ADE7754AR Analog Devices Inc, ADE7754AR Datasheet

no-image

ADE7754AR

Manufacturer Part Number
ADE7754AR
Description
IC ENERY METER 3PHASE 24-SOIC
Manufacturer
Analog Devices Inc
Datasheet

Specifications of ADE7754AR

Input Impedance
370 KOhm
Measurement Error
0.1%
Voltage - I/o High
2.4V
Voltage - I/o Low
0.8V
Current - Supply
7mA
Voltage - Supply
4.75 V ~ 5.25 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
24-SOIC (0.300", 7.50mm Width)
Meter Type
3 Phase
For Use With
EVAL-ADE7754EBZ - BOARD EVALAUTION FOR ADE7754
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
AD71049AR
AD71049AR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ADE7754ARZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
GENERAL DESCRIPTION
The ADE7754 is a high accuracy polyphase electrical energy
measurement IC with a serial interface and a pulse output. The
ADE7754 incorporates second order Σ-∆ ADCs, reference
circuitry, temperature sensor, and all the signal processing
required to perform active, apparent energy measurements, and
rms calculation.
The ADE7754 provides different solutions for measuring active
and apparent energy from the six analog inputs, thus enabling
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
FEATURES
High Accuracy, Supports IEC 687/61036
Compatible with 3-Phase/3-Wire, 3-Phase/4-Wire
Less than 0.1% Error in Active Power Measurement over a
Supplies Active Energy, Apparent Energy, Voltage RMS,
Digital Power, Phase, and Input Offset Calibration
On-Chip Temperature Sensor ( 4 C Typical after Calibration)
On-Chip User Programmable Thresholds for Line Voltage
SPI Compatible Serial Interface with Interrupt
Pulse Output with Programmable Frequency
Proprietary ADCs and DSP Provide High Accuracy over
Single 5 V Supply
and any Type of 3-Phase Services
Dynamic Range of 1000 to 1
Current RMS, and Sampled Waveform Data
SAG and Overdrive Detections
Request Line (IRQ)
Large Variations in Environmental Conditions and Time
V
V
V
I
I
I
I
I
I
V
AP
AN
AP
BP
BN
BP
CP
CN
CP
N
*Patents pending.
PGA1
PGA1
PGA1
2.4V REF
AGND
PGA2
PGA2
PGA2
4k
REF
ADC
ADC
ADC
ADC
ADC
ADC
IN/OUT
AAPGAIN
BAPGAIN
CAPGAIN
CVGAIN
AVGAIN
BVGAIN
BPHCAL
CPHCAL
APHCAL
HPF
HPF
HPF
X
X
X
2
2
2
FUNCTIONAL BLOCK DIAGRAM
X
X
X
2
2
2
AIRMSOS
BIRMSOS
CIRMSOS
LPF2
LPF2
LPF2
BVRMSOS
CVRMSOS
AVRMSOS
Energy Metering IC with Serial Port
AAPOS
BAPOS
CAPOS
the use of the ADE7754 in various power meter services such as
3-phase/4-wire, 3-phase/3-wire, and 4-wire delta.
In addition to rms calculation, active and apparent power infor-
mation, the ADE7754 provides system calibration features for
each phase (i.e., channel offset correction, phase calibration,
and gain calibration). The CF logic output provides instanta-
neous active power information.
The ADE7754 has a waveform sample register that enables
access to ADC outputs. The part also incorporates a detection
circuit for short duration low or high voltage variations. The
voltage threshold levels and the duration (number of half line
cycles) of the variation are user programmable.
A zero-crossing detection is synchronized with the zero-crossing
point of the line voltage of each of the three phases. The infor-
mation collected is used to measure each line’s period. It is also
used internally to the chip in the line active energy and line
apparent energy accumulation modes. This permits faster and
more accurate calibration of the power calculations. This signal
is also useful for synchronization of relay switching.
Data is read from the ADE7754 via the SPI serial interface. The
interrupt request output (IRQ) is an open-drain, active low
logic output. The IRQ output goes active low when one or more
interrupt events have occurred in the ADE7754. A status regis-
ter indicates the nature of the interrupt.
The ADE7754 is available in a 24-lead SOIC package.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
SENSOR
TEMP
AWG
BWG
CWG
AVAG
BVAG
CVAG
ABS
ABS
ABS
|X|
|X|
|X|
ADC
Polyphase Multifunction
RESET
© 2003 Analog Devices, Inc. All rights reserved.
DIN DOUT SCLK
%
ADE7754 REGISTERS AND
POWER SUPPLY
SERIAL INTERFACE
WDIV
MONITOR
AV
DD
%
DFC
CS
VADIV
ADE7754
ADE7754
IRQ
CFNUM
CFDEN
www.analog.com
CF
DV
DGND
CLKIN
CLKOUT
DD
*

