ADE7761ARS-REF Analog Devices Inc, ADE7761ARS-REF Datasheet
ADE7761ARS-REF
Specifications of ADE7761ARS-REF
Related parts for ADE7761ARS-REF
ADE7761ARS-REF Summary of contents
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FEATURES High accuracy active energy measurement IC, supports IEC 687/61036 Less than 0.1% error over a dynamic range of 500 to 1 Supplies active power on the frequency outputs F1 and F2 High frequency output CF is intended for calibration ...
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ADE7761 TABLE OF CONTENTS General Description ......................................................................... 3 Specifications..................................................................................... 4 Timing Characteristics..................................................................... 6 Absolute Maximum Ratings............................................................ 7 ESD Caution.................................................................................. 7 Terminology ...................................................................................... 8 Pin Configuration and Function Descriptions............................. 9 Typical Performance Characteristics ........................................... 11 Operation......................................................................................... 13 Power Supply Monitor ............................................................... ...
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GENERAL DESCRIPTION (continued from Page 1) The ADE7761 incorporates a missing neutral detection scheme by continuously monitoring the input voltage. When a missing neutral condition is detected—no voltage input—the ADE7761 continues billing based on the active current signal (see the ...
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ADE7761 SPECIFICATIONS ± 5%, AGND = DGND = 0 V, on-chip reference, on-chip oscillator Table 1. Parameter 1 ACCURACY 2 Measurement Error Phase Error between Channels (PF = 0.8 Capacitive) (PF = 0.5 Inductive) ...
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Parameter 5 LOGIC INPUTS SCF, S1, and S0 Input High Voltage, V INH Input Low Voltage, V INL Input Current Input Capacitance LOGIC OUTPUTS CF, REVP, and FAULT Output High Voltage Output Low ...
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ADE7761 TIMING CHARACTERISTICS ± 5%, AGND = DGND = 0 V, on-chip reference, on-chip oscillator Sample tested during initial release and after any redesign or process change that may affect this parameter. See Figure ...
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ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter V to AGND DD Analog Input Voltage to AGND MISCAL 1AP 1BP Reference Input ...
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ADE7761 TERMINOLOGY Measurement Error The error associated with the energy measurement made by the ADE7761 is defined by the following formula: = Percentage Error ⎛ − Energy registered by ADE 7761 True ⎜ ⎜ True Energy ⎝ Phase Error between ...
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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 V Power Supply. This pin provides the supply voltage for the digital circuitry in the ADE7761. The supply DD voltage should be maintained at 5 ...
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ADE7761 Pin No. Mnemonic Description 13 INT This pin is internally used and should be connected to DGND. 14 RCLKIN To enable the internal oscillator as a clock source on the chip, a precise low temperature drift resistor at nominal ...
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TYPICAL PERFORMANCE CHARACTERISTICS 1 ON-CHIP REFERENCE 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0.1 1.0 10.0 CURRENT (% of Full Scale) Figure 4. Active Power Error as a Percentage of Reading with Internal Reference ...
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ADE7761 40A TO 80mA 18Ω 1MΩ 220V 1kΩ 33nF 10µF 100nF 1kΩ 33nF ADE7761 1kΩ FAULT RB 33nF RCLKIN 1kΩ ...
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OPERATION POWER SUPPLY MONITOR The ADE7761 contains an on-chip power supply monitor. The power supply ( continuously monitored by the ADE7761 the supply is less than 4 V ± 5%, the ADE7761 goes into an inactive ...
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ADE7761 voltage, therefore The CT turns ratio and burden resistor (RB) are selected to give a peak differential voltage of ±660 mV. Figure 14 shows two typical connections for Channel V2. The first option uses a potential ...
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For any given input value in a single sampling interval, the data from the 1-bit ADC is virtually meaningless. Only when a large number of samples are ...
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ADE7761 The low frequency output of the ADE7761 is generated by accumulating this active power information. This low frequency inherently means a long accumulation time between output pulses. The output frequency is, therefore, proportional to the average active power. This ...
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Using Equations 1 and 2, the active power P can be expressed in terms of its fundamental active power (P power ( where: = × Φ cos( ) ...
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ADE7761 DIGITAL-TO-FREQUENCY CONVERSION As previously described, the digital output of the low-pass filter after multiplication contains the active power information. However, because this LPF is not an ideal “brick wall” filter implementation, the output signal also contains attenuated components at ...
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Table 5. F Frequency Selection 1– (Hz) 1– 13.7 1 Values are generated using the nominal frequency of 450 kHz are a binary ...
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ADE7761 Fault with Active Input Greater than Inactive Input the active current input (that is, being used for billing), 1A and the voltage signal on V (inactive input) falls below 93.75 the fault ...
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... F 2N measure active energy, but a quantity proportional to kAh. This C T quantity is used to generate pulses on the same CF, F1, and F2. This situation is indicated when the FAULT pin is high. Analog Devices Inc. cautions users of the ADE7761: • –V ). The 2P 2N • Missing Neutral Detection ...
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ADE7761 The ADE7761 leaves the missing neutral mode for normal operation when both conditions are no longer valid—voltage peak value greater than 9% of full scale and zero crossing on the voltage channel detected (see Figure 32 FILTER ...
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APPLICATIONS INTERFACING TO A MICROCONTROLLER FOR ENERGY MEASUREMENT The easiest way to interface the ADE7761 to a microcontroller is to use the CF high frequency output with the output frequency scaling set to 2048 × F1, F2. This is done ...
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ADE7761 Table 9. F1 and F2 Frequency with Half-Scale AC Inputs Frequency on F1 and F2 and Half-Scale AC Inputs (Hz) 1– 1.72 0.085 0 1 3.44 0. 6.86 ...
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... OUTLINE DIMENSIONS 0.05 MIN COPLANARITY ORDERING GUIDE Model Temperature Range ADE7761ARS –40°C to +85°C ADE7761ARSRL –40°C to +85°C ADE7761ARS-REF 7.50 7.20 6. 5.60 5.30 8.20 5.00 7.80 7. 1.85 1.75 2.00 MAX 1.65 0.25 0.09 0.65 0.38 BSC 0.22 SEATING PLANE ...
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... Figure 32, the ADE7761 does not measure active energy, but a quantity proportional to kAh. This quantity is used to generate pulses on the same CF, F1, and F2. This situation is indicated when the FAULT pin is high. Analog Devices Inc. cautions users of the ADE7761: • complies with the 2N • ...
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NOTES Rev Page ADE7761 ...
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ADE7761 NOTES © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04407–0–2/04(A) Rev Page ...