Overview
The INA2181A1QDGSRQ1 is an automotive-grade, bidirectional, low- and high-side current sense amplifier manufactured by Texas Instruments. This device is part of the INAx181-Q1 family, which includes single-channel (INA181-Q1), dual-channel (INA2181-Q1), and quad-channel (INA4181-Q1) variants. The INA2181A1QDGSRQ1 is specifically designed for cost-optimized applications and is suitable for both low-side and high-side current sensing configurations.
These current sense amplifiers accurately measure voltages developed across current-sensing resistors at common-mode voltages up to 26 V, while being powered from a supply voltage as low as 2.7 V to 5.5 V. This makes them versatile for various automotive and industrial applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VS) | 2.7 to 5.5 | V |
| Common-Mode Voltage Range | -0.2 to 26 | V |
| Differential Input Voltage Range | -28 to 28 | V |
| Output Voltage Range | GND - 0.3 to VS + 0.3 | V |
| Maximum Output Current (IOUT) | 8 | mA |
| Quiescent Current (IQ) | 356 to 500 | μA |
| Operating Temperature Range | -40 to 125 | °C |
| Package Type | 10-pin VSSOP | |
| Gain Options | 20V/V, 50V/V, 100V/V, 200V/V |
Key Features
- Bidirectional Current Sensing: Capable of measuring current in both directions.
- High Common-Mode Voltage Range: Can sense voltages up to 26 V, independent of the supply voltage.
- Low Power Consumption: Operates with a quiescent current of 356 to 500 μA.
- Fixed Gain Options: Available in four fixed gain options: 20V/V, 50V/V, 100V/V, and 200V/V.
- Automotive Grade: Qualified for automotive applications with an operating temperature range of -40°C to 125°C.
- Compact Packaging: Available in a 10-pin VSSOP package.
Applications
- Motor Control: Used in motor control systems to monitor current flow.
- Battery Monitors and Balancers: Essential for battery management systems to ensure balanced and safe operation.
- Power Management: Utilized in power management systems to monitor and control power consumption.
- Lighting Control: Applied in lighting control systems to manage and monitor current flow.
Q & A
- What is the supply voltage range for the INA2181A1QDGSRQ1?
The supply voltage range is from 2.7 V to 5.5 V.
- What is the common-mode voltage range for this device?
The common-mode voltage range is from -0.2 V to 26 V.
- How many channels does the INA2181A1QDGSRQ1 have?
The INA2181A1QDGSRQ1 is a dual-channel current sense amplifier.
- What are the available gain options for this device?
The gain options are 20V/V, 50V/V, 100V/V, and 200V/V.
- What is the maximum output current of the INA2181A1QDGSRQ1?
The maximum output current is 8 mA.
- What is the operating temperature range for this device?
The operating temperature range is from -40°C to 125°C.
- What type of package does the INA2181A1QDGSRQ1 come in?
The device comes in a 10-pin VSSOP package.
- Is the INA2181A1QDGSRQ1 suitable for automotive applications?
Yes, it is automotive-grade and qualified for use in automotive applications.
- What are some common applications for the INA2181A1QDGSRQ1?
Common applications include motor control, battery monitors and balancers, power management, and lighting control.
- How much quiescent current does the INA2181A1QDGSRQ1 consume?
The quiescent current is between 356 μA and 500 μA.
