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| Programmable Single Phase Energy Metering IC with Tamper Detection SA2007P FEATURES + Provides direct interface to mechanical counters + Calibration and setup stored on external EEPROM - no + + + trimpots required Monitors both Live and Neutral for tamper detection Flexible programmable features Meets the IEC 521/1036 Specification for Class 1 AC Watt hour meters sames + + + + + Total power consumption rating below 50mW Adaptable to different types of sensors Operates over a wide temperature range Precision voltage reference on-chip Precision oscillator on chip DESCRIPTION The SAMES SA2007P is a single phase bi-directional energy metering integrated circuit. It provides a cost effective solution for energy meters with electro-mechanical displays, such as stepper motors and impulse counters. A precision oscillator, that replaces an external crystal is integrated on chip. Two current sensor inputs allow the measurement of energy consumption on both the live and neutral lines. Direction detection of energy flow as well as other common tamper conditions are flagged. The power consumption on both the live and neutral are continuously measured and the larger of the two is selected for energy metering. The SA2007P drives the calibration LED, the indicator LEDs and the electro-mechanical counter directly. The SA2007P does not require any external trim-pots. All required calibration and configuration data is read from a small external EEPROM. The SA2007P integrated circuit is available in 20 pin dual-inline plastic (DIP-20) and small outline (SOIC-20) package types. VDD VSS IIN1 IIP1 IIN2 IIP2 IVP GND ANALOG SIGNAL PROCESSING AND POWER CALCULATION POWER 1 (DIGITAL) ELT POWER 2 (DIGITAL) COMPARATOR SEL1 VOLTAGE REF. OSC IIC BUS INTERFACE POWER TO PULSE RATE DIRO LED MOP MON Dr-01594 VREF TCLK SCL SDA RLOAD TEST Figure 1: Block diagram SPEC-0074 (REV. 2) 1/12 PRELIMINARY 16-01-01 SA2007P ELECTRICAL CHARACTERISTICS (VDD = 2.5V, VSS = -2.5V, over the temperature range -10C to +70C#, unless otherwise specified.) Parameter Operating temp. Range Supply Voltage: Positive Supply Voltage: Negative Supply Current: Positive Supply Current: Negative Current Sensor Inputs (Differential) Input Current Range Voltage Sensor Input (Asymmetrical) Input Current Range Pin VREF Ref. Current Ref. Voltage Digital I/O Pins RLOAD, TCLK, TEST, SEL1, ELT, SDA Input High Voltage Input Low Voltage Pins MOP, MON, LED, SCL, DIRO Output High Voltage Output Low Voltage Pin SDA Pull up current Pins TEST, RLOAD, TCLK Pull down current IIV -IR VR -25 45 1.1 50 1.2 +25 55 1.3 A A V III -25 +25 A Symbol TO VDD VSS IDD ISS Min -25 2.25 -2.75 4.7 4.7 6.6 6.6 Typ Max +85 2.75 -2.25 9.4 9.4 Unit C V V mA mA sames Condition Peak value Peak value With R = 24kW connected to VSS Reference to VSS VIH VIL VOH VOL -IIL VDD-1 VSS+1 V V V V A IOH = -2mA IOL = 5mA VI = VSS VDD-1 VSS+1 54 24 IIH 48 110 A VI = VDD # Extended Operating Temperature Range available on request. ABSOLUTE MAXIMUM RATINGS* Parameter Supply Voltage Current on any pin Storage Temperature Operating Temperature Symbol VDD -VSS IPIN 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. http://www.sames.co.za 2/12 PRELIMINARY SA2007P PIN DESCRIPTION PIN 20 8 Designation GND VDD Description Analog Ground. The voltage to this pin should be mid-way between VDD and VSS. sames Positive supply voltage. The voltage to this pin is typically +2.5V if a shunt resistor is used for current sensing or in the case of a current transformer a +5V supply can be applied. Negative supply voltage. The voltage to this pin is typically -2.5V if a shunt resistor is used for current sensing or in the case of a current transformer a 0V supply can be applied. The current into the A/D converter should be set at 14ARMS at nominal mains voltage. The voltage sense input saturates at an input current of 25A peak. Inputs for current sensor - channel 1 and channel 2. The shunt resistor voltage from