Overview
The INA170EA/2K5, produced by Texas Instruments, is a high-side, bidirectional current shunt monitor. This component is designed to measure bidirectional current with a wide input common-mode voltage range and low quiescent current. It features a tiny MSOP-8 package and is specified over the extended industrial temperature range of –40°C to +85°C, with operation from –55°C to +125°C.
The INA170EA/2K5 allows for the measurement of bidirectional shunt current using a single supply, making it versatile for various applications. The input common-mode and power-supply voltages are independent, with input voltage ranging from +2.7V to +60V on any supply voltage from +2.7V to +40V.
Key Specifications
| Parameter | Condition | Min | Max | Units | |
|---|---|---|---|---|---|
| Full-Scale Sense (Input) Voltage | VSENSE = VIN+ - VIN– | 100 | 500 | mV | |
| Common-Mode Input Range | +2.7 | +60 | V | ||
| Common-Mode Rejection | VIN+ = +2.7V to +60V, VSENSE = 50mV | 100 | 120 | dB | |
| Offset Voltage(1) RTI | ±0.2 | ±1 | mV | ||
| Input Bias Current | VIN+, VIN– | 10 | µA | ||
| Bandwidth | ROUT = 10kΩ | 400 | kHz | ||
| Settling Time (0.1%) | 5V Step, ROUT = 10kΩ | 3 | µs | ||
| Output-Current Noise Density | 20 | pA/√Hz | |||
| Total Output-Current Noise | BW = 100kHz | 7 | nA RMS | ||
| Operating Range | V+ | +2.7 | +40 | V | |
| Quiescent Current | VSENSE = 0, IO = 0 | 75 | 125 | µA | |
| Temperature Range | Specification, TMIN to TMAX | –40 | +85 | °C | |
| Thermal Resistance, θJA | 150 | °C/W |
Key Features
- Complete Bidirectional Current Measurement Circuit: Allows for the measurement of bidirectional shunt current.
- Wide Supply Range: Operates from +2.7V to +40V.
- Supply-Independent Common-Mode Voltage: Input common-mode voltage range from +2.7V to +60V.
- Resistor Programmable Gain Set: Gain can be set from 1 to over 100 using external resistors.
- Low Quiescent Current: Typical quiescent current of 75µA.
- MSOP-8 Package: Compact MSOP-8 package.
Applications
- Current Shunt Measurement: Used in automotive, telephone, computers, power systems, test equipment, and general instrumentation.
- Portable and Battery-Backup Systems: Suitable for battery-powered devices and backup systems.
- Battery Chargers: Ideal for monitoring current in battery charging applications.
- Power Management: Used in various power management circuits.
- Cell Phones: Applicable in mobile phone power management systems.
Q & A
- What is the primary function of the INA170EA/2K5?
The INA170EA/2K5 is a high-side, bidirectional current shunt monitor designed to measure bidirectional shunt current.
- What is the operating voltage range of the INA170EA/2K5?
The INA170EA/2K5 operates from +2.7V to +40V.
- What is the common-mode input voltage range of the INA170EA/2K5?
The common-mode input voltage range is from +2.7V to +60V.
- How is the gain set in the INA170EA/2K5?
The gain can be set from 1 to over 100 using external resistors.
- What is the typical quiescent current of the INA170EA/2K5?
The typical quiescent current is 75µA.
- In what package is the INA170EA/2K5 available?
The INA170EA/2K5 is available in an MSOP-8 package.
- What are the typical applications of the INA170EA/2K5?
Typical applications include current shunt measurement in automotive, telephone, computers, power systems, test equipment, and general instrumentation, as well as in portable and battery-backup systems, battery chargers, power management, and cell phones.
- What is the bandwidth of the INA170EA/2K5?
The bandwidth is up to 400 kHz.
- How does the INA170EA/2K5 handle offset voltage?
The offset voltage level is set with an external resistor and voltage reference.
- What is the thermal resistance (θJA) of the INA170EA/2K5?
The thermal resistance (θJA) is 150°C/W.
- What is the operating temperature range of the INA170EA/2K5?
The operating temperature range is from –40°C to +85°C, with operation from –55°C to +125°C.
