Overview
The AMC1302DWV is a precision, isolated amplifier produced by Texas Instruments. It features an output separated from the input circuitry by an isolation barrier highly resistant to magnetic interference. This 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. The amplifier is optimized for direct connection to a low-impedance shunt resistor or other low-impedance voltage source with low signal levels, making it ideal for accurate current control in various industrial applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | ±50 mV | |
| Fixed Gain | 41 | |
| Offset Error | ±50 µV (maximum) | |
| Offset Drift | ±0.8 µV/°C (maximum) | |
| Gain Error | ±0.2% (maximum) | |
| Gain Drift | ±35 ppm/°C (maximum) | |
| Nonlinearity | 0.03% (maximum) | |
| Operating Voltage | 3.3 V or 5 V | |
| Operating Temperature Range | –40°C to +125°C | |
| Package Type | SOIC (DWV) with 8 pins | |
| CMTI (Common Mode Transient Immunity) | 100 kV/µs (minimum) | |
| Isolation Voltage | Up to 5 kV RMS |
Key Features
- ±50-mV input voltage range optimized for shunt-based current measurements
- Fixed gain of 41
- Low DC errors: offset error ±50 µV, offset drift ±0.8 µV/°C, gain error ±0.2%, gain drift ±35 ppm/°C, nonlinearity 0.03%
- 3.3-V or 5-V operation on high-side and low-side
- Fail-safe output
- High 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
- Shunt-resistor-based current sensing in motor drives, frequency inverters, and uninterruptible power supplies
- Accurate current control in PFC stages, DC/DC converters, AC-motor, and servo drives
- Industrial systems requiring high isolation and low DC errors
Q & A
- What is the input voltage range of the AMC1302DWV?
The input voltage range is ±50 mV, optimized for shunt-based current measurements.
- What is the fixed gain of the AMC1302DWV?
The fixed gain is 41.
- What are the key DC error specifications of the AMC1302DWV?
The key DC error specifications include offset error ±50 µV, offset drift ±0.8 µV/°C, gain error ±0.2%, gain drift ±35 ppm/°C, and nonlinearity 0.03%.
- What are the operating voltage options for the AMC1302DWV?
The AMC1302DWV can operate with 3.3 V or 5 V on both high-side and low-side.
- What is the common-mode transient immunity (CMTI) of the AMC1302DWV?
The CMTI is 100 kV/µs (minimum).
- What safety certifications does the AMC1302DWV have?
The AMC1302DWV 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 operating temperature range of the AMC1302DWV?
The operating temperature range is –40°C to +125°C.
- What package type is the AMC1302DWV available in?
The AMC1302DWV is available in a SOIC (DWV) package with 8 pins.
- Does the AMC1302DWV have integrated diagnostic features?
Yes, it includes integrated missing-shunt and missing high-side supply detection features.
- What are some typical applications of the AMC1302DWV?
Typical applications include shunt-resistor-based current sensing in motor drives, frequency inverters, and uninterruptible power supplies, as well as accurate current control in PFC stages, DC/DC converters, AC-motor, and servo drives.
- Does the AMC1302DWV meet EMI standards?
Yes, it meets CISPR-11 and CISPR-25 standards for low EMI.
