EVAL-ADE7752EB Analog Devices Inc, EVAL-ADE7752EB Datasheet

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EVAL-ADE7752EB

Manufacturer Part Number
EVAL-ADE7752EB
Description
Manufacturer
Analog Devices Inc
Datasheet
1.EVAL-ADE7752EB.pdf (11 pages)

Specifications of EVAL-ADE7752EB

Lead Free Status / Rohs Status
Not Compliant
GENERAL DESCRIPTION
GENERAL DESCRIPTION
GENERAL DESCRIPTION
GENERAL DESCRIPTION
GENERAL DESCRIPTION
The ADE7752 is high accuracy electrical active power
measurement IC for three-phase applications with a pulse
output. This output is intended to be used for calibration
purposes. The ADE7752 incorporates ADCs, reference
circuitry, and all the signal processing required to perform
active power and energy measurement.
REV. PrB 06/02
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
Preliminary Technical Data
VBP
VAP
VCP
IBN
ICN
IAN
IAP
IBP
ICP
VN
VN
VN
Attenuation
Network
Network
Optional External
Filter
Filter
2.5V Reference
&
PRELIMINARY TECHNICAL DATA
AGND
AD780
FUNCTIONAL BLOCK DIAGRAM
ADE7752
V
DD
External
Clock in
BNC
PROTOTYPE
DGND
AREA
74HC08
The ADE7752 supplies average real power information on
the low frequency outputs F1 and F2. These logic outputs
may be used to directly drive an electromechanical counter.
The evaluation board provides screw connectors for easy
connection to an external counter. The NEGP logic output
goes high when negative active power is detected on any of the
three phases input. This causes an LED on the evaluation
board to switch on.
The ADE7752 evaluation board and this documentation,
together with the ADE7752 data sheet provides a complete
evaluation platform for the ADE7752.
The evaluation board has been designed so that the ADE7752
can be evaluated in the end application, i.e., Watt-Hour
Meter. Using the appropriate transducers on the current
channel (e.g., CT) the evaluation board can be connected to
a test bench or high voltage (240V rms) test circuit. On-board
resistor dividers networks provide the attenuation for the line
voltages. This application note also describes how the current
transducers should be connected for the best performance.
The evaluation board requires two external 5V power sup-
plies (one is required for isolation purposes) and the appro-
priate current transducers.
+5V
Evaluation Board Documentation
CF NEGP
ADE7752 Energy metering IC
Isolated Frequency
EVAL-ADE7752EB
V+
V-
output
CF
F1
F2
BNC
CF

EVAL-ADE7752EB Summary of contents

Page 1

... The evaluation board requires two external 5V power sup- plies (one is required for isolation purposes) and the appro- priate current transducers. FUNCTIONAL BLOCK DIAGRAM V AGND +5V DGND DD ADE7752 74HC08 CF NEGP BNC AD780 External Clock in PROTOTYPE AREA EVAL-ADE7752EB V+ V- BNC Isolated Frequency CF output ...

Page 2

... PRELIMINARY TECHNICAL DATA PRELIMINARY TECHNICAL DATA EVAL-ADE7752EB ANALOG INPUTS (P4, P5, P6, P7, P8 AND P11) ANALOG INPUTS (P4, P5, P6, P7, P8 AND P11) ANALOG INPUTS (P4, P5, P6, P7, P8 AND P11) ANALOG INPUTS (P4, P5, P6, P7, P8 AND P11) ANALOG INPUTS (P4, P5, P6, P7, P8 AND P11) Voltage and current signals are connected at the screw terminals P4-P6 and P7-P8 and P11 respectively ...

Page 3

... Right position: Pin22 is connected to a pull down resistor Left position: Pin21 is connected to a pull down resistor Right position: Pin 21 is connected to a pull up resistor Left position: Pin18 is connected to a pull down resistor Right position: Pin 18 is connected to a pull up resistor – 3 – EVAL-ADE7752EB ADE7752 JP27 TP13 JP32 R40 ...

Page 4

... PRELIMINARY TECHNICAL DATA EVAL-ADE7752EB JUMPER OPTION DESCRIPTION JP1-JP7-JP13 Closed This will short out R7, R13 and R19 respectively. The effect is to disable the phase compensation filter on the analog inputs IAN, IBN and ICN respectively. Default Closed. JP2-JP8-JP14 Closed This will connect the analog input IAP, IBP and ICP respectively to ground. Default Open ...

Page 5

... Figure 5. REV. PrB 06/02 EVAL-ADE7752EB At maximum current (40 A) the power seen by the meter will be 26.4 kW. This will produce a frequency of 0.733 Hz on the logic outputs F1 and F2 when these outputs are calibrated to 100 imp/kWhr (100 imp/ ...

Page 6

... PRELIMINARY TECHNICAL DATA EVAL-ADE7752EB Phase C Source Phase B Phase Load NEUTRAL Figure 5 - Typical set up for the ADE7752 evaluation board + 5.000 V - JP19 = CLOSED P1 JP21 = CLOSED IAP JP1 = CLOSED JP2 = OPEN SH1A JP3 = OPEN JP4 = CLOSED JP5 = OPEN SH2A IAN JP6 = OPEN IBP JP7 = CLOSED ...

Page 7

... Sq., 0.01 Ctrs, Compnt Corp., CSS-02-02U1 Supplied by Analog Devices Inc. Quad CMOS AND gates HP Optical Isolator 2.5V reference, Supplied by Analog Devices Inc. Quartz Crystal, HC-49(US) 15A, 2.5mm cable screw terminal sockets. WEILAND part no. 25.161.0253 15A, 2.5mm cable screw terminal sockets. WEILAND 25.161.0353 – 7 – EVAL-ADE7752EB ...

Page 8

... PRELIMINARY TECHNICAL DATA EVAL-ADE7752EB Evaluation board schematic (rev. A) – 8 – REV. PrB 06/02 ...

Page 9

... R69 XTAL2 C31 R43 C1 SH3A R23 SH3B 2 1 JP23 2 1 R12 R18 2 1 SH2B JP14 JP15 JP28 JP29 ICP ICN VN VCP – 9 – EVAL-ADE7752EB 3 R59 JP43A 2 1 R53 JP43B 2 1 R57 R44 R47 JP24 JP25 JP35 JP38 GND VBP VAP GND ...

Page 10

... PRELIMINARY TECHNICAL DATA EVAL-ADE7752EB PCB layout - Component Side –10– REV. PrB 06/02 ...

Page 11

... PRELIMINARY TECHNICAL DATA PRELIMINARY TECHNICAL DATA PCB layout - Solder Side REV. PrB 06/ –11– EVAL-ADE7752EB ...