Related parts for ADE7754AR

ADE7754AR Summary of contents

Page 1

FEATURES High Accuracy, Supports IEC 687/61036 Compatible with 3-Phase/3-Wire, 3-Phase/4-Wire and any Type of 3-Phase Services Less than 0.1% Error in Active Power Measurement over a Dynamic Range of 1000 to 1 Supplies Active Energy, Apparent Energy, Voltage RMS, Current ...

Page 2

ADE7754 Contents GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 1 FEATURES . . . . . . . . . ...

Page 3

ADE7754–SPECIFICATIONS Parameters ACCURACY Active Power Measurement Error Phase Error between Channels (PF = 0.8 Capacitive) (PF = 0.5 Inductive Power Supply Rejection Output Frequency Variation 1 DC Power Supply Rejection Output Frequency Variation Active Power Measurement Bandwidth V ...

Page 4

ADE7754 TIMING CHARACTERISTICS Parameter Spec Write Timing 400 100 8 Read Timing ...

Page 5

... Digital Output Voltage to DGND . . –0 Operating Temperature Range Industrial . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C Model ADE7754AR ADE7754ARRL EVAL-ADE7754EB *RW = Small Outline (Wide Body Package in Tubes) CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADE7754 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges ...

Page 6

ADE7754 Pin No. Mnemonic Description Digital Power Supply. The supply voltage should be maintained ± 5% for specified operation This pin should be decoupled to DGND with a 10 µF capacitor in parallel with ...

Page 7

WYE CONNECTION GAIN = 1 0. INTERNAL REFERENCE 0.30 PHASE B 0.20 0.10 0.00 PHASE A PHASE C –0.10 –0.20 –0.30 –0.40 –0.50 0.01 0.1 1 CURRENT (% fs) TPC 1. Real Power Error as a ...

Page 8

ADE7754 1.00 GAIN = 1 0.80 INTERNAL REFERENCE 0.60 0. 0.20 0.00 –0. 0.5 –0.40 –0.60 –0.80 –1. FREQUENCY (Hz) TPC 7. Real Power Error as a Percentage of Read- ing over ...

Page 9

TERMINOLOGY Measurement Error The error associated with the energy measurement made by the ADE7754 is defined by the formula = Percentage Error  − Energy Re gistered by ADE 7754   True Energy Phase Error Between Channels The HPF ...

Page 10

ADE7754 Figure 6 shows how the gain settings in PGA 1 (current channel) and PGA 2 (voltage channel) are selected by various bits in the gain register. The no-load threshold and sum of the absolute value can also be selected ...

Page 11

ALIASING EFFECTS IMAGE FREQUENCIES 0 2 417 FREQUENCY (kHz) Figure 9. ADC and Signal Processing in Current Channel or Voltage Channel CURRENT CHANNEL ADC Figure 10 shows the ADC and signal processing chain for the input IA of the current ...

Page 12

ADE7754 VOLTAGE CHANNEL ADC Figure 12 shows the ADC and signal processing chain for the input VA in voltage channel (which is the same for VB and VC GAIN[6: –100% TO +100 ...

