Overview
The Texas Instruments AMC1301DWV is a precision, isolated amplifier designed for high-accuracy current sensing applications. It features a ±250 mV input voltage range, optimized for use with shunt resistors, and a fixed gain of 8.2 V/V. The device is characterized by its low DC errors, including an offset error of ±0.2 mV, offset drift of ±3 µV/°C, gain error of ±0.3%, and gain drift of ±50 ppm/°C. The AMC1301DWV provides reinforced isolation of up to 7070 V PEAK, adhering to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577 standards, ensuring robust protection against high-voltage levels and magnetic interference.
The device operates on both 3.3 V and 5 V supplies on the high-side and low-side, and it is fully specified over an extended industrial temperature range of –40°C to +125°C. The AMC1301DWV also includes system-level diagnostic features such as common-mode overvoltage and missing high-side supply voltage detection, simplifying system design and diagnostics.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Input Voltage Range | -250 | - | 250 | mV |
| Fixed Gain | - | 8.2 | - | V/V |
| Offset Error | -0.2 | - | 0.2 | mV |
| Offset Drift | -3 | - | 3 | µV/°C |
| Gain Error | -0.3% | - | 0.3% | - |
| Gain Drift | -50 | - | 50 | ppm/°C |
| Nonlinearity | -0.03% | - | 0.03% | - |
| High-side Supply Voltage | 3.0 | - | 5.5 | V |
| Low-side Supply Voltage | 3.0 | - | 5.5 | V |
| Operating Temperature Range | -40 | - | 125 | °C |
| Isolation Voltage | - | - | 7070 | V PEAK |
Key Features
- Precision and Isolation: The AMC1301DWV offers high accuracy with low DC errors and reinforced isolation up to 7070 V PEAK, protecting against high-voltage levels and magnetic interference.
- Optimized Input Range: The device has an input voltage range of ±250 mV, ideal for current measurements using shunt resistors.
- System-Level Diagnostics: Integrated common-mode overvoltage and missing high-side supply voltage detection simplify system design and diagnostics.
- Wide Operating Temperature Range: Fully specified over –40°C to +125°C, with the AMC1301S variant specified from –55°C to +125°C.
- Dual Supply Operation: Operates on both 3.3 V and 5 V supplies on the high-side and low-side.
- Robust Packaging: Available in a wide-body 8-pin SOIC (DWV) package.
Applications
- Motor Drives: Accurate current control in motor drive systems.
- Frequency Inverters: High-precision current sensing in frequency inverter applications.
- Onboard Chargers (OBC): Used in onboard chargers for electric vehicles to ensure accurate current control.
- DC/DC Converters: Suitable for high-voltage applications in DC/DC converters.
- Uninterruptible Power Supplies (UPS): Shunt-resistor-based current sensing in UPS systems.
Q & A
- What is the input voltage range of the AMC1301DWV?
The input voltage range is ±250 mV, optimized for current measurements using shunt resistors.
- What is the fixed gain of the AMC1301DWV?
The fixed gain is 8.2 V/V.
- What are the key DC error specifications of the AMC1301DWV?
The key DC error specifications include an offset error of ±0.2 mV, offset drift of ±3 µV/°C, gain error of ±0.3%, and gain drift of ±50 ppm/°C.
- What is the isolation voltage rating of the AMC1301DWV?
The device provides reinforced isolation of up to 7070 V PEAK according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577 standards.
- What are the operating supply voltages for the AMC1301DWV?
The device operates on both 3.3 V and 5 V supplies on the high-side and low-side.
- What is the operating temperature range of the AMC1301DWV?
The device is fully specified over an extended industrial temperature range of –40°C to +125°C, with the AMC1301S variant specified from –55°C to +125°C.
- What are the system-level diagnostic features of the AMC1301DWV?
The device includes integrated common-mode overvoltage and missing high-side supply voltage detection features.
- In what package is the AMC1301DWV available?
The device is available in a wide-body 8-pin SOIC (DWV) package.
- What are some typical applications of the AMC1301DWV?
Typical applications include motor drives, frequency inverters, onboard chargers (OBC), DC/DC converters, and uninterruptible power supplies (UPS).
- How does the AMC1301DWV protect against high-voltage levels?
The device protects against high-voltage levels through its reinforced isolation barrier, which separates parts of the system operating on different common-mode voltage levels and prevents electrical damage to the low-side.
