Overview
The INA215-Q1, part of the INA21x-Q1 family, is a voltage-output, current-shunt monitor (current-sense amplifier) designed by Texas Instruments. This device is AEC-Q100 qualified for automotive applications, ensuring reliability over a temperature range of –40°C to +125°C. It features a zero-drift architecture, which enables high-precision current sensing with minimal offset voltage. The INA215-Q1 can operate from a single 2.7-V to 26-V power supply and is available in a compact 6-pin SC70 package.
The device is capable of sensing voltage drops across shunts at common-mode voltages from –0.3 V to 26 V, independent of the supply voltage. It is commonly used for overcurrent detection, voltage feedback control loops, and as a power monitor in various automotive and industrial applications.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Common-mode input voltage (VCM) | TA = –40°C to 125°C | –0.3 | 26 | V | |
| Common-mode rejection ratio (CMRR) | VIN+ = 0 V to 26 V, VSENSE = 0 mV, TA = –40°C to 125°C | 105 | 140 | dB | |
| Offset voltage, RTI (VOS) | VSENSE = 0 mV, TA = 25°C | ±1 | ±60 | µV | |
| Gain | 75 | V/V | |||
| Gain error | VSENSE = –5 mV to 5 mV, TA = –40°C to 125°C | ±0.02% | ±0.5% | ||
| Bandwidth (BW) | CLOAD = 10 pF, TA = 25°C | 40 | kHz | ||
| Slew rate (SR) | TA = 25°C | 0.4 | V/µs | ||
| Quiescent current (IQ) | VSENSE = 0 mV, TA = 25°C | 65 | 100 | 115 | µA |
| Operating temperature range | –40 | 125 | °C | ||
| Package | SC70 (6-pin) |
Key Features
- AEC-Q100 Qualified: Suitable for automotive applications with a temperature range of –40°C to +125°C.
- Zero-Drift Architecture: Enables high-precision current sensing with minimal offset voltage (as low as 1 µV).
- Wide Common-Mode Range: Can sense drops across shunts at common-mode voltages from –0.3 V to 26 V.
- Flexible Gain Options: Available with fixed gains of 50 V/V, 75 V/V, 100 V/V, 200 V/V, 500 V/V, and 1000 V/V.
- Low Power Consumption: Operates from a single 2.7-V to 26-V power supply, drawing a maximum of 100 µA of supply current.
- Compact Packaging: Available in a 6-pin SC70 package.
- High Accuracy: Low offset and gain error, making it suitable for precise current measurement applications.
Applications
- Body Control Module: Used in automotive body control systems for monitoring and controlling various functions.
- Valve Control: Employed in systems that require precise control over valves, such as in automotive and industrial automation.
- Motor Control: Utilized in motor control systems to monitor and regulate motor currents.
- Electronic Stability Control: Used in automotive safety systems to ensure vehicle stability.
- Wireless Charging Transmitters: Applied in wireless charging systems to monitor and control charging currents.
Q & A
- What is the operating temperature range of the INA215-Q1?
The INA215-Q1 operates over a temperature range of –40°C to +125°C.
- What are the available gain options for the INA21x-Q1 family?
The INA21x-Q1 family is available with fixed gains of 50 V/V, 75 V/V, 100 V/V, 200 V/V, 500 V/V, and 1000 V/V.
- What is the typical quiescent current of the INA215-Q1?
The typical quiescent current of the INA215-Q1 is 100 µA.
- What is the common-mode input voltage range of the INA215-Q1?
The INA215-Q1 can sense drops across shunts at common-mode voltages from –0.3 V to 26 V.
- What is the bandwidth of the INA215-Q1?
The bandwidth of the INA215-Q1 is 40 kHz with a 10 pF load capacitance.
- What package is the INA215-Q1 available in?
The INA215-Q1 is available in a 6-pin SC70 package.
- Is the INA215-Q1 suitable for automotive applications?
Yes, the INA215-Q1 is AEC-Q100 qualified, making it suitable for automotive applications.
- What is the slew rate of the INA215-Q1?
The slew rate of the INA215-Q1 is 0.4 V/µs.
- How does the zero-drift architecture benefit the INA215-Q1?
The zero-drift architecture enables high-precision current sensing with minimal offset voltage, reducing shunt dissipation and improving measurement accuracy.
- What are some typical applications of the INA215-Q1?
The INA215-Q1 is used in body control modules, valve control, motor control, electronic stability control, and wireless charging transmitters.
