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
±250-mV input, precision current sensing reinforced isolated amplifier with integrated DC/DC
Data sheet
AMC3301
- 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
- Fully specified over the extended industrial temperature range: –40°C to +125°C
The AMC3301 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 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 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 AMC3301 simplify system-level design and diagnostics.
Technical documentation
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Evaluation board
AMC3301EVM — AMC3301 precision reinforced isolated amplifier with integrated DC/DC converter evaluation module
The AMC3301 evaluation module (EVM) is a platform for evaluating the AMC3301 device, a precision isolated amplifier with an integrated DC/DC converter, which powers the high side of the amplifier. AMC3301 is a 7-kV reinforced isolated amplifier designed for use in current shunt measuring (...)
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.
Supported products & hardware
Products
Isolated amplifiers
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 (...)
Reference designs
TIDA-010065 — High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design
This reference design is a simplified architecture for generating an isolated power supply for isolated amplifiers for measuring isolated voltages and currents. A fully integrated DC/DC converter with reinforced isolation operating from a 5-V input with configurable 5-V or 5.4-V output (headroom (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SO-MOD (DWE) | 16 | Ultra Librarian |
Ordering & quality
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