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Datasheet ADE7752A PDF ( 特性, スペック, ピン接続図 )

部品番号 ADE7752A
部品説明 Polyphase Energy Metering IC
メーカ Analog Devices
ロゴ Analog Devices ロゴ 
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ADE7752A Datasheet, ADE7752A PDF,ピン配置, 機能
Polyphase Energy Metering IC
with Pulse Output
ADE7752/ADE7752A
FEATURES
High accuracy, supports 50 Hz/60 Hz IEC62053-2x
Less than 0.1% error over a dynamic range of 500 to 1
Compatible with 3-phase/3-wire delta and 3-phase/4-wire
Wye configurations
The ADE7752 supplies average real power on frequency
outputs F1 and F2
High frequency output CF is intended for calibration and
supplies instantaneous real power
Logic output REVP indicates a potential miswiring or
negative power for each phase
Direct drive for electromechanical counters and 2-phase
stepper motors (F1 and F2)
Proprietary ADCs and DSP provide high accuracy over large
variations in environmental conditions and time
On-chip power supply monitoring
On-chip creep protection (no load threshold)
On-chip reference 2.4 V ±8% (20 ppm/°C typical) with
external overdrive capability
Single 5 V supply, low power
60 mW typical: ADE7752
30 mW typical: ADE7752A
Low cost CMOS process
GENERAL DESCRIPTION
The ADE7752 is a high accuracy polyphase electrical energy
measurement IC. The ADE7752A is a pin-to-pin compatible
low power version of ADE7752. The functions of ADE7752 and
ADE7752A are the same. Both products are referred to in the
text of this data sheet as ADE7752.
The part specifications surpass the accuracy requirements as
quoted in the IEC62053-2x standard. The only analog circuitry
used in the ADE7752 is in the analog-to-digital converters (ADCs)
and reference circuit. All other signal processing (such as multi-
plication, filtering, and summation) is carried out in the digital
domain. This approach provides superior stability and accuracy
over extremes in environmental conditions and over time.
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 or to
interface with an MCU. The CF logic output gives instanta-
neous real power information. This output is intended to be
used for calibration purposes.
The ADE7752 includes a power supply monitoring circuit on
the VDD pin. The ADE7752 remains inactive until the supply
voltage on VDD reaches 4 V. If the supply falls below 4 V, no
pulses are issued on F1, F2, and CF. Internal phase matching
circuitry ensures that the voltage and current channels are
phase matched. An internal no load threshold ensures the part
does not exhibit any creep when there is no load. The ADE7752
is available in a 24-lead SOIC package.
FUNCTIONAL BLOCK DIAGRAM
IAP 5
IAN 6
VAP 16
IBP 7
IBN 8
VBP 15
ICP 9
ICN 10
VCP 14
VN 13
ADC
ADC
ADC
ADC
ADC
ADC
2.4V REF
11
AGND
4kΩ
12
REFIN/OUT
HPF
Φ
PHASE
CORRECTION
HPF
Φ
PHASE
CORRECTION
HPF
Φ
PHASE
CORRECTION
ABS
17
VDD
3
X
LPF
POWER
SUPPLY
MONITOR
ADE7752/
ADE7752A
XΣ
LPF
2 DGND
19 CLKIN
20 CLKOUT
X
LPF
DIGITAL-TO-FREQUENCY CONVERTER
4 18 21 22 23 24 1
REVP SCF S0 S1 F2 F1 CF
Figure 1. 24-Lead Standard Small Outline Package [SOIC]
Rev. C
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. Specifications subject to change without notice.
No license is granted by implication or otherwise under any patent or patent rights of Analog
Devices.Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
© 2005 Analog Devices, Inc. All rights reserved.

1 Page



ADE7752A pdf, ピン配列
ADE7752/ADE7752A
SPECIFICATIONS
VDD = 5 V ± 5%, AGND = DGND = 0 V, on-chip reference, CLKIN = 10 MHz, TMIN to TMAX = –40°C to +85°C, unless otherwise noted.
Table 1.
Parameter
ACCURACY1, 2
Measurement Error on Current
Channel
ADE7752
ADE7752A
Min Typ Max Min Typ Max Unit
0.1 0.1 % Reading
Phase Error Between Channels
PF = 0.8 Capacitive
PF = 0.5 Inductive
AC Power Supply Rejection
Output Frequency Variation
(CF)
±0.1
±0.1
0.01
±0.1 Degrees
±0.1 Degrees
0.01 % Reading
DC Power Supply Rejection
Output Frequency Variation
(CF)
0.1
0.1 % Reading
ANALOG INPUTS
Maximum Signal Levels
Input Impedance (DC)
Bandwidth (–3 dB)
ADC Offset Error1, 2
Gain Error
±0.5 ±0.5 Vpeak
differential
370 410
370 450
14 14 kHz
±25 ±25 mV
±9 ±9 % Ideal
REFERENCE INPUT
REFIN/OUT Input Voltage Range
Input Impedance
Input Capacitance
ON-CHIP REFERENCE
Reference Error
Temperature Coefficient
CLKIN
Input Clock Frequency
LOGIC INPUTS3
ACF, S0, S1, and ABS
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current, IIN
Input Capacitance, CIN
LOGIC OUTPUTS3
F1 and F2
Output High Voltage, VOH
Output Low Voltage, VOL
CF and REVP
Output High Voltage, VOH
Output Low Voltage, VOL
POWER SUPPLY
VDD
IDD
2.6 2.6 V
2.2 2.2 V
3.3 3.3 kΩ
10 10 pF
±200
25
±200 mV
25 ppm/°C
10 10 MHz
2.4 2.4 V
0.8 0.8 V
±3 ±3 μA
10 10 pF
4.5 4.5
0.5
44
0.5
4.75 5.25 4.75
12 16
6
V
0.5 V
V
0.5 V
5.25 V
9 mA
Conditions
Voltage channel with full-scale signal
(±500 mV), 25°C, over a dynamic range
of 500 to 1
SCF = 0; S0 = S1 = 1
IA = IB = IC = 100 mV rms,
VA = VB = VC = 100 mV rms, @ 50 Hz,
ripple on VDD of 175 mV rms @ 100 Hz
S1 = 1; S0 = SCF = 0
IA = IB = IC = 100 mV rms,
VA = VB = VC = 100 mV rms,
VDD = 5 V ±250 mV
See the Analog Inputs section.
VAP to VN, VBP to VN, VCP to VN, IAP to IAN,
IBP to IBN, ICP to ICN
CLKIN = 10 MHz
CLKIN/256, CLKIN = 10 MHz
External 2.5 V reference,
IA = IB = IC = 500 mV dc
2.4 V + 8%
2.4 V – 8%
Nominal 2.4 V
All specifications for CLKIN of 10 MHz
VDD = 5 V ±5%
VDD = 5 V ±5%
Typically 10 nA, VIN = 0 V to VDD
ISOURCE = 10 mA, VDD = 5 V
ISINK = 10 mA, VDD = 5 V
VDD = 5 V, ISOURCE = 5 mA
VDD = 5 V, ISINK = 5 mA
For specified performance
5 V ±5%
1 See the Terminology section for explanation of specifications.
2 See the plots in the Typical Performance Characteristics section.
3 Sample tested during initial release and after any redesign or process change that may affect this parameter.
Rev. C | Page 3 of 24


