ADE7762ARWZ Analog Devices Inc, ADE7762ARWZ Datasheet
ADE7762ARWZ
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ADE7762ARWZ Summary of contents
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FEATURES High accuracy supports 50 Hz/60 Hz IEC 62053-21 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 Supplies average active power on the frequency outputs F1 ...
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ADE7762 TABLE OF CONTENTS Features .............................................................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Functional Block Diagram .............................................................. 3 Specifications..................................................................................... 4 Timing Characteristics ................................................................ 5 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. 7 Typical ...
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FUNCTIONAL BLOCK DIAGRAM IAP 7 IAN 8 VAP 18 IBP 9 IBN 10 VBP 17 ICP 11 ICN 12 VCP 4kΩ 2.4V REF 13 AGND REF ADC HPF ADC Ф ADC HPF LPF ADC Ф ADC HPF ...
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ADE7762 SPECIFICATIONS ± 5%, AGND = DGND = 0 V, on-chip reference, CLKIN = 10 MHz Table 1. Parameter 1, 2 ACCURACY Measurement Error on Current Channel Phase Error Between Channels PF = 0.8 ...
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Parameter POWER SUPPLY See the Terminology section for explanation of specifications. 2 See the plots in the Typical Performance Characteristics section. 3 Sample tested during initial release and after any redesign or process changes that ...
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ADE7762 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter V to AGND DGND DD Analog Input Voltage to AGND VAP, VBP, VCP, VN, IAP, IAN, IBP, IBN, ICP, and ICN Reference Input ...
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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 LED_CTRL LED Control Output. The LED_CTRL signal multiplexes the indication of phase drop, phase sequence error, and per phase reverse power on the LED_A, LED_B, ...
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ADE7762 Pin No. Mnemonic Description 21 CLKIN Master Clock for the ADCs and Digital Signal Processing. An external clock can be provided at this logic input. Alternatively, a parallel resonant AT crystal can be connected across CLKIN and CLKOUT to ...
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TYPICAL PERFORMANCE CHARACTERISTICS 0.5 0.4 PHASE C 0.3 PHASE 0.2 PHASE B 0.1 0 –0.1 PHASE A –0.2 –0.3 –0.4 –0.5 0.1 1 CURRENT CHANNEL (% of Full Scale) Figure 5. Error As a Percent ...
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ADE7762 TEST CIRCUIT 1MΩ 220V 1kΩ 10µF 100nF LOAD ABS DD 1kΩ IAP 33nF ADE7762 Rb CF 1kΩ 3 IAN 8 33nF CLKOUT 22 IBP 9 SAME AS ...
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TERMINOLOGY Measurement Error The error associated with the energy measurement made by the ADE7762 is defined by the following formula: Percentage Error = ⎛ Energy Reg istered by ADE7762 – ⎜ ⎜ ⎝ True Energ y Error Between Channels The ...
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ADE7762 THEORY OF OPERATION The six signals from the current and voltage transducers are digitized with ADCs. These ADCs are 16-bit, second-order ∑-Δ devices with an oversampling rate of 833 kHz. This analog input structure greatly simplifies transducer interface by ...
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INSTANTANEOUS POWER SIGNAL V × CURRENT VOLTAGE INSTANTANEOUS POWER SIGNAL V × I × cos(60° VOLTAGE 60° Figure 13. DC Component of Instantaneous Power Signal NONSINUSOIDAL VOLTAGE AND CURRENT The active power calculation method also ...
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ADE7762 ANALOG INPUTS CURRENT CHANNELS The voltage outputs from the current transducers are connected to the ADE7762 current channels, which are fully differential voltage inputs. IAP, IBP, and ICP are the positive inputs for IAN, IBN, and ICN, respectively. The ...
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TYPICAL CONNECTION DIAGRAMS CURRENT CHANNEL CONNECTION Figure 16 shows a typical connection diagram for the current channel (IAN). A current transformer (CT) is the current trans- ducer selected for this example. Notice that the common-mode voltage for the current channel ...
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ADE7762 Figure 18 shows the connections of the ADE7762 analog inputs with the power lines in a 3-phase, 3-wire delta service. Cf Ra* Rb* VR* Rb* ANTIALIASING FILTERS CT PHASE A PHASE C SOURCE Rf CT PHASE B ANTIALIASING FILTERS ...
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POWER SUPPLY MONITOR The ADE7762 contains an on-chip power supply monitor. The power supply ( monitored continuously. At power-up, DD when the supply is less than 4 V ± 2% and V (typical), the outputs of the ADE7762 ...
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ADE7762 PHASE MONITOR The ADE7762 has phase monitoring functions to detect phase dropout, phase sequence error, and reverse polarity using four pins. Phase dropout has the highest priority, and reverse polarity has the lowest priority phase dropout occurs, ...
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B = –120° +120° 80 0° VOLTAGE WAVEFORMS RISING EDGE ZERO CROSSINGS PHASE SEQ/DROP LEDS ARE OFF –120° +120° 80 0° VOLTAGE WAVEFORMS RISING EDGE ...
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ADE7762 HPF AND OFFSET EFFECTS Figure 23 shows the effect of offsets on the active power calculation. An offset on the current channel and the voltage channel contributes a dc component after multiplication, as shown in Figure 23. Because this ...
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DIGITAL-TO-FREQUENCY CONVERSION After multiplication, the digital output of the low-pass filter contains the active power information of each phase. However, because this LPF is not an ideal brick wall filter implementation, the output signal also contains attenuated components at the ...
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ADE7762 ACCUMULATION OF 3-PHASE POWER Power Measurement Considerations Calculating and displaying power information always have some associated ripple that depends on the integration period used in the MCU to determine average power as well as the load. For example, at ...
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TRANSFER FUNCTION FREQUENCY OUTPUTS F1 AND F2 The ADE7762 calculates the product of six voltage signals (on current channel and voltage channel) and then low-pass filters this product to extract active power information. This active power information is then converted ...
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ADE7762 For simplification, assume that Φ = Φ The preceding equation becomes ⎛ π ⎞ ⎛ × × × × ω ⎜ ⎟ ⎜ ...
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SELECTING A FREQUENCY FOR AN ENERGY METER APPLICATION As shown in Table 5, the user can select one of seven frequencies. This frequency selection determines the maximum frequency on F1 and F2. These outputs are intended to be used to ...
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ADE7762 NO-LOAD THRESHOLD The ADE7762 includes an innovative no-load threshold detection scheme that detects if a current input, when multiplied with any of the three voltage inputs, cannot create power larger than a no- load threshold. This threshold represents 0.0075% ...
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... OUTLINE DIMENSIONS 28 0.30 (0.0118) 0.10 (0.0039) COPLANARITY 0.10 ORDERING GUIDE Model Temperature Range 1 ADE7762ARWZ −40°C to +85°C ADE7762ARWZ-RL 1 −40°C to +85°C 1 EVAL-ADE7762EBZ RoHS Compliant Part. 18.10 (0.7126) 17.70 (0.6969) 15 7.60 (0.2992) 7.40 (0.2913) 1 10.65 (0.4193) 14 10.00 (0.3937) 2.65 (0.1043) 2 ...
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ADE7762 NOTES ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05757-0-8/07(0) Rev Page ...