SA2005FSA [SAMES]
Three Phase Bidirectional Power/Energy Metering IC with Instantaneous Pulse Output; 三相双向功率/电能计量IC,具有瞬时脉冲输出型号: | SA2005FSA |
厂家: | SAMES |
描述: | Three Phase Bidirectional Power/Energy Metering IC with Instantaneous Pulse Output |
文件: | 总10页 (文件大小:109K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Three Phase Bidirectional Power/Energy
Metering IC with Instantaneous Pulse Output
SA2005F
ssames
FEATURES
n
n
n
n
n
n
Operates over a wide temperature range
n
n
n
Functionally compatible with the SA9105F with reduced
external components
Performs bidirectional one, two or three phase power and
energymeasurement
Meets the IEC 521/1036 Specification requirements for
Class1ACWatthourmeters
Uses current transformers for current sensing
Easily adaptable to different signal levels
Precision voltage reference on chip
Precision oscillator on chip.
Protected against ESD
DESCRIPTION
The SAMES SA2005F is an enhancement of the SA9105F. A
precision oscillator and the loop capacitors are integrated on
chip.
Energy consumption is determined by integrating the power
measurement over time.
This innovate universal three phase power/energy metering
integrated circuit is ideally suited for applications such as
residential and industrial energy metering and control.
The SAMES SA2005F three phase bidirectional power/energy
metering integrated circuit generates pulse rate outputs for
positive and negative energy directions. The frequency of the
pulses is proportional to the measured power consumption.
The SA2005F performs active power calculation.
The SA2005F integrated circuit is available in 20 pin dual-in-
line plastic (DIP-20), and 20 pin small outline (SOIC-20)
package types.
The method of calculation takes the power factor into account.
VDD VSS
PGM0
PGM1
IIN1
IIP1
I1
X
X
X
IVN1
V1
POWER
INTEGRATE
AND
IIN2
IIP2
FOUT
I2
TO
PULSE
RATE
IVN2
V2
DIR
AVERAGE
IIN3
IIP3
I3
IVN3
V3
GND
REF
TIMING & CONTROL
OSC
Dr-01570
VREF
TCLK
TEST
Figure 1: Block Diagram
1/10
SPEC-0042 (REV. 1)
03-07-00
SA2005F
ssaammeess
ELECTRICAL CHARACTERISTICS
#
(V = 2.5V, V = -2.5V, over the temperature range -10°C to +70°C , unless otherwise specified.)
SS
DD
Symbol
Typ
Parameter
Min
-25
4.5
Max
+85
5.5
Unit
Condition
Operating temp. Range
T
O
°C
V
Supply Voltage
V
DD
- V
SS
I
DD
mA
Output unloaded
10
Supply Current
1% - 100% of rated
power
Nonlinearity of Power
Calculation
-0.3
-25
-25
+0.3
%
µA
µA
Current Sensor Inputs (Diffferential)
Input Current Range
I
+25
Peak value
II
Voltage Sensor Input (Asymmetrical)
I
IV
+25
Peak value
Input Current Range
Pins FOUT, DIR
V
V
OL
V
V
I
= 5mA
V -1
DD
V +1
SS
Output Low Voltage
Output High Voltage
OL
OH
I
OH
= -2mA
MODES 0, 1, 2
Pulse Rate: FOUT
Hz
Hz
0
0
f
P
64
Specified linearity
Min and Max limits
200
MODE 3
f
P
0
0
1160
3500
Hz
Hz
Specified linearity
Min and Max Limits
Pin PGM0, PGM1, TEST, TCLK
High Voltage
V
V
V -1
DD
V
V
IH
Low Voltage
V +1
SS
IL
With R = 24kW
Pin VREF
50
connected to V
-I
45
Ref. Current
Ref. Voltage
55
µA
V
SS
R
1.1
1.3
Referred to V
V
SS
R
ABSOLUTE MAXIMUM RATINGS*
Parameter
Symbol
Min
-0.3
-150
-40
Max
Unit
V
mA
°C
Supply Voltage
V -V
DD
6.0
SS
Current on any pin
Storage Temperature
Operating Temperature
I
PIN
+150
+125
+85
T
STG
T
O
-40
°C
*Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress
rating only. Functional operation of the device at these or any other condition above those indicated in the operational sections of
this specification, is not implied. Exposure to Absolute Maximum Ratings for extended periods may affect device reliability.
