SA4101A SAMES | Alldatasheet
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Single Phase Kilowatt-hour Metering IC SPEC-1081 (REV. 2) 1/15 29-09-2017 SA4101A
FEATURES
Meets the IEC61036 specification requirements for Class 1 AC static watt-hour meters for active energy Less than 0.5% Error over a dynamic range of 1:500 The motor drive outputs (MOP, MON) provide the average power information and can drive an electro- mechanical counter directly LED pulse output for calibration purposes Bidirectional and unidirectional energy measurement Configurable for different meter ratings Precision on-chip oscillator (70ppm/°C drift) Precision on-chip voltage reference (10ppm/°C drift) On-chip anti-creep function (0.02% of IMAX) Low power consumption (<25mW typical) Measures AC inputs only
DESCRIPTION
The SA4101A is an accurate single phase power/energy metering integrated circuit providing a single-chip solution for energy meters. Very few external components are required and the device has direct drive capability for electro - mechanical counters. The SA4101A does not require an external crystal. A precision oscillator, which supplies the circuitry with a stable frequency, is integrated on chip. The SA4101A metering integrated circuit generates a pulse rate output, the frequency of which is proportional to the power consumption. The SA4101A performs the calculation for active power. The method of calcu lation takes the power factor into account. Programmable inputs allow the meter manufacturer to configure the SA4101A for different meter maximum currents (IMAX) and nominal voltages (VNOM) without having to change the stepper motor or impulse counter g ear ratio. The LED pulse output follows the average power consumption measured and is intended for meter calibration purposes. In fast calibration mode this output provides a high frequency pulse rate following the instantaneous power consumption and can b e used for fast calibration or to interface with a microcontroller. The SA4101A includes an anti-creep feature preventing any creep effects in the meter. The SA4101A can be configured for positive, negative or bidirectional energy measurement. The SA4101A integrated circuit is available in a 20 pin small outline (SOIC20) RoHS compliant package. Figure 1: Block diagram VREF VSS MON MOP MOTOR DRIVE BUFFERS DIVISION FOR COUNTER OUTPUT OSCILLATOR AND TIMING VOLTAGE REFERENCE AND CURRENT BIASING VOLTAGE CHANNEL ADC CURRENT CHANNEL ADC AGND IVP IIN IIP VDD DIGITAL OUTPUT DIGITAL OUTPUT Instantaneous power SIGNAL PROCESSING Average power FASTDIRISO DIVISION FOR CALIBRATION LED OUTPUT LED DIRO INTEGRATION CNF
SPEC-1081 (REV. 2) 2/15 29-09-2017 SA4101A
ELECTRICAL CHARACTERISTICS
(VDD - VSS = 5V ± 10%, over the temperature range -40°C to +85°C, unless otherwise specified. Refer to Figure 2 “Test circuit for electrical characteristics”.) Parameter Symbol Min Typ Max Unit Condition General Supply Voltage: Positive VDD 2.25 2.5 2.75 V With respect to AGND Supply Voltage: Negative VSS -2.75 -2.5 -2.25 V With respect to AGND Supply Current: Positive IDD 2.5 3.6 5.0 mA Supply Current: Negative ISS -2.5 -3.6 -5.0 mA Analog Inputs Current Sensor Inputs (Differential) Input Current Range IRIIP, IRIIN -25 25 μA Peak value Offset Voltage VOIIP, VOIIN -4 4 mV With R = 4.7k connected to AGND Voltage Sensor Inputs (Asymmetrical) Input Current Range IRIVP -25 25 μA Peak value Offset Voltage VOIVP -4 4 mV With R = 4.7k connected to AGND Digital Inputs DIRI Input Leakage IL 1.0 μA Pull-down Current on R2, R1, R0, FAST, CNF, SO IPD 80 140 μA R2, R1, R0, FAST, CNF, SO Input High Voltage Input Low Voltage VIH VIL VDD-1 VSS+1 V V Digital Outputs LED Output Frequency in FAST Mode FMAX 1050 1160 1275 Hz 14μARMS and 16μARMS input current on voltage and current channel respectively LED, DIRO, ACST Output High Voltage Output Low Voltage VOH VOL VDD-1 VSS+1 V V ISOURCE = 5mA ISINK = 5mA MOP, MON Output High Voltage Output Low Voltage VOH VOL VDD-1 VSS+1 V V ISOURCE = 15mA ISINK = 15mA During manufacturing, testing and shipment we take great care to protect our products against potential external environmental damage such as Electrostatic Discharge (ESD). Although our products have ESD protection circuitry, permanent damage may occur on products subjected to high -energy electrostatic discharges accumulated on the human body and/or test equipment that can discharge without detection. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality during product handling. ATTENTION: Electrostatic sensitive device. Requires special handling.
