ADE7757ARN Analog Devices Inc, ADE7757ARN Datasheet
ADE7757ARN
Specifications of ADE7757ARN
Available stocks
Related parts for ADE7757ARN
ADE7757ARN Summary of contents
Page 1
FEATURES On-Chip Oscillator as Clock Source High Accuracy, Supposes 50 Hz/60 Hz IEC 521/IEC 61036 Less than 0.1% Error over a Dynamic Range of 500 to 1 The ADE7757 Supplies Average Real Power on the Frequency Outputs F1 and F2 ...
Page 2
ADE7757–SPECIFICATIONS Parameter 1, 2 ACCURACY 1 Measurement Error on Channel V1 1 Phase Error between Channels V1 Phase Lead 37 (PF = 0.8 Capacitive) V1 Phase Lag 60 (PF = 0.5 Inductive Power Supply Rejection Output Frequency Variation ...
Page 3
TIMING CHARACTERISTICS Parameter A, B Versions 3 t 244 1 t See Table 1 173 4 t See Table III NOTES 1 Sample tested during initial release ...
Page 4
... ORDERING GUIDE Model Package Description Package Options ADE7757ARN SOIC Narrow-Body ADE7757ARNRL SOIC Narrow-Body in Reel EVAL-ADE7757EB Evaluation Board ADE7757ARN-REF Reference Design TERMINOLOGY Measurement Error The error associated with the energy measurement made by the ADE7757 is defined by the following formula Energy Registered by ADE 7757 % Error ...
Page 5
Pin No. Mnemonic Description 1 V Power Supply. This pin provides the supply voltage for the circuitry in the ADE7757. The supply voltage DD should be maintained capacitor in parallel with a ceramic 100 nF capacitor. 2, ...
Page 6
ADE7757–Typical Performance Characteristics 220V 40A TO 40mA 350 0 ON-CHIP REFERENCE 0.4 0.3 0.2 +25 C 0.1 0 –0.1 –0.2 –0.3 –0.4 –0.5 0.01 0.1 1 CURRENT – A TPC 1. Error Reading ...
Page 7
PF = +0.5 0 –0.5 0.2 0 +1.0 –0.1 –0.2 –0.3 –0.4 –0 FREQUENCY – Hz TPC 5. Error Reading over Input Frequency 1 ...
Page 8
ADE7757 THEORY OF OPERATION The two ADCs digitize the voltage signals from the current and voltage sensors. These ADCs are 16-bit - with an oversampling rate of 450 kHz. This analog input structure greatly simplifies sensor interfacing by providing a ...
Page 9
Nonsinusoidal Voltage and Current The real power calculation method also holds true for nonsinusoidal current and voltage waveforms. All voltage and current waveforms in practical applications will have some har- monic content. Using the Fourier Transform, instantaneous voltage and current ...
Page 10
ADE7757 Typical Connection Diagrams Figure 7 shows a typical connection diagram for Channel V1. A shunt is the current sensor selected for this example because of its low cost compared to other current sensors such as the CT (current transformer). ...
Page 11
The HPF in Channel V1 has an associated phase response that is compensated for on-chip. Figures 11 and 12 show the phase error between channels with the compensation network acti- vated. The ADE7757 is phase compensated kHz ...
Page 12
ADE7757 Interfacing the ADE7757 to a Microcontroller for Energy Measurement The easiest way to interface the ADE7757 to a microcontroller is to use the CF high frequency output with the output frequency scaling set to 2048 F1, F2. This is ...
Page 13
Table I. F Frequency Selection 1– OSC Relation 0 0 OSC OSC OSC OSC/2 16 NOTES binary fraction of the internal oscillator frequency (OSC). ...
Page 14
ADE7757 Table V. F1 and F2 Frequency with Half-Scale AC Inputs Frequency on F1 and F2– (Hz)* CH1 and CH2 Half-Scale AC Input* 1– 0.86 0.051 F 0.044 1.72 0.051 F ...
Page 15
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN REV. A OUTLINE DIMENSIONS 16-Lead Standard Small Outline ...
Page 16
ADE7757 Revision History Location 10/03—Data Sheet changed from REV REV. A. Changes to FEATURES . . . . . . . . . . . . . . . . . . . . . . . . ...