Overview
The AMC3336DWER from Texas Instruments is a high-precision, ±1-V input, reinforced isolated delta-sigma (ΔΣ) modulator. It is designed for high-impedance AC voltage measurements and features an integrated DC/DC converter, allowing single-supply operation from the low-side of the device. This makes it a unique solution for space-constrained applications. The device is optimized for direct connection to a resistor network or other high-impedance voltage-signal sources and offers excellent DC accuracy and low temperature drift over an extended industrial temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 3.3 V or 5 V | V |
| Input Voltage Range | ±1 V | V |
| Input Resistance | 1 GΩ (typ) | Ω |
| Offset Error | ±0.3 mV (max) | mV |
| Offset Drift | ±4 µV/°C (max) | µV/°C |
| Gain Error | ±0.2% (max) | % |
| Gain Drift | ±40 ppm/°C (max) | ppm/°C |
| Common-Mode Transient Immunity (CMTI) | 90 kV/µs (min) | kV/µs |
| Isolation Voltage | 6000-V PEAK, 4250-V RMS for 1 minute | V |
| Operating Temperature Range | –40°C to +125°C | °C |
| Resolution and Dynamic Range | 16 bits, 85 dB at 78 kSPS | bits, dB |
Key Features
- Integrated DC/DC converter for single-supply operation from the low-side of the device, making it suitable for space-constrained applications.
- High CMTI of 90 kV/µs (min) for robust noise immunity.
- Low EMI, meeting CISPR-11 and CISPR-25 standards.
- Safety-related certifications: 6000-V PEAK reinforced isolation per DIN VDE V 0884-11 and 4250-V RMS isolation for 1 minute per UL1577.
- System-level diagnostic features for enhanced reliability.
- Excellent DC accuracy and low temperature drift, supporting accurate voltage measurements over an extended industrial temperature range.
- Ability to achieve 16 bits of resolution with a dynamic range of 85 dB at a data rate of 78 kSPS using a digital filter.
Applications
- Isolated voltage sensing in motor drives.
- Photovoltaic inverters.
- Power delivery systems.
- Protection relays.
- Current shunt measuring applications.
Q & A
- What is the input voltage range of the AMC3336DWER?
The input voltage range is ±1 V, optimized for voltage measurements.
- What is the typical input resistance of the AMC3336DWER?
The typical input resistance is 1 GΩ.
- What are the safety-related certifications of the AMC3336DWER?
The device is certified according to DIN VDE V 0884-11 and UL1577, with 6000-V PEAK reinforced isolation and 4250-V RMS isolation for 1 minute.
- What is the operating temperature range of the AMC3336DWER?
The device is fully specified over the extended industrial temperature range of –40°C to +125°C.
- How does the AMC3336DWER achieve isolation?
The device features a reinforced capacitive isolation barrier that separates parts of the system operating on different common-mode voltage levels, protecting the low-voltage side from hazardous voltages and damage.
- What is the resolution and dynamic range of the AMC3336DWER?
The device can achieve 16 bits of resolution with a dynamic range of 85 dB at a data rate of 78 kSPS using a digital filter.
- Does the AMC3336DWER have built-in diagnostic features?
Yes, the device includes system-level diagnostic features for enhanced reliability.
- Is the AMC3336DWER compliant with EMI standards?
Yes, it meets CISPR-11 and CISPR-25 standards for low EMI.
- What is the typical supply voltage for the AMC3336DWER?
The device operates on a 3.3-V or 5-V single supply with an integrated DC/DC converter.
- What are some common applications of the AMC3336DWER?
Common applications include isolated voltage sensing in motor drives, photovoltaic inverters, power delivery systems, and protection relays.
