INA234 Series
28-V, 12-bit, I²C output current/voltage/power monitor with alert in WCSP
Manufacturer: Texas Instruments
Catalog
28-V, 12-bit, I²C output current/voltage/power monitor with alert in WCSP
Key Features
• High-side or low-side current sensingOperates from a 1.7-V to 5.5-V power supplyReports current, voltage and powerProgrammable full scale range: 20mV / 80mVInput common mode range: –0.3 V to 28 VCurrent monitoring accuracy:12-bit ADC resolution0.5% gain error (maximum)100-µV offset (maximum)Low input bias current: 10 nA (maximum)Configurable averaging optionsGeneral call addressing allows conversion synchronization among devicesAlert limits for over and under current events1.2-V compliant I 2C, SMBus interfaceTwo device address options with a 4-pin selectable addressDSBGA-8 Package (0.745 mm × 1.508 mm)Operating temperature: –40°C and +125°CHigh-side or low-side current sensingOperates from a 1.7-V to 5.5-V power supplyReports current, voltage and powerProgrammable full scale range: 20mV / 80mVInput common mode range: –0.3 V to 28 VCurrent monitoring accuracy:12-bit ADC resolution0.5% gain error (maximum)100-µV offset (maximum)Low input bias current: 10 nA (maximum)Configurable averaging optionsGeneral call addressing allows conversion synchronization among devicesAlert limits for over and under current events1.2-V compliant I 2C, SMBus interfaceTwo device address options with a 4-pin selectable addressDSBGA-8 Package (0.745 mm × 1.508 mm)Operating temperature: –40°C and +125°C
Description
AI
The INA234 device is a 12-bit digital current monitor with an I 2C/SMBus-compatible interface that is compliant with a wide range of digital bus voltages such as 1.2 V, 1.8 V, 3.3 V, and 5.0 V. The device monitors the voltage across an external sense resistor and reports values for current, bus voltage, and power.
The INA234 features programmable ADC conversion times and averaging. The device also has a programmable calibration value with an internal multiplier that enables direct readouts of current in amperes and power in watts. The device monitors the bus voltage present on the IN– pin and can alert on overcurent and undercurrent conditions as well as overvoltage and undervoltage conditions. High input impedance while in current measurement mode allows use of larger current sense resistors needed to measure small value system currents.
The INA234 senses current on common-mode bus voltages that can vary from –0.3 V to 28 V, independent of the supply voltage. The device operates from a single 1.7-V to 5.5-V supply, drawing a typical supply current of 300 µA in normal operation. The device can be placed in a low-power standby mode where the typical operating current is 2.2 µA.
The INA234 device is a 12-bit digital current monitor with an I 2C/SMBus-compatible interface that is compliant with a wide range of digital bus voltages such as 1.2 V, 1.8 V, 3.3 V, and 5.0 V. The device monitors the voltage across an external sense resistor and reports values for current, bus voltage, and power.
The INA234 features programmable ADC conversion times and averaging. The device also has a programmable calibration value with an internal multiplier that enables direct readouts of current in amperes and power in watts. The device monitors the bus voltage present on the IN– pin and can alert on overcurent and undercurrent conditions as well as overvoltage and undervoltage conditions. High input impedance while in current measurement mode allows use of larger current sense resistors needed to measure small value system currents.
The INA234 senses current on common-mode bus voltages that can vary from –0.3 V to 28 V, independent of the supply voltage. The device operates from a single 1.7-V to 5.5-V supply, drawing a typical supply current of 300 µA in normal operation. The device can be placed in a low-power standby mode where the typical operating current is 2.2 µA.
