Overview
The AD7755AAN, produced by Analog Devices Inc., is a high-accuracy electrical energy measurement IC designed to meet the stringent requirements of energy metering applications. This component is particularly notable for its compliance with the IEC 687/1036 standard, ensuring high accuracy over a wide dynamic range. The AD7755AAN integrates advanced analog-to-digital converters (ADCs) and digital signal processing (DSP) to provide superior stability and accuracy across various environmental conditions and over time.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Supply Voltage (AVDD, DVDD) | 5 V ± 5% | V | Typical operating voltage |
| Power Consumption | 15 mW | mW | Typical at 5 V supply |
| Accuracy | < 0.1% Error | % | Over a dynamic range of 500 to 1 |
| Operating Temperature | -40°C to +85°C | °C | Full operating range |
| Reference Voltage | 2.5 V ± 6% | V | On-chip reference with external overdrive capability |
| Frequency Outputs | F1, F2 (low frequency), CF (high frequency) | - | For average and instantaneous real power information |
| Package Options | 24-lead DIP and SSOP | - | Available package types |
Key Features
- High accuracy electrical energy measurement compliant with IEC 687/1036 standard.
- Supports 50 Hz/60 Hz frequency.
- On-chip power supply monitoring and creep protection.
- Direct drive capability for electromechanical counters and two-phase stepper motors.
- Programmable gain amplifier (PGA) in the current channel for use with small shunt and burden resistances.
- Single 5 V supply operation with low power consumption.
- Internal phase matching circuitry and no-load threshold to prevent creep.
Applications
- Energy metering systems.
- Smart grid applications.
- Industrial power monitoring.
- Automated meter reading (AMR) systems.
- Watt-hour meters and other precision energy measurement devices.
Q & A
- What is the primary function of the AD7755AAN?
The AD7755AAN is a high-accuracy electrical energy measurement IC designed for energy metering applications. - What standards does the AD7755AAN comply with?
The AD7755AAN complies with the IEC 687/1036 standard. - What is the typical power consumption of the AD7755AAN?
The typical power consumption is 15 mW at a 5 V supply. - What are the operating temperature ranges for the AD7755AAN?
The operating temperature range is -40°C to +85°C. - What types of outputs does the AD7755AAN provide?
The AD7755AAN provides low frequency outputs (F1 and F2) for average real power and a high frequency output (CF) for instantaneous real power. - Can the AD7755AAN directly drive electromechanical counters?
Yes, the AD7755AAN can directly drive electromechanical counters and two-phase stepper motors. - What is the purpose of the PGA in the current channel?
The PGA allows the use of small values of shunt and burden resistance. - Does the AD7755AAN have on-chip power supply monitoring?
Yes, the AD7755AAN includes on-chip power supply monitoring. - What package options are available for the AD7755AAN?
The AD7755AAN is available in 24-lead DIP and SSOP packages. - How does the AD7755AAN handle no-load conditions?
The AD7755AAN has an internal no-load threshold to prevent creep when there is no load.
