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SA9105F THREE PHASE BIDIRECTIONAL POWER/ENERGY METERING IC WITH INSTANTANEOUS PULSE OUTPUT
FEATURES
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Performs bidirectional one, two or three phase power and energy measurement Meets the IEC 521/1036 Specification requirements for Class 1 AC Watt hour meters Operates over a wide temperature range Uses current transformers for current sensing
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Excellent long term stability Easily adaptable to different signal levels Precision voltage reference on-chip Two pulse output formats available Protected against ESD
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DESCRIPTION The SAMES SA9105F Three Phase bidirectional Power/Energy metering integrated circuit generates pulse rate outputs for positive and negative energy directions, the frequency of which is proportional to the power consumption. The SA9105F performs the calculation for active power. The method of calculation takes the power factor into account. Energy consumption is determined by the power measurement being integrated over time. This innovative universal three phase power/ energy metering integrated circuit is ideally suited for applications such as residential and industrial energy metering and control. The SA9105F integrated circuit is available in 40 pin dual-in-line plastic (DIP-40), as well as in 44 pin plastic leaded chip carrier (PLCC-44) package types.
PIN CONNECTIONS
CIN1 CIP2 CIN2 CIP3 CIN3 IIN1 IIP1 IIN2 IIP2 IIN3 IIP3 COPP CONP CIPP CINP V SS TP17 TP18 OSC1
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 40 CIP1 39 COP1 38 CON1 37 CON2 36 COP2 35 GND 34 IVP1 33 IVP2 32 IVP3 31 COP3 30 CON3 29 VREF 28 V DD 27 TP27 26 TP26 25 DIR 24 TP24 23 FOUT2 22 TP22 21 FOUT1 DR-00946
OSC2 20
Package: DIP-40
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4366 PDS039-SA9105F-001 Rev. B 09-01-97
SA9105F PIN CONNECTIONS
DIR TP24 FOUT2 TP22 FOUT1 N.C. OSC2 OSC1 TP18 TP17 V SS
39 38 37 36 35 34 33 32 31 30 29
TP26 TP27 V DD VREF N.C. CON3 COP3 IVP3 IVP2 IVP1 GND
40 41 42 43 44 1 2 3 4 5 6
28 27 26 25 24 23 22 21 20 19 18
CINP CIPP CONP COPP N.C. IIP3 IIN3 IIP2 IIN2 IIP1 IIN1
7
8
9
10
11 12 13
14
15 16
17
COP2 CON2 CON1
DR-00947
Package: PLCC-44 BLOCK DIAGRAM
16 CONNECTIONS FOR LOOPCAPS
COP1 CIP1 N.C. CIN1 CIP2 CIN2 CIP3 CIN3
VD D VSS
IVP1 IVP2 IVP3 IIP1 IIN1 IIP2 IIN2 IIP3 IIN3 GND OSC1 VREF
ANALOG INTEG. SIGNAL & PROAVERAGE CESSING
POWER
FOUT1
TO PULSE RATE
FOUT2 DIR
REF
TIMING & CONTROL
OSC
OSC2
DR-00948
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SA9105F ABSOLUTE MAXIMUM RATINGS * Parameter Symbol Supply Voltage VDD-VSS Current on any Pin IPIN Storage Temperature TSTG Operating Temperature TO Current at any pin IP
Min -0.3 -150 -40 -40 -100
Max 6.0 +150 +125 +85 +100
Unit V mA C C mA
* 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 conditions above those indicated in the operation sections of this specification, is not implied. Exposure to Absolute Maximum Ratings for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (Over the temperature range -10C to +70C#, unless otherwise specified.) Parameter Operating Temp. Range # Supply Voltage Supply Current Nonlinearity of Power Calculation Symbol TO VDD-VSS IDD Min Typ Max Unit Condition -25 +85 C 4.5 5.5 10 +0.3 V mA % 1% - 100% of rated power Peak value Peak value IOL = 5mA IOH = -2mA Specified linearity Min and max limits
-0.3
Current Sensor Inputs (Differential) Input Current Range III Voltage Sensor Inputs (Asymmetric) Input Current Range IIV Pins FOUT1,FOUT2,DIR Output Low Voltage VOL Output High Voltage VOH Pulse Rate: FOUT1, FOUT2 fp Oscillator Pin VREF Ref. Current Ref. Voltage
#
-25 -25
+25 +25 VSS+1
A A V V Hz Hz
VDD-1 0 0 64 180
Recommended crystal: TV colour burst crystal, f = 3.5795 MHz With R = 24 k -IR 45 50 55 A connected to VSS VR 1.1 1.3 V Referred to VSS
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Extended Operating Temperature Range available on request. sames
SA9105F PIN DESCRIPTION
Pin PLCC 6 42 29 5 4 3 18 19 20 21 22 23 32 33 35 37 39 9 10 8 7 1 2 26 25 13 11 15 14 17 16 28 27 43 41 30 31 36 38 40
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Pin DIP 35 28 16 34 33 32 6 7 8 9 10 11 19 20 21 23 25 38 39 37 36 30 31 13 12 1 40 3 2 5 4 15 14 29 27 17 18 22 24 26
Designation GND VDD VSS IVP1 IVP2 IVP3 IIN1 IIP1 IIN2 IIP2 IIN3 IIP3 OSC1 OSC2 FOUT1 FOUT2 DIR CON1 COP1 CON2 COP2 CON3 COP3 CONP COPP CIN1 CIP1 CIN2 CIP2 CIN3 CIP3 CINP CIPP VREF TP27 TP17 TP18 TP22 TP24 TP26
Description Ground Positive Supply Voltage Negative Suply Voltage Analog input for Voltage : Analog input for Voltage : Analog input for Voltage : Inputs for current sensor :
Phase 1 Phase 2 Phase 3 Phase 1
