Overview
The ADE7757ARNZ, produced by Analog Devices Inc., is a high-accuracy electrical energy measurement integrated circuit designed for single-phase energy metering applications. This IC is a pin reduction version of the ADE7755, offering enhanced precision and functionality. It integrates proprietary ADCs and DSP to provide accurate measurements over a wide range of environmental conditions and time. The ADE7757 is suitable for applications requiring high accuracy and reliability in energy measurement.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Supply Voltage (VDD) | 4.75 V min, 5 V ± 5%, 5.25 V max | V | For specified operation |
| Current Consumption (IDD) | Typically 4 mA, max 5 mA | mA | At VDD = 5 V |
| Operating Temperature | -40°C to +85°C | °C | |
| Measurement Error on Channel V1 | 0.1% typ | % | Over a dynamic range of 500 to 1, full-scale signal (±165 mV), 25°C |
| Phase Error between Channels | ±0.1 degrees max | ° | Line frequency = 45 Hz to 65 Hz |
| Output Frequencies (F1 and F2) | Proportional to average active power | Hz | Direct drive for electromechanical counters and 2-phase stepper motors |
| High Frequency Output (CF) | 90 ms wide active high pulse, frequency proportional to active power | Hz | For calibration and communication purposes |
| Package Type | 16-lead SOIC narrow-body |
Key Features
- High accuracy electrical energy measurement with a measurement error of 0.1% over a dynamic range of 500 to 1.
- Integrated oscillator and on-chip power supply monitoring circuit.
- On-chip creep protection (no-load threshold) and internal phase matching circuitry to ensure phase alignment between voltage and current channels.
- High-pass filter in the current channel to eliminate dc offsets and ensure accurate active power calculations.
- External overdrive capability for the on-chip 2.5 V reference (20 ppm/°C typical).
- Low power consumption (typically 4 mA) and single 5 V supply operation.
- Logic outputs (F1, F2, and CF) for direct drive of electromechanical counters, 2-phase stepper motors, and calibration purposes.
- Internal ESD protection circuitry on analog inputs, sustaining overvoltage of ±6 V without permanent damage.
Applications
- Single-phase energy metering systems requiring high accuracy and reliability.
- Smart meters and advanced metering infrastructure (AMI) applications.
- Industrial and commercial energy monitoring systems.
- Automated meter reading (AMR) and meter data management systems.
- Energy management and control systems in various industries.
Q & A
- What is the primary function of the ADE7757ARNZ IC?
The ADE7757ARNZ is designed for high-accuracy electrical energy measurement in single-phase applications.
- What is the supply voltage range for the ADE7757ARNZ?
The supply voltage range is 4.75 V to 5.25 V, with a nominal voltage of 5 V ± 5%.
- What is the typical current consumption of the ADE7757ARNZ?
The typical current consumption is 4 mA, with a maximum of 5 mA at VDD = 5 V.
- What is the operating temperature range of the ADE7757ARNZ?
The operating temperature range is -40°C to +85°C.
- How accurate is the measurement error of the ADE7757ARNZ?
The measurement error is typically 0.1% over a dynamic range of 500 to 1.
- What is the purpose of the high frequency output (CF) in the ADE7757ARNZ?
The high frequency output (CF) is intended for calibration and communication purposes, providing instantaneous real power information).
- Does the ADE7757ARNZ have built-in protection against overvoltage?
Yes, the ADE7757ARNZ has internal ESD protection circuitry on its analog inputs, which can sustain overvoltage of ±6 V without permanent damage).
- What type of package does the ADE7757ARNZ come in?
The ADE7757ARNZ comes in a 16-lead SOIC narrow-body package).
- Can the ADE7757ARNZ directly drive electromechanical counters and stepper motors?
Yes, the logic outputs (F1 and F2) can directly drive electromechanical counters and 2-phase stepper motors).
- Does the ADE7757ARNZ have on-chip power supply monitoring?
Yes, the ADE7757ARNZ includes an on-chip power supply monitoring circuit on the VDD supply pin).
