26V, programmable-gain current sense amplifier & analog power monitor
Product details
Parameters
Package | Pins | Size
Features
- Wide Common-Mode Range: 0 V to 26 V
- ±100 µV Offset (Max, Gain = 300 V/V)
- Accuracy
- ±0.25% Shunt Voltage Gain Error (Max)
- ±0.15% Bus Voltage Gain Error (Max)
- 1.25% Power Error (Max)
- 0.3 µV/°C Offset Drift (Max)
- 50 ppm/°C Gain Drift (Max)
- Programmable Gains
- Current Shunt Voltage Gains: 20, 128, 300
- Bus Voltage Attenuations: 1/10, 1/5, 2/5
- Monitors/Measures/Reports:
- Instantaneous Power
- Bus Voltage
- Load Current
- Quiescent Current: 250 µA (Max)
- Shutdown Current: 1 µA (Max)
Description
The INA223 is a voltage-output device that monitors the current, bus voltage, and power of a supply line by sensing a voltage drop across a shunt at common-mode voltages from 0 V to 26 V. The common-mode voltage range is independent of the supply voltage. The low offset of the Zerø-Drift architecture enables current sensing with maximum drops across the shunt as low as 10 mV, full-scale.
The INA223 includes a two-wire interface used for adjusting the configuration settings of the device. The interface is used to control the signal (current shunt voltage, bus voltage, or power) that is directed to the device output. Multiple gain and attenuation settings can be programmed through the two-wire interface to allow for application-specific configurations. The programmable gain feature also allows the device to be operated over a much wider dynamic current load range without having to switch the sensing element used.
A shutdown feature is available to disable the device and effectively disconnect it from the shunt resistor and supply voltage, thus reducing the drain on the battery.
The INA223 operates from a single +2.7-V to +5.5-V supply, drawing a maximum supply current of 250 µA. It is specified over the extended temperature range of –40°C to +105°C, and is offered in an SON-10 package.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | Analog Output Current Shunt and Voltage Instantaneous Power Monitor datasheet | Jun. 13, 2012 |
Technical articles | How current-sense amplifiers monitor satellite health | Feb. 08, 2021 | |
Technical articles | A key to accurate system thermal management: monitoring both current flow and temperature | Oct. 04, 2018 | |
Technical articles | System trade-offs for high- and low-side current measurements | Jun. 01, 2017 | |
Application note | Energy and Power Monitoring with Digital Current Sensors | May 25, 2017 | |
Technical articles | Why should you care about overcurrent protection in your system? | Jun. 16, 2016 | |
Application note | Understanding the I2C Bus | Jun. 30, 2015 | |
User guide | INA223EVM User's Guide | Jun. 11, 2012 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The INA223EVM is a platform for evaluating the performance of the INA223 under various signal, shunt, and supply conditions.
Features
Software development
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Additionally, an external protection circuit is implemented to provide surge and fast-transient protection and demonstrate the different immunity levels to (...)
Design files
-
download TIDA-00302 BOM.pdf (52KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SON (DSK) | 10 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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