Inputs for current sensor : Phase 2 Inputs for current sensor : Phase 3 Connections for crystal or ceramic resonator (OSC1 = Input ; OSC2 = Output) Pulse rate outputs Direction indication output Connections for outer loop capacitors of A/D converters
Connections for inner loop capacitors of A/D converters
Connection for current setting resistor Test pin. Connect to VSS Manufacturer's test pins (Leave unconnected)
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SA9105F
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SA9105F 2. Analog Input Configuration The current and voltage sensor inputs are illustrated below. These inputs are protected against electrostatic discharge through clamping diodes, in conjunction with the amplifiers input configuration. The feedback loops from the outputs of the amplifiers AI and AV generate virtual shorts on the signal inputs. Exact duplications of the input currents are generated for the analog processing circuitry
V DD
IIP
CURRENT SENSOR INPUTS
V SS
A
I
V DD
IIN
V SS V DD
IVP VOLTAGE SENSOR INPUT
V SS
AV
GND
DR-00949
3.
Electrostatic Discharge (ESD) Protection The SA9105F integrated circuit's inputs/outputs are protected against ESD. Power Consumption The overall power consumption rating of the SA9105F integrated circuit is less than 50mW with a 5V supply.
4.
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SA9105F 5. Pulse Output Signals The calculated power is divided down to a pulse rate of 64Hz, for rated conditions on both FOUT1 and FOUT2. The format of the pulse output signal, which provides power/energy and direction information, is the only difference between the signals on FOUT1 and FOUT2. The direction of the energy flow is defined by the mark/space ratio on FOUT1, while the pulse width defines the direction on FOUT2.
Positive Energy Flow Negative Energy Flow
Wave form on FOUT1
Wave form on FOUT2
t pp
m m m m
t pp
t pn
m m
t pn
m m
t pp = 1.1ms
t pn = 3.4ms
Wave form on DIR
DR-00950
An integrated anticreep function ensures no metering at zero line currents. The formula for calculating the Output Frequency (f) is given below: FOSC (II1 IV1) + (II2 IV2 ) + (II3 IV3 ) f = 11.16 * FOUTX * * 3.58MHz 3 * IR2 Where FOUTX FOSC II1, II2, II3 IR = Nominal rated frequency (64Hz) = Oscillator frequency (2MHz ...... 4MHz) = Input currents for current sensor inputs (16A at rated line current) = Reference current (typically 50A)
IV1, IV2 , IV3 = Input currents for voltage sensor inputs (14A at rated line voltage)
TYPICAL APPLICATION In the Application Circuit (Figure 1), the components required for a three phase power metering application are shown. Terminated current transformers are used for current sensing. The most important external components for the SA9105F integrated circuit are: sames
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SA9105F C7, C9, C10 and C 11 are the outer loop capacitors for the integrated oversampling A/D converters. The typical value of C7 is 2.2nF and the value of C9, C10 and C11 is 560pF. The actual values determine the signal to noise and stability performance. The tolerances should be within 10%. C4, C5, C6 and C8 are the inner loop capacitors for the integrated oversampling A/D converters. The typical value of C4, C5, C 6 and C 8 is 3.3nF. Values smaller than 0.5nF and larger than 5nF should be avoided. Terminated current sensors (current transformers) are connected to the current sensor inputs of the SA9105F through current setting resistors (R8 ..R13). The resistor values should be selected for an input current of 16ARMS into the SA9105F, at the rated line current. The values of these resistors should be calculated as follows: Phase 1: R8 = R 9 = (IL1/16ARMS) * R18/2 Phase 2: R10 = R11 = (IL2/16A RMS) * R19/2 Phase 3: R12 = R13 = (IL3/16A RMS) * R20/2 Where I LX = Secondary CT current at rated conditions. R18, R19 and R20 = Current transformer termination resistors for the three phases. R1 + R1A, R4 and R15 set the current for the phase 1 voltage sense input. R2 + R2A , R5 + P 5 and R16 set the current for phase 2 and R3 + R 3A, R6 + P6 and R17 set the current for phase 3. The values should be selected so that the input currents into the voltage sense inputs (virtual ground) are set to 14ARMS for nominal line voltage. Capacitors C1, C2 and C3 are for decoupling and phase compensation. R14 + P14 defines all on-chip bias and reference currents. With R 14+ P14 = 24k, optimum conditions are set. R14 may be varied within 10% for calibration purposes. Any changes to R14 will affect the output quadratically (i.e: R = +5%, f = +10%). XTAL is a colour burst TV crystal (f = 3.5795 MHz) for the oscillator. The oscillator frequency is divided down to 1.7897 MHz on-chip, to supply the digital circuitry and the A/D converters.
