|
|
PDF ADE7903 Data sheet ( Hoja de datos )
| Número de pieza | ADE7903 | |
| Descripción | Sigma-Delta ADC | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ADE7903 (archivo pdf) en la parte inferior de esta página. Total 28 Páginas | ||
|
No Preview Available !
Data Sheet
3-Channel, Sigma-Delta ADC with SPI
ADE7903
FEATURES
One (ADE7903) 24-bit, Σ-Δ ADC (simultaneously sampling
with three ADE7912/ADE7913 ADCs)
On-chip temperature sensor
4-wire SPI serial interface
Standalone 24-bit, Σ-Δ ADC
Up to four ADE7903 and ADE7912/ADE7913 devices clocked
from a single crystal or an external clock
Synchronization of multiple ADE7903 and ADE7912/ADE7913
devices
±31.25 mV peak input range for current channel
±500 mV peak input range for voltage channels
Single 3.3 V supply
20-lead, wide body SOIC package
Operating temperature: −40°C to +85°C
APPLICATIONS
3-phase shunt-based polyphase meters with neutral channel
measurement
Single-phase meters
Power quality monitoring
Solar inverters
Process monitoring
Standalone ADCs
Protective devices
Isolated sensor interfaces
Industrial programmable logic controllers (PLCs)
GENERAL DESCRIPTION
The ADE7903 is a nonisolated, 3-channel, Σ-Δ analog-to-digital
converter (ADC) for the neutral line of polyphase energy
metering applications using shunt current sensors. The
ADE7903 can also be used for single-phase energy metering
and other standalone ADC applications. The ADE7903 features
three 24-bit ADCs. The current ADC provides a 67 dBFS
signal-to-noise ratio (SNR) over a 3.3 kHz signal bandwidth,
whereas the voltage ADCs provide an SNR of 72 dBFS over the
same bandwidth. One channel is dedicated to measuring the
voltage across a shunt when the shunt is used for current sensing.
Up to two additional channels are dedicated to measuring
voltages, which are usually sensed using resistor dividers.
One voltage channel can be used to measure the temperature
of the die via an internal sensor. The ADE7903 includes three
channels: one current channel and two voltage channels.
Together with the ADE7912/ADE7913, the ADE7903 provides
a small form factor, 3-phase isolated solution with a neutral
TYPICAL APPLICATION CIRCUIT
PHASE PHASE PHASE
NEUTRAL
A
B
C
ISOLATION
BARRIER
LOAD
V1P
VM
IM PHASE A
ADE7912/
IP ADE7913
V2P
3.3V
GNDISO_A
GNDMCU
V1P
VM
IM PHASE B
ADE7912/
IP ADE7913
V2P
3.3V
GNDISO_B
GNDMCU
V1P
VM
IM PHASE C
ADE7912/
IP ADE7913
V2P
3.3V
GNDISO_C
GNDMCU
V1P
VM
IM
NEUTRAL
LINE
ADE7903
IP
V2P
3.3V
GNDMCU
Figure 1.
3.3V
GNDMCU
measurement. The three phases are isolated with ADE7912/
ADE7913 devices, while the neutral line is not isolated with the
ADE7903.
The ADE7903 configuration and status registers are accessed
via a bidirectional SPI serial port for easy interfacing with
microcontrollers.
The ADE7903 can be clocked from a crystal or an external
clock signal. To minimize the system bill of materials, the
master ADE7912/ADE7913 can drive the clocks of up to three
additional ADE7912/ADE7913 or ADE7903 devices.
Multiple ADE7912/ADE7913 and ADE7903 devices can be
synchronized to sample at the same moment and provide
coherent outputs. The ADE7903 can also be used individually
as a standalone ADC.
The ADE7903 is available in a 20-lead, Pb-free, wide body SOIC
package.
