Overview
The AMC1305M25DWR is a high-precision, reinforced isolated delta-sigma modulator produced by Texas Instruments. This device is part of the AMC1305 family, which is optimized for shunt-resistor-based current measurements and isolated voltage sensing. The AMC1305M25DWR features a capacitive double isolation barrier, providing reinforced isolation up to 7000 VPEAK, adhering to DIN VDE V 0884-11, UL1577, and CSA standards. This isolation prevents noise currents on high common-mode voltage lines from interfering with or damaging low-voltage circuitry. The device supports excellent DC and AC performance and is suitable for various industrial applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| High-side Supply Voltage (AVDD) | 4.5 | 5.0 | 5.5 | V |
| Controller-side Supply Voltage (DVDD) | 3.0 | 3.3 | 5.5 | V |
| High-side Supply Current (IAVDD) | 6.5 | 8.2 | mA | |
| Controller-side Supply Current (IDVDD) | 2.7 | 4.0 | 5.5 | mA |
| Input Voltage Range (AINP-AINN) | -250 | 250 | mV | |
| Offset Error | ±150 µV | |||
| Gain Error | ±0.3% | |||
| External Clock Input Frequency (fCLKIN) | 5 | 20.1 | MHz | |
| Operating Temperature Range | -40 | 125 | °C |
Key Features
- Pin-compatible family optimized for shunt-resistor-based current measurements with ±250-mV input voltage range.
- CMOS or LVDS digital interface options.
- Excellent DC performance: offset error ±150 µV, offset drift 1.3 µV/°C, gain error ±0.3%, and gain drift ±40 ppm/°C.
- Safety-related certifications: 7000-VPK reinforced isolation per DIN VDE V 0884-11: 2017-01, 5000-VRMS isolation for 1 minute per UL1577, and compliance with CAN/CSA and IEC 62368-1 standards.
- Transient immunity: 15 kV/µs (min).
- High electromagnetic field immunity.
- External 5-MHz to 20-MHz clock input for system-level synchronization.
- Fully specified over the extended industrial temperature range.
Applications
- Shunt-resistor-based current sensing in industrial motor drives.
- Photovoltaic inverters.
- Uninterruptible power supplies (UPS).
- Isolated voltage sensing.
Q & A
- What is the AMC1305M25DWR used for?
The AMC1305M25DWR is used for high-precision, shunt-resistor-based current measurements and isolated voltage sensing in various industrial applications.
- What are the key safety certifications of the AMC1305M25DWR?
The device is certified for 7000-VPK reinforced isolation per DIN VDE V 0884-11: 2017-01, 5000-VRMS isolation for 1 minute per UL1577, and complies with CAN/CSA and IEC 62368-1 standards.
- What is the operating temperature range of the AMC1305M25DWR?
The device operates over an extended industrial temperature range from -40°C to +125°C.
- What are the input voltage ranges for the AMC1305M25DWR?
The input voltage range is ±250 mV.
- What types of digital interfaces does the AMC1305M25DWR support?
The device supports CMOS or LVDS digital interface options.
- What is the typical power dissipation of the AMC1305M25DWR?
The high-side power dissipation is typically 45.1 mW, and the controller-side power dissipation varies based on the DVDD voltage.
- How does the AMC1305M25DWR achieve high electromagnetic field immunity?
The device features a capacitive double isolation barrier and is designed to provide high electromagnetic field immunity as detailed in the application note SLLA181A.
- What is the external clock input frequency range for the AMC1305M25DWR?
The external clock input frequency range is from 5 MHz to 20.1 MHz.
- What are the typical applications of the AMC1305M25DWR?
Typical applications include shunt-resistor-based current sensing in industrial motor drives, photovoltaic inverters, and uninterruptible power supplies, as well as isolated voltage sensing.
- What is the package type of the AMC1305M25DWR?
The device is available in a wide-body SOIC-16 (DW) package.