SPEC-1081 (REV. 2) 3/15 29-09-2017 SA4101A ELECTRICAL CHARACTERISTICS (continued) (VDD - VSS = 5V ± 10%, over the temperature range -40°C to +85°C, unless otherwise specified. Refer to Figure 2 “Test circuit for electrical characteristics”.) Parameter Symbol Min Typ Max Unit Condition On-chip Voltage Reference Reference Voltage VR 1.15 1.25 V Reference Current -IR 24.4 25.5 26.6 μA With R = 47k connected to VSS Temperature Coefficient TCR 10 70 ppm/ºC On-chip Oscillator Oscillator Frequency fOSC 3.15 3.57 4.00 MHz Temperature Coefficient TCOSC 70 200 ppm/ºC ABSOLUTE MAXIMUM RATINGS* Parameter Symbol Min Max Unit Supply Voltage VDD - VSS 6 V Current on any Pin IPIN -150 150 mA Storage Temperature TSTG -60 +125 ºC Specified Operating Temperature Range TO -40 +85 ºC Limit Range of Operating Temperature Tlimit -40 +85 ºC *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. Figure 2: Test circuit for electrical characteristics SA4101A R10.1A to 100A 50Hz AC 220V 50Hz AC IIN IIP VREF VSS R0 R1 R2 VSS MON MOP LED VDD VDD R11 R10 GND GND VDD VSS GND R1: 1.2 R2: 1.2 R3: 1.5k R4: 1.5k R5: 1.5k R6: 1.5k R7: 250k R8: 1k R9: 100k R10: 47k R11: 1k CT1: TZ76V (2500:1) P1: 1k C1: 22nF C2: 22nF C3: 5.6nF C4: 220nF C5: 220nF C6: 1µF CT1 2.5V DC 2.5V DC VDD VSS Phase angle between voltage and current -60 to 60 GND IVP N N Single Phase Source AGND R9C3 GND GND FAST CNF DIRO DIRI SO
SPEC-1081 (REV. 2) 4/15 29-09-2017 SA4101A PIN DESCRIPTION Designation Pin No. Description AGND 20 Analog Ground. This is the reference pin for the current and voltage signal sensing networks. The supply voltage to this pin should be mid-way between VDD and VSS. VDD 8 Positive Supply Voltage. The voltage to this pin should be +2.5V ± 10% with respect to AGND. VSS 14 Negative Supply Voltage. The voltage to this pin should be -2.5V ± 10% with respect to AGND. IVP 19 Analog Input for Voltage. The maximum current into the voltage sense input IVP should be set at 16µARMS. The voltage sense input saturates at an input current of ±25µA peak. IIP, IIN 2, 1 Analog Inputs for Current. The maximum current into the current sense inputs IIP/IIN should be set at 16µARMS. The current sense inputs saturate at an input current of ±25µA peak. VREF 3 This pin provides the connection for the reference current setting resistor. A 47k resistor connected to VSS sets the optimum operating conditions. R0, R1, R2 6, 5, 4 Rated Condition Select inputs. These input pins are used for selecting between the different rated condition configurations. Refer to the Rated Condition Select section. FAST 7 Fast Mode Select input. This input is used to select between STANDARD and FAST mode. Refer to the LED Output section. DIRI 18 Direction Select input. This input is used to enable either bidirectional or unidirectional energy measurement. DIRO 17 Direction Indicator output. This output indicates the direction of energy flow. LED 13 Calibration LED output. Refer to the Rated Condition Select section for the pulse rate output options. MON, MOP 15, 12 Motor pulse outputs. These outputs can drive an electro-mechanical counter directly. Refer to the Rated Condition Select section for the pulse rate output options. SO 11 Select Output. When fast mode is selected this input can be used to enable or disable the internal pulse stability circuitry for the LED output pulses. Refer to the Select Output section. CNF 9 Manufacturers test pin. Tie to VSS for optimum protection against transients. NC 10, 16 No connection. Figure 3: Pin connections
ORDERING INFORMATION
SA4101ASAR SOIC20 (RoHS compliant) IIN IIP VREF FAST VDD IVP DIRI DIRO CNF NC NC MON AGND VSS LED MOP SO
