Overview
The AMC3302DWER, produced by Texas Instruments, is a high-precision, isolated amplifier designed for shunt-based current measurements. This device is optimized for applications requiring accurate current sensing in harsh environments. It features a fully integrated, isolated DC/DC converter, allowing single-supply operation from the low-side of the device, which is particularly beneficial for space-constrained applications. The AMC3302DWER is certified for reinforced capacitive isolation, ensuring safety and reliability by separating parts of the system operating at different common-mode voltage levels and protecting the low-voltage side from hazardous voltages.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Low-side Power Supply (VDD) | 3.0 | 3.3 | 5.5 | V |
| Differential Input Voltage Range | -50 | 50 | mV | |
| Absolute Common-mode Input Voltage | -2 | 1 | V | |
| Operating Ambient Temperature Range | -40 | 125 | °C | |
| Low-side Supply Current (IDD) | 27.5 | 40 | mA | |
| Maximum Power Dissipation | 231 | mW | ||
| Output Bandwidth | 290 | kHz | ||
| Isolation Working Voltage | 1200 | VRMS |
Key Features
- 3.3-V or 5-V single supply with integrated DC/DC converter for isolated power.
- ±50-mV input voltage range optimized for current measurements using shunt resistors.
- Reinforced capacitive isolation barrier certified according to VDE V 0884-11 and UL1577, supporting up to 1.2 kVRMS working voltage.
- Excellent DC accuracy and low temperature drift over an extended industrial temperature range (-40°C to +125°C).
- Integrated DC/DC converter fault-detection and diagnostic output pin for simplified system-level design and diagnostics.
- Low impedance input suitable for direct connection to low-impedance shunt resistors or other low-impedance voltage sources.
Applications
- Motor drives: For accurate current sensing in motor control systems.
- Power supplies: To monitor and control current in power supply units.
- Photovoltaic inverters: For current measurement and monitoring in solar power systems.
Q & A
- What is the primary function of the AMC3302DWER? The AMC3302DWER is a precision, isolated amplifier optimized for shunt-based current measurements.
- What are the supported power supply voltages for the AMC3302DWER? The device supports 3.3-V or 5-V single supply operation.
- What is the isolation working voltage of the AMC3302DWER? The isolation working voltage is up to 1.2 kVRMS.
- What are the key certifications for the isolation barrier of the AMC3302DWER? The isolation barrier is certified according to VDE V 0884-11 and UL1577.
- What is the operating temperature range of the AMC3302DWER? The device operates over an ambient temperature range of -40°C to +125°C.
- How does the integrated DC/DC converter benefit the AMC3302DWER? The integrated DC/DC converter allows single-supply operation and simplifies system-level design and diagnostics with fault-detection and diagnostic output.
- What types of applications is the AMC3302DWER suitable for? It is suitable for motor drives, power supplies, and photovoltaic inverters.
- What is the typical output bandwidth of the AMC3302DWER? The typical output bandwidth is 290 kHz.
- How does the AMC3302DWER ensure safety in harsh environments? It ensures safety through reinforced capacitive isolation, protecting the low-voltage side from hazardous voltages.
- What is the maximum power dissipation of the AMC3302DWER? The maximum power dissipation is 231 mW at VDD = 5.5 V.
