Poly Phase Multifunction Energy Metering IC with Per Phase Information
GENERAL DESCRIPTION
The ADE77581 is a high accuracy, 3-phase electrical energy measurement IC with a serial interface and two pulse outputs. The ADE7758 incorporates second-order Σ-Δ ADCs, a digital integrator, reference circuitry, a temperature sensor, and all the signal processing required to perform active, reactive, and apparent energy measurement and rms calculations.
The ADE7758 is suitable to measure active, reactive, and apparent energy in various 3-phase configurations, such as WYE or DELTA services, with both three and four wires. The ADE7758 provides system calibration features for each phase, that is, rms offset correction, phase calibration, and power calibration. The APCF logic output gives active power information, and the VARCF logic output provides instantaneous reactive or apparent power information
FEATURES
Highly accurate; supports IEC 60687, IEC 61036, IEC 61268, IEC 62053-21, IEC 62053-22, and IEC 62053-23
Compatible with 3-phase/3-wire, 3-phase/4-wire, and other 3-phase services
Less than 0.1% active energy error over a dynamic range of 1000 to 1 at 25ฐC
Supplies active/reactive/apparent energy, voltage rms, current rms, and sampled waveform data
Two pulse outputs, one for active power and the other selectable between reactive and apparent power with programmable frequency
Digital power, phase, and rms offset calibration
On-chip, user-programmable thresholds for line voltage SAG and overvoltage detections
An on-chip, digital integrator enables direct interface-to-current sensors with di/dt output
A PGA in the current channel allows direct interface to shunts and current transformers
An SPIฎ-compatible serial interface with IRQ
Proprietary ADCs and DSP provide high accuracy over large variations in environmental conditions and time
Reference 2.4 V (drift 30 ppm/ฐC typical) with external overdrive capability
Single 5 V supply, low power (70 mW typical)
http://www.analog.com/static/imported-files/data_sheets/ADE7758.pdf
MCP3909
Energy Metering IC with SPI Interface and Active Power Pulse Output
Description
The MCP3909 device is an energy-metering IC
designed to support the IEC 62053 international
metering standard specification. It supplies a frequency
output proportional to the average active real power,
with simultaneous serial access to ADC channels and
multiplier output data. This output waveform data is
available at up to 14 kHz with 16-bit ADC output and
20-bit multiplier output words. The 16-bit, delta-sigma
ADCs allow for a wide range of IB and IMAX currents
and/or small shunt
Features
• Supports IEC 62053 International Energy
Metering Specification and legacy IEC 1036/
61036/687 Specifications
• Digital waveform data access through SPI
interface
- 16-bit Dual ADC output data words
- 20-bit Multiplier output data word
• Dual functionality pins support serial interface
access and simultaneous Active Power Pulse
Output
• Two 16-bit second order delta-sigma
Analog-to-Digital Converters (ADCs) with multi-bit
DAC
- 81 dB SINAD (typ.) both channels
• 0.1% typical active energy measurement error
over 1000:1 dynamic range
• PGA for small signal inputs supports low value
shunt current sensor
• Ultra-low drift on-chip reference:
15 ppm/°C (typical)
• Direct drive for electromagnetic mechanical
counter and two-phase stepper motors
• Low IDD of 4 mA (maximum)
• Tamper output pin for negative power indication
• Industrial Temperature Range: -40°C to +85°C
http://ww1.microchip.com/downloads/en/DeviceDoc/22025b.pdf
GENERAL DESCRIPTION
The ADE7752 is a high accuracy polyphase electrical energy measurement IC.
The ADE7752A is a pin-to-pin compatible low power version of ADE7752. The functions of ADE7752 and ADE7752A are the same. Both products are referred to in the text of this data sheet as ADE7752. The part specifications surpass the accuracy requirements as quoted in the IEC62053-2x standard. The only analog circuitry used in the ADE7752 is in the analog-to-digital converters (ADCs) and reference circuit. All other signal processing (such as multi-plication, filtering, and summation) is carried out in the digital domain. This approach provides superior stability and accuracy over extremes in environmental conditions and over time.
FEATURES
High accuracy, supports 50 Hz/60 Hz IEC62053-2x
Less than 0.1% error over a dynamic range of 500 to 1
Compatible with 3-phase/3-wire delta and 3-phase/4-wire Wye configurations
The ADE77521 supplies average real power on frequency outputs F1 and F2
High frequency output CF is intended for calibration and supplies instantaneous real power
Logic output REVP indicates a potential miswiring or negative power for each phase Direct drive for electromechanical counters and 2-phase stepper motors (F1 and F2)
Proprietary ADCs and DSP provide high accuracy over large variations in environmental conditions and time On-chip power supply monitoring
On-chip creep protection (no load threshold) On-chip reference 2.4 V ฑ8% (20 ppm/ฐC typical) with external overdrive capability
Single 5 V supply, low power 60 mW typical: ADE7752 30 mW typical: ADE7752A
Low cost CMOS process
http://www.analog.com/static/imported-files/data_sheets/ADE7752_7752A.pdf
