Calculation tool
SBAR013 — Isolated Amplifier Voltage Sensing Excel Calculator
This calculator provides estimates of the errors associated with using isolation amplifier devices in a voltage sensing configuration.
AMC3301-Q1
Automotive, ±250-mV input, precision current sensing reinforced isolated amplifier with int. DC/DC
Data sheet
AMC3301-Q1
- AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to 125°C, TA
- 3.3-V or 5-V single supply with integrated DC/DC converter
- ±250-mV input voltage range optimized for current measurement using shunt resistors
- Fixed gain: 8.2
- Low DC errors:
- Offset voltage: ±150 µV (max)
- Offset drift: ±1 µV/°C (max)
- Gain error: ±0.2% (max)
- Gain error drift: ±40 ppm/°C (max)
- Nonlinearity: ±0.04% (max)
- High CMTI: 85 kV/µs (min)
- System-level diagnostic features
- Meets CISPR-11 and CISPR-25 EMI standards
- Safety-related certifications:
- 6000-VPK reinforced isolation per DIN VDE V 0884-11
- 4250-VRMS isolation for 1 minute per UL1577
The AMC3301-Q1 is a precision, isolated amplifier, 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 1.2 kVRMS.
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 AMC3301-Q1 is optimized for direct connection to a low-impedance shunt resistor or other, low-impedance voltage source with low signal levels. The excellent DC accuracy and low temperature drift supports accurate current measurements in the temperature range from –40°C to +125°C.
The integrated DC/DC converter fault-detection and diagnostic output pin of the AMC3301-Q1 simplify system-level design and diagnostics.
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Evaluation board
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Simulation model
AMC3301 TINA-TI Reference Design (Rev. B)
SBAM440B.TSC (151 KB) - TINA-TI Reference Design
Calculation tool
SBAR020 — Isolated Amplifier Current Sensing Excel Calculator
This calculator provides estimates of the errors associated with using isolation amplifier devices in a current sensing configuration.
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Isolated amplifiers
Simulation tool
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SO-MOD (DWE) | 16 | Ultra Librarian |
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