SPEC-1081 (REV. 2) 5/15 29-09-2017 SA4101A TERMINOLOGY Bidirectional and Unidirectional Measurement In the bidirectional configuration the LED, MON and MOP outputs generate pulses at a frequency that is proportional to the energy measured in both forward and reverse directions. In the unidirectional configuration the LED, MON and MOP outputs generate pulses at a frequency that is proportional to the energy measured only if the energy flow is in the same direction as selected by the DIRI pin. No output pulses are generated for en ergy flowing counter to the DIRI pin selection. The DIRI pin can select either positive or negative energy flow. Anti-Creep Threshold The anti-creep threshold is defined as the minimum energy threshold below which no energy is registered and therefore no pulses are generated on the LED or motor drive outputs. Positive Energy Positive energy is defined when the phase difference between the input signals IIP and IVP is less than 90 degrees (-90..90 degrees). Negative Energy Negative energy is defined when the phase difference between the input signals IIP and IVP is greater than 90 degrees (90..270 degrees). Percentage Error* Percentage error is given by the following formula: %𝐸𝑟𝑟𝑜𝑟 = 𝐸𝑛𝑒𝑟𝑔𝑦 𝑟𝑒𝑔𝑖𝑠𝑡𝑒𝑟𝑒𝑑 − 𝑇𝑟𝑢𝑒 𝐸𝑛𝑒𝑟𝑔𝑦 𝑇𝑟𝑢𝑒 𝐸𝑛𝑒𝑟𝑔𝑦 × 100 NOTE: Since the true value cannot be determined, it is approximated by a value with a stated uncertainty that can be traced to standards agreed upon between manufacturer and user or to national standards. Rated Operating Conditions* Set of specified measuring ranges for performance characteristics and specified operating ranges for influence quantities, within which the variations or operating errors of a meter are specified and determined. Specified Measuring Range* Set of values of a measured quantity for which the error of a meter is intended to lie within specified limits. Specified Operating Range* A range of values of a single influence quantity, which forms a part of the rated operating conditions. Limit Range of Operation* Extreme conditions which an operating meter can withstand without damage and without degradation of its metrological characteristics when it is subsequently operated under its rated operating conditions. Maximum Rated Mains Current (IMAX) Maximum rated mains curr ent is the specified maximum current flowing through the energy meter at rated operating conditions. Constant* Value expressing the relation between the active energy registered by the meter and the corresponding value of the test output. If this value is a number of pulses, the constant should be either pulses per kilowatt -hour (imp/kWh) or watt - hours per pulse (Wh/imp). Nominal Mains Voltage (VNOM) Nominal mains voltage (VNOM) is the voltage specified for the energy meter at rated operating conditions. Maximum Output Frequency (FMAX) The maximum output frequency (F MAX) is the output frequency in FAST mode when 1 4µARMS and 16µARMS input current with zero phase shift are applied to the voltage and current inputs respectively. Both the voltage and current inputs saturate at an input current magnitude of 25µA, or at 17.68µARMS when using sine waves. The maximum input current on each channel is therefore defined to be 16µA RMS, which leaves about 10% headroom to the saturation point. An additional headroom of 15% is reserved on the voltage channel to account for mains voltage fluctuations. In FAST mode the nominal maximum output frequency of 1160Hz is achieved under such conditions. * IEC 62052-11, 2003. Electricity Metering Equipment (AC) – General Requirements, Test and Test Conditions – Part 11: Metering Equipment
