Overview
The AMC1336DWVR, produced by Texas Instruments, is a precision, delta-sigma (ΔΣ) modulator designed for high-precision voltage sensing applications. This device features a unique bipolar input voltage range of ±1 V and high input resistance of 1.5 GΩ, making it suitable for direct connection to resistive dividers in high-voltage applications. The AMC1336 is reinforced with a capacitive double isolation barrier, providing up to 8000 VPEAK isolation according to DIN VDE V 0884-11 and UL1577 standards. This isolation protects lower-voltage parts of the system from damage and ensures reliable operation in environments with different common-mode voltage levels.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | ±1 V | V |
| Input Resistance | 1.5 GΩ (typ) | Ω |
| Offset Error | ±0.5 mV (max) | mV |
| Offset Drift | ±4 µV/°C (max) | µV/°C |
| Gain Error | ±0.25% (max) | % |
| Gain Drift | ±40 ppm/°C (max) | ppm/°C |
| Transient Immunity | 115 kV/µs (typ) | kV/µs |
| High-Side Supply Voltage | 3.3 V or 5 V | V |
| Isolated Digital Interface Supply Voltage | 3.0 V, 3.3 V, or 5 V | V |
| Operating Temperature Range | –40°C to +125°C | °C |
| Isolation Voltage | 8000 VPEAK, 5700 VRMS | V |
Key Features
- High-Precision Voltage Sensing: Optimized for voltage measurements with excellent DC performance, including low offset error, offset drift, gain error, and gain drift.
- Reinforced Isolation: Provides up to 8000 VPEAK isolation according to DIN VDE V 0884-11 and UL1577 standards, ensuring protection of lower-voltage parts.
- Wide Input Voltage Range: Bipolar input voltage range of ±1 V and high input resistance support direct connection to resistive dividers in high-voltage applications.
- High Resolution and Dynamic Range: Achieves 16 bits of resolution with a dynamic range of 87 dB at a data rate of 82 kSPS when used with a digital filter.
- Transient Immunity: Offers high transient immunity of 115 kV/µs (typ).
- Missing High-Side Supply Detection: Includes a feature for detecting missing high-side supply.
- Safety Certifications: Compliant with IEC 62368-1 end equipment standard and certified according to DIN VDE V 0884-11 and UL1577.
Applications
- Isolated AC and DC Voltage Measurement: Used in uninterruptible power supplies, photovoltaic inverters, and motor drives.
- High-Voltage Applications: Suitable for use in systems requiring direct connection to resistive dividers.
- Industrial and Automotive Systems: Operates over an extended industrial temperature range, making it suitable for various industrial and automotive applications.
Q & A
- What is the input voltage range of the AMC1336?
The input voltage range of the AMC1336 is ±1 V.
- What is the typical input resistance of the AMC1336?
The typical input resistance of the AMC1336 is 1.5 GΩ.
- What are the safety certifications for the AMC1336?
The AMC1336 is certified according to DIN VDE V 0884-11, UL1577, and complies with the IEC 62368-1 end equipment standard.
- What is the maximum isolation voltage of the AMC1336?
The maximum isolation voltage of the AMC1336 is 8000 VPEAK and 5700 VRMS.
- What is the operating temperature range of the AMC1336?
The operating temperature range of the AMC1336 is –40°C to +125°C.
- How does the AMC1336 achieve high resolution and dynamic range?
The AMC1336 achieves 16 bits of resolution with a dynamic range of 87 dB at a data rate of 82 kSPS when used with a digital filter.
- What is the transient immunity of the AMC1336?
The transient immunity of the AMC1336 is 115 kV/µs (typ).
- Does the AMC1336 have a feature for detecting missing high-side supply?
Yes, the AMC1336 includes a feature for detecting missing high-side supply.
- What are some common applications of the AMC1336?
The AMC1336 is commonly used in isolated AC and DC voltage measurement applications such as uninterruptible power supplies, photovoltaic inverters, and motor drives.
- How is the AMC1336 powered?
The high-side of the AMC1336 is supplied by a 3.3-V or 5-V power supply, while the isolated digital interface operates from a 3.0-V, 3.3-V, or 5-V power supply.
