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PDF ADE7816 Data sheet ( Hoja de datos )
| Número de pieza | ADE7816 | |
| Descripción | Energy Metering IC | |
| Fabricantes | Analog Devices | |
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Data Sheet
Six Current Channels, One Voltage Channel
Energy Metering IC
ADE7816
FEATURES
Measures active and reactive energy, sampled waveforms,
and current and voltage rms
6 current input channels and 1 voltage channel
<0.1% error in active and reactive energy over a dynamic
range of 1000:1
Supports current transformer and Rogowski coil sensors
Provides instantaneous current and voltage readings
Angle measurements on all 6 channels
2 kHz bandwidth operation
Reference: 1.2 V (drift 10 ppm/°C typical) with external
overdrive capability
Flexible I2C, SPI, and HSDC serial interfaces
GENERAL DESCRIPTION
The ADE7816 is a highly accurate, multichannel metering
device that is capable of measuring one voltage channel and up
to six current channels. It measures line voltage and current and
calculates active and reactive energy, as well as instantaneous rms
voltage and current. The device incorporates seven sigma-delta
(Σ-Δ) ADCs with a high accuracy energy measurement core.
The six current input channels allow multiple loads to be measured
simultaneously. The voltage channel and the six current channels
each have a complete signal path allowing for a full range of
measurements. Each input channel supports a flexible gain stage
and is suitable for use with current transformers (CTs). Six on-
chip digital integrators facilitate the use of the Rogowski coil
sensors.
The ADE7816 provides access to on-chip meter registers via either
the SPI or I2C interface. A dedicated high speed interface, the
high speed data capture (HSDC) port, can be used in conjunction
with I2C to provide access to real-time ADC output information.
A full range of power quality information, such as overcurrent,
overvoltage, peak, and sag detection, is accessible via the two
external interrupt pins, IRQ0 and IRQ1.
The ADE7816 energy metering IC operates from a 3.3 V supply
voltage and is available in a 40-lead LFCSP that is Pb free and
RoHS compliant.
CLKIN 27
CLKOUT 28
VP 15
VN 16
IAP 7
IAN 8
IBP 9
IBN 12
ICP 13
ICN 14
IDP 23
RESET
4
1.2V
REF
PGA2
PGA1
PGA1
PGA1
PGA3
REFIN/OUT
17
FUNCTIONAL BLOCK DIAGRAM
DGND
6
VGAIN
ADC
IAGAIN
PCF_A_COEFF
HPF
DIGITAL
INTEGRATOR
ADC
HPF
ADC
ADC
ADC
ENERGY AND RMS CALCULATIONS SEE
CHANNEL A FOR DETAILED SIGNAL PATH
ENERGY AND RMS CALCULATIONS SEE
CHANNEL A FOR DETAILED SIGNAL PATH
ENERGY AND RMS CALCULATIONS SEE
CHANNEL A FOR DETAILED SIGNAL PATH
VRMSOS
X2
LPF
VRMS
AWATTOS AWGAIN
LPF
COMPUTATIONAL
BLOCK FOR
TOTAL
REACTIVE POWER
AVAROS
AVARGAIN
ENERGY
AND RMS
DATA
ALL
CHANNELS
IARMSOS
X2
LPF
IARMS
IEP 22
PGA3
ADC
ENERGY AND RMS CALCULATIONS SEE
CHANNEL A FOR DETAILED SIGNAL PATH
IFP 19
IN 18
PGA3
ADC
ENERGY AND RMS CALCULATIONS SEE
CHANNEL A FOR DETAILED SIGNAL PATH
POR
LDO
LDO
ADE7816
SPI/I2C
I2C
HSDC
26 25
VDD AGND
Figure 1.
24
AVDD
5
DVDD
40 34 33 31
NC NC NC NC
2 PULL_HIGH
3 PULL_LOW
29 IRQ0
32 IRQ1
36 SCLK/SCL
38 MOSI/SDA
37 MISO/HSD
39 SS/HSA
35 HSCLK
1 NC
10 NC
11 NC
20 NC
21 NC
30 NC
Rev. A
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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 ©2012–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
ADE7816
Data Sheet
Parameter 1, 2
Min Typ Max
WAVEFORM SAMPLING
Current and Voltage Channels
Signal-to-Noise Ratio, SNR
70
Signal-to-Noise-and-Distortion Ratio, SINAD
60
Bandwidth (−3 dB)