each channel is converted to a current of 16ARMS at rated conditions. The current sense input saturates at an input current of 25A peak. This pin provides the connection for the reference current setting resistor. A 24kW resistor connected to VSS sets the optimum operating condition. Serial clock output. This output is used to strobe data from the external EEPROM. Serial data. Send and receive data from an external EEPROM. Motor pulse outputs. These outputs can be used to drive an impulse counter or stepper motor directly. Calibration LED output. Refer to section Led Output (LED) for the pulse rate output options. Configuration reload input. A falling edge will trigger a register reload from the external EEPROM. Current channel select output. This output indicates which channel is been used for kWh metering. Earth loop tamper output. This output indicates an earth loop tamper condition. Direction output. This output indicates the energy flow direction Test input. Connect to VSS for normal operation. 14 VSS 19 IVP 1, 2, 3, 4 IIN1, IIP1 IIN2, IIP2 5 VREF 6 7 9, 12 13 15 16 17 18 SCL SDA MON, MOP LED RLOAD SEL1 ELT DIRO 10, 11 TEST, TCLK ORDERING INFORMATION IIN1 IIP1 IIN2 IIP2 VREF SCL SDA VDD MON TEST 1 2 3 4 5 6 7 8 9 10 20 19 GND IVP Part Number SA2007PPA SA2007PSA Package DIP-20 SOIC-20 18 DIRO 17 ELT 16 15 SEL1 RLOAD 14 VSS 13 12 11 LED MOP TCLK DR-01595 Figure 2: Pin connections: Package: DIP-20, SOIC-20 http://www.sames.co.za 3/12 PRELIMINARY SA2007P FUNCTIONAL DESCRIPTION The SA2007P is a CMOS mixed signal Analog/Digital integrated circuit, which performs power/energy calculations across a power range of 1000:1, to an overall accuracy of better than Class 1. The integrated circuit includes all the required functions for single 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. The SA2007P incorporates an anti-tamper scheme by continuously measuring the power consumption on both LIVE and NEUTRAL lines. A fault is indicated when these measurements differ by more than 12.5%. The SA2007P generates pulses with a frequency proportional to the larger of the two current measurements. The source (LIVE or NEUTRAL) for these pulses is indicated on the SEL1 pin. The metering of energy consumption is taken from the source, which shows the higher consumption. Various pulse outputs (MOP MON and LED) are available. , The pulse rate on these pins follows the active power consumption measured. A low voltage stepper may be driven directly from the device by connecting it between the MOP and MON pins, alternatively an impulse counter may be driven directly by connecting it between MOP and VSS. The SA2007P configures itself from an external low cost EEPROM that contain all meter configurations and calibration data. No external trimming is required for this device. Calibration of the meter may be fully automated. POWER CALCULATION In Figure 7, the voltage drops across the current transformers terminating resistors are converted to currents for each current sense input, by means of resistors R10 and R11 (channel 1) as well as R12 and R13. (channel 2). The current sense input saturates at an input current of 25A peak. The mains voltage (230VAC) is divided down through a divider to 14VRMS. The current into the A/D converter input is set at 14ARMS at nominal mains voltage, via resistor R7 (1MW). See Device Configuration for more details on the processing of measured energy to frequency outputs. GND DR-01288 sames ANALOG INPUT CONFIGURATION The input circuitry of the current and voltage sensor inputs are illustrated in figure 3. 