Texas Instruments AMC3302/AMC3302-Q1 Reinforced Isolated Amplifiers
Texas Instruments AMC3302/AMC3302-Q1 Reinforced Isolated Amplifiers are precision, isolated amplifiers optimized for shunt-based current measurements. The fully integrated, isolated DC/DC converter allows single-supply operation from the low-side of the device, which makes the device a unique solution for space-constrained applications. The reinforced capacitive isolation barrier is certified according to VDE V 0884-11 and UL1577 and supports a working voltage of up to 1.2kVRMS. The isolation barrier separates parts of the system that operate on different common-mode voltage levels and protects the low-voltage side from hazardous voltages and damage.
The input of the AMC3302/AMC3302-Q1 is optimized for direct connection to a low-impedance shunt resistor or another low-impedance voltage source with low signal levels. The excellent DC accuracy and low-temperature drift support accurate current measurements over the extended industrial temperature range from –40°C to +125°C. The integrated DC/DC converter fault-detection and diagnostic output pin of the Texas Instruments AMC3302/AMC3302-Q1 simplify system-level design and diagnostics.
Features
- AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, TA
- 3.3V or 5V single supply with integrated DC/DC converter
- ±50mV input voltage range optimized for current measurement using shunt resistors
- 41 fixed gain
- Low DC errors
- ±50µV (max) offset voltage
- ±0.5µV/°C (max) offset drift
- ±0.2% (max) gain error
- ±35ppm/°C (max) gain error drift
- ±0.03% (max) nonlinearity
- 85kV/µs (min) high CMTI
- System-level diagnostic features
- Meets CISPR-11 and CISPR-25 EMI standards
- Safety-related certifications
- 6000VPK reinforced isolation per DIN VDE V 0884-11
- 4250VRMS isolation for 1 Minute per UL1577
- –40°C to +125°C fully specified over the extended industrial temperature range
Applications
- Isolated current sensing in
- Protection relays
- Motor drives
- Power supplies
- Photovoltaic inverters
Additional Resources
Functional Block Diagram
Development Tools
Texas Instruments AMC-AMP-50A-EVM Amplifier Evaluation Module (EVM)
An isolated current-sensing evaluation module designed for ±50A shunt-based current sensing.
Texas Instruments AMC-AMP-200A-EVM Evaluation Module
Isolated current-sensing evaluation module developed for ±200A shunt-based current-sensing
Texas Instruments AMC3301EVM/AMC3302EVM/AMC3330EVM EVMs
Evaluate AMC3301, ANC3302, or AMC3330, an isolated amplifier with an integrated DC/DC converter.