Overview
The AMC1300BDWVR, produced by Texas Instruments, is a precision, isolated amplifier designed for high-accuracy current measurement applications. This device features a reinforced isolation barrier, providing up to 5 kV RMS of galvanic isolation according to VDE V 0884-11 and UL1577 standards. The AMC1300 is optimized for direct connection to shunt resistors or other low-voltage signal sources, making it ideal for motor control, frequency inverters, and uninterruptible power supplies. The device operates over a wide temperature range and includes system-level diagnostic features such as common-mode overvoltage and missing high-side supply voltage detection.
Key Specifications
| Parameter | AMC1300 | AMC1300B |
|---|---|---|
| High-side supply voltage (VDD1) | 4.5 V to 5.5 V | 3.0 V to 5.5 V |
| Specified ambient temperature (TA) | –40°C to +125°C | –55°C to +125°C |
| Input offset voltage (VOS) | ±2 mV (max) | ±0.2 mV (max) |
| Input offset drift (TCVOS) | ±4 µV/°C (max) | ±0.9 µV/°C (max) |
| Gain error (EG) | ±1% (max) | ±0.3% (max) |
| Gain error drift (TCEG) | ±50 ppm/°C (typ) | ±30 ppm/°C (max) |
| Common-mode transient immunity (CMTI) | 15 kV/µs (min) | 100 kV/µs (min) |
| Output bandwidth (BW) | 170 kHz (min) | 250 kHz (min) |
| Signal delay (50% - 90%) | 3.4 µs (max) | 3 µs (max) |
Key Features
- ±250-mV input voltage range optimized for current measurement using shunt resistors.
- Fixed gain of 8.2.
- Low DC errors: offset error, offset drift, gain error, and gain drift.
- High common-mode transient immunity (CMTI): 100 kV/µs (minimum) for AMC1300B.
- Low EMI, meeting CISPR-11 and CISPR-25 standards.
- System-level diagnostic features including common-mode overvoltage and missing high-side supply voltage detection.
- Safety-related certifications: 7071-VPK reinforced isolation per DIN VDE V 0884-11: 2017-01 and 5000-VRMS isolation for 1 minute per UL1577.
Applications
- Shunt-resistor-based current sensing in motor drives.
- Frequency inverters.
- Uninterruptible power supplies (UPS).
Q & A
- What is the input voltage range of the AMC1300?
The input voltage range of the AMC1300 is ±250 mV, optimized for current measurement using shunt resistors.
- What is the fixed gain of the AMC1300?
The fixed gain of the AMC1300 is 8.2.
- What are the key DC error specifications of the AMC1300B?
The AMC1300B has an offset error of ±0.2 mV, offset drift of ±0.9 µV/°C, gain error of ±0.3%, and gain drift of ±30 ppm/°C.
- What is the common-mode transient immunity (CMTI) of the AMC1300B?
The CMTI of the AMC1300B is 100 kV/µs (minimum).
- Does the AMC1300 meet any specific EMI standards?
- What safety-related certifications does the AMC1300 have?
The AMC1300 has 7071-VPK reinforced isolation per DIN VDE V 0884-11: 2017-01 and 5000-VRMS isolation for 1 minute per UL1577.
- What are the typical applications of the AMC1300?
The AMC1300 is typically used in shunt-resistor-based current sensing in motor drives, frequency inverters, and uninterruptible power supplies.
- What is the operating temperature range of the AMC1300B?
The AMC1300B operates over an extended industrial temperature range of –55°C to +125°C.
- How does the AMC1300 protect against common-mode overvoltage?
The AMC1300 includes system-level diagnostic features such as common-mode overvoltage detection.
- What is the output bandwidth of the AMC1300B?
The output bandwidth of the AMC1300B is 250 kHz (minimum).