3Pages


ADE7752A 電子部品, 半導体
ADE7752/ADE7752A
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
CF 1
24 F1
DGND 2
23 F2
VDD 3
22 S1
REVP
IAP
IAN
IBP
4 21
5 ADE7752/ 20
ADE7752A
6 TOP VIEW 19
7 (Not to Scale) 18
S0
CLKOUT
CLKIN
SCF
IBN 8
17 ABS
ICP 9
16 VAP
ICN 10
15 VBP
AGND 11
14 VCP
REFIN/OUT 12
13 VN
Figure 3. Pin Configuration
Table 4. Pin Function Descriptions
Pin No. Mnemonic
Description
1 CF
Calibration Frequency Logic Output. The CF logic output gives instantaneous real power information.
This output is intended to be used for calibration purposes. See the SCF pin description.
2 DGND
This provides the ground reference for the digital circuitry in the ADE7752: the multiplier, filters, and
digital-to-frequency converter. Because the digital return currents in the ADE7752 are small, it is
acceptable to connect this pin to the analog ground plane of the whole system.
3 VDD
Power Supply. This pin provides the supply voltage for the digital circuitry in the ADE7752. The supply
voltage should be maintained at 5 V ± 5% for specified operation. This pin should be decoupled to
DGND with a 10 μF capacitor in parallel with a 100 nF ceramic capacitor.
4 REVP
This logic output goes logic high when negative power is detected on any of the three phase inputs,
that is, when the phase angle between the voltage and the current signals is greater than 90°. This
output is not latched and is reset when positive power is once again detected. See the Negative Power
Information section.
5, 6; IAP, IAN;
7, 8; IBP, IBN;
9, 10 ICP, ICN
Analog Inputs for Current Channel. This channel is intended for use with the current transducer and is
referenced in this document as the current channel. These inputs are fully differential voltage inputs
with maximum differential input signal levels of ±0.5 V. See the Analog Inputs section. Both inputs have
internal ESD protection circuitry. In addition, an overvoltage of ±6 V can be sustained on these inputs
without risk of permanent damage.
11 AGND
This pin provides the ground reference for the analog circuitry in the ADE7752: the ADCs, temperature
sensor, and reference. This pin should be tied to the analog ground plane or the quietest ground
reference in the system. This quiet ground reference should be used for all analog circuitry, such as
antialiasing filters, current and voltage transducers, and so on. To keep ground noise around the
ADE7752 to a minimum, the quiet ground plane should connect to the digital ground plane at only
one point. It is acceptable to place the entire device on the analog ground plane.
12 REFIN/OUT This pin provides access to the on-chip voltage reference. The on-chip reference has a nominal value of
2.4 V ± 8% and a typical temperature coefficient of 20 ppm/°C. An external reference source may also be
connected at this pin. In either case, this pin should be decoupled to AGND with a 1 μF ceramic capacitor.
13–16
VN, VCP, VBP,
VAP
Analog Inputs for the Voltage Channel. This channel is intended for use with the voltage transducer and
is referenced in this document as the voltage channel. These inputs are single-ended voltage inputs with
a maximum signal level of ±0.5 V with respect to VN for specified operation. All inputs have internal ESD
protection circuitry. In addition, an overvoltage of ± 6 V can be sustained on these inputs without risk of
permanent damage.
17 ABS
This logic input is used to select the way the three active energies from the three phases are summed.
This offers the designer the capability to do the arithmetical sum of the three energies (ABS logic high)
or the sum of the absolute values (ABS logic low). See the Mode Selection of the Sum of the Three Active
Energies section.
18 SCF
Select Calibration Frequency. This logic input is used to select the frequency on the calibration output
CF. Table 7 shows how the calibration frequencies are selected.
Rev. C | Page 6 of 24

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