2/10
3
http://www.sames.co.za
SA2005F
ssaammeess
PIN DESCRIPTION
Designation
Description
PIN
Analog Ground. The voltage to this pin should be mid-way between V and V .
SS
16
GND
DD
V
DD
Positive Supply voltage.
6
V
SS
14
Negative Supply voltage.
The current into the A/D converter should be set at 14µA at nominal mains
RMS
17, 20, 3
IVN1, IVN2, IVN3
voltage. The voltage sense input saturates at an input current of ±25µA peak.
Inputs from current sensors. The shunt resistor voltage from each channel is
19, 18, 2, 1,
5, 4
IIN1, IIP1, IIN2, IIP2,
converted to a current of 16µA at rated conditions. The current sense input
RMS
IIN3, IIP3
saturates at an input current of ±25µA peak.
This pin provides the connection for the reference current setting resistor.
15
7, 10
8
VREF
TCLK, TEST
FOUT
A 24kW resistor connected to V sets the optimum operating condition.
SS
Test inputs. For normal operation these pins must be connected to V .
SS
Pulse rate output. The pulse frequency is proportional to the sum of the power
measured on all three phases. The pulse format also indicates the direction of
energy flow.
9
DIR
Direction output. This output indicates the direction of energy flow.
FOUT Pulse format Select. These inputs define the FOUT pulse width
and format.
12, 13
PGM0, PGM1
ORDERING INFORMATION
IIP2
1
20 IVN2
Part Number
SA2005FPA
SA2005FSA
Package
DIP-20
IIN2
IIN1
2
19
SOIC-20
IVN3
IIP3
3
18 IIP1
IVN1
17
4
IIN3
GND
5
16
15
14
13
12
11
VREF
VDD
6
TEST
VSS
7
FOUT
PGM1
PGM0
NC
8
DIR
9
TCLK
10
DR-01571
Figure 2: Pin connections: Package: DIP-20, SOIC-20
3/10
http://www.sames.co.za
SA2005F
ssaammeess
FUNCTIONAL DESCRIPTION
The SAMES SA2005F is a CMOS mixed signal integrated
circuit, which performs three phase power/energy calculations
over a range of 1000:1, to an overall accuracy of better than
Class 1.
through clamping diodes, in conjunction with the amplifiers
input configuration. The feedback loops from the outputs of the
amplifiers A and A generate virtual shorts on the signal inputs.
I
V
Exact duplications of the input currents are generated for the
analogprocessingcircuitry.
The SA2005F is functionally similar to the SA9105F. No
external loop capacitors are required and an precision
oscillator is integrated on chip.
VoltageReferenceConnection(VREF)
A bias resistor of 24k provides an optimum bias conditions on
chip. Calibration of the SA2005F should be done on the
voltage inputs of the device as described in Typical
Applications.
The integrated circuit includes all the required functions for 3-
phase power and energy measurement such as oversampling
A/D converters for the voltage and current sense inputs, power
calculation and energy integration. Internal offsets are
eliminated through the use of cancellation procedures.
CurrentSenseInputs(IIN1, IIP1, IIN2, IIP2, IIN3, IIP3)
At rated current the resistor values should be selected for input
currents of 16µA . Referring to figure 5, the resistors R1 and
RMS
The SA2005F generates pulses with a frequency proportional
to the power measured. The pulse rate follows the
instantaneous power measured. The pulse frequency is
proportionaltothetotalsumofthethreephases.
R2 on current channel 1, resistors R3 and R4 on current
channel 2 and resistors R5 and R6 on current channel 3, define
the current level into the current sense inputs of the SA2005F.
The current sense inputs saturates at an input current of ±25µA
peak. Resistors R25, R26 and R27 are the current transformer
termination resistors. The voltage drop across the termination
resistors should be at least 20mV at rated conditions. Values
forthecurrentsenseinputsarecalculatedasfollows:
POWER CALCULATION
In the application circuit (figure 5), the mains voltages from V1,
V2 and V3, are converted to currents and applied to the voltage
senseinputsIVP1, IVP2andIVP3.
R =R =(I /16µA )xR /2
RMS
1
2
L
25
R =R =(I /16µA )xR /2
RMS
3
4
L
26
The current levels on the voltage sense inputs are derived from
the mains voltages (3 x 230VAC) being divided down to 14V
through voltage dividers. The resulting input currents into the
R =R =(I /16µA )xR /2
RMS
5
6
L
27
Where:
A/D converters are 14µA through the resistors R8, R9 and
RMS
I =Linecurrent/CT-ratio
L
R10.
