Overview
The AMC1302DWVR is a precision, isolated amplifier produced by Texas Instruments. This device features an output separated from the input circuitry by an isolation barrier that is highly resistant to magnetic interference. The isolation barrier provides reinforced galvanic isolation of up to 5 kV RMS according to VDE V 0884-11 and UL1577, and supports a working voltage of up to 1.5 kV RMS. This isolation protects the low-voltage side from hazardous voltages and damage, making it suitable for applications requiring high safety standards.
The AMC1302 is optimized for direct connection to a low-impedance shunt resistor or other low-impedance voltage source with low signal levels. It offers excellent DC accuracy and low temperature drift, supporting accurate current control in various industrial applications over an extended temperature range from –40°C to +125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | ±50 mV | mV |
| Fixed Gain | 41 | V/V |
| Offset Error | ±50 µV (maximum) | µV |
| Offset Drift | ±0.8 µV/°C (maximum) | µV/°C |
| Gain Error | ±0.2% (maximum) | % |
| Gain Drift | ±35 ppm/°C (maximum) | ppm/°C |
| Nonlinearity | 0.03% (maximum) | % |
| Operating Temperature Range | –55 to 125 | °C |
| Supply Voltage (High-side and Low-side) | 3.3 V or 5 V | V |
| Package Type | SOIC (8 pins) | - |
| Body Size (Nominal) | 5.85 mm × 7.50 mm | mm |
| Common-mode Transient Immunity (CMTI) | 100 kV/µs (minimum) | kV/µs |
| Output Bandwidth | 220 to 280 kHz | kHz |
| Output Resistance | < 0.2 Ω | Ω |
Key Features
- ±50-mV input voltage range optimized for shunt-based current measurements
- Fixed gain of 41
- Low DC errors: offset error, offset drift, gain error, and gain drift
- 3.3-V or 5-V operation on high-side and low-side
- Fail-safe output
- High common-mode transient immunity (CMTI): 100 kV/µs (minimum)
- Low EMI, meets CISPR-11 and CISPR-25 standards
- Safety-related certifications: 7071-V PK reinforced isolation per DIN VDE V 0884-11: 2017-01, 5000-V RMS isolation for 1 minute per UL1577
- Integrated missing-shunt and missing high-side supply detection features
Applications
- Isolated current sensing in protection relays
- Motor drives
- Power supplies
- Photovoltaic inverters
- PFC stages, DC/DC converters, AC-motor and servo drives
Q & A
- What is the input voltage range of the AMC1302?
The input voltage range of the AMC1302 is ±50 mV, optimized for shunt-based current measurements.
- What is the fixed gain of the AMC1302?
The fixed gain of the AMC1302 is 41.
- What are the key DC error specifications of the AMC1302?
The AMC1302 has low DC errors including offset error (±50 µV maximum), offset drift (±0.8 µV/°C maximum), gain error (±0.2% maximum), and gain drift (±35 ppm/°C maximum).
- What are the operating voltage options for the AMC1302?
The AMC1302 can operate with 3.3-V or 5-V supplies on both the high-side and low-side.
- What safety certifications does the AMC1302 have?
The AMC1302 has safety-related certifications including 7071-V PK reinforced isolation per DIN VDE V 0884-11: 2017-01 and 5000-V RMS isolation for 1 minute per UL1577.
- What is the common-mode transient immunity (CMTI) of the AMC1302?
The AMC1302 has a high CMTI of 100 kV/µs (minimum).
- Does the AMC1302 meet any EMI standards?
Yes, the AMC1302 meets CISPR-11 and CISPR-25 EMI standards.
- What is the operating temperature range of the AMC1302?
The AMC1302 is fully specified over the extended industrial temperature range from –40°C to +125°C.
- What are some of the integrated detection features of the AMC1302?
The AMC1302 includes integrated missing-shunt and missing high-side supply detection features to simplify system-level design and diagnostics.
- What is the output bandwidth of the AMC1302?
The output bandwidth of the AMC1302 is between 220 kHz and 280 kHz.
- What is the output resistance of the AMC1302?
The output resistance of the AMC1302 is less than 0.2 Ω.
