Texas Instruments AMC1351/AMC1351-Q1 Precision Isolated Amplifiers

Texas Instruments AMC1351/AMC1351-Q1 Precision Isolated Amplifiers come with an output separated from the input circuitry by an isolation barrier that is highly resistant to magnetic interference. This barrier is certified to provide reinforced galvanic isolation of up to 5kV_RMS according to VDE V 0884-11 and UL1577. It also supports a working voltage of up to 1.5kV_RMS. The isolation barrier separates parts of the system that operate on different common-mode voltage levels and protects the low-voltage side from potentially harmful voltages and damage.

The high-impedance input of the Texas Instruments AMC1351/AMC1351-Q1 is optimized for connection to high-impedance resistive dividers or other voltage signal sources with high output resistance. The excellent accuracy and low-temperature drift support accurate AC and DC voltage sensing in DC/DC converters, frequency inverters, AC motor, and servo-drive applications over the extended industrial temperature range from –40°C to +125°C. The AMC1351-Q1 devices are AEC-Q100 qualified for automotive applications.

Features

-0.25V to 5V linear input voltage range
1.25MΩ (typ.) high input impedance
0.4V/V fixed gain
Low DC errors
- ±1.5mV (max.) offset error
- ±15µV/°C (max.) offset drift
- ±0.2% (max.) gain error
- ±35ppm/°C (max.) gain drift
- Nonlinearity ±0.02% (max.)

Operation on high-side and low-side (3.3V or 5V)
High CMTI (100kV/µs (min.))
Fail-safe output
Safety-related certifications
- 7070V_PK reinforced isolation per DIN VDE V 0884-11: 2017-01
- 5000V_RMS isolation for 1 minute per UL1577
Fully specified over the extended industrial temperature range (–40°C to +125°C)

Applications

Isolated AC voltage sensing in
- Motor drives
- Frequency inverters
- Solar inverters
- Power supplies

Texas Instruments AMC1351/AMC1351-Q1 Precision Isolated Amplifiers

Features

Applications

Functional Block Diagram

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