SPEC-1081 (REV. 2) 6/15 29-09-2017 SA4101A PERFORMANCE GRAPHS Figure 4: Test circuit for performance graphs Graph 1: Freq = 50Hz, VMains = VNOM, Temp = 25°C, VDD-VSS = 5.0V Graph 2: PF = 1, Freq = 50Hz, VMains = VNOM, Temp = 25°C SA4101A R10.1A to 100A 50Hz AC 220V 50Hz AC IIN IIP VREF VSS R0 R1 R2 VSS MON MOP LED VDD VDD R11 R10 GND GND VDD VSS GND R1: 1.2 R2: 1.2 R3: 1.5k R4: 1.5k R5: 1.5k R6: 1.5k R7: 250k R8: 1k R9: 100k R10: 47k R11: 1k CT1: TZ76V (2500:1) P1: 1k C1: 22nF C2: 22nF C3: 5.6nF C4: 220nF C5: 220nF C6: 1µF CT1 2.5V DC 2.5V DC VDD VSS Phase angle between voltage and current -60 to 60 GND IVP N N Single Phase Source AGND R9C3 GND GND FAST CNF DIRO DIRI SO -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 0.1 1 10 100 %Error %IMAX PF = 1 PF = 0.5 LAG PF = 0.5 LEAD PF = -1 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 0.1 1 10 100 %Error %IMAX VDD-VSS = 5.0V VDD-VSS = 4.5V VDD-VSS = 5.5V
SPEC-1081 (REV. 2) 7/15 29-09-2017 SA4101A FUNCTIONAL DESCRIPTION Theory of Operation The SA4101A is a CMOS integrated circuit, which performs power/energy calculations across a dynamic range of 500:1 to an accuracy that exceeds the IEC 61036 Class 1 specification. The integrated circuit includes all the required functions for single phase power and energy measurement. Two A/D converters sample the voltage and current inputs. The calculations required for power and energy are performed and pulses on the LED, MON and MOP outputs represent the results. Internal offsets are eliminated through the use of cancellation techniques. The SA4101A generates pulses at a frequency that is proportional to the power consumption. Complimentary output pins MOP and MON are provided for driving a stepper motor. A MOP pulse followed immediately by a MON pulse represents an energy pulse. This minimizes the risk of (after power up) losing the first energy pulse as a result of the stepper motor residing in the wrong phase. The LED output is normally proportional to the average power consumption measured. When in FAST mode, the LED output is proportional to the instantaneous active power consumption. The FAST mode is intended for meter calibration purposes. The two A/D converters convert the signals on the voltage and current sense inputs to a digital format for f urther processing. The current sense inputs (IIP and IIN) are identical and balanced. An input signal with a range of 1:500 is measured at these inputs. An integrated anti-creep function prevents any output pulses if the measured power is less than 0.02% of the meter’s rated current. The two digital signals, accurately representing the current and voltage inputs, are multiplied using digital multiplication. The output of the multiplier is the instantaneous power. For voltage and current in phase instantaneous power is calculated by: 𝑝(𝑡) = 𝑣(𝑡) × 𝑖(𝑡) 𝑝(𝑡) = 𝑉𝑀 cos(𝜔𝑡 + 𝜃) × 𝐼𝑀 cos(𝜔𝑡 + 𝜓) Let 𝜙 = 𝜃 − 𝜓, and 𝑉𝑅𝑀𝑆 = 𝑉𝑀 √2 and 𝐼𝑅𝑀𝑆 = 𝐼𝑀 √2 then 𝑝(𝑡) = 𝑉𝑀 cos(𝜔𝑡 + 𝜃) × 𝐼𝑀 cos(𝜔𝑡 + 𝜃 − 𝜙) 𝑝(𝑡) = 𝑉𝑅𝑀𝑆𝐼𝑅𝑀𝑆(cos 𝜙 + cos(2(𝜔𝑡 + 𝜃) − 𝜙)) where p(t) is the instantaneous power, v(t) is the instantaneous voltage signal, i(t) is the instantaneous current signal, VM is the amplitude of the voltage signal, IM is the amplitude of the current signal, is the phase angle of the voltage signal and is the phase angle of the current signal. This instantaneous power is then integrated over time to provide the average power information: 𝑃 = 1 𝑇 ∫ 𝑝(𝑡)𝑑𝑡 𝑇 𝑃 = 𝑉𝑅𝑀𝑆𝐼𝑅𝑀𝑆 cos 𝜙 where P is the average power and cos is the power factor. Analog Input Configuration The input circuitry of the current and voltage sensor inputs is illustrated in Figure 5. Figure 5: Analog input configuration These inputs are protected against electrostatic discharge through clamping diodes. AI IIN IIP VDD VSS VDD VSS AV IVP VDD VSS AGND VOLTAGE SENSOR INPUT CURRENT SENSOR INPUT CURRENT CHANNEL ADC VOLTAGE CHANNEL ADC
