Overview
The INA211-Q1, part of the INA21x-Q1 family, is an automotive-grade, voltage-output, low-side or high-side current-shunt monitor produced by Texas Instruments. This device is designed to accurately measure voltages developed across current-sensing resistors, even at common-mode voltages that exceed the supply voltage. It operates from a single 2.7-V to 26-V power supply, drawing a maximum of 100 µA of supply current, and is specified over an operating temperature range of –40°C to +125°C. The INA211-Q1 is housed in a 6-pin SC70 package, making it suitable for various automotive and industrial applications requiring precise current sensing and monitoring.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Supply Voltage | 2.7 | 26 | V | ||
| Quiescent Current (IQ) | VSENSE = 0 mV, TA = 25°C | 65 | 100 | 115 | µA |
| Common-mode Input (VCM) | TA = –40°C to 125°C | –0.3 | 26 | V | |
| Offset Voltage (VOS), RTI | VSENSE = 0 mV, TA = 25°C | ±0.55 | ±35 | µV | |
| Gain | 500 | V/V | |||
| Gain Error | VSENSE = –5 mV to 5 mV, TA = –40°C to 125°C | ±0.02% | ±1% | ||
| Bandwidth (BW) | CLOAD = 10 pF, TA = 25°C | 7 | kHz | ||
| Slew Rate | TA = 25°C | 0.4 | V/µs | ||
| Output Voltage Swing to V+ Power-Supply Rail | RL = 10 kΩ to GND, TA = –40°C to 125°C | (V+) – 0.05 | (V+) – 0.2 | V |
Key Features
- Zero-Drift Topology: Enables high-precision measurements with low input offset voltages as low as 35 µV and a maximum temperature contribution of 0.5 µV/°C over the full temperature range.
- Wide Common-Mode Range: Can sense drops across shunts at common-mode voltages from –0.3 V to 26 V, independent of the supply voltage.
- High 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: Draws a maximum of 100 µA of supply current.
- Compact Package: Housed in a 6-pin SC70 package, suitable for space-constrained applications.
- High Accuracy: Offers low offset and gain error, making it suitable for precise current sensing and monitoring).
Applications
- Body Control Module: Used in automotive body control modules for various sensing and monitoring tasks).
- Valve Control: Employed in valve control systems to monitor and control valve operations accurately).
- Motor Control: Utilized in motor control applications to sense and monitor motor currents).
- Electronic Stability Control: Integrated into electronic stability control systems for precise current monitoring).
- Wireless Charging Transmitters: Used in wireless charging transmitters to monitor and control charging currents).
Q & A
- What is the operating voltage range of the INA211-Q1?
The INA211-Q1 operates from a single 2.7-V to 26-V power supply).
- What is the maximum quiescent current of the INA211-Q1?
The maximum quiescent current is 100 µA).
- What is the common-mode input voltage range of the INA211-Q1?
The common-mode input voltage range is from –0.3 V to 26 V).
- What are the available gain options for the INA21x-Q1 family?
The available gains are 50 V/V, 75 V/V, 100 V/V, 200 V/V, 500 V/V, and 1000 V/V).
- What is the typical bandwidth of the INA211-Q1?
The typical bandwidth is 7 kHz with a 10 pF load capacitance).
- What is the slew rate of the INA211-Q1?
The slew rate is 0.4 V/µs).
- What is the output voltage swing to the V+ power-supply rail?
The output voltage swing to the V+ power-supply rail is (V+) – 0.05 V to (V+) – 0.2 V).
- What are some typical applications of the INA211-Q1?
Typical applications include body control modules, valve control, motor control, electronic stability control, and wireless charging transmitters).
- What package type is the INA211-Q1 available in?
The INA211-Q1 is available in a 6-pin SC70 package).
- What is the operating temperature range of the INA211-Q1?
The operating temperature range is from –40°C to +125°C).
