Overview
The INA139-Q1, produced by Texas Instruments, is a high-side, unidirectional current shunt monitor designed for automotive and other high-reliability applications. This device is part of the INA1x9-Q1 family and is known for its wide input common-mode voltage range, high speed, and low quiescent current. It is packaged in an 8-pin TSSOP (PW) package and operates over a temperature range of –40°C to +125°C. The INA139-Q1 converts a differential input voltage to a current output, which can then be converted back to a voltage using an external load resistor, allowing for flexible gain settings from 1 to over 100.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature Range | –40°C to 125°C | °C |
| Supply Voltage Range | 2.7 V to 40 V | V |
| Input Bias Current | 10 µA | µA |
| Input Offset Voltage (Vos) | 2 mV | mV |
| Common Mode Rejection Ratio | 100 dB | dB |
| Quiescent Current | 60 µA (Typical) | µA |
| Package Type | TSSOP-8 | |
| Package Size | 4.40 mm × 3.00 mm | mm |
| ESD Classification | HBM Level 2, CDM Level C6 |
Key Features
- Qualified for Automotive Applications and AEC-Q100 certified.
- Complete unidirectional high-side current measurement circuit.
- Wide supply and common-mode voltage ranges (2.7 V to 40 V for INA139-Q1).
- Independent supply and input common-mode voltages.
- Single resistor gain set, allowing for flexible gain settings.
- Low quiescent current (60 µA typical).
- High-speed operation and wide temperature range (–40°C to +125°C).
Applications
- Electric Power Steering (EPS) Systems.
- Body Control Modules.
- Brake Systems.
- Electronic Stability Control (ESC) Systems.
Q & A
- What is the operating temperature range of the INA139-Q1? The operating temperature range is –40°C to 125°C.
- What is the supply voltage range for the INA139-Q1? The supply voltage range is 2.7 V to 40 V.
- What is the typical quiescent current of the INA139-Q1? The typical quiescent current is 60 µA.
- What is the common-mode rejection ratio of the INA139-Q1? The common-mode rejection ratio is 100 dB.
- What package type is the INA139-Q1 available in? The INA139-Q1 is available in a TSSOP-8 package.
- Is the INA139-Q1 qualified for automotive applications? Yes, it is qualified for automotive applications and is AEC-Q100 certified.
- How is the gain set in the INA139-Q1? The gain is set using a single external resistor.
- What are some typical applications of the INA139-Q1? Typical applications include Electric Power Steering (EPS) Systems, Body Control Modules, Brake Systems, and Electronic Stability Control (ESC) Systems.
- What is the input bias current of the INA139-Q1? The input bias current is 10 µA.
- What is the input offset voltage (Vos) of the INA139-Q1? The input offset voltage (Vos) is 2 mV.
