Overview
The INA211-Q1, part of the INA21x-Q1 family, is a voltage-output, current-shunt monitor 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 INA211-Q1 can operate from a single 2.7-V to 26-V power supply and is suitable for both low-side and high-side configurations. It is commonly used in applications requiring accurate measurement of voltages across current-sensing resistors, such as overcurrent detection, voltage feedback control loops, and power monitoring.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Gain | 500 | V/V |
| Input Common-Mode Voltage Range | –0.3 to 26 | V |
| Supply Voltage Range | 2.7 to 26 | V |
| Quiescent Current | 65 to 100 | µA |
| Offset Voltage, RTI | ±0.55 to ±35 | µV |
| Common-Mode Rejection Ratio (CMRR) | 105 to 140 | dB |
| Bandwidth (CLOAD = 10 pF) | 7 | kHz |
| Slew Rate | 0.4 | V/µs |
| Output Voltage Swing to V+ Power-Supply Rail | (V+) – 0.05 to (V+) – 0.2 | V |
| Package | SC70 (6-pin) | |
| Body Size (Nominal) | 2.00 mm × 1.25 mm |
Key Features
- AEC-Q100 Qualified: Ensures reliability for automotive applications over a temperature range of –40°C to +125°C.
- Zero-Drift Architecture: Provides high-precision current sensing with minimal offset voltage.
- Wide Common-Mode Voltage Range: Can sense drops across shunts at common-mode voltages from –0.3 V to 26 V.
- Flexible Gain Options: Available in 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 with a quiescent current of 65 to 100 µA.
- High Accuracy: Low offset voltage and high common-mode rejection ratio ensure accurate measurements.
- Compact Package: Available in a 6-pin SC70 package with a nominal body size of 2.00 mm × 1.25 mm.
Applications
- Body Control Module: Used in automotive body control systems for precise current monitoring.
- Valve Control: Employed in valve control systems to monitor and control current flow accurately.
- Motor Control: Utilized in motor control applications for overcurrent detection and power monitoring.
- Electronic Stability Control: Integrated into electronic stability control systems to ensure stable and precise current measurements.
- Wireless Charging Transmitters: Used in wireless charging systems to monitor and control current flow efficiently.
Q & A
- What is the operating temperature range of the INA211-Q1?
The INA211-Q1 operates over a temperature range of –40°C to +125°C.
- What is the gain of the INA211-Q1?
The gain of the INA211-Q1 is 500 V/V.
- What is the common-mode voltage range of the INA211-Q1?
The common-mode voltage range is from –0.3 V to 26 V.
- What is the supply voltage range for the INA211-Q1?
The supply voltage range is from 2.7 V to 26 V.
- What is the quiescent current of the INA211-Q1?
The quiescent current is 65 to 100 µA.
- What is the offset voltage of the INA211-Q1?
The offset voltage is ±0.55 to ±35 µV.
- What is the common-mode rejection ratio (CMRR) of the INA211-Q1?
The CMRR is 105 to 140 dB.
- What is the bandwidth of the INA211-Q1 with a 10 pF load capacitance?
The bandwidth is 7 kHz.
- What is the slew rate of the INA211-Q1?
The slew rate is 0.4 V/µs.
- In what package is the INA211-Q1 available?
The INA211-Q1 is available in a 6-pin SC70 package.