SPEC-1081 (REV. 2) 9/15 29-09-2017 SA4101A Fast Mode Select (FAST) The FAST pin is used to select between STANDARD and FAST mode. Leaving this pin open or connecting to V SS enables the STANDARD mode and connecting to V DD enables FAST mode. When STANDARD mode is enabled the LED output pulses at a low frequency. This low frequency allows a longer accumulation period and the output pulses are therefore proportional to the average power consumption measured. The Rated Select Condition pins (R0, R1 and R2) are used to select differ ent LED output frequencies which in turn selects the applications meter constant. Refer to Figure 9 for the LED output timing diagram in STANDARD mode. When the FAST mode is enabled the LED output generates pulses at a frequency of 1160Hz at I MAX and V NOM. In this mode the pulse frequency is proportional to the instantaneous power consumption measured. This mode is used for meter calibration purposes and can also be used when interfacing to a microcontroller. Refer to Figure 10 for the LED output timing diagram in FAST mode. Select Output (SO) The SA4101A has unique internal circuitry that can be user enabled to stabilize the LED output. When in FAST mode, connecting the SO input pin to VDD will enable the LED pulse stability feature. Stabilizing the LED pulse output allows for shorter meter calibration times. Leaving the SO pin open or connecting to VSS will disable the LED pulse stability circuitry. Figure 10 indicates the operation of pulse stability. Rated Condition Select (R0, R1, R2) The Rated Condition Select pins R0, R1 and R2 are inputs pins used to configure the SA4101A for different Maximum Rated Mains Currents and Nominal Mains Voltages. This feature allows for the use of different stepper motor gear ratios. To calculate the LED output pulse rate (in STANDARD mode) and motor drive pulse rate for any meter ratings (I MAX and VNOM) the following formulae can be used: 𝐿𝐸𝐷 𝑖𝑚𝑝/𝑘𝑊ℎ = 1160 𝐷𝐹_𝐿𝐸𝐷 × 1000 × 3600 𝑉𝑁𝑂𝑀 × 𝐼𝑀𝐴𝑋 ...(1) where IMAX is the maximum rated mains current, VNOM is the nominal mains voltage and DF_LED is the dividing factor for the LED output that depends on R2, R1 and R0 as specified in Table 1. Equation 1 is based on the assumption that the input current into the IIP/IIN current sense input is set to 16μARMS at IMAX. Table 1: LED output constants R2 R1 R0 DF_LED VSS VSS VSS 322 VSS VSS VDD 322 VSS VDD VSS 322 VSS VDD VDD 322 VDD VSS VSS 225 VDD VSS VDD 214 VDD VDD VSS 214 𝑀𝑜𝑡𝑜𝑟 𝑖𝑚𝑝/𝑘𝑊ℎ = 𝐿𝐸𝐷 𝑖𝑚𝑝/𝑘𝑊ℎ 𝐷𝐹_𝑀𝑂 …(2) where LED imp/kWh is the LED constant as calculated using Equation 1 and DF_MO is the dividing factor for the motor output that depends on R1 and R0 as specified in Table 2. Table 2: MOTOR output constants R1 R0 DF_MO VSS VSS 8 VSS VDD 32 VDD VSS 16 VDD VDD 8 Table 3 shows some of the meter constants available for several maximum currents (I MAX) and with a line voltage of 220V while in STANDARD mode. Note that the values calculated using Equations 1 and 2 are close approximations to the values listed in Table 3. The SA4101A has to be calibrated (using the voltage input) to give the exact value listed. Table 3: Examples of various meter constants R2 R1 R0 VNOM/IMAX LED Output Motor Outputs VSS VSS VDD 220V / 20A 3200 100 VSS VDD VSS 220V / 40A 1600 100 VSS VDD VDD 220V / 80A 800 100 VDD VSS VSS 220V / 100A 800 100 VDD VSS VDD 220V / 30A 3200 100 VDD VDD VSS 220V / 60A 1600 100