Rev. 0
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
©2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
ADE7903
Parameter
VOLTAGE CHANNELS1
Signal-to-Noise Ratio, SNR
Min
Signal-to-Noise-and-Distortion Ratio, SINAD
Total Harmonic Distortion, THD
Spurious-Free Dynamic Range, SFDR
CLKIN2
Input Clock Frequency
CLKIN Duty Cycle
XTAL1 Logic Inputs
Input High Voltage, VINH
Input Low Voltage, VINL
XTAL1 Total Capacitance3
XTAL2 Total Capacitance3
CLKOUT Delay from XTAL14
LOGIC INPUTS—MOSI, SCLK, CS
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current, IIN
Input Capacitance, CIN
LOGIC OUTPUTS—CLKOUT/DREADY AND MISO
Output High Voltage, VOH
Output Low Voltage, VOL
POWER SUPPLY
VDD Pin
3.6
45
2.4
2.4
2.5
2.97
Supply Current (IDD) 5
Typ Max
72
74
77
79
72
74
77
78
−83
−83
−85
−85
86
86
87
87
4.096 4.21
50 55
0.8
40
40
100
0.015
0.8
1
10
0.4
3.63
5.1 6.2
2
Unit
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
MHz
%
V
V
pF
pF
ns
V
V
µA
pF
V
V
V
mA
mA
Test Conditions/Comments
ADC_FREQ = 8 kHz, BW = 3300 Hz
ADC_FREQ = 8 kHz, BW = 2000 Hz
ADC_FREQ = 2 kHz, BW = 825 Hz
ADC_FREQ = 2 kHz, BW = 500 Hz
ADC_FREQ = 8 kHz, BW = 3300 Hz
ADC_FREQ = 8 kHz, BW = 2000 Hz
ADC_FREQ = 2 kHz, BW = 825 Hz
ADC_FREQ = 2 kHz, BW = 500 Hz
ADC_FREQ = 8 kHz, BW = 3300 Hz
ADC_FREQ = 8 kHz, BW = 2000 Hz
ADC_FREQ = 2 kHz, BW = 825 Hz
ADC_FREQ = 2 kHz, BW = 500 Hz
ADC_FREQ = 8 kHz, BW = 3300 Hz
ADC_FREQ = 8 kHz, BW = 2000 Hz
ADC_FREQ = 2 kHz, BW = 825 Hz
ADC_FREQ = 2 kHz, BW = 500 Hz
All specifications for CLKIN = 4.096 MHz
ISOURCE = 800 µA
ISINK = 2 mA
For specified performance
Minimum = 3.3 V − 10%;
maximum = 3.3 V + 10%
No CLKIN signal at XTAL1 pin
1 See the Terminology section for a definition of the parameters.
2 CLKIN is the internal clock of the ADE7903. It is the frequency at which the device is clocked at the XTAL1 pin.
3 XTAL1/XTAL2 total capacitances refer to the net capacitances on each pin. Each capacitance is the sum of the parasitic capacitance at the pin and the capacitance of
the ceramic capacitor connected between the pin and GND. See the ADE7903 Clock section for more details.
4 CLKOUT delay from XTAL1 is the delay that occurs from a high to low transition at the XTAL1 pin to a synchronous high to low transition at the CLKOUT/DREADY pin
when CLKOUT functionality is enabled.
5 Supply current specified with the two VDD pins connected externally from the same power supply (see the Pin Configuration and Function Descriptions section).
Rev. 0 | Page 5 of 28
5 Page 
Data Sheet
ADE7903
TEST CIRCUIT
150Ω
FERRITE
TP4
1kΩ
150Ω
FERRITE
TP5
150Ω
FERRITE
TP3
150Ω
FERRITE
TP1
150Ω
FERRITE
TP2
330kΩ 330kΩ
33nF
330kΩ 330kΩ
10µF
1kΩ
100nF
1
2
7
33nF
33nF
330kΩ 1kΩ
TS4148
6
4
1kΩ 33nF
TS4148
TS4148
5
330kΩ
TS4148
TS4148
3
8
1kΩ 33nF 4.7µF 100nF 10
4.7µF 100nF 9
VDDISO
GNDISO
IP
XTAL1
XTAL2
VDD
GND
IM
V1P ADE7912A/ CS
ADE7913A MISO
VM MOSI
V2P
LDO
GNDISO
REF
SCLK
CLKOUT/DREADY
GND
13
14
19
20
18
15
16
17
12
11
3.3V
100nF
4.096MHz
10µF 22pF
TO MCU
3.3V
22pF
SAME AS IN
AADDEE77991123AA/
1
2
3
4
5
6
7
8
9
10
ADE7912B/
ADE7913B
12
18
15
16
17
19
13
14
11
20
TO MCU
10kΩ
TO MCU
TO MCU
SAME AS IN
AADDEE77991123AA/
TO MCU
SAME AS IN
AADDEE77991123AA/
1
2
3
4
5
6
7
8
9
10
ADE7912C/
ADE7913C
12
18
15
16
17
19
13
14
11
20
TO MCU
TO MCU
SAME AS IN
AADDEE77991123AA/
100nF
SAME AS IN
AADDEE77991123AA/
4.7µF 100nF
4.7µF 100nF
1 VDD
2 GND
7 IP
6 IM
4 V1P
5 VM
3 V2P
8 LDO
10 GND
9
REF
VDD 19
GND 20
GND 11
ADE7903N
CS 18
MISO 15
MOSI 16
SCLK 17
XTAL1 13
XTAL2 14
CLKOUT/DREADY 12
NOTES
1. ADE7912X/ADE7913X = PHASE X ADE7912/ADE7913, WHERE X = A, B, OR C.
Figure 18. Test Circuit
3.3V
100nF 10µF
TO MCU
Rev. 0 | Page 11 of 28
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet ADE7903.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ADE7903 | Sigma-Delta ADC | Analog Devices |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |