Overview
The AMC1311DWV, produced by Texas Instruments, is a precision, isolated amplifier designed for high-accuracy voltage sensing and control in various industrial and automotive applications. This component features a capacitive isolation barrier that provides reinforced galvanic isolation of up to 5 kV RMS, adhering to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577 standards. The isolation barrier protects the low-voltage side from high voltages that could cause electrical damage or harm to operators. The AMC1311DWV is optimized for connection to high-impedance resistive dividers or other high-impedance voltage signal sources, ensuring accurate and reliable voltage measurements in closed-loop systems.
Key Specifications
| Parameter | AMC1311 | AMC1311B |
|---|---|---|
| Input Voltage Range | 2 V | 2 V |
| Fixed Gain | 1 | 1 |
| Offset Error (Maximum) | ±9.9 mV | ±1.5 mV |
| Offset Drift (Typical/Maximum) | ±20 µV/°C (typical) | ±10 µV/°C (maximum) |
| Gain Error (Maximum) | ±1% | ±0.2% |
| Gain Drift (Typical/Maximum) | ±30 ppm/°C (typical) | ±40 ppm/°C (maximum) |
| Nonlinearity (Maximum) | - | 0.04% |
| Operating Temperature Range | –40°C to +125°C | –55°C to +125°C |
| Isolation Voltage (RMS) | Up to 5 kV | Up to 5 kV |
| Package | SOIC-8 (DWV) | SOIC-8 (DWV) |
Key Features
- High-Impedance Input: Optimized for connection to high-impedance resistive dividers or other high-impedance voltage signal sources.
- Low DC Errors: Excellent DC accuracy with low offset and gain errors, and minimal temperature drift.
- Reinforced Isolation: Provides up to 5 kV RMS galvanic isolation, certified to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577 standards.
- Missing High-Side Supply Detection: Integrated feature for detecting missing high-side supply voltage, simplifying system-level design and diagnostics.
- High CMTI: Common-mode transient immunity of 100 kV/µs (minimum) for the AMC1311B.
- Extended Temperature Range: Fully specified over the extended industrial temperature range of –40°C to +125°C for the AMC1311, and –55°C to +125°C for the AMC1311B.
Applications
- Industrial Automation: Used in control systems, motor drives, and power supplies where accurate voltage sensing is crucial.
- Automotive Systems: Suitable for battery management systems, traction inverters, and other high-voltage applications in electric vehicles.
- Medical Devices: Applied in medical equipment requiring isolated voltage measurements to ensure patient safety.
- Renewable Energy Systems: Utilized in solar and wind power systems for monitoring and controlling high-voltage components.
Q & A
- What is the primary function of the AMC1311DWV?
The AMC1311DWV is a precision, isolated amplifier designed for accurate voltage sensing and control in high-voltage applications.
- What is the input voltage range of the AMC1311DWV?
The input voltage range is 2 V, optimized for high-impedance voltage signal sources.
- What are the key differences between the AMC1311 and AMC1311B?
The AMC1311B has tighter offset and gain errors, and operates over a wider temperature range of –55°C to +125°C compared to the AMC1311's range of –40°C to +125°C.
- What is the isolation voltage rating of the AMC1311DWV?
The AMC1311DWV provides up to 5 kV RMS galvanic isolation.
- What package type is the AMC1311DWV available in?
The AMC1311DWV is available in an SOIC-8 (DWV) package.
- What is the common-mode transient immunity (CMTI) of the AMC1311B?
The CMTI of the AMC1311B is 100 kV/µs (minimum).
- Does the AMC1311DWV have any integrated diagnostic features?
Yes, it includes a missing high-side supply voltage detection feature.
- In which industries is the AMC1311DWV commonly used?
The AMC1311DWV is used in industrial automation, automotive systems, medical devices, and renewable energy systems.
- What are the benefits of the high-impedance input of the AMC1311DWV?
The high-impedance input allows for accurate measurements from high-impedance sources, such as resistive dividers, without loading the signal source.
- Are there any safety certifications for the AMC1311DWV?
Yes, it is certified to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577 standards for reinforced galvanic isolation.
