Overview
The AMC1301SDWVR is a precision, isolated amplifier produced by Texas Instruments. This component is designed for high-accuracy current sensing applications, particularly in environments requiring reinforced isolation. The AMC1301 features an output separated from the input circuitry by an isolation barrier, which is highly resistant to magnetic interference and certified to provide up to 7070 V PEAK reinforced isolation according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577 standards. It supports a working voltage up to 1 kV RMS and operates over an extended industrial temperature range of –40°C to +125°C, with the AMC1301S variant specified for –55°C to +125°C.
Key Specifications
| Parameter | Min | Typ | 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% | - |
| Operating Temperature Range | -40 | - | 125 | °C |
| Power Supply Voltage (High-Side) | 3.0 | 5.0 | 5.5 | V |
| Power Supply Voltage (Low-Side) | 3.0 | 3.3 | 5.5 | V |
| Isolation Voltage (Reinforced) | - | - | 7070 V PEAK | - |
Key Features
- ±250-mV input voltage range optimized for current measurements using shunt resistors.
- Fixed gain of 8.2 V/V.
- Low DC errors: offset error ±0.2 mV, offset drift ±3 µV/°C, gain error ±0.3%, and gain drift ±50 ppm/°C.
- Nonlinearity of 0.03% (max).
- 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-V PEAK reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17) and 5000-V RMS 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 AMC1301?
The input voltage range of the AMC1301 is ±250 mV, optimized for current measurements using shunt resistors.
- What is the fixed gain of the AMC1301?
The fixed gain of the AMC1301 is 8.2 V/V.
- What are the key DC error specifications of the AMC1301?
The AMC1301 has 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 AMC1301?
The AMC1301 has a reinforced isolation rating of up to 7070 V PEAK and supports a working voltage up to 1 kV RMS.
- What are the operating temperature ranges for the AMC1301 and AMC1301S?
The AMC1301 operates from –40°C to +125°C, while the AMC1301S operates from –55°C to +125°C.
- What are some of the system-level diagnostic features of the AMC1301?
The AMC1301 includes common-mode overvoltage detection and missing high-side supply voltage detection features.
- What are the typical applications of the AMC1301?
The AMC1301 is typically used in shunt-resistor-based current sensing in motor drives, frequency inverters, and uninterruptible power supplies, as well as in onboard chargers and DC/DC converters.
- What is the package type of the AMC1301?
The AMC1301 is available in an 8-pin SOIC (DWV) package.
- What are the power supply voltage requirements for the AMC1301?
The AMC1301 requires a power supply voltage of 3.0 V to 5.5 V for both the high-side and low-side.
- How does the AMC1301 protect against electrical damage?
The AMC1301 protects the low-side from high voltage levels through its reinforced isolation barrier, preventing electrical damage and potential harm to operators.
