SBOS743A July   2015  – May 2020 INA226-Q1

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      High-Side or Low-Side Sensing 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 Basic ADC Functions
        1. 7.3.1.1 Power Calculation
        2. 7.3.1.2 Alert Pin
    4. 7.4 Device Functional Modes
      1. 7.4.1 Averaging and Conversion Time Considerations
      2. 7.4.2 Filtering and Input Considerations
    5. 7.5 Programming
      1. 7.5.1 Programming the Calibration Register
      2. 7.5.2 Programming the Power Measurement Engine
        1. 7.5.2.1 Calibration Register and Scaling
      3. 7.5.3 Simple Current Shunt Monitor Usage (No Programming Necessary)
      4. 7.5.4 Default Settings
      5. 7.5.5 Bus Overview
        1. 7.5.5.1 Serial Bus Address
        2. 7.5.5.2 Serial Interface
        3. 7.5.5.3 Writing to and Reading from the INA226-Q1
          1. 7.5.5.3.1 High-Speed I2C Mode
        4. 7.5.5.4 SMBus Alert Response
    6. 7.6 Register Maps
      1. Table 4. Register Set Summary
      2. 7.6.1    Configuration Register (00h) (Read/Write)
        1. Table 5. Configuration Register (00h) (Read/Write) Descriptions
      3. 7.6.2    Shunt Voltage Register (01h) (Read-Only)
        1. Table 10. Shunt Voltage Register (01h) (Read-Only) Description
      4. 7.6.3    Bus Voltage Register (02h) (Read-Only)
        1. Table 11. Bus Voltage Register (02h) (Read-Only) Description
      5. 7.6.4    Power Register (03h) (Read-Only)
        1. Table 12. Power Register (03h) (Read-Only) Description
      6. 7.6.5    Current Register (04h) (Read-Only)
        1. Table 13. Current Register (04h) (Read-Only) Register Description
      7. 7.6.6    Calibration Register (05h) (Read/Write)
        1. Table 14. Calibration Register (05h) (Read/Write) Description
      8. 7.6.7    Mask/Enable Register (06h) (Read/Write)
        1. Table 15. Mask/Enable Register (06h) (Read/Write)
      9. 7.6.8    Alert Limit Register (07h) (Read/Write)
        1. Table 16. Alert Limit Register (07h) (Read/Write) Description
      10. 7.6.9    Manufacturer ID Register (FEh) (Read-Only)
        1. Table 17. Manufacturer ID Register (FEh) (Read-Only) Description
      11. 7.6.10   Die ID Register (FFh) (Read-Only)
        1. Table 18. Die ID Register (FFh) (Read-Only) Description
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 High-Side Sensing Circuit Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
          1. Table 19. Configuration Register (00h) Settings for (Value = 4025h)
          2. Table 20. Configuration Register (00h) Settings for (Value = 4005h)
          3. Table 21. Mask/Enable Register (06h) Settings for and (Value = 8000h)
          4. Table 22. Alert Limit Register (07h) Settings for and (Value = 7D00)
  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 Device Support
      1. 11.1.1 Development Support
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

6.5 Electrical Characteristics

TA = 25°C, VVS = 3.3 V, VIN+ = 12 V, VSENSE = (VIN+ – VIN–) = 0 mV and VVBUS = 12 V, unless otherwise noted
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT
Shunt voltage input range –81.9175 81.92 mV
Bus voltage input range(1) 0 36 V
CMRR Common-mode rejection 0 V ≤ VIN+ ≤ 36 V 126 140 dB
VOS Shunt offset voltage, RTI(2) ±2.5 ±10 μV
Shunt offset voltage, RTI(2) vs temperature –40°C ≤ TA ≤ 125°C 0.02 0.1 μV/°C
PSRR Shunt offset voltage, RTI(2) vs Power supply 2.7 V ≤ VS ≤ 5.5 V 2.5 μV/V
VOS Bus offset voltage, RTI(2) ±1.25 ±7.5 mV
Bus offset voltage, RTI(2) vs temperature –40°C ≤ TA ≤ 125°C 10 40 μV/°C
PSRR Bus offset voltage, RTI(2) vs power supply 0.5 mV/V
IB Input bias current (IIN+, IIN– pins) 10 μA
VBUS input impedance 830 kΩ
Input leakage (3) (IN+ pin) + (IN– pin),
Power-down mode		 0.1 0.5 μA
DC ACCURACY
ADC native resolution 16 Bits
1 LSB step size Shunt voltage 2.5 μV
Bus voltage 1.25 mV
Shunt voltage gain error 0.02% 0.1%
Shunt voltage gain error vs temperature –40°C ≤ TA ≤ 125°C 10 50 ppm/°C
Bus voltage gain error 0.02% 0.1%
Bus voltage gain error vs temperature –40°C ≤ TA ≤ 125°C 10 50 ppm/°C
Differential nonlinearity ±0.1 LSB
tCT ADC conversion time CT bit = 000 140 154 μs
CT bit = 001 204 224
CT bit = 010 332 365
CT bit = 011 588 646
CT bit = 100 1.1 1.21 ms
CT bit = 101 2.116 2.328
CT bit = 110 4.156 4.572
CT bit = 111 8.244 9.068
SMBus
SMBus timeout(4) 28 35 ms
DIGITAL INPUT/OUTPUT
Input capacitance 3 pF
Leakage input current 0 V ≤ VSCL ≤ VVS ,
0 V ≤ VSDA ≤ VVS,
0 V ≤ VAlert ≤ VVS ,
0 V ≤ VA0 ≤ VVS ,
0 V ≤ VA1 ≤ VVS 		0.1 1 μA
VIH High-level input voltage 0.7×VVS 6 V
VIL Low-level input voltage –0.5 0.3×VVS V
VOL Low-level output voltage, SDA, Alert IOL = 3 mA 0 0.4 V
Hysteresis 500 mV
POWER SUPPLY
Operating supply range 2.7 5.5 V
IQ Quiescent current 330 420 μA
Quiescent current, power-down (shutdown) mode 0.5 2 μA
VPOR Power-on reset threshold 2 V
(1) While the input range is 36 V, the full-scale range of the ADC scaling is 40.96 V. See the Basic ADC Functions section. Do not apply more than 36 V.
(2) RTI = Referred-to-input.
(3) Input leakage is positive (current flowing into the pin) for the conditions shown at the top of this table. Negative leakage currents can occur under different input conditions.
(4) SMBus timeout in the INA226-Q1 resets the interface any time SCL is low for more than 28 ms.