V
DD
For the current sense inputs the voltage drop across the
current transformers terminating resistors are converted to
IIP
currents of 16µA at rated conditions, by means of resistors
RMS
R1, R2 (Phase 1); R3, R4 (Phase 2) and R5, R6 (Phase 3). The
signals providing the current information are applied to the
currentsensorinputsIIN1, IIP1, IIN2, IIP2andIIN3, IIP3.
V
V
SS
CURRENT
SENSOR
INPUTS
AI
DD
IIN
The output frequency of the SA2005F energy metering
integrated circuit at rated conditions is 64Hz on FOUT
(PGM0=0, PGM1=1).
V
SS
V
DD
IVP
One pulse (measured in Watt second) correspond to an energy
measuredof3xI
xV
/64Hz.
VOLTAGE
SENSOR
INPUT
RATED
RATED
V
SS
A
V
ForamoredetaileddescriptionseetheInputSignalssection.
INPUT SIGNALS
GND
Analog Input Configuration
DR-01288
The current and voltage sensor inputs are illustrated in figure 3.
These inputs are protected against electrostatic discharge
Figure 3: Analog Input Internal Configuration
4/10
http://www.sames.co.za
SA2005F
ssaammeess
Voltage Sense Inputs (IVN1, IVN2, IVN3)
The current into the voltage sense inputs (virtual ground)
DIR as a logic 1. The DIR pin may be used to drive a LED in
order to indicate reverse energy flow.
should be set to 14µA
at rated voltage conditions. The
RMS
individual mains voltages are divided down to 14V
per
RMS
phase. The resistors R8, R9 and R10 set the current for the
voltage sense inputs. The voltage sense inputs saturate at an
input current of ±25µA peak.
Frequency Output (FOUT)
The sum of the measured power, from the three phases
produce a pulse rate of 64Hz or 1160Hz (mode 3), at rated
conditions on FOUT. The format of the pulse output signal,
which provides power/energy and direction information is
shown in figure 4. Refer to Pulse Programming Inputs for pulse
widths.
Pulse Programming Inputs (PGM0, PGM1)
The pulse programming inputs PGM1 and PGM0 define the
representation of energy measured by the device on FOUT.
The table below shows the difference between the various
modes.
The following equation may be used for calculating the output
frequency:
Forward
Pulse
Reverse
Pulse
Frequency
Mode PGM1 PGM0 at rated
conditions
f = 11.16 x FOUTX x ((I x I )+(I x I )+(I x I )) / 3 x I
R
Width
Width
I1
V1
I2
V2
I3
V3
Where:
FOUTX = Nominal rated frequency (64Hz/1160Hz)
0
0
1
1
0
1
2
3
64Hz
64Hz
1.14ms
1.14ms
1.14ms
71µs
3.4ms
1.14ms
1.14ms
71µs
0
1
0
1
I , I , I = Input currents for current sensor inputs (16µA at rated
I1 I2 I3
line current)
64Hz
I , I , I = Input currents for voltage sensor inputs (14µA at
V3
V1
V2
1160Hz
rated line voltage)
I = Reference current (typically 50µA)
R
Test Inputs (TCLK, TEST)
An integrated anti-creep function ensures that no pulses are
generated at zero line currents.
The TEST and TCLK inputs are manufacturers test pins and
must be connected to VSS in a metering application.
ELECTROSTATIC DISCHARGE (ESD) PROTECTION
The SA2005F integrated circuit's inputs/outputs are protected
against ESD.
OUTPUT SIGNALS
Direction Indication (DIRO)
The SA2005F indicates the measured energy flow direction on
pin DIR. A logic 0 on pin DIR indicates reverse energy flow.
Reverse energy flow is defined as the condition where the
voltage sense input and current sense input are out of phase
(greater than 90 degrees). Positive energy flow, when voltage
sense and current sense input are in phase, is indicated on pin
POWER CONSUMPTION
The overall power consumption rating of the SA2005F
integrated circuit is less than 50 mW with a 5V supply.
