Overview
The INA139QPWRG4Q1 is a high-side, unipolar current shunt monitor produced by Texas Instruments. This device is designed for accurate current measurement in a variety of applications, including automotive, industrial, and consumer electronics. It features a wide input common-mode voltage range, high-speed operation, and low quiescent current, making it suitable for use in systems requiring precise current monitoring.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage Range (V+) | 2.7 | 40 | V | |
| Common-Mode Input Range (VIN+) | 2.7 | 40 | V | |
| Full-Scale Sense Voltage (VSENSE) | 100 | 500 | mV | |
| Offset Voltage (RTI) | ±0.2 | ±2 | mV | |
| Transconductance | 980 | 1000 | 1020 | μA/V |
| Quiescent Current | 60 | 125 | μA | |
| Operating Temperature Range | -40 | 125 | °C | |
| Bandwidth (ROUT = 10 kΩ) | 440 | kHz |
Key Features
- Qualified for automotive applications
- ESD protection exceeds 2000 V per MIL-STD-883, Method 3015; exceeds 200 V using machine model (C = 200 pF, R = 0)
- Complete unipolar high-side current measurement circuit
- Wide supply and common-mode ranges (2.7 V to 40 V)
- Independent supply and input common-mode voltages
- Single resistor gain set
- Low quiescent current (60 μA typical)
- Wide temperature range: -40°C to +125°C
- TSSOP-8 package
Applications
- Current shunt measurement in automotive, telephone, and computer systems
- Portable and battery-backup systems
- Battery chargers
- Power management systems
- Cell phones and other mobile devices
- Precision current sources
Q & A
- What is the primary function of the INA139QPWRG4Q1?
The INA139QPWRG4Q1 is a high-side, unipolar current shunt monitor designed for accurate current measurement.
- What is the operating temperature range of the INA139QPWRG4Q1?
The operating temperature range is -40°C to +125°C.
- What is the typical quiescent current of the INA139QPWRG4Q1?
The typical quiescent current is 60 μA.
- What is the maximum differential input voltage for accurate measurements?
The maximum differential input voltage for accurate measurements is 0.5 V, although it can handle up to 2 V without damage.
- How is the output voltage of the INA139QPWRG4Q1 generated?
The output voltage is generated by converting the output current with an external load resistor (RL).
- What are the common applications of the INA139QPWRG4Q1?
Common applications include current shunt measurement in automotive, telephone, and computer systems, as well as in portable and battery-backup systems, battery chargers, power management systems, and cell phones.
- What is the bandwidth of the INA139QPWRG4Q1 when using a 10 kΩ load resistor?
The bandwidth is approximately 440 kHz when using a 10 kΩ load resistor.
- Does the INA139QPWRG4Q1 require power-supply bypass capacitors for stability?
No, the INA139QPWRG4Q1 does not require power-supply bypass capacitors for stability, although they may be necessary in applications with noisy or high-impedance power supplies.
- How is the gain of the INA139QPWRG4Q1 set?
The gain is set using a single external resistor (RL).
- What is the package type of the INA139QPWRG4Q1?
The package type is TSSOP-8.
