Overview
The ADE7753ARS, produced by Analog Devices Inc., is a high-accuracy, single-phase multifunction energy metering IC. This integrated circuit is designed to measure active and apparent power, energy, and other electrical parameters with high precision. It features a serial interface and a pulse output frequency proportional to the active power, making it suitable for various energy metering applications.
The IC includes two second-order sigma-delta analog-to-digital converters (ADCs), on-chip reference circuitry, and a temperature sensor. It also incorporates all the necessary signal processing to perform accurate power and energy measurements. The ADE7753ARS is particularly useful in watt-hour meters and other energy measurement devices.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Supply Voltage (AVDD, DVDD) | 5 V ± 5% | Typical operation |
| Operating Temperature Range | -40°C to +85°C | TMIN to TMAX |
| Sampling Clock Frequency | CLKIN/4 (e.g., 3.579545 MHz / 4) | For Σ-Δ modulator |
| Analog Input Range (Channel 1) | ±0.5 V full scale ±4% typ | With respect to AGND |
| Power Supply Rejection Ratio (PSRR) | Measurement error percentage when supplies are varied | DC and AC PSR measurements |
| Temperature Measurement Resolution | Approximately 1.5 LSB/°C | Uncalibrated, with ±25°C offset tolerance |
| Package Type | 20-SSOP |
Key Features
- High Accuracy Energy Measurement: The ADE7753ARS provides high accuracy in measuring active and apparent power, energy, and other electrical parameters.
- Serial Interface and Pulse Output: It features a serial interface for data communication and a pulse output frequency proportional to the active power.
- On-Chip Reference and Temperature Sensor: Includes on-chip reference circuitry and a temperature sensor for comprehensive measurements.
- Phase Correction Networks: Incorporates phase correction networks to ensure phase match between channels, correcting phase to within ±0.4° over a range of 45 Hz to 65 Hz.
- Power Supply Monitoring: Continuously monitors the analog supply voltage and goes into an inactive state if the supply voltage drops below 4 V ± 5%.
- Line Voltage Sag Detection: Can detect when the absolute value of the line voltage drops below a certain peak value.
- Digital Integrator: Allows for simple interfacing with di/dt sensors like Rogowski coils.
Applications
- Watt-Hour Meters: The ADE7753ARS is specifically designed for use in watt-hour meters and other energy measurement devices.
- Energy Metering Systems: Suitable for single-phase energy metering systems requiring high accuracy and reliability.
- Smart Grid Applications: Can be used in smart grid systems for advanced power monitoring and management.
- Industrial Power Monitoring: Useful in industrial settings for monitoring and controlling electrical power consumption.
Q & A
- What is the primary function of the ADE7753ARS?
The primary function of the ADE7753ARS is to measure active and apparent power, energy, and other electrical parameters with high accuracy.
- What type of ADCs does the ADE7753ARS use?
The ADE7753ARS uses two second-order sigma-delta (Σ-Δ) analog-to-digital converters (ADCs).
- What is the operating temperature range of the ADE7753ARS?
The operating temperature range of the ADE7753ARS is -40°C to +85°C.
- How does the ADE7753ARS monitor power supply voltage?
The ADE7753ARS continuously monitors the analog supply voltage and goes into an inactive state if the supply voltage drops below 4 V ± 5%.
- What is the purpose of the phase correction networks in the ADE7753ARS?
The phase correction networks ensure a phase match between channels, correcting the phase to within ±0.4° over a range of 45 Hz to 65 Hz.
- Can the ADE7753ARS detect line voltage sag?
Yes, the ADE7753ARS can detect when the absolute value of the line voltage drops below a certain peak value.
- How is temperature measurement handled in the ADE7753ARS?
The ADE7753ARS initiates a temperature measurement on the next zero crossing, and the resulting code is processed and placed in the temperature register.
- What is the resolution of the temperature measurement in the ADE7753ARS?
The temperature measurement resolution is approximately 1.5 LSB/°C, though it is uncalibrated with an offset tolerance as high as ±25°C.
- What type of package does the ADE7753ARS come in?
The ADE7753ARS comes in a 20-SSOP package.
- How can the ADE7753ARS be evaluated for end applications?
The ADE7753ARS can be evaluated using the EVAL-ADE7753 evaluation board, which allows connection to test benches or high voltage test circuits.
