ADE7755ARSZRL Analog Devices Inc, ADE7755ARSZRL Datasheet
ADE7755ARSZRL
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ADE7755ARSZRL Summary of contents
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FEATURES High accuracy, surpasses 50 Hz/60 Hz IEC 687/IEC 1036 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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ADE7755 TABLE OF CONTENTS Features .............................................................................................. 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Timing Characteristics ................................................................ 4 Absolute Maximum Ratings ............................................................ 5 ESD Caution .................................................................................. 5 Pin Configuration and Function ...
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SPECIFICATIONS ± 5%, AGND = DGND = 0 V, on-chip reference, CLKIN = 3.58 MHz Table 1. Parameter 1, 2 ACCURACY 1 Measurement Error on Channel 1 Gain = 1 Gain ...
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ADE7755 Parameter POWER SUPPLY See the Terminology section. 2 See the Typical Performance Characteristics section for the plots. 3 Sample tested during initial release and after any redesign or process change ...
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ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter AV to AGND DGND Analog Input Voltage to AGND V1P, V1N, V2P, and V2N Reference Input Voltage to ...
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ADE7755 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1 DV Digital Power Supply. This pin provides the supply voltage for the digital circuitry in the ADE7755. The supply DD voltage should be maintained ...
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Pin No. Mnemonic Description 17 CLKIN An external clock can be provided at this logic input. Alternatively, a parallel resonant AT crystal can be connected across CLKIN and CLKOUT to provide a clock source for the ADE7755. The clock frequency ...
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ADE7755 TYPICAL PERFORMANCE CHARACTERISTICS 0.5 –40°C 0.4 0.3 0.2 0.1 +25°C 0 –0.1 +85°C –0.2 –0 GAIN = 1 –0.4 ON-CHIP REFERENCE –0.5 0.01 0.1 1 FULL-SCALE CURRENT (%) Figure 4. Error Reading ...
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PF = 0.5 GAIN = 8 0.6 ON-CHIP REFERENCE –40° 0.5 0.4 0.2 +25° +25° 0.5 –0.2 –0.4 +85° 0.5 –0.6 –0.8 0.01 0.1 1 FULL-SCALE CURRENT (%) Figure ...
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ADE7755 16 DISTRIBUTION CHARACTERISTICS NUMBER POINTS: 101 14 MINIMUM: –9.78871 GAIN = 1 MAXIMUM: 7.2939 TEMPERATURE = 25°C MEAN: –1.73203 12 STD. DEV: 3.61157 –15 –9 –3 3 CH1 OFFSET (mV) Figure 16. Channel ...
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TERMINOLOGY Measurement Error The error associated with the energy measurement made by the ADE7755 is defined by the following formula: = Percentage Error Energy Registered by the ADE 7755 True Energy Phase Error Between Channels The high-pass filter (HPF) in ...
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ADE7755 THEORY OF OPERATION The two ADCs of the ADE7755 digitize the voltage signals from the current and voltage transducers. These ADCs are 16-bit, second-order Σ-Δ with an oversampling rate of 900 kHz. This analog input structure greatly simplifies transducer ...
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NONSINUSOIDAL VOLTAGE AND CURRENT The active power calculation method also holds true for non- sinusoidal current and voltage waveforms. All voltage and current waveforms in practical applications have some harmonic content. Using the Fourier Transform operation, instantaneous voltage and current ...
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ADE7755 Channel 2 (Voltage Channel) The output of the line voltage transducer is connected to the ADE7755 at this analog input. Channel fully differential voltage input. The maximum peak differential signal on Channel 2 is ±660 mV. ...
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HPF and Offset Effects Figure 29 shows the effect of offsets on the active power calculation. An offset on Channel 1 and Channel 2 contributes a dc component after multiplication. Because the dc component is extracted by the LPF, it ...
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ADE7755 DIGITAL-TO- FREQUENCY V MULTIPLIER DIGITAL-TO- LPF FREQUENCY I LPF TO EXTRACT REAL POWER (DC TERM) V × cos(2ωt) ATTENUATED BY LPF ω 0 2ω FREQUENCY (RAD/s) INSTANTANEOUS ACTIVE POWER SIGNAL (FREQUENCY DOMAIN) Figure 32. Active Power-to-Frequency Conversion ...
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TRANSFER FUNCTION Frequency Outputs F1 and F2 The ADE7755 calculates the product of two voltage signals (on Channel 1 and Channel 2) and then low-pass filters this product to extract active power information. This active power information is then converted ...
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ADE7755 Table 8. Maximum Output Frequency on CF SCF ...
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NO LOAD THRESHOLD The ADE7755 also includes a no load threshold and start-up current feature that eliminates any creep effects in the meter. The ADE7755 is designed to issue a minimum output frequency in all modes except when SCF = ...
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ADE7755 OUTLINE DIMENSIONS 2.00 MAX 0.05 MIN COPLANARITY 0.10 ORDERING GUIDE Model Temperature Range 1 ADE7755ARSZ −40°C to +85°C 1 ADE7755ARSRLZ −40°C to +85°C EVAL-ADE7755EBZ 1 −40°C to +85° RoHS Compliant Part. ©2002–2009 Analog Devices, Inc. All ...