Overview
The AMC1301DWVR, produced by Texas Instruments, is a precision, ±250-mV input, reinforced isolated amplifier. This device is optimized for current measurements using shunt resistors and features a fixed gain of 8.2 V/V. The AMC1301 is designed to provide high DC accuracy and low temperature drift, making it suitable for accurate current control in various high-voltage applications. The amplifier includes system-level diagnostic features and safety-related certifications, ensuring robust performance and protection against electrical damage.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | ±250 mV | mV |
| Fixed Gain | 8.2 | V/V |
| Offset Error | ±0.2 mV (max) | mV |
| Offset Drift | ±3 µV/°C (max) | µV/°C |
| Gain Error | ±0.3% (max) | % |
| Gain Drift | ±50 ppm/°C (max) | ppm/°C |
| Nonlinearity | 0.03% (max) | % |
| Operating Temperature Range | –40°C to +125°C | °C |
| Isolation Voltage | 7070 VPK (reinforced), 5000 VRMS (1 minute) | V |
| Package Type | 8-Pin SOIC (DWV) |
Key Features
- Optimized for current measurements using shunt resistors with a ±250-mV input voltage range.
- Fixed gain of 8.2 V/V.
- Low DC errors: offset error ±0.2 mV, offset drift ±3 µV/°C, gain error ±0.3%, gain drift ±50 ppm/°C, and nonlinearity 0.03%.
- 3.3-V operation on both high-side and low-side.
- System-level diagnostic features including common-mode overvoltage and missing high-side supply voltage detection.
- Safety-related certifications: 7070 VPK reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17) and 5000 VRMS isolation for 1 minute per UL1577.
- Fully specified over the extended industrial temperature range of –40°C to +125°C.
Applications
- Shunt-resistor-based current sensing in motor drives, frequency inverters, and uninterruptible power supplies.
- Onboard chargers (OBC) and DC/DC converters.
- High-voltage applications requiring accurate current control.
Q & A
- What is the input voltage range of the AMC1301DWVR?
The input voltage range is ±250 mV, optimized for current measurements using shunt resistors.
- What is the fixed gain of the AMC1301DWVR?
The fixed gain is 8.2 V/V.
- What are the key DC error specifications of the AMC1301DWVR?
The key DC error specifications include offset error ±0.2 mV, offset drift ±3 µV/°C, gain error ±0.3%, gain drift ±50 ppm/°C, and nonlinearity 0.03%.
- What is the operating temperature range of the AMC1301DWVR?
The operating temperature range is –40°C to +125°C.
- What safety certifications does the AMC1301DWVR have?
The AMC1301DWVR has safety-related certifications including 7070 VPK reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17) and 5000 VRMS isolation for 1 minute per UL1577.
- What package type is the AMC1301DWVR available in?
The AMC1301DWVR is available in an 8-Pin SOIC (DWV) package.
- What are some of the system-level diagnostic features of the AMC1301DWVR?
The AMC1301DWVR includes system-level diagnostic features such as common-mode overvoltage and missing high-side supply voltage detection.
- What are some typical applications of the AMC1301DWVR?
Typical applications include shunt-resistor-based current sensing in motor drives, frequency inverters, and uninterruptible power supplies, as well as onboard chargers (OBC) and DC/DC converters.
- How does the isolation barrier in the AMC1301DWVR protect the system?
The isolation barrier separates parts of the system that operate on different common-mode voltage levels and protects the low-side from voltage levels that can cause electrical damage and are potentially harmful to an operator.
- Is the AMC1301DWVR suitable for high-voltage applications?
