Texas Instruments INA199/INA199-Q1 Current Shunt Monitors
Texas Instruments INA199/INA199-Q1 Voltage Output Current Shunt Monitors are commonly used for overcurrent protection, precision current measurement for system optimization, or in closed-loop feedback circuits. These devices can sense drops across shunt resistors at common-mode voltages from –0.3V to 26V, independent of the supply voltage. The INA199/INA199-Q1 comes in three fixed gains (50V/V, 100V/V, and 200V/V). The low offset of the zero-drift architecture enables current sensing with maximum drops across the shunt as low as 10mV full-scale. These devices can operate from a single 2.7V to 26V power supply, drawing a maximum of 100µA of supply current. All versions are specified from –40°C to 105°C and are offered in both SC70-6 and thin UQFN-10 packages. The INA199-Q1 devices are AEC-Q100 qualified for automotive applications.
Features
- –0.3V to 26V wide common-mode range
- Offset voltage of ±150 µV (max.) (enables shunt drops of 10mV full-scale)
- Accuracy
- Gain Error (Maximum Over Temperature):
- ±1% (C version)
- ±1.5% (A and B versions)
- 0.5µV/°C offset drift (max.)
- 10ppm/°C gain drift (max.)
- Gain Error (Maximum Over Temperature):
- Choice of gains
- INA199x1: 50V/V
- INA199x2: 100V/V
- INA199x3: 200V/V
- Quiescent current of 100µA (max.)
- 6-pin SC-70, 10-pin UQFN packages
Applications
- Notebook computers
- Cell phones
- Qi-compliant wireless charging transmitters
- Telecom equipment
- Power management
- Battery chargers
Simplified Schematic
Đã phát hành: 2010-05-19
| Đã cập nhật: 2025-02-10