2
TIME INTERVAL BETWEEN CHANNELS
Measurement Error
0.3
REFERENCE INPUT
REFIN/OUT Input Voltage Range
1.1 1.3
Input Capacitance
10
ON-CHIP REFERENCE
Reference Error
±2
Output Impedance
1.2
Temperature Coefficient
10 50
CLKIN, CLKOUT
Input Clock Frequency
Crystal Equivalent Series Resistance
CLKIN Input Capacitance
CLKOUT Output Capacitance
LOGIC INPUTS—MOSI/SDA, SCLK/SCL,
SS/HSA, RESET, PULL_HIGH, PULL_LOW
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current, IIN
16.22
30
2.0
Input Capacitance, CIN
LOGIC OUTPUTS—IRQ0, IRQ1, MISO/HSD
Output High Voltage, VOH
ISOURCE
Output Low Voltage, VOL
ISINK
POWER SUPPLY
VDD Pin
IDD
2.4
3.0
1 See the Typical Performance Characteristics section.
2 See the Terminology section for a definition of the parameters.
16.384
20
20
16.55
200
0.8
−8.7
3
100
10
800
0.4
2
3.6
25 27.8
Unit Test Conditions/Comments
Sampling CLKIN/2048, 16.384 MHz/2048 = 8 kSPS
See the Instantaneous Waveforms section
dB PGA = 1
dB PGA = 1
kHz
Degrees Line frequency = 45 Hz to 65 Hz, HPF on
V
pF
mV
kΩ
ppm/°C
MHz
Ω
pF
pF
Minimum = 1.2 V − 8%; maximum = 1.2 V + 8%
Nominal 1.207 V at the REFIN/OUT pin at TA = 25°C
Maximum value across full temperature range
of −40°C to +85°C
All specifications are for CLKIN, CLKOUT of
16.384 MHz
V VDD = 3.3 V ± 10%
V VDD = 3.3 V ± 10%
µA Input = 0 V, VDD = 3.3 V
μA Input = VDD = 3.3 V
nA Input = VDD = 3.3 V
pF
VDD = 3.3 V ± 10%
V VDD = 3.3 V ± 10%
µA
V VDD = 3.3 V ± 10%
mA
For specified performance
V Minimum = 3.3 V − 10%; maximum = 3.3 V + 10%
mA
Rev. A | Page 4 of 48
5 Page 
ADE7816
Data Sheet
Pin No.
24
25
26
27
28
29, 32
35
36
37
38
39
EP
Mnemonic
AVDD
AGND
VDD
CLKIN
CLKOUT
IRQ0, IRQ1
HSCLK
SCLK/SCL
MISO/HSD
MOSI/SDA
SS/HSA
Exposed
Pad
Description
this data sheet as Current Channel D. Connect this input in a single-ended configuration with a maximum
signal level of ±0.5 V with respect to IN.
On-Chip 2.5 V Analog Low Dropout (LDO) Regulator Access. Do not connect external active circuitry to this
pin. Decouple this pin with a 4.7 µF capacitor in parallel with a ceramic 220 nF capacitor.
Ground Reference. This pin provides the ground reference for the analog circuitry. Tie this pin to the analog
ground plane or to the quietest ground reference in the system. Use this quiet ground reference for all
analog circuitry, such as antialiasing filters and current and voltage transducers.
Supply Voltage. This pin provides the supply voltage and should be set at 3.3 V ± 10% for specified operation.
Decouple this pin to AGND with a 10 µF capacitor in parallel with a ceramic 100 nF capacitor.
Master Clock. An external clock can be provided at this logic input. Alternatively, a parallel resonant AT-cut
crystal can be connected across CLKIN and CLKOUT to provide a clock source for the ADE7816. The clock
frequency for specified operation is 16.384 MHz. Use ceramic load capacitors of a few tens of picofarads (pF)
with the gate oscillator circuit. Refer to the crystal manufacturer data sheet for load capacitance requirements.
A crystal can be connected across this pin and CLKIN (as stated in the description for Pin 27) to provide
a clock source for the ADE7816. The CLKOUT pin can drive one CMOS load when either an external clock
is supplied at CLKIN or a crystal is being used.
Interrupt Request Outputs. These are active low logic outputs. See the Interrupts section for a detailed
presentation of the events that can trigger interrupts.
Serial Clock Output for the HSDC Port.
Serial Clock Input for the SPI Port/Serial Clock Input for the I2C Port. All serial data transfers are synchronized to
this clock (see the Communication section). This pin has a Schmidt trigger input for use with a clock source
that has a slow edge transition time (for example, opto-isolator outputs).
Data Output for SPI Port/Data Output for HSDC Port.
Data Input for SPI Port/Data Output for I2C Port.
Slave Select for SPI Port/HSDC Port Active.
Exposed Pad. Create a similar pad on the PCB under the exposed pad. Solder the exposed pad to the pad on
the PCB to confer mechanical strength to the package. Connect the pads to AGND and DGND.
Rev. A | Page 10 of 48
11 Page | ||
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| PDF Descargar | [ Datasheet ADE7816.PDF ] | |
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