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. AUTOMATIC DEVICE CONFIGURATION (BOOT UP) During power up, registers containing configuration and calibration information are updated from an external EEPROM. The device itself never writes to the EEPROM so any write protect features offered by manufacturer of EEPROM's may be used to protect the configuration and calibration data of the meter. The device reloads its configuration every 1193 seconds from the external EEPROM in order to ensure correct operation of the meter. Every data byte stored in the EEPROM is protected with a checksum byte to ensure data integrity. ELECTROSTATIC DISCHARGE (ESD) PROTECTION The SA2007P integrated circuit's input's/outputs are protected against ESD. POWER CONSUMPTION The power consumption rating of the SA2007P integrated circuit is less than 30mW. V DD IIP CURRENT SENSOR INPUTS VSS VDD AI IIN VSS VDD IVP VOLTAGE SENSOR INPUT V SS AV Figure 3: Analog input internal configuration http://www.sames.co.za 4/12 PRELIMINARY SA2007P INPUT SIGNALS VREF A bias resistor of 24kW set optimum bias and reference conditions on chip. Calibration of the SA2007P should be done as described in the Device Configuration section. sames Selected Input Indicator (SEL1) The SA2007P continuously compares the power consumptions on current channel 1 inputs and current channel 2 inputs. The larger of the two measurements is used for metering. The SEL1 output pin indicates which channel is currently being used for the pulse output. Signal Output SEL 1 Value 0 1 Description Channel 1 selected (IIN1/IIP1) Channel 2 selected (IIN2/IIP2) Serial Data (SDA) The SDA pin connects directly to the SDA pin of an external EEPROM. The pin is used to transfer data between the EEPROM to the SA2007P. An external pull up resistor in not needed. Serial Clock (SCL) The SCL pin connects directly to the SCL pin of an external EEPROM. The SCL output is used to strobe data at a rate of 50kHz out of the EEPROM. An external pull up resistor in not needed. Switching between channels will not be faster than once per second in case both channels are balanced. Earth Loop Tamper Indication (ELT) In case the power measurements from both current channels differ by more than 12.5%, (indicating a earth loop tamper condition), the ELT output is set to zero. The SA2007P continues to generate output pulses from the larger of the two measured powers in this condition. The ELT output is active low. Configuration Reload (RLOAD) A falling edge on the RLOAD pin, will trigger a register update from the external EEPROM. This feature may be used during calibration to load updated register data in the SA2007P. For normal operation of the SA2007P the RLOAD pin may be left floating. Direction Indication (DIRO) The SA2007P provides information about the energy flow direction of both current channels on pin DIRO . A logic 1 on pin DIRO indicates reverse energy flow of both current channels. 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 both current sense input are in phase, is indicated on pin DIRO as a logic 0. The DIRO output will toggle between 1 and 0 a rate of 1Hz in case one of the current channels measure positive energy and the other negative energy. The condition may accure with a improper installed or tampered meter. The DIRO pin may be used to drive a LED in order to indicate reverse energy. Signal Description Output Value 1 DIRO 0 1Hz Reverse energy flow Forward energy flow Out of phase current channels OUTPUT SIGNALS Motor output (MOP, MON) The motor pulse width is programmable for 71ms and 142ms. The MON pulse will follow the MOP pulse within the selected pulse width time. This prevents that the motor armature is in the wrong position after a power failure. Both MOP and MON outputs are active high. One energy pulse is represented by a MOP pulse followed by a MON pulse. The motor drive wave forms are shown in figure 4. LED output (LED) Three options for the LED output pulse rate are available, 6400 and 3200 pulses per kWh, as well as a pulse rate of 1252 pulses per second at rated conditions. At 1252 pulse per second tLED is 71s, for the other options tLED is 10ms. The LED output is active low as in figure 5. An integrated anti-creep function prevents any output pulses if the measured power is less than 0.02% of the meters rated current. VDD MOP VSS VDD MON VSS DR-01559 VDD LED VSS tm tm tm DR-01332 tLED Figure 4: Motor