MODE 0
FOUT
MODE1
FOUT
MODE2
FOUT
MODE3
FOUT
DIR
DR-01582
Note: Frequency of pulse rate in MODE 3 is 18 times higher than other modes
Figure 4: FOUT options
5/10
http://www.sames.co.za
SA2005F
ssaammeess
TYPICAL APPLICATION
VOLTAGEDIVIDER
In figure 5, the components required for the three phase
power/energy metering section of a meter, is shown. The
application uses current transformers for current sensing. The
4-wire meter section is capable of measuring 3x230V/80A with
precision better than Class 1.
The voltage divider is calculated for a voltage drop of 14V.
Equationsforthevoltagedividerinfigure5are:
RA=R16+R19+R22
RB=R8||(R13+P1)
Combiningthetwoequationsgives:
The most important external components for the SA2005F
integrated circuit are the current sense resistors, the voltage
sense resistors as well as the bias setting resistor.
(RA+RB)/230V=RB/14V
A 5k trimpot is used in each of voltage channel for meter
calibration. The center position of the pot is used in the
calculations. P1 = 2.5k and values for resistors R13 = 22k and
R8=1Mischosen.
BIAS RESISTOR
R7 defines all on-chip and reference currents. With R7=24kW,
optimum conditions are set. Device calibration is done on the
voltage inputs of the device.
Substitutingthevaluesresultin:
RB=23.9k
RA=RBx(230V/14V-1)
RA=368.9k.
CT TERMINATION RESISTOR
The voltage drop across the CT termination resistor at rated
current should be at least 20mV. The CT’s used have low
phase shift and a ratio of 1:2500.The CT is terminated with a
2.7W resistor giving a voltage drop across the termination
resistor 864mV at rated conditions (Imax for the meter).
Resistor values of R16, R19 and R22 is chosen to be 120k,
120kand130k.
CURRENT SENSE RESISTORS
The three voltage channels are identical so R14= R15= R16 =
R17=R18=R19andR20=R21=R22.
The resistors R1 and R2 define the current level into the
current sense inputs of phase one of the device. The resistor
values are selected for an input current of 16µA on the current
inputs at rated conditions.
According to equation described in the Current Sense inputs
section:
R1 = R2 = (I / 16µA ) x R / 2
SH
L
=80A/2500/16µAx2.7W /2
=2.7kW
I =Linecurrent/CTRatio
L
The three current channels are identical so R1 = R2 = R3 = R4
=R5=R6.
6/10
http://www.sames.co.za
NEUTRAL
R20
R17
R14
R15
R16
GND
V3 In
R12
R11
R13
P3
P2
P1
R18
R21
V2 In
R19
R22
V1In
U1
R1
CT1
CT2
CT3
19
16
17
20
3
IIN1
GND
IVN1
IVN2
IVN3
GND
C5
R25
R8
R2
18
IIP1
R9
C4
GND
R3
R10
2
C3
IIN2
R26
VDD
R28
D1
9
DIR
R4
1
IIP2
GND
VSS
R29
R5
D2
5
8
IIN3
FOUT
VDD
R27
VDD
13
12
10
PGM1
PGM0
TCLK
TEST
VDD
R6
4
IIP3
R23
C2
GND
R7
15
V3 Out
V2 Out
V1 Out
VREF
GND
7
6
C1
C6
R24
14
VSS
Dr-01572
VSS
SA2002F
VSS
VSS
SA2005F
ssaammeess
Parts List for Application Circuit: Figure 5
Symbol
Description
Detail
DIP-20/SOIC-20
Note 1
U1
SA2005F
Resistor, 2.7k, 1/4W, 1% metal
Resistor, 2.7k, 1/4W, 1% metal
Resistor, 2.7k, 1/4W, 1% metal
Resistor, 2.7k, 1/4W, 1% metal
Resistor, 2.7k, 1/4W, 1% metal
Resistor, 2.7k, 1/4W, 1% metal
Resistor, 24k, 1/4W, 1%, metal
Resistor, 1M, 1/4W, 1%, metal
Resistor, 1M, 1/4W, 1%, metal
Resistor, 1M, 1/4W, 1%, metal
Resistor, 22k, 1/4W, 1%, metal
Resistor, 22k, 1/4W, 1%, metal
Resistor, 22k, 1/4W, 1%, metal
R1
R2
Note 1
R3
Note 1
R4
Note 1
R5
Note 1
R6
Note 1
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
Resistor, 120k, 1/4W, 1%, metal
Resistor, 120k, 1/4W, 1%, metal
Resistor, 120k, 1/4W, 1%, metal
Resistor, 120k, 1/4W, 1%, metal
Resistor, 120k, 1/4W, 1%, metal
Resistor, 120k, 1/4W, 1%, metal
