Overview
The INA170EA/250, produced by Texas Instruments, is a high-side, bidirectional current shunt monitor. This device is designed to measure current in a wide range of applications, including automotive, telephone, computers, power systems, and general instrumentation. It features a wide input common-mode voltage range, low quiescent current, and a compact MSOP-8 package. The INA170 allows for bidirectional current measurement using a single supply, making it versatile for various power management and monitoring tasks.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Supply Voltage, V+ to GND | -0.3 | 40 | V | |
| Analog Inputs, Common Mode | -0.3 | 75 | V | |
| Differential Input Voltage (VIN+ - VIN-) | -40 | 2 | V | |
| Input Bias Current | 10 | µA | ||
| Operating Temperature | -55 | 125 | °C | |
| Quiescent Current | 75 | 125 | µA | |
| Bandwidth | 400 | kHz | ||
| Settling Time (0.1%) | 3 | µs | ||
| Output-Current Noise Density | 20 | pA/√Hz |
Key Features
- Complete bidirectional current measurement circuit
- Wide supply range: 2.7V to 40V
- Supply-independent common-mode voltage: 2.7V to 60V
- Resistor programmable gain set
- Low quiescent current: 75µA (typ)
- Compact MSOP-8 package
- High common-mode rejection ratio (CMRR): up to 120 dB
- High bandwidth: up to 400 kHz
Applications
- Current shunt measurement in automotive, telephone, computers, power systems, and general instrumentation
- Portable and battery-backup systems
- Battery chargers
- Power management
- Cell phones
Q & A
- What is the primary function of the INA170EA/250? The INA170EA/250 is a high-side, bidirectional current shunt monitor designed to measure current in various applications.
- What is the supply voltage range for the INA170EA/250? The supply voltage range is from 2.7V to 40V.
- What is the common-mode voltage range for the INA170EA/250? The common-mode voltage range is from 2.7V to 60V.
- How is the gain set for the INA170EA/250? The gain is set using an external resistor (RL).
- What is the typical quiescent current of the INA170EA/250? The typical quiescent current is 75µA.
- What package type is the INA170EA/250 available in? The INA170EA/250 is available in an MSOP-8 package.
- What is the operating temperature range for the INA170EA/250? The operating temperature range is from -55°C to +125°C.
- What is the bandwidth of the INA170EA/250? The bandwidth is up to 400 kHz.
- How is the output voltage offset set for the INA170EA/250? The output voltage offset is set using an external resistor (ROS) and a reference voltage (VREF).
- What are some common applications for the INA170EA/250? Common applications include current shunt measurement in automotive, telephone, computers, power systems, and general instrumentation, as well as portable and battery-backup systems, battery chargers, power management, and cell phones.