drive on MON and MOP pins http://www.sames.co.za Figure 5: LED pulse output 5/12 PRELIMINARY SA2007P DEVICE CONFIGURATION SIGNAL FLOW DESCRIPTION The following is an overview of the SA2007P's registers. For a detailed description of each parameter please refer to parameter description section. Figure 6 shows the various registers in the SA2007P's power to pulse rate block. The inputs to this block are two single bit pulse density modulated signals, each having a pulse rate of 641454 pulses per second at rated conditions. The parameters Kc1, Kc2, Ne, Cs, Kr, Cres, and Cled contain values which are read from the external EEPROM during power up. The divider registers, Channel 1 Balance and Channel 2 Channel 1 Power 641454p/s sames Balance, are used for calibration and to balance the gain of each channel. The Earth Leakage Compensation register is used to compensate for any permissible earth leakage that may cause the SA2007P to indicate a tamper condition at low current. The Channel Select register selects the source (channel 1 or channel 2) which will be used for the pulse output. Register Rated Condition is used to program the rated condition of the meter and feeds the registers LED-constant and Counter Resolution with the applicable pulse rate. These two registers are programmed to select the LED output rate and the counter resolution (pulses per kWh) respectively. The Counter Pulse Width register is used to program the pulse width for the mechanical counter driver output MOP and MON. Channel 2 Power 641454p/s Channel 1 Balance /Kc1 Channel 2 Balance /Kc2 Earth Leakage Compensation Ne Channel Select (1, 2, auto) Cs Normally 1253p/s Rated Condition /Kr Normally 6400p/kWh Counter Resolution Cres LED-Constant Cled Counter Pulse width CPW MOP MON LED Figure 6: Signal flow block diagram http://www.sames.co.za 6/12 PRELIMINARY SA2007P PARAMETER DESCRIPTION Refer to the EEPROM memory allocation map as well as the Signal flow diagram figure 6, for a description of the registers used in this section. EEPROM Memory Allocation The following table shows the EEPROM memory allocation as well as the corresponding name. The uneven byte always contains the XORed byte of the previous even byte. This is the checksum byte used by the SA2007P to ensure data integrity. Channel Balance (KC) Kc defines the dividing factor, which is applied to the incoming pulse rate. This value is typically 511. This factor is used for calibration and gain balancing of the 2 current channels. The value for Kc is usually between 400 and 640. sames Kc is made up of 2 bytes, D12 and D14 or D16 or D18 which forms a 10 bit value. Rated Condition (KR) Kr is used to program the rated condition of the meter. This feature is required for a correct counter increment of meters designed for different rated conditions using the same integrated circuit. Rated conditions from less than 10A to several 100A are possible. The channel balance values should be used to compensate for rounding errors in Kr. Kr is calculated as follows: Kr =(1252 x 1000 x 3600)/(Rated volt x Rated current x 6400)-1 Kr is made up of 1 byte (D20) Description Channel 1 Balance LSB Channel 1 Balance MSB Channel 2 Balance LSB Channel 2 Balance MSB Rated Condition Led Pulse-rate Counter Pulse-width Counter Resolution Earth leak Compensation Channel Select Mode E2Address 12 13 14 15 16 17 18 19 20 21 22 23 24 24 25 26 26 27 Contents Kc1 XOR of ADDR 12 Kc1 XOR of ADDR 14 Kc2 XOR of ADDR 16 Kc2 XOR of ADDR 18 Kr XOR of ADDR 22 Cled XOR of ADDR 22 Cpw Cres XOR of ADDR 24 Ne Cs XOR of ADDR 24 Bit [7:0] vvvvvvvv xxxxxxxx ------vv xxxxxxxx vvvvvvvv xxxxxxxx ------vv xxxxxxxx vvvvvvvv xxxxxxxx ------vv xxxxxxxx 0v-----------vv 1xxxxxxx ------vv ----vv-xxxxxxxx Name D12 D14 D16 D18 D20 D22 D24 D26 KEY: (- = DON'T CARE); (V = VALUE/PARAMETER); (0,1 = LOGICAL VALUE); (X = BIT-XOR) http://www.sames.co.za 7/12 PRELIMINARY SA2007P LED Pulse-rate (CLED) Two bits of byte D22 allow for the selection of 3 different LED Pulse-rate as follows. D22[1] 0 0 1 D22[0] 0 1 Calibrated LED - Output 6400 p/KWh 3200 p/KWh 1252 pulses/second @rated for fast calibration Refer to LED output section for details on the LED pulse width. 