Texas Instruments INA190/INA190-Q1 Current-Shunt Monitors
Texas Instruments INA190/INA190-Q1 Current-Shunt Monitors provide overcurrent protection and precision current measurement for system optimization or in closed-loop feedback circuits. These voltage-output monitors can sense drops across shunts at common-mode voltages from –0.2V to +40V, independent of the supply voltage. The INA190/INA190-Q1 features five fixed gain options of 25V/V, 50V/V, 100V/V, 200V/V, or 500V/V. The INA190/INA190-Q1 offers a low input bias current, permitting the use of larger current-sense resistors. This allows accurate, current measurements in the microamp range.
The dynamic range of the current measurement is extending by using the low offset voltage in the zero-drift architecture enabling smaller sense resistors with lower power loss. The INA190/INA190-Q1 Monitors operate from a single 1.7V to 5.5V power supply and draw a maximum of 65µA of supply current when enabled, with only 0.1µA when disabled. Additional features include an extended operating temperature range of –40°C to +125°C and a low offset voltage of ±15µV (Max). The INA190-EP devices have gold bond wires, a temperature range of –55 to +105°C, and an SnPb lead finish. The INA190-Q1 devices are AEC-Q100 qualified for automotive applications.
Features
- Low supply voltage, VVS of 1.7V to 5.5V
- Wide common-mode voltage of –0.2V to +40V
- Low shutdown current of 100nA (Max)
- Low input bias currents of 500pA (Typ) (Enables microamp current measurement)
- Low offset voltage, VOS of ±15µV (Max)
- Accuracy:
- Gain error of ±0.2% (A1 Devices)
- Offset drift of 0.13µV/°C (Max)
- Gain drift of 5ppm/°C (Max)
- Gain options:
- INA190A1: 25V/V
- INA190A2: 50 V/V
- INA190A3: 100V/V
- INA190A4: 200V/V
- INA190A5: 500V/V
- Quiescent current of 50µA at 25°C (Typ)
- 1.8mm x 1.4mm UQFN-10 Package
Applications
- Notebook computers
- Cell phones
- Battery-powered devices
- Telecom equipment
- Power management
- Battery chargers
Datasheets
Functional Diagram
Development Tools
Texas Instruments INA190EPEVM Evaluation Module (EVM)
Helps users quickly test the various versions of the INA190-EP, a precise current sense amplifier.
Texas Instruments INA190EVM Current Sensing Evaluation Module
Small module with 6 completely independent boards that can be broken off by the user.