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.
AMC0381R-Q1
- AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, TA
- Integrated, high-voltage resistive divider for direct DC voltage sensing without external resistors
- Single-ended output, ratiometric to VREFIN
- Reference input: 2.7V to 5.5V
- Supply voltage range:
- High-side (VDD1): 3.0V to 5.5V
- Low-side (VDD2): 3.0V to 5.5V
- Low DC errors:
- Offset error: ±1.5mV (maximum)
- Offset drift: ±20µV/°C (maximum)
- Attenuation error: ±0.25% (maximum)
- Attenuation drift: ±40ppm/°C (maximum)
- Nonlinearity: 0.025% (maximum)
- High CMTI: 150V/ns (minimum)
- Low EMI: Meets CISPR-11 and CISPR-25 limits
- Available input options:
- AMC0381R06-Q1: 600V, 10MΩ
- AMC0381R10-Q1: 1000V, 12.5MΩ
- AMC0381R16-Q1: 1600V, 33.5MΩ
- Safety-related certifications:
- 7000VPK reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17)
- 5000VRMS isolation for 1 minute per UL 1577
The AMC0381R-Q1 is a precision, galvanically isolated amplifier with a high-voltage DC, high impedance input, and single-ended ratiometric output. The input is designed to connect directly to a high-voltage signal source.
The isolation barrier separates parts of the system that operate on different common-mode voltage levels. The isolation barrier is highly resistant to magnetic interference and is certified to provide reinforced isolation up to 5kVRMS (60s).
The AMC0381R-Q1 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 AMC0381R-Q1 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 AMC0381R-Q1 is available in three linear input voltage ranges: 600V, 1000V, and 1600V. With an integrated precision resistive divider, the AMC0381R-Q1 achieves better than 1% accuracy over the full temperature range, including lifetime drift.
The AMC0381R-Q1 is available in a 15-pin, 0.65mm pitch SSOP package. The device is fully specified over the temperature range from –40°C to +125°C.
Technical documentation
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View all 3 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | AMC0381R-Q1 Automotive, Precision, High-Voltage DC Input, Reinforced Isolated Amplifier With Single-Ended Ratiometric Output datasheet | PDF | HTML | 19 Nov 2025 |
| Application note | Isolated Converters CISPR25 Radiated Emissions | PDF | HTML | 13 Oct 2025 | |
| Application note | Pairing Isolated Amplifiers With SAR AD Converters | PDF | HTML | 24 Sep 2025 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
AMC038XEVM — AMC038x evaluation module
The AMC038x evaluation module (EVM), in conjunction with one of the AMC038x devices, demonstrates a high-precision, high-voltage sensing design. The evaluation module is capable of measuring up to 1600V input voltages with no external voltage dividor resistors needed. The design also includes a (...)
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.
Supported products & hardware
Products
Isolated amplifiers
Isolated ADCs
Precision ADCs
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SSOP (DFX) | 15 | Ultra Librarian |
Ordering & quality
Information included:
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- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
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Information included:
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