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SA9105F Figure 1: Application Circuit for Three Phase Power/Energy Measurement.
M AINS VOL TAGES
R1
L IN E 1 L IN E 2 L IN E 3 N
R2 R3
R1A R2A R3A C4
0V
C5
1 2 3
40 39 38
5V
C9 R7
F ROM CTs
R18
4
37
C6
5 36 35
C10 R8 R9
6 7
V I1 P V I1 N V I2 P V I2 N V I3 P V I3 N
C7 R20 R19
R10 R11 R12 R13
SA 91 05 F D IP - 4 0 IC - 1
34 33 32 31
R15 +C1 R16 +C2 R17 +C3 R6 C11 R5 R4 R21 C14
8 9 10 11 12 13 14
30 29 28 27 26 25 24 23 22 21
P6
P5
C8
15 16 17
C13
0V D IR F OU T 2 F OU T 1 0V 0V 0V
0V
18 19 20
XTAL D R- 0 0 9 5 1
C12
R1 4 P14
0V
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SA9105F Parts List for Application Circuit: Figure 1
Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
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Symbol IC-1 XTAL R1 R1A R2 R2A R3 R3A R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 P5 P6 P14 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11
Description SA9105FPA Crystal, 3.5795 MHz Resistor, 200k, 1%, 1/4W Resistor, 180k, 1%, 1/4W Resistor, 200k, 1%, 1/4W Resistor, 180k, 1%, 1/4W Resistor, 200k, 1% , 1/4W Resistor, 180k, 1%, 1/4W Resistor, 24k, 1%, 1/4W Resistor, 22k, 1%, 1/4W Resistor, 22k, 1%, 1/4W Resistor, 820 , 1%, 1/4W Resistor Resistor Resistor Resistor Resistor Resistor Resistor, 22k, 1%, 1/4W Resistor, 1M, 1%, 1/4W Resistor, 1M, 1%, 1/4W Resistor, 1M, 1%, 1/4W Resistor Resistor Resistor Resistor, 820, 1%, 1/4W Potentiometer, 4.7k Potentiometer, 4.7k Potentiometer, 4.7k Capacitor, electrolytic, 1F, 16V Capacitor, electrolytic, 1F, 16V Capacitor, electrolytic, 1F, 16V Capacitor, 3.3nF Capacitor, 3.3nF Capacitor, 3.3nF Capacitor, 2.2nF Capacitor, 3.3nF Capacitor, 560pF Capacitor, 560pF Capacitor, 560pF
Detail DIP-40 Colour burst TV
Note 1 Note 1 Note 1 Note 1 Note 1 Note 1
Note 1 Note 1 Note 1 Multi turn Multi turn Multi turn Note 2 Note 2 Note 2
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SA9105F Parts List for Application Circuit: Figure 1 (Continued)
Item 41 42 43 Symbol C12 C13 C14 Description Capacitor, 820nF Capacitor, 100nF Capacitor, 100nF Detail Note 3
Note 1: Resistor (R8, R9, R10, R11, R12 and R13) values are dependant upon the selected values of the current transformer termination resistors R18, R19 and R20. Note 2: Capacitor values may be selected for DC blocking and to compensate for phase errors caused by the current transformers. Note 3: Capacitor (C12) to be positioned as close to Supply Pins (VDD & VSS) of IC-1, as possible.
ORDERING INFORMATION Part Number Package SA9105FPA DIP-40 SA9105FFA PLCC-44
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SA9105F
Disclaimer: The information contained in this document is confidential and proprietary to South African MicroElectronic 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 (Pty) Ltd P O Box 15888, 33 Eland Street, Lynn East, Koedoespoort Industrial Area, 0039 Pretoria, Republic of South Africa, Republic of South Africa Tel: Fax:
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012 333-6021 012 333-8071 sames
Tel: Fax:
Int +27 12 333-6021 Int +27 12 333-8071

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