1 Counter Pulse-Width (CPW) The pulse with for the mechanical counter driver output is selectable to accommodate various step-motor and impulsecounter requirements. Bit 6 from byte D24 selects the pulse rate as follows: D24[6] 0 1 Counter Pulse-Width 71ms 142ms 0 1 1 sames Channel Select Mode (CS) For calibration purposes, the source for the energy metering may be selected from a specific channel. The ELT-indication is not influenced, but the metering is taken from the selected channel only. For normal operation, the channel select mode is set to automatic mode so that the larger of the two channels is used for energy measurement. Bits 3 and 2 of byte D26 sets the channel select mode as follows: D26[3] D26[2] 0 Metering Source Automatic, channel 1 or 2 whichever shows higher consumption Channel 1 Channel 2 Earth Leak Compensation (NE) Earth leakage in domestic wiring systems could result in tamper detection at low current levels. The SA2007P caters for these conditions, by taking possible earth leakage into account when comparing the power consumption in live and neutral. The value for the permissible earth leakage is usually around 30mA. It has to be adjusted according to the rated meter condition and allows for derivations from the 30mA value. The actual value of the leak current can be calculated from the following formula: Ileak = Rated current x Ne Counter Resolution (CRES) Bit 1 and 0 from byte D24 allow for the selection of 3 different counter resolutions. Note that one energy pulse is represented by a MOP pulse followed by a MON pulse. D24[1] 0 1 D24[0] 0 0 1 Counter Resolution 1 p/KWh 10 p/KWh 100 p/KWh Ileak is the earth leakage current in mA used for correction. this value is subtracted from the difference measured between live and neutral power. Ne is made up of bits 1 and 2 of byte D26 and can be set as follows: D26[1] 0 0 1 D26[0] 0 1 Ne factor 0.15 0.076 0.038 http://www.sames.co.za 8/12 PRELIMINARY SA2007P TYPICAL APPLICATION The analog (metering) interface described in this section is designed for measuring 230V/60A with precision better than Class 1. The most important external components for the SA2007P integrated circuit are the current sense resistors, the voltage sense resistors and the bias setting resistor. The resistors used in the metering section should be of the same type so temperature effects are minimized. Current Input IIN1, IIP1, IIN2, IIP2 Two current transformers are used to measure the current in the live and neutral phases. The output of the current transformer is terminated with a low impedance resistor. The voltage drop across the termination resistor is converted to a current that is fed to the differential current inputs of the SA2007P. CT Termination Resistor The voltage drop across the CT termination resistor at rated current should be at least 20mV. The CT have low phase shift s and a ratio of 1:2500. The CT is terminated with a 3.6W resistor giving a voltage drop of 86.4mV across the termination resistor at rated conditions (Imax for the meter). Current Sensor Input Resistors The resistors R10, R11 and R12, R13 define the current level into the current sense inputs of the SA2007P. The resistor values are selected for an input current of 16A on the current inputs of the SA2007P at rated conditions. For a 60A meter at 2500:1 CT the resistor values are calculated as follows: R10 = R11 = ( IL / 16A ) x RSH / 2 = 60A / 2500 / 16A x 3.6W / 2 = 2.7kW IL = Line current RSH = CT Termination resistor 2500 = CT ratio The two current channels are identical so R10 = R11 = R12 = R13. Voltage Input IVP The voltage input of the SA2007P (IVP) is driven with a current of 14A at nominal mains voltage. The voltage input saturates sames at approximately 17A. At a nominal voltage current of 14A allows for 20% overdriving. The