STPM01 PROGRAMMABLE SINGLE PHASE ENERGY METERING IC WITH TAMPER DETECTION PRELIMINARY DATA ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ INTEGRATED LINEAR VREGS TO SUPPLY THE DIGITAL AND ANALOG CORES ADVANCED BICMOS TECHNOLOGY FOR HIGH PERFORMANCE OTP FOR CALIBRATION AND CONFIGURATION INTEGRATED OSCILLATOR WITH EXTERNAL RESISTOR OR CRYSTAL MONITOR BOTH LIVE AND NEUTRAL FOR TAMPER DETECTION SIGMA DELTA 1st ORDER CONVERTER POWER SUPPLY CURRENT LESS THAN 6mA SUPPORT 50 ÷ 60 Hz – IEC 62052-11, IEC 62053-2X SPECIFICATION FOR CLASS 0.5 AC WATT METERS PRECISION VOLTAGE REFERENCE ON CHIP: 1.25 V AND 30 ppm/°C MAX TSSOP20 PACKAGE DESCRIPTION The STPM01 is designed for effective measurement of active energy in a power line system using the Rogowski and/or Shunt principle. This device can be implemented as a single chip 1-phase energy meter or as a peripheral measurement in a microprocessor based 1-phase or 3-phase energy meter. The STPM01 consists, essentially, of two parts: the analog part and the digital part. The former, is composed by preamplifier and 1st order ΣD AD converