STPM14 STMicroelectronics, STPM14 Datasheet
STPM14
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STPM14 Summary of contents
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... A/D converter blocks, band gap Order code Part number STPM11ATR STPM12ATR STPM13ATR STPM14ATR March 2007 Single phase energy metering IC with pulsed output voltage reference, low drop voltage regulator. The digital part is composed of a system control, oscillator, hard wired DSP and interface for calibration and configuration ...
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Contents 1 Schematic diagram 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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STPM11/12/13/14 7.17 CFGI: Configuration interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ...
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Schematic diagram 1 Schematic diagram Figure 1. Block diagram 4/43 STPM11/12/13/14 ...
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STPM11/12/13/14 2 Pin configuration Figure 2. Pin connections (top view) Table 1. Pin description Pln N° Symbol Type 1 MON MOP SCS OUT DDD 5 V GND SS 6 ...
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Maximum ratings 3 Maximum ratings Table 2. Absolute maximum ratings (See note) Symbol V DC Input voltage CC I Current on any pin (sink/source) PIN Input voltage at digital pins (SCS, MOP, MON, SYN, SDATD SCLNLC, LED) V ...
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STPM11/12/13/14 4 Electrical characteristics Table 4. Electrical characteristics (V =5V 25°C, 2.2µF between between V and V CC Symbol Parameter Energy measurement accuracy f Effective bandwidth BW Error Measurement error SNR Signal to noise ratio ...
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Electrical characteristics Table 4. Electrical characteristics (V =5V 25°C, 2.2µF between between V and V CC Symbol Parameter Current injection latch-up I LATCH immunity Analog Inputs ( IP1 IN1 ...
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STPM11/12/13/14 Table 4. Electrical characteristics (V =5V 25°C, 2.2µF between between V and V CC Symbol Parameter Crystal oscillator (STPM12/14) I Input current on CLKIN I R External resistor P C External capacitors P f ...
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Terminology 5 Terminology 5.1 Measurement error The error associated with the energy measured by STPM1X is defined as: Percentage Error = [STPM1X (reading) - True Energy] / True Energy 5.2 ADC Offset error This is the error due to the ...
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STPM11/12/13/14 6 Typical performance characteristics Figure 3. Supply current vs supply voltage, T =25°C A Figure 5. RC Oscillator: Frequency jitter vs temperature Figure 7. Digital voltage regulator: Line - load regulation Typical performance characteristics Figure 4. RC Oscillator frequency ...
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Typical performance characteristics Figure 9. Power supply AC rejection vs V Figure 11. Error over dynamic range gain dependence Figure 13. Gain response of ∆Σ AD Converters Figure 14. Clock frequency vs external 12/43 Figure 10. Power supply DC rejection ...
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STPM11/12/13/14 7 Theory of operation 7.1 General operation The STPM1X is able to perform active energy measurement (wide band or fundamental) in single-phase energy meter systems. Due to the proprietary energy computation algorithm, STPM1X active energy is not affected by ...
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Theory of operation The Table 7. and Table 7. Configuration of current sensors Current channel Gain Table 8. Configuration of current sensors Primary Gain Sensor 8 16 Rogowsky Coil ...
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STPM11/12/13/14 A ∑ ∆ modulator converts the input signal into a continuous serial stream of 1s and rate determined by the sampling clock. In the STPM1X, the sampling clock is equal to f /4. The 1-bit DAC ...
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Theory of operation The BFR flag is also set if the RMS voltage across V calculated with the following formula − IRMS BFR 6703 (CT/Shunt − IRMS BFR 6687 (Rogowsky) Where K is the ...
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STPM11/12/13/14 Table 10. Nominal voltage values NOM For example 783kΩ and R2 = 475Ω are used as resistor divider when the line voltage is present, the positive voltage present at the input of ...
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Theory of operation Figure 16. Bandgap temperature variation 7.7 Load monitoring The STPM1X include a no-load condition detection circuit with adjustable threshold. This circuit monitors the voltage and the current channels and, when the measured power is below the set ...
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STPM11/12/13/14 7.8 Error detection In addition to the no-load condition and the line frequency band, the integration of power can be suspended also due to detected error on the source signals. There are two kinds of error detection circuits involved. ...
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Theory of operation periods of line voltage when the current of secondary channel is used instead. Four periods before the primary to secondary switching point, a tamper detection module is activated deactivated after eight periods of line have ...
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STPM11/12/13/14 When internal signals are not good enough to perform the computation, i.e. line period is out or range or ∑ ∆ signals from the analog part are stacked at high or low logic level load condition is ...
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Theory of operation Figure 18. Different oscillator circuits (a); (b); (c) STPM12/14 with quartz 7.12 Resetting the STPM1X The STPM1X has no reset pin. The device is automatically reset by the POR circuit when the V crosses the 2.5V value. ...
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STPM11/12/13/14 Table 12. Different settings for led signal KMOT (2 Bits Due to the innovative and proprietary power calculation algorithm, the frequency signal is not affected by any ripple at twice the line frequency. This feature ...
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Theory of operation Figure 19. Positive energy or absolute computation energy (ABS=1) stepper driving signals Figure 20. Negative energy stepper driving signals When a no-load condition is detected MOP and MON are held low. 7.15 Configuring the STPM1X All the ...
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STPM11/12/13/14 The very first CFG bit, called TSTD, is used to disable any change of system signals after it has been permanently set. During the configuration phase, each bit set to logic level 1 increases the supply current of STPM01 ...
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Theory of operation Table 14. Configuration bits map Address N. of Name 6-BIT bits DEC Binary 001010 10 FUND 1 001011 11 ABS 1 001100 12 LTCH 2 (1) 001101 13 001110 14 KMOT 2 (1) 001111 15 010010 18 ...
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STPM11/12/13/14 Table 14. Configuration bits map Address N. of Name 6-BIT bits DEC Binary 100000 32 100001 33 100010 34 100011 35 CHP 8 100100 36 100101 37 100110 38 (1) 100111 39 101000 40 101001 41 101010 42 101011 ...
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Theory of operation 7.16 Mode signals The STPM1X includes four Mode signals. These signals change some of the operation of the STPM1X. The mode signals are not retained when the STPM1X supply is not available and then they are cleared ...
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STPM11/12/13/14 7.17 CFGI: Configuration interface The CFGI interface supports a simple serial protocol, which is implemented in order to enable the configuration of STPM1x which allows writing the Mode bits and the configuration bits (temporarily or permanently); Four pins of ...
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Theory of operation Figure 21. Timing for writing configuration and mode bits → (>30ns): CFGI out of idle state 1 2 → (>30ns): CFGI enabled for write operation data value is placed ...
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STPM11/12/13/14 Permanent writing of the CFG bits In order to make a permanent set of some CFG bits, use the following procedure: 1. collect all addresses of CFG bits to be permanently set into a list; 2. clear all OTP ...
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Energy calculation algorithm 8 Energy calculation algorithm Inside the STPM1X the computing section of the measured active power uses a completely new patented signal process approach. This approach allows the device to reach high performances in terms of accuracy. The ...
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STPM11/12/13/14 ⋅ sin(tω + ϕ); [Eq see (6) in Figure i( can then be used to calculate. These digital signals are also used in two additional steps for integration, obtaining: ⋅ dv/dt → ...
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Energy calculation algorithm [Eq. 10] [ ∫ = ⋅ ′ ′ ′ [Eq. 11] The signals process flow is the same as shown in the previous case, and even with the ...
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STPM11/12/13/14 9 STPM1X Calibration Energy meters based on STPM1X devices are calibrated on the frequency of the output pulse signal. The devices are comprised of two independent meter channels for line voltage and current respectively. Each channel includes its own ...
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STPM1X Calibration Kv=(Cv/128)*0.125 + 0.75 and the same for Ki. Let us choose as initial value Ai=32 Table 18. Value of Calibrator Kp = Kv*Ki = 0.765625 Frequency at LED f = P*In*Vn/3600000 = 40.8889 Hz Voltage divider Sv = ...
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STPM11/12/13/14 10 Schematic Figure 23. Charge pump schematic Schematic 37/43 ...
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Schematic Figure 24. Application schematic 38/43 STPM11/12/13/14 ...
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STPM11/12/13/14 11 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the ...
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Package mechanical data DIM. MIN 0.05 A2 0.8 b 0.19 c 0.09 D 6.4 E 6 0˚ PIN 1 IDENTIFICATION 1 40/43 TSSOP20 MECHANICAL DATA mm. TYP MAX. ...
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STPM11/12/13/14 Tape & Reel TSSOP20 MECHANICAL DATA DIM. MIN 12 6.8 Bo 6.9 Ko 1.7 Po 3.9 P 11.9 mm. TYP MAX. MIN. 330 13.2 0.504 0.795 2.362 22.4 7 0.268 7.1 ...
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Revision history 12 Revision history Table 19. Revision history Date Revision 30-Jan-2007 1 06-Feb-2007 2 20-Mar-2007 3 42/43 Initial release. The Figure 11. has been changed. General description has been updated. STPM11/12/13/14 Changes ...
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... STPM11/12/13/14 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...