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SA9602E SINGLE PHASE UNIDIRECTIONAL POWER/ENERGY METERING IC WITH INSTANTANEOUS PULSE OUTPUT
FEATURES n Pin and functionally compatible with the SA9102E with reduced external components n Performs unidirectional power and energy measurement n Meets the IEC 521/1036 Specification requirements for Class 1 AC Watt hour meters n Protected against ESD
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Total power consumption rating below 25mW Adaptable to different types of current sensors Operates over a wide temperature range Precision voltage reference on-chip Different pulse rate options available
PIN CONNECTIONS DESCRIPTION The SAMES SA9602E is an enhancement of the SA9102E, as no external capacitors are required for the A/D converters. The SAMES SA9602E Single Phase unidirectional Power/Energy metering integrated circuit generates a pulse rate output, 1 IIN the frequency of which is proportional to the power consumption. The SA9602E performs 2 IIP the calculation for active power. VR EF 3 The method of calculation takes the power factor into account. T E ST 4 Energy consumption can be determined by 5 V DD the power measurement being integrated over time. OS C2 6 This innovative universal single phase power/ OS C1 7 energy metering integrated circuit is ideally suited for energy calculations in applications DR-0108 8 such as residential municipal metering and factory energy metering and control. The SA9602E integrated circuit is available in Package: DIP-14 both 14 and 20 pin dual-in-line plastic (DIP-14/ DIP-20), as well as 20 pin small outline (SOIC20) package types.
4448 PDS039-SA9602E-001 REV. D
1 4 GN D 13 12 11 10 9 8
IVP T P 12 T P 11 V SS FO UT 2 FO UT 1
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SA9602E PIN CONNECTIONS
IIN IIP VREF TP4 TP5 TP6 TEST V DD
1 2 3 4 5 6 7 8
20 GN D 19 IVP 18 TP18 17 TP17 16 TP16 15 14 13 12 11
TP15 V SS FOU T2 FOU T1 OSC 1
9 TP9 OSC 2 10
DR-01095
Package: DIP-20 SOIC-20 BLOCK DIAGRAM
V DD V SS
IIP
POWER
IIN
FOUT1
A NALOG SIGNA L PROCE-
INTEGRA TOR
POWER TO FREQUENCY
FOUT2
VOLTA GE REF.
IVP GND
SSING OSC TIMING
D R-0 1 08 9
VREF
OSC1
OSC2
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SA9602E ABSOLUTE MAXIMUM RATINGS* Parameter Symbol Supply Voltage VDD -VSS Current on any pin IPIN Storage Temperature Operating Temperature TSTG TO Min -0.3 -150 -40 -40 Max 6.0 +150 +125 +85 Unit V mA C 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. ELECTRICAL CHARACTERISTICS (VDD = 2.5V, VSS = -2.5V, over the temperature range -10C to +70C#, unless otherwise specified.) Parameter Operating temperature range # Supply Voltage: Positive Supply Voltage: Negative Supply Current: Positive Supply Current: Negative Symbol Min Typ Max Unit Condition
TO VDD V SS IDD I SS
-25 2.25 -2.75 5 5
+85 2.75 -2.25 6 6
C V V mA mA
Current Sensor Inputs (Differential) Input Current Range III -25 +25 A Peak value
Voltage Sensor Input (Asymmetrical) Input Current Range Pins FOUT1, FOUT2 Output Low Voltage Output High Voltage Pulse Rate FOUT1 FOUT21 sames IIV V OL VOH fP fP2 -25 +25 VSS+1 V DD-1 10 0.5 fP/290
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A V V Hz Hz
Peak value IOL = 5mA IOH = -2mA Specified linearity Min and max limits
1160 3000
SA9602E ELECTRICAL CHARACTERISTICS (Continued) (VDD = 2.5V, VSS = -2.5V, over the temperature range -10C to +70C #, unless otherwise specified.) Parameter Symbol Min Typ Max Unit Condition Pin VREF With R = 24k Ref. Current -I R 45 50 55 A connected to VSS Ref. Voltage VR 1.1 1.3 V Referred to VSS Oscillator Recommended crystal: TV colour burst crystal f = 3.5795 MHz Note1:
#
Two additional bondout options of FOUT2 are available on request: fp/4 and fp/16.
Extended Operating Temperature Range available on request.
PIN DESCRIPTION 14 Pin 14 5 10 13 1 2 7 6 8 9 3 4 20 Pin 20 8 14 19 1 2 11 10 12 13 3 7 5 6 9 11 12 15 16 17 18
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Designation GND VDD V SS IVP IIN IIP OSC1 OSC2 FOUT1 FOUT2 VREF TEST TP5 TP6 TP9 TP11 TP12 TP15 TP16 TP17 TP18 sames
Description Ground Positive Supply Voltage Negative Supply Voltage Analog input for Voltage Inputs for current sensor Connections for crystal or ceramic resonator (OSC1 = Input ; OSC2 = Output) First pulse rate output Second pulse rate output Connection for current setting resistor Test Pin. Tie to VSS for protection in case of HV transients Test Pin (Leave unconnected)
SA9602E FUNCTIONAL DESCRIPTION The SA9602E is a CMOS mixed signal Analog/Digital integrated circuit, which performs power/energy calculations across a power range of 1000:1, to an overall accurancy of better than Class 1. The SA9602E in both DIP-20 and SOIC-20 package options is a direct replacement for the SA9102E with the advantage of no external loop capacitors. The integrated circuit includes all the required functions for 1-phase power and energy measurement such as two 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. The SA9602E generates pulses, the frequency of which is proportional to the power consumption. Two frequency outputs (FOUT1 and FOUT2) are available, with a third frequency option available on request. The pulse rate follows the instataneous power consumption measured. 1. Power Calculation In the Application Circuit (Figure 1), the voltage drop across the shunt will be between 0 and 16mVRMS (0 to 80A through a shunt resistor of 200). This voltage is converted to a current of between 0 and 16A RMS, by means of resistors R1 and R2. The current sense input saturates at an input current of 25A peak. For the voltage sensor input, the mains voltage (230VAC) is divided down through a divider to 14V. The current into the A/D converter input is set at 14ARMS at nominal mains voltage, via resistor R4 (1M). In this configuration, with a mains voltage of 230V and a current of 80A, the output frequency of the SA9602E power meter chip at FOUT1 (Pin 12) is 1.16kHz. In this case 1 pulse will correspond to an energy consumption of 18.4kW/1160Hz = 15.9Ws. The output frequency at FOUT2 is FOUT1 /290 (i.e. The frequency ouput at FOUT1 divided by 290). Analog Input Configuration The input circuitry of the current and voltage sensor inputs are illustrated below. These inputs are protected against electrostatic discharge through clamping diodes. 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 signal processing circuitry.
2.
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SA9602E
VD D
IIP
C U R R EN T S EN SO R IN P U TS
VS S VD D
AI
IIN
VS S VD D
IV P VOLTA G E S EN SO R IN P U T
VSS
AV
GN D D R - 0 10 90
3. 4. 5.
Electrostatic Discharge (ESD) Protection The SA9602E integrated circuit's inputs/outputs are protected against ESD . Power Consumption The power consumption rating of the SA9602E integrated circuit is less than 25mW. Pulse Output Signals The diagram below shows the behaviour of the instantaneous pulse output, FOUT1, with respect to the power consumption.
v MAINS
t
POWER Vx I
t F OUT DR-0 1 2 8 2 tP t
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SA9602E The output on pin FOUT is a pulse density signal representing the instantaneous power/ energy measurement. The minimum timing characteristics are shown in the following diagram.
71us 71us min.
DR-01151
TYPICAL APPLICATIONS In the Application Circuits (Figures 1 and 2), the components required for power metering applications, are shown. In Figure 1 a shunt resistor is used for current sensing. In this application, the circuitry requires a +2.5V, 0V, -2.5V DC supply. In the case of Figure 2, when using a current transformer for current sensing, a +5V, 0V DC supply is sufficient. The most important external components for the SA9602E integrated circuit are: R2, R1 and RSH are the resistors defining the current level into the current sense input. The values should be selected for an input current of 16ARMS into the SA9602E at maximum line current. Values for RSH of less than 200 should be avoided. R1 = R2 = (IL/16ARMS) * RSH/2 Where IL = Line current RSH = Shunt resistor/termination resistor R3, R6 and R4 set the current for the voltage sense input. The values should be selected so that the input current into the voltage sense input (virtual ground) is set to 14ARMS. R7 defines all on-chip bias and reference currents. With R7 = 24k, optimum conditions are set. R7 may be varied within 10% for calibration purposes. Any change to R7 will affect the output quadratically (i.e.: R7 = +5%, fP = +10%). The formula for calculating the output frequency is given below: FOSC II .IV f = 11.16 * FOUTX * *2 3.58MHz IR Where FOUTX = Normal rated frequency (4Hz or 1160Hz)
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SA9602E FOSC II IV IR = Oscillator frequency (2MHz ...... 4MHz) = Input current for current input (16ARMS at rated) = Input current for voltage input (14ARMS at rated) = Reference current (typically 50A)
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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LOA D
R6
R SH
Figure 1: Application Circuit using a Shunt Resistor for Current Sensing.