SPEC-1081 (REV. 2) 11/15 29-09-2017 SA4101A TYPICAL APPLICATION The following description outlines the basic process required to design a typical single phase energy meter using the SA4101A and a shunt resistor as a current sensing element. The meter is capable of measuring 220V/40A/50Hz with a precision better than Class 1. It uses a stepper motor counter with 100imp/kWh and the calibration LED has a constant of 1600imp/kWh. The most important external circuits required for the SA4101A are the current input network, the voltage input network as well as the bias resistor. All resistors should be 1% metal film resistors of the same type to minimize temperature effects. Bias Resistor A bias resistor of R10 = 47k sets optimum bias and reference currents on chip. Calibration of the meter should be done using the voltage input and not by means of the bias resistor. Current Input Network The voltage drop across the shunt resistor at maximum rated current should not be less than 5mV RMS and not exceed 100mVRMS. A 320μ shunt is chosen which sets the voltage drop at maximum rated current to 12.8mV and the maximum power dissipation in the shunt to 0.5W. The voltage across the shunt resistor is converted to the required d ifferential input currents through the current input resistors. Anti -alias filters are incorporated on these input resistors to filter any high frequency signal components that could affect the performance of the SA4101A. The four current input resistors (R1, R2, R3, R4) should be of equal size to optimize the input networks low pass filtering characteristics, so the values can be calculated as follows: 𝑅1 = 𝑅2 = 𝑅3 = 𝑅4 = 𝐼𝑀𝐴𝑋 × 𝑅𝑆𝐻 4 × 16𝜇𝐴 = 200Ω = 𝑅𝐶 For optimum performance the cut -off frequency of th e anti- alias filter should be between 10kHz and 20kHz. The equivalent resistance associated with each capacitor is R C/2 so the capacitor values should be in the order of 𝐶1 = 𝐶2 = 1 𝜋𝑓𝐶𝐼𝑅𝐶 = 1 𝜋 × 15𝑘𝐻𝑧 × 200Ω ≈ 100𝑛𝐹 = 𝐶𝐶 where fCI is the cut-off frequency of the anti -alias filter of the current input network. Voltage Input Network The voltage sense input requires an input current of 14μARMS at VNOM (220V). The mains voltage is divided by means of a voltage divider to a lower vol tage that is converted to the required input current by means of the input resistor. Once again an anti -alias filter is required to remove any high frequency signals that could affect the performance of the SA4101A. A shunt typically has very little phase shift so phase compensation is not required. The input resistor R8 sets the current input into the device. This resistor should not be too large else the capacitor for the anti-alias filter will be quite small which could cause inaccurate phase shift due to parasitic capacitances. Therefore R8 = 100k is chosen and the voltage at the centre of the trimpot should be 1.4V (14μA x 100k). The calibration range of the voltage input network should be about ±15% to ensure that all component tolerances can be cat ered for, so the total tuning range can be set to ±0. 22V. Therefore the voltage across the trimpot and R9 is 1. 62V. Choosing a 1k trimpot results in 𝑅9 = 1𝑘Ω The effect of R8 can be ignored in the above equation, given the fact that R8 is significantly larger than P1 and R9. Now let RA = R5 + R6 + R7 and 1.62𝑉 − 1) ≈ 499𝑘Ω so choose R5 = R6 = 200kand R7 = 100k. The cut-off frequency of the anti-alias filter is adjusted so that it is identical to that of the current input network anti -alias filters. This ensures that the phase shift caused by the anti - alias filters is identical on the current and voltage input networks. Therefore 𝜋𝐶𝐶 × 𝑅𝐶 = 1 2𝜋(𝑃1 + 𝑅9) × 𝐶3 and so C3 = 2.7nF.
