Overview
The MAX71071+T, produced by Analog Devices Inc./Maxim Integrated, is a dual-channel isolated metrology analog-to-digital converter (ADC) designed for high-accuracy measurements in various industrial and energy metering applications. This device is part of the MAX71071/MAX71071H family and is optimized for use with a compatible MAX71xxx host. It provides galvanic isolation through a pulse transformer, ensuring safe and reliable operation in high-voltage environments.
Key Specifications
| Parameter | Description |
|---|---|
| Channels | Dual-channel |
| Resolution | 24-bit |
| Accuracy | 0.1% over 2000:1 dynamic range |
| Standards Compliance | Exceeds IEC 62053/ANSI C12.20 standards |
| Temperature Range | Industrial temperature range |
| Package | 10-pin μMAX® package |
| Power Consumption | Typical 1.4mA |
| Isolation Method | Pulse transformer for power, data, and timing reference |
| On-Chip Components | Rectifier, preamp/ADC channels, bandgap, temperature monitor, PLL, and BIAS block |
Key Features
- Accurate Measurements: Accurately measures voltage and current with 0.1% accuracy over a 2000:1 dynamic range.
- Galvanic Isolation: Provides isolation through a pulse transformer, ensuring safe operation in high-voltage environments.
- On-Chip Temperature Sensor: Enables localized digital temperature compensation.
- Preamp Gain Settings: Three gain settings (4x, 9x, and 14x) controlled by preamp gain control bits.
- Precision Bandgap Reference: Incorporates autozero techniques and production trims to minimize errors.
- PLL and Communication Interface: Locks to incoming power pulses to create reference clocks for the ADC and communications interface.
Applications
- Energy Metering: Suitable for smart meters and other energy measurement devices due to its high accuracy and compliance with industry standards.
- Industrial Automation: Used in industrial control systems where precise voltage and current measurements are critical.
- Power Quality Monitoring: Ideal for monitoring power quality parameters in industrial and commercial settings.
- Medical Devices: Can be used in medical devices requiring isolated and accurate measurements.
Q & A
- What is the MAX71071+T used for?
The MAX71071+T is used for high-accuracy voltage and current measurements in various industrial and energy metering applications.
- What is the resolution of the MAX71071+T ADC?
The MAX71071+T has a 24-bit resolution.
- How does the MAX71071+T achieve galvanic isolation?
The device achieves galvanic isolation through a pulse transformer, which provides power, bidirectional data, and timing reference between the device and the host.
- What standards does the MAX71071+T comply with?
The MAX71071+T exceeds IEC 62053/ANSI C12.20 standards.
- What is the typical power consumption of the MAX71071+T?
The typical power consumption is 1.4mA.
- What package type is the MAX71071+T available in?
The MAX71071+T is available in a 10-pin μMAX® package.
- Does the MAX71071+T have an on-chip temperature sensor?
Yes, the MAX71071+T includes an on-chip temperature sensor for localized digital temperature compensation.
- How many gain settings does the preamp of the MAX71071+T have?
The preamp has three gain settings: 4x, 9x, and 14x.
- What is the purpose of the PLL in the MAX71071+T?
The PLL locks to the incoming power pulses to create reference clocks for the ADC and communications interface.
- Can the MAX71071+T be used in medical devices?
Yes, the MAX71071+T can be used in medical devices requiring isolated and accurate measurements.