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R2 R4 R1
1 2 3 4 5 6 7
R3
C 11
IC-1
R5 X TA L
14 13 12 11 10 9 8 1
R7 C 15
2 NC 3
IC-2
6 NC 5 4
D1 R9 C 13 D2 R 10 C 14 ZD 2 ZD 1 C9
C 10 R8
SU PPL Y
D R -0 10 9 1
SA9602E
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SA9602E Parts List for Application Circuit: Figure 1 Item Symbol Description 1 IC-1 SA9602E 2 IC-2 Optocoupler 4N35 3 D1 Diode, Silicon, 1N4148 4 D2 Diode, Silicon, 1N4148 5 ZD1 Diode, Zener, 2.4V, 200mW 6 ZD2 Diode, Zener, 2.4V, 200mW 7 XTAL Crystal, 3.5795MHz 8 R1 Resistor, 1% metal 9 R2 Resistor, 1% metal 10 R3 Resistor, 390k, (230VAC) 1%, metal 11 R4 Resistor, 1M, 1/4W, 1%, metal 12 R5 Resistor, 470, 2W, 5%, carbon 13 R6 Resistor, 24k, 1/4W, 1%, metal 14 R7 Resistor, 24k, 1/4W, 1%, metal 15 R8 Resistor, 680, 1/4W, 1% 16 R9 Resistor, 680, 1/4W, 1% 17 R10 Resistor, 680, 1/4W, 1% 18 C9 Capacitor, 100nF 19 C10 Capacitor, 100nF 20 C11 Capacitor, 0.47F, 250VAC, polyester 21 C13 Capacitor, 100F 22 C14 Capacitor, 100F 23 C15 Capacitor, 820nF 24 RSH Shunt Resistor
Detail DIP-14 DIP-6
Colour burst TV Note 1 Note 1
Note 2 Note 3
Note 1: Resistor (R1 and R2) values are dependant upon the selected value of RSH. Note 2: Capacitor (C15) to be positioned as close to Supply Pins (VDD & VSS) of IC-1 as possible. Note 3: See TYPICAL APPLICATIONS when selecting the value of RSH.
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L O AD
R3 C11* CT RS H
R6
Figure 2: Application Circuit using a Current Transformer for Current Sensing.
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R2 R1 R4
1 2 3 4 5 6 7
I C-1
14 13 12 11 10 9 8
FM DIR
X T AL R7
5V 2.4V T O 2. 6V DC R9 DR-01092 L R8 C10
C9
0V RS H = T E RM I NATI O N RE S I S TO R F O R CURRE NT T RANS F O RM ER R1 = R2
N
SA9602E
S UP P LY
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SA9602E Parts List for Application Circuit: Figure 2 Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Note 1: Note 2: Note 3: Note 4: Symbol IC-1 XTAL RSH R1 R2 R3 R4 R6 R7 R8 R9 C9 C10 C11 CT Description SA9602E Crystal, 3.5795MHz Resistor Resistor, 1%, metal Resistor, 1%, metal Resistor, 390k, (230VAC), 1%, metal Resistor, 1M, 1/4W, 1%, metal Resistor, 24k, 1/4W, metal Resistor, 24k, 1/4W, 1%, metal Resistor, 2.2k, 1/4W, 1%, metal Resistor, 2.2k, 1/4W, 1%, metal Capacitor, 820nF Capacitor, 100nF Capacitor Current transformer Detail DIP-14 Colour burst TV Note 1 Note 2 Note 2
Note 3 Note 4
See TYPICAL APPLICATIONS when selecting the value of RSH. Resistor (R1and R2) values are dependant upon the selected value of RSH. Capacitor (C9) to be positioned as close to Supply Pins (VDD & VSS) of IC-1, as possible. Capacitor (C11) selected to minimize phase error introduced by current transformer (typically 1.5F).
ORDERING INFORMATION Part Number Package SA9602EPA DIP-14 SA9602EPA DIP-20 SA9602ESA SOIC-20
Note:
When ordering, the Package Option should be specified along with the Part Number.
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SA9602E Note:
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SA9602E
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 (Pty) Ltd P O Box 15888, 33 Eland Street, Lynn East, 0039 Koedoespoort Industrial Area, Republic of South Africa, Pretoria, 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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