Overview
The AMC1100DWV, produced by Texas Instruments, is a precision isolation amplifier designed for high-accuracy current and voltage measurements. This device features a fully-differential input and output, separated by a silicon dioxide (SiO2) barrier, which provides galvanic isolation of up to 4250 VPEAK. This isolation ensures that the device can operate in environments with high common-mode voltages without compromising the integrity of the measurement signals. The AMC1100 is particularly optimized for use with shunt resistors in current sensing applications, offering low nonlinearity, low offset error, and low noise characteristics.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | -250 | - | 250 | mV |
| Nonlinearity | - | 0.075% | 0.075% | % |
| Input Offset Voltage | -1.5 | - | 1.5 | mV |
| Input Noise | - | 3.1 | - | mVRMS |
| High-Side Supply Current | - | - | 8 | mA |
| Input Bandwidth | 60 | - | - | kHz |
| Gain | - | 8 | - | - |
| Common-Mode Rejection Ratio (CMRR) | - | 108 | - | dB |
| Operating Temperature Range | -40 | - | 105 | °C |
| Isolation Voltage | - | - | 4250 | VPEAK |
Key Features
- Fully-differential input and output with galvanic isolation up to 4250 VPEAK.
- Low nonlinearity: 0.075% max at 5 V.
- Low offset error: 1.5 mV max.
- Low noise: 3.1 mVRMS typ.
- Low high-side supply current: 8 mA max at 5 V.
- Input bandwidth: 60 kHz min.
- Fixed gain: 8 (0.5% accuracy).
- High common-mode rejection ratio: 108 dB.
- Low-side operation: 3.3 V or 5.0 V.
- Safety-related certifications: UL1577, DIN VDE V 0884-11: 2017-01, and CAN/CSA no. 5A-component acceptance service notice.
Applications
- Shunt resistor-based current sensing in electricity meters.
- String inverters.
- Power measurement applications.
Q & A
- What is the primary function of the AMC1100DWV? The AMC1100DWV is a precision isolation amplifier used for accurate current and voltage measurements, particularly in applications involving shunt resistors.
- What is the isolation voltage of the AMC1100DWV? The AMC1100DWV provides galvanic isolation of up to 4250 VPEAK.
- What is the input voltage range of the AMC1100DWV? The input voltage range is ±250 mV.
- What is the nonlinearity of the AMC1100DWV? The nonlinearity is 0.075% max at 5 V.
- What is the common-mode rejection ratio (CMRR) of the AMC1100DWV? The CMRR is 108 dB.
- What are the safety certifications of the AMC1100DWV? The device is certified to UL1577, DIN VDE V 0884-11: 2017-01, and CAN/CSA no. 5A-component acceptance service notice.
- What is the operating temperature range of the AMC1100DWV? The operating temperature range is -40°C to +105°C.
- What are the typical applications of the AMC1100DWV? Typical applications include shunt resistor-based current sensing in electricity meters, string inverters, and power measurement applications.
- What is the input bandwidth of the AMC1100DWV? The input bandwidth is 60 kHz min.
- How does the AMC1100DWV handle high common-mode voltages? The device prevents noise currents on high common-mode voltage lines from interfering with or damaging sensitive circuitry through its galvanic isolation.
