INA228AIDGST
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Texas Instruments INA228AIDGST

Manufacturer No:
INA228AIDGST
Manufacturer:
Texas Instruments
Package:
Tape & Reel (TR)
Description:
IC CURR SENSE 1 CIRCUIT 10VSSOP
Delivery:
Payment:
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iso45001
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Product Introduction

Overview

The INA228AIDGST from Texas Instruments is an ultra-precise digital power monitor designed for high-accuracy current-sensing applications. It features a 20-bit delta-sigma ADC and is capable of measuring current, bus voltage, temperature, power, energy, and charge accumulation. The device operates over a wide common-mode range of –0.3 V to +85 V and supports bus voltage sensing from 0 V to 85 V. Its high-resolution ADC and low offset and gain drift make it suitable for precise systems without the need for multi-temperature calibration during manufacturing.

Key Specifications

ParameterValueUnit
ADC Resolution20-bit
Offset Voltage±1 µV (maximum)µV
Offset Drift±0.01 µV/°C (maximum)µV/°C
Gain Error±0.05% (maximum)%
Gain Error Drift±20 ppm/°C (maximum)ppm/°C
Common Mode Rejection154 dB (minimum)dB
Power Monitoring Accuracy0.5% full scale, –40°C to +125°C (maximum)%
Energy and Charge Accuracy1.0% full scale (maximum)%
Alert Response Time75 µsµs
Shunt Full-Scale Differential Range±163.84 mV / ±40.96 mVmV
Input Bias Current2.5 nA (maximum)nA
Temperature Sensor Accuracy±1°C (maximum at 25°C)°C
Supply Voltage2.7 V to 5.5 VV
Operational Current640 µA (typical)µA
Shutdown Current5 µA (maximum)µA
I2C Interface Speed2.94 MHzMHz
I2C Addresses16 pin-selectable addresses

Key Features

  • High-resolution, 20-bit delta-sigma ADC for precise measurements.
  • Low offset voltage (±1 µV maximum) and low gain drift (±0.01 µV/°C maximum) for accurate current sensing.
  • Wide common-mode range of –0.3 V to +85 V and bus voltage sense input from 0 V to 85 V.
  • Fast alert response time of 75 µs.
  • Programmable conversion time (50 µs to 4.12 ms) and sample averaging (1x to 1024x) to reduce noise.
  • Integrated temperature sensor with ±1°C accuracy at 25°C.
  • Programmable resistor temperature compensation.
  • High-speed I2C interface with 16 pin-selectable addresses.
  • Low input bias current (2.5 nA maximum) allowing for larger current-sense resistors.

Applications

  • DC/DC converters and power inverters.
  • Industrial battery packs.
  • Power-over-ethernet (PoE) systems.
  • Telecom equipment.
  • Enterprise servers.

Q & A

  1. What is the resolution of the ADC in the INA228?
    The INA228 features a high-resolution 20-bit delta-sigma ADC.
  2. What is the offset voltage of the INA228?
    The offset voltage is ±1 µV (maximum).
  3. What is the common-mode range of the INA228?
    The common-mode range is –0.3 V to +85 V.
  4. How fast is the alert response time of the INA228?
    The alert response time is 75 µs.
  5. What is the range of the supply voltage for the INA228?
    The supply voltage range is 2.7 V to 5.5 V.
  6. What is the typical operational current of the INA228?
    The typical operational current is 640 µA.
  7. How many I2C addresses are selectable on the INA228?
    There are 16 pin-selectable I2C addresses.
  8. What is the accuracy of the integrated temperature sensor?
    The temperature sensor is accurate to ±1°C at 25°C.
  9. Can the conversion time and averaging be programmed on the INA228?
    Yes, the conversion time can be set from 50 µs to 4.12 ms, and sample averaging can be set from 1x to 1024x.
  10. What are some typical applications of the INA228?
    The INA228 is used in DC/DC converters, industrial battery packs, Power-over-ethernet (PoE) systems, telecom equipment, and enterprise servers.

Product Attributes

Amplifier Type:Current Sense
Number of Circuits:1
Output Type:- 
Slew Rate:- 
Gain Bandwidth Product:- 
-3db Bandwidth:- 
Current - Input Bias:100 nA
Voltage - Input Offset:- 
Current - Supply:640µA
Current - Output / Channel:- 
Voltage - Supply Span (Min):2.7 V
Voltage - Supply Span (Max):5.5 V
Operating Temperature:-40°C ~ 125°C (TA)
Mounting Type:Surface Mount
Package / Case:10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Supplier Device Package:10-VSSOP
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Similar Products

Part Number INA228AIDGST INA238AIDGST INA229AIDGST INA228AIDGSR
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Product Status Active Active Active Active
Amplifier Type Current Sense Current Sense Current Sense Current Sense
Number of Circuits 1 1 1 1
Output Type - - - -
Slew Rate - - - -
Gain Bandwidth Product - - - -
-3db Bandwidth - - - -
Current - Input Bias 100 nA 100 nA 100 nA 100 nA
Voltage - Input Offset - 1.5 µV 1 mV -
Current - Supply 640µA 640µA 640µA 640µA
Current - Output / Channel - - - -
Voltage - Supply Span (Min) 2.7 V 2.7 V 2.7 V 2.7 V
Voltage - Supply Span (Max) 5.5 V 5.5 V 5.5 V 5.5 V
Operating Temperature -40°C ~ 125°C (TA) -40°C ~ 125°C -40°C ~ 125°C (TA) -40°C ~ 125°C (TA)
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Supplier Device Package 10-VSSOP 10-VSSOP 10-VSSOP 10-VSSOP

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