Resistor, 130k, 1/4W, 1%, metal
Resistor, 130k, 1/4W, 1%, metal
R21
R22
R23
R24
R25
R26
R27
P1
Resistor, 130k, 1/4W, 1%, metal
Resistor, 1k, 1/4W, 1%, metal
Resistor, 1k, 1/4W, 1%, metal
Resistor, 2.7R, 1/4W, 1%, metal
Resistor, 2.7R, 1/4W, 1%, metal
Resistor, 2.7R, 1/4W, 1%, metal
Trim pot, 5k, Multi turn
Note 1
Note 1
Note 1
Trim pot, 5k, Multi turn
P2
P2
Note 1
Trim pot, 5k, Multi turn
C1
Capacitor, 220nF
C2
Capacitor, 220nF
Capacitor, 820nF
C3
Note 2
Note 2
Note 2
Note 3
C4
Capacitor, 820nF
C5
Capacitor, 820nF
C6
Capacitor, 820nF
LED1
LED2
CT1
CT2
CT3
3mm Light emitting diode
3mm Light emitting diode
Current Transformer, TZ76
Current Transformer, TZ76
Current Transformer, TZ76
Note 1: Resistor (R1 to R6) values are dependant on the selection of the termination resistors (R25 to R27) and CT combination.
Note 2: Capacitor values may be selected to compensate for phase errors caused by the current transformers.
Note 3: Capacitor C6 to be positioned as close as possible to supply pins V and V of U1 as possible.
DD
SS
8/10
http://www.sames.co.za
SA2005F
ssaammeess
NOTES:
9/10
http://www.sames.co.za
SA2005F
ssaammeess
DISCLAIMER:
The information contained in this document is confidential and proprietary to South African Micro-Electronic Systems (Pty) Ltd
("SAMES") and may not be copied or disclosed to a third party, in whole or in part, without the express written consent of SAMES.
The information contained herein is current as of the date of publication; however, delivery of this document shall not under any
circumstances create any implication that the information contained herein is correct as of any time subsequent to such date.
SAMES does not undertake to inform any recipient of this document of any changes in the information contained herein, and
SAMES expressly reserves the right to make changes in such information, without notification, even if such changes would render
information contained herein inaccurate or incomplete. SAMES makes no representation or warranty that any circuit designed by
reference to the information contained herein, will function without errors and as intended by the designer.
Any sales or technical questions may be posted to our e-mail address below:
energy@sames.co.za
For the latest updates on datasheets, please visit our web site:
http://www.sames.co.za.
SOUTH AFRICAN MICRO-ELECTRONIC SYSTEMS
DIVISION OF LABAT TECHNOLOGIES (PTY) LTD
Tel: (012) 333-6021
Tel: Int +27 12 333-6021
Fax: (012) 333-8071
Fax: Int +27 12 333-8071
33 ELAND STREET
KOEDOESPOORT INDUSTRIAL AREA
PRETORIA
P O BOX 15888
33 ELAND STREET
LYNN EAST 0039
REPUBLIC OF SOUTH AFRICA
REPUBLIC OF SOUTH AFRICA
10/10
http://www.sames.co.za
相关型号:
SA2005M
Pin Selectable Three Phase Power / Energy Metering IC for Stepper Motor / Impulse Counter Applications with Anti Tamper Features
SAMES
SA2005MPA
Pin Selectable Three Phase Power / Energy Metering IC for Stepper Motor / Impulse Counter Applications with Anti Tamper Features
SAMES
SA2005MSA
Pin Selectable Three Phase Power / Energy Metering IC for Stepper Motor / Impulse Counter Applications with Anti Tamper Features
SAMES
SA2005P
Programmable Three Phase Power / Energy Metering IC for Stepper Motor / Impulse Counter Applications
SAMES
SA2005PPA
Programmable Three Phase Power / Energy Metering IC for Stepper Motor / Impulse Counter Applications
SAMES
SA2005PSA
Programmable Three Phase Power / Energy Metering IC for Stepper Motor / Impulse Counter Applications
SAMES
©2020 ICPDF网 联系我们和版权申明