Product details

Common mode voltage (Max) (V) 85 Common mode voltage (Min) (V) -0.3 Input offset (+/-) (Max) (uV) 1 Input offset drift (+/-) (Typ) (uV/C) 0.002 Gain (V/V) 1 Gain error (%) 0.05 Gain error drift (+/-) (Max) (ppm/°C) 20 CMRR (Min) (dB) 154 Bandwidth (kHz) 10 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 1.1 Digital interface SPI Features Alert Function, Bi-directional, Integrated Power Accumulator, Integrated Power Monitor, Low-side Capable, Ultra precise Resolution (Bits) 20 TI functional safety category Functional Safety-Capable Rating Automotive Operating temperature range (C) -40 to 125
Common mode voltage (Max) (V) 85 Common mode voltage (Min) (V) -0.3 Input offset (+/-) (Max) (uV) 1 Input offset drift (+/-) (Typ) (uV/C) 0.002 Gain (V/V) 1 Gain error (%) 0.05 Gain error drift (+/-) (Max) (ppm/°C) 20 CMRR (Min) (dB) 154 Bandwidth (kHz) 10 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 1.1 Digital interface SPI Features Alert Function, Bi-directional, Integrated Power Accumulator, Integrated Power Monitor, Low-side Capable, Ultra precise Resolution (Bits) 20 TI functional safety category Functional Safety-Capable Rating Automotive Operating temperature range (C) -40 to 125
VSSOP (DGS) 10 9 mm² 3 x 3
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • High-resolution, 20-bit delta-sigma ADC
  • Current monitoring accuracy:
    • Offset voltage: ±1 µV (maximum)
    • Offset drift: ±0.01 µV/°C (maximum)
    • Gain error: ±0.05% (maximum)
    • Gain error drift: ±20 ppm/°C (maximum)
    • Common mode rejection: 154 dB (minimum)
  • Power monitoring accuracy:
    • 0.5% full scale, –40°C to +125°C (maximum)
  • Energy and charge accuracy:
    • 1.0% full scale (maximum)
  • Fast alert response: 75 µs
  • Wide common-mode range: –0.3 V to +85 V
  • Bus voltage sense input: 0 V to 85 V
  • Shunt full-scale differential range: ±163.84 mV / ±40.96 mV
  • Input bias current: 2.5 nA (maximum)
  • Temperature sensor: ±1°C (maximum at 25°C)
  • Programmable resistor temperature compensation
  • Programmable conversion time and averaging
  • 10-MHz SPI communication interface
  • Operates from a 2.7-V to 5.5-V supply:
    • Operational current: 640 µA (typical)
    • Shutdown current: 5 µA (maximum)
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • High-resolution, 20-bit delta-sigma ADC
  • Current monitoring accuracy:
    • Offset voltage: ±1 µV (maximum)
    • Offset drift: ±0.01 µV/°C (maximum)
    • Gain error: ±0.05% (maximum)
    • Gain error drift: ±20 ppm/°C (maximum)
    • Common mode rejection: 154 dB (minimum)
  • Power monitoring accuracy:
    • 0.5% full scale, –40°C to +125°C (maximum)
  • Energy and charge accuracy:
    • 1.0% full scale (maximum)
  • Fast alert response: 75 µs
  • Wide common-mode range: –0.3 V to +85 V
  • Bus voltage sense input: 0 V to 85 V
  • Shunt full-scale differential range: ±163.84 mV / ±40.96 mV
  • Input bias current: 2.5 nA (maximum)
  • Temperature sensor: ±1°C (maximum at 25°C)
  • Programmable resistor temperature compensation
  • Programmable conversion time and averaging
  • 10-MHz SPI communication interface
  • Operates from a 2.7-V to 5.5-V supply:
    • Operational current: 640 µA (typical)
    • Shutdown current: 5 µA (maximum)

The INA229-Q1 is an ultra-precise digital power monitor with a 20-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure a full-scale differential input of ±163.84 mV or ±40.96 mV across a resistive shunt sense element with common-mode voltage support from –0.3 V to +85 V.

The INA229-Q1 reports current, bus voltage, temperature, power, energy and charge accumulation while employing a precision ±0.5% integrated oscillator, all while performing the needed calculations in the background. The integrated temperature sensor is ±1°C accurate for die temperature measurement and is useful in monitoring the system ambient temperature.

The low offset and gain drift design of the INA229-Q1 allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing. Further, the very low offset voltage and noise allow for use in mA to kA sensing applications and provide a wide dynamic range without significant power dissipation losses on the sensing shunt element. The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the micro-amp range.

The device allows for selectable ADC conversion times from 50 µs to 4.12 ms as well as sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data.

The INA229-Q1 is an ultra-precise digital power monitor with a 20-bit delta-sigma ADC specifically designed for current-sensing applications. The device can measure a full-scale differential input of ±163.84 mV or ±40.96 mV across a resistive shunt sense element with common-mode voltage support from –0.3 V to +85 V.

The INA229-Q1 reports current, bus voltage, temperature, power, energy and charge accumulation while employing a precision ±0.5% integrated oscillator, all while performing the needed calculations in the background. The integrated temperature sensor is ±1°C accurate for die temperature measurement and is useful in monitoring the system ambient temperature.

The low offset and gain drift design of the INA229-Q1 allows the device to be used in precise systems that do not undergo multi-temperature calibration during manufacturing. Further, the very low offset voltage and noise allow for use in mA to kA sensing applications and provide a wide dynamic range without significant power dissipation losses on the sensing shunt element. The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the micro-amp range.

The device allows for selectable ADC conversion times from 50 µs to 4.12 ms as well as sample averaging from 1x to 1024x, which further helps reduce the noise of the measured data.

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NEW INA239-Q1 ACTIVE AEC-Q100, 85-V, 16-bit, high-precision, SPI output current/voltage/power monitor The INA239 has reduced accuracy and functionality at a lower price
Same functionality with different pin-out to the compared device.
NEW INA228-Q1 ACTIVE AEC-Q100, 85-V, 20-bit, ultraprecise, I²C output current/voltage/power/energy/charge monitor The INA228 has the same functionality and performance but with an I2C interface

Design & development

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Evaluation board

INA229_239EVM — INA229 & INA239 evaluation module

This evaluation module (EVM) is an easy-to-use platform for evaluating the main features and performance of the INA229 or INA239.

The EVM supports current measurements up to 10-amps and comes with graphical user interface (GUI) support for reading and writing to device registers.
IDE, configuration, compiler or debugger

ASC-STUDIO — Analog signal chain (ASC) studio

To help simplify configuration challenges and accelerate software development, we created ASC studio, an intuitive graphical utility for configuring all aspects of TI sensors and in the future other signal chain components.  ASC studio helps you select configuration parameters visually so that (...)
Simulation tool

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TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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Power Monitor Tool

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