mains voltage is divided with a voltage divider to 14V that is fed to the voltage input pins via a 1MW resistor. Voltage Divider The voltage divider is calculated for a voltage drop of 14V. Equations for the voltage divider in figure 4 are: RA = R1 + R2 + R3 RB = R7 || R5 Combining the two equations gives: ( RA + RB ) / 230V = RB / 14V Values for resistors R5 = 24kW and R7 = 1MW is chosen. Substituting the values result in: RB = 23.437kW RA = RB x ( 230V / 14V - 1 ) RA = 362kW. Standard resistor values for R1, R2 and R3 are chosen to be 120kW each. The capacitor C1 is used to compensate for phase shift between the voltage sense inputs and the current sense inputs of the device, in cases where CTs with phase errors are used. The phase shift caused by the CT may be corrected by inserting a capacitor in the voltage divider circuit. To compensate for a phase shift of 0.18 degrees the capacitor value is calculated as follows: C = 1 / (2 x p x Mains frequency x R5 x tan (Phase shift angle)) C = 1 / ( 2 x p x 50 x 1MW tan (0.18 degrees )) C = 1.013F Reference Voltage Bias resistor R6 defines all on chip and reference currents. With R6 = 24kW optimum conditions are set. Device calibration is done with calibration data. http://www.sames.co.za 9/10 PRELIMINARY LIVE L R4 T1 TZ1 D1 D3 GND 2 http://www.sames.co.za NEUTRAL 1 U1 Vin Vout 3 VDD R18 C2 GND SA2007P p s + C5 + C6 R19 D2 GND D4 C3 Figure 7: Typical application circuit R5 VSS R1 R2 R3 14V C1 LED2 CT2 R7 R8 R10 R11 CT1 R9 GND R12 R13 R6 VSS GND C4 U2 1 2 3 4 LIVE NEUTRAL VSS A0 VCC A1 TEST A2 SCL VSS SDA 24C01A VSS 8 7 6 5 8 9 10 U3 1 2 3 4 5 6 7 IIN1 IIP1 IIN2 IIP2 VREF SCL SDA VDD MON TEST DR-01596 GND IVP DIRO ELT SEL1 RLOAD VSS LED MOP TCLK 20 19 18 17 16 15 14 13 12 11 VSS CNT1 VSS R14 R15 R16 R17 LED3 LED1 LED4 VSS VDD 10/12 PRELIMINARY 6 5 4 3 2 1 .1 sames sames SA2007P Parts List for Application Circuit: Figure 7 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 41 Symbol U1 U2 D1 D2 D3 D4 LED1 LED2 LED3 LED4 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 C1 C2 C3 C4 C5 C6 CT1 CT2 T1 U1 CNT1 TZ1 Description SA2007P AT24C01, or equivalent device Diode, Silicon 1N4148 Diode, Silicon 1N4148 Diode, Silicon 1N4148 Diode, Silicon 1N4148 Light emitting diode, Green Light emitting diode, Amber Light emitting diode, Red Light emitting diode, Green Resistor, 120k, 1/4W, 1%, metal Resistor, 120k, 1/4W, 1%, metal Resistor, 120k, 1/4W, 1%, metal Resistor, 10W, 2W, Wire wound Resistor, 24k, 1/4W, 1%, metal Resistor, 24k, 1/4W, 1%, metal Resistor, 1M, 1/4W, 1%, metal Resistor, 1/4W, 1%, metal Resistor, 1/4W, 1%, metal Resistor, 1/4W, 1%, metal Resistor, 1/4W, 1%, metal Resistor, 1/4W, 1%, metal Resistor, 1/4W, 1%, metal Resistor, 1k, 1/4W Resistor, 1k, 1/4W Resistor, 1k, 1/4W Resistor, 1k, 1/4W Resistor, 1k, 1/4W, 1%, metal Resistor, 1k, 1/4W, 1%, metal Capacitor Capacitor, 220nF Capacitor, 220nF Capacitor, 820nF Capacitor, 2200F, 25V, electrolytic Capacitor, 100F, 16V, electrolytic Current Transformer Current Transformer Transformer, 230V/9V 78LC05, Voltage regulator Bipolar step motor 400V, Metal oxide varistor sames Detail DIP-20/SOIC-20 or Similar or Similar or Similar or Similar Note 2 Note 2 Note 1 Note 1 Note 1 Note 1 Note 4 Note 3 Note 1: Resistor (R10, R11, R12 and R13) values are dependent upon the selected value of R8 and R9 Note 2: See TYPICAL APPLICATION when selected the value of R8 and R9. Note 3: Capacitor (C4) to be positioned as closed to Supply Pins (VDD & VSS) of U-1, as possible. Note 4: Capacitor (C1) selected to minimize phase error introduced by current transformer (typically 1.5F for normal CTs) http://www.sames.co.za 11/12 PRELIMINARY SA2007P PM9607AP DISCLAIMER: sames 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 P O BOX 15888 33 ELAND STREET LYNN EAST 0039 REPUBLIC OF SOUTH AFRICA 33 ELAND STREET KOEDOESPOORT INDUSTRIAL AREA PRETORIA REPUBLIC OF SOUTH AFRICA http://www.sames.co.za 12/12 |
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