Page 13

In addition to the enable bits, the zero-crossing detection interrupt of each phase is enabled/disabled by setting the ZXSEL bits of the MMODE register (Address 0Bh) to Logic respectively. Zero-Crossing Timeout Each zero-crossing detection has an associated ...

Page 14

ADE7754 VPEAK[7:0] PKV INTERRUPT FLAG (BIT C OF STATUS REGISTER) READ RSTATUS REGISTER Figure 17. Peak Detection Bits 2 and 3 of the measurement mode register define the phase supporting the peak ...

Page 15

The ADE7754 provides a means of digitally calibrating these small phase errors. The ADE7754 allows a small time delay or time advance to be introduced into the signal processing chain to compensate for ...

Page 16

ADE7754 pattern. Current rms measurements of Phase A are corrupted by the signal on the Phase C current input, current rms measure- ments of Phase B are corrupted by the signal on the Phase A current input, and current rms ...

Page 17

If the VGAIN registers are used for apparent power calibration (WATMOD bits in VAMODE register = 1 or 2), the voltage rms values are changed by voltage gain register value as described in the expression  = Voltage rms register ...

Page 18

ADE7754 I HPF CURRENT SIGNAL – i(t) –100% TO +100% FS 28F5C2h 00h 1V/GAIN1 D70A3Eh 1 V VOLTAGE SIGNAL – v(t) –100 100% FS 28F5h 00h 1V/GAIN2 D70Bh Figure 24 shows the signal processing in each phase for ...

Page 19

HPF PHASE A AAPGAIN HPF PHASE B BAPGAIN HPF PHASE C CAPGAIN V C Figure 26. Total Active Power Consumption Calculation For ...

Page 20

ADE7754 The discrete time sample period (T) for the accumulation register in the ADE7754 is 0.4 µs (4/10 MHz). In addition to calculating the energy, this integration removes any sinusoidal component that may be in the active power signal. Figure ...

Page 21

ACTIVE POWER PHASE ACTIVE POWER DFC PHASE ACTIVE POWER TOTAL ACTIVE POWER PHASE C Figure 29. ADE7754 Energy to Frequency Conversion A digital to frequency converter (DFC) is used to generate the CF pulsed ...

Page 22

ADE7754 by setting to Logic 1 Bit 3 of the gain register (Address 18h). See Table X. Any load generating an active power amplitude lower than the minimum amplitude specified will not be taken into account when accumulating the active ...

Page 23

Thus the IRQ line can also be used to signal the end of a cali- bration. Equation 14 is derived from Equations 8 and 12.       ∫ ×   ∫ ...

Page 24

ADE7754 –89 I MULTIPLIER HPF 24 1 INSTANTANEOUS REACTIVE V POWER SIGNAL – p(t) Figure 32. Reactive Power Signal Processing TOTAL REACTIVE POWER CALCULATION The sum of the reactive powers coming from each phase gives the total reactive power consumption. ...

Page 25

See the Current RMS Calculation and Voltage RMS Calculation sections. Only the effect of the apparent power gain is shown on Figure 35. The minimum output range is given when the apparent power gain register content ...

Page 26

ADE7754 APPARENT ENERGY CALCULATION The apparent energy is given as the integral of the apparent power. = ∫ Apparent Energy Apparent Power t dt The ADE7754 achieves the integration of the apparent power signal by continuously accumulating the apparent power ...

Page 27

MMODE REGISTER BIT 4 FROM VA ZERO-CROSS ADC DETECT LPF1 MMODE REGISTER BIT 5 FROM VB ZERO-CROSS ADC DETECT LPF1 MMODE REGISTER BIT 6 FROM VC ZERO-CROSS ADC DETECT LPF1 The number of half line cycles is specified in the ...

Page 28

ADE7754 SERIAL INTERFACE ADE7754 has a built-in SPI interface. The serial interface of the ADE7754 is made of four signals: SCLK, DIN, DOUT, and CS. The serial clock for a data transfer is applied at the SCLK logic input, which ...

Page 29

SCLK DIN COMMAND BYTE SCLK X X DIN MOST SIGNIFICANT BYTE Serial Read Operation During a data read operation from the ADE7754, data is shifted out at the ...

Page 30

ADE7754 INTERRUPTS ADE7754 interrupts are managed through the interrupt status register (STATUS[15:0], Address 10h) and the interrupt enable register (IRQEN[15:0], Address 0Fh). When an interrupt event occurs in the ADE7754, the corresponding flag in the interrupt status register is set ...

Page 31

ACCESSING THE ADE7754 ON-CHIP REGISTERS All ADE7754 functionality is accessed via the on-chip registers. Each register is accessed by first writing to the communications register, then transferring the register data. For a full description of the serial interface protocol, see ...

Page 32

ADE7754 Address [A5:A0] Name R/W* Length 00h Reserved 01h AENERGY R 24 02h RAENERGY R 24 03h LAENERGY R 24 04h VAENERGY R 24 05h RVAENERGY R 24 06h LVAENERGY R 24 07h PERIOD R 15 08h TEMP R 8 ...

Page 33

Address [A5:A0] Name R/W* Length 13h LINCYC R/W 16 14h SAGCYC R/W 8 15h SAGLVL R/W 8 16h VPEAK R/W 8 17h IPEAK R/W 8 18h GAIN R/W 8 19h AWG R/W 12 1Ah BWG R/W 12 1Bh CWG R/W ...

Page 34

ADE7754 Address [A5:A0] Name R/W* Length 31h CIrmsOS R/W 12 32h AVrmsOS R/W 12 33h BVrmsOS R/W 12 34h CVrmsOS R/W 12 35h AAPGAIN R/W 12 36h BAPGAIN R/W 12 37h CAPGAIN R/W 12 38h AVGAIN R/W 12 39h BVGAIN ...

Page 35

Operational Mode Register (0Ah) The general configuration of the ADE7754 is defined by writing to the OPMODE register. Table IX summarizes the functionality of each bit in the OPMODE register. Bit Bit Default Location Mnemonic Value Description 0 DISHPF 0 ...

Page 36

ADE7754 Gain Register (18h) The gain of the analog inputs and the mode of accumulation of the active energies in the ADE7754 are defined by writing to the gain register. Table X summarizes the functionality of each bit in the ...

Page 37

Measurement Mode Register (0Bh) The configuration of the period and peak measurements made by the ADE7754 are defined by writing to the MMODE register. Table XII summarizes the functionality of each bit in the MMODE register. Bit Bit Default Location ...

Page 38

ADE7754 Watt Mode Register (0Dh) The phases involved in the active energy measurement of the ADE7754 are defined by writing to the WATMODE register. Table XIV summarizes the functionality of each bit in the WATMODE register. Bit Bit Default Location ...

Page 39

Interrupt Enable Register (0Fh) When an interrupt event occurs in the ADE7754, the IRQ logic output goes active low if the enable bit for this event is Logic 1 in this register. The IRQ logic output is reset to its ...

Page 40

ADE7754 Interrupt Status Register (10h)/Reset Interrupt Status Register (11h) The interrupt status register is used to determine the source of an interrupt event. When an interrupt event occurs in the ADE7754, the corresponding flag in the interrupt status register is ...

Page 41

COPLANARITY 0.10 REV. 0 OUTLINE DIMENSIONS 24-Lead Standard Small Outline Package [SOIC] Wide Body (RW-24) Dimensions shown in millimeters and (inches) 15.60 (0.6142) 15.20 (0.5984 7.60 (0.2992) 7.40 (0.2913) 10.65 (0.4193 10.00 ...

Page 42

–42– ...

Page 43

–43– ...

Page 44

–44– ...

Related keywords