Overview
The AMC3302QDWERQ1 from Texas Instruments is a high-precision, isolated amplifier designed specifically for automotive applications. This device is optimized for shunt-based current measurements and features an integrated DC/DC converter, which allows for single-supply operation from the low-side of the device. This unique design makes it an ideal solution for space-constrained applications. The AMC3302QDWERQ1 is AEC-Q100 qualified, ensuring reliability over a temperature range of –40°C to +125°C, and it is certified for reinforced isolation according to VDE V 0884-11 and UL1577 standards.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | ±50 mV | |
| Fixed Gain | 41 | |
| Offset Voltage | ±50 µV (max) | |
| Offset Drift | ±0.5 µV/°C (max) | |
| Gain Error | ±0.2% (max) | |
| Gain Error Drift | ±35 ppm/°C (max) | |
| Nonlinearity | ±0.03% (max) | |
| Common-Mode Transient Immunity (CMTI) | 95 kV/µs (min) | |
| Isolation Voltage | 6000 VPK, 4250 VRMS for 1 minute per UL1577 | |
| Operating Temperature Range | –40°C to +125°C | |
| Supply Voltage | 3.3 V or 5 V |
Key Features
- AEC-Q100 Qualification: Ensures reliability for automotive applications over a temperature range of –40°C to +125°C.
- Integrated DC/DC Converter: Allows for single-supply operation from the low-side, reducing design complexity.
- High Accuracy: Offers low offset voltage, gain error, and nonlinearity for precise current measurements.
- Reinforced Isolation: Certified for 6000 VPK isolation per DIN VDE V 0884-11 and 4250 VRMS per UL1577.
- Wide Input Voltage Range: ±50 mV differential input voltage range optimized for current measurement using shunt resistors.
- High CMTI: Minimum common-mode transient immunity (CMTI) of 95 kV/µs ensures robustness against high-voltage transients.
- System-Level Diagnostics: Includes diagnostic features to simplify system-level design and ensure safe operation.
- EMI Compliance: Meets CISPR-11 and CISPR-25 EMI standards.
Applications
- Shunt-Resistor-Based Current Sensing: Ideal for applications such as HEV/EV charging piles, HEV/EV on-board chargers (OBC), HEV/EV DC/DC converters, and HEV/EV traction inverters.
- Automotive Systems: Suitable for various automotive applications requiring high precision and reliability in current sensing.
- Industrial and Power Systems: Can be used in industrial and power systems where accurate current measurement and high isolation are necessary.
Q & A
- What is the input voltage range of the AMC3302QDWERQ1?
The input voltage range is ±50 mV, optimized for current measurement using shunt resistors.
- What is the fixed gain of the AMC3302QDWERQ1?
The fixed gain is 41.
- What are the isolation certifications for the AMC3302QDWERQ1?
The device is certified for 6000 VPK isolation per DIN VDE V 0884-11 and 4250 VRMS for 1 minute per UL1577.
- What is the operating temperature range of the AMC3302QDWERQ1?
The operating temperature range is –40°C to +125°C.
- Does the AMC3302QDWERQ1 meet any EMI standards?
Yes, it meets CISPR-11 and CISPR-25 EMI standards.
- What is the purpose of the integrated DC/DC converter in the AMC3302QDWERQ1?
The integrated DC/DC converter allows for single-supply operation from the low-side of the device, reducing design complexity.
- What are the key diagnostic features of the AMC3302QDWERQ1?
The device includes diagnostic features such as fault-detection and diagnostic output pin to simplify system-level design and ensure safe operation.
- Is the AMC3302QDWERQ1 suitable for automotive applications?
Yes, it is AEC-Q100 qualified and designed specifically for automotive applications.
- What is the common-mode transient immunity (CMTI) of the AMC3302QDWERQ1?
The minimum CMTI is 95 kV/µs.
- What is the typical application of the AMC3302QDWERQ1 in HEV/EV systems?
It is commonly used in shunt-resistor-based current sensing for HEV/EV charging piles, on-board chargers, DC/DC converters, and traction inverters.