SPEC-1081 (REV. 2) 12/15 29-09-2017 SA4101A PROGRAMMING The resistor values are calculated for a 40A rated meter. The LED pulse rate must be set accordingly by programming pins R0, R1 and R2. Using the Rated Conditions Select section, pins R0 and R2 is set to VSS and R1 set to VDD. These settings will configure the SA4101A for 220V/40A operation with a LED pulse rate of 1600 pulses/kWh. The FAST pin is set to VSS for STANDARD operation. Figure 11: Typical application circuit Table 4: Component list for typical application Symbol Description U1 Energy metering device, SA4101ASAR U2 Opto-coupler, 1N35 RSH Shunt Resistor, 40A, 320μ R1, R21, R3, R41 Resistor, 200, 1%, metal film R5, R6 Resistor, 200k, 1%, metal film R7, R81 Resistor, 100k, 1%, metal film R9 Resistor, 2.7k, 1%, metal film R101 Resistor, 47k, 1%, metal film R11 Resistor, 680, 5%, carbon film Symbol Description R12, R13 Resistor, 100, 5%, carbon film R14 Resistor, 1k, 5%, carbon film P1 Trim-pot, 25 turns, 1k C1, C2 Capacitor, 100nF, ceramic C3 Capacitor, 2.7nF, ceramic C42, C52 Capacitor, 220nF, ceramic C62 Capacitor, 1μF, ceramic D1 Light emitting diode, pulse output D2 Light emitting diode, direction output CNT1 Stepper motor counter, 100imp/kWh Note 1: Resistors R2, R4, R8 and R10 must be positioned as close as possible to the respective device pins Note 2: Capacitors C4, C5 and C6 must be positioned as close as possible to the VDD and VSS power supply pins VDD VSS VREF IIP IIN LED MON MOP IVP AGND R3 R4 R1 R2 200 200 200 200 C1 100nF 100nF R10 47k-2.5V +2.5V 200k 200k 100k 100k P1 1k R9 2.7k R13 100 R12 100 CNT1 7 6 5 4 3 2 . 1 Pulse +2.5V R11 680 Pulse Out 4N35 LIVE IN NEUTRAL LIVE OUT 2.7nF 220nF 220nF 1µF +2.5V -2.5V RSH 320µ 0V DIRO
17 R14
1k Direction +2.5V SO FAST -2.5V +2.5V CNF DIRI -2.5V
SPEC-1081 (REV. 2) 13/15 29-09-2017 SA4101A PACKAGE DIMENSIONS
SPEC-1081 (REV. 2) 14/15 29-09-2017 SA4101A NOTES
SPEC-1081 (REV. 2) 15/15 29-09-2017 SA4101A DISCLAIMER The information contained in this document is confidential and proprietary to Integrated Circuit Design Centre (Pty) Ltd ("ICDC"), a division of 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 ICDC. 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. ICDC does not undertake to inform any recipient of this document of any changes in the information contained herein, and ICDC expressly reserves the right to make changes in such information, without notification, even if such changes would render information contained herein inaccurate or incomplete. ICDC makes no representatio n 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 sent to our support e-mail address: support@sames.co.za For the latest updates on datasheets, please visit our web site: http://www.sames.co.za. INTEGRATED CIRCUIT DESIGN CENTRE (PTY) LTD a division of SOUTH AFRICAN MICRO-ELECTRONIC SYSTEMS (PTY) LTD Tel: 012 333 6021 Tel Int: 00 27 12 333 6021 Fax: 012 333 6393 Fax Int: 00 27 12 333 6393 PO BOX 15888 LYNN EAST 0039 REPUBLIC OF SOUTH AFRICA UNIT 4, PERSEQUOR CLOSE
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