONSE
Bandwidth ROUT = 5 kΩ 800 kHz
ROUT = 125 kΩ 32 kHz
Settling time To 0.1% 5-V step, ROUT = 5 kΩ 1.8 µs
5-V step, ROUT = 125 kΩ 30 µs
NOISE
Output-current noise density 9 pA/√Hz
Total output-current noise BW = 100 kHz 3 nA RMS
POWER SUPPLY
Quiescent current VSENSE = 0 V,
IO = 0 mA		 TA = 25°C 25 45 µA
TA = –40°C to +125°C 60 µA
(1) Defined as the amount of input voltage, VSENSE, to drive the output to zero.

6.6 Typical Characteristics

At TA = +25°C, V+ = 5 V, VIN+ = 12 V, and RL = 125 kΩ, unless otherwise noted.
INA138 INA168 graph_1_sbos122.gif
Figure 1. Gain vs Frequency
INA138 INA168 graph_3_sbos122.gif
Figure 3. Power-Supply Rejection vs Frequency
INA138 INA168 graph_5_sbos122.gif
Figure 5. Total Output Error vs Power-Supply Voltage
INA138 INA168 g_stepresp01_gls174.gif
Figure 7. Step Response
INA138 INA168 graph_2_sbos122.gif
Figure 2. Common-Mode Rejection vs Frequency
INA138 INA168 graph_4_sbos122.gif
Figure 4. Total Output Error vs VIN
INA138 INA168 graph_6_sbos122.gif
Figure 6. Quiescent Current vs Power-Supply Voltage
INA138 INA168 g_stepresp02_gls174.gif
Figure 8. Step Response