Texas Instruments AMC0100R Functionally Isolated Amplifier
Texas Instruments AMC0100R Functionally Isolated Amplifier is a precision, galvanically isolated amplifier with a ±250mV differential input and a single-ended, ratiometric output. The input is optimized for direct connection to a shunt resistor or other low-impedance signal source. The isolation barrier separates parts of the system that operate on different common-mode voltage levels or noise-sensitive circuitry from power stages. The isolation barrier supports a working voltage of up to 200VRMS/280VDC and transient overvoltages of up to 570VRMS/800VDC (60s).
The Texas Instruments AMC0100R outputs a single-ended signal proportional to the input voltage. The full-scale output is set by the voltage applied to the REFIN pin. The output of the AMC0100R is designed to connect directly to the input of an ADC. Connect REFIN to the same reference voltage as the ADC to match the dynamic input voltage range of the ADC. The AMC0100R is available in an 8-pin, 0.65mm pitch VSON package and is fully specified over the temperature range from –40°C to +125°C.
Features
- ±250mV linear input voltage range
- Supply voltage range
- High-side (VDD1): 3.0V to 5.5V
- Low-side (VDD2): 3.0V to 5.5V
- Single-ended, ratiometric output with a reference input of 2.7V to 5.5V
- Low DC errors
- Offset error: ±0.25mV (max.)
- Offset drift: ±1µV/°C (max.)
- Gain error: ±0.25% (max.)
- Gain drift: ±35ppm/°C (max.)
- Nonlinearity: 0.04% (max.)
- 150V/ns (min.) high CMTI
- Low EMI that meets CISPR-11 and CISPR-25 standards
- Functional Isolation
- 200VRMS, 280VDC working voltage
- 570VRMS, 800VDC transient overvoltage (60s)
- Fully specified over the extended industrial temperature range of –40°C to +125°C
Applications
- 48V motor drives
- 48V frequency inverters
- Analog input modules
- Power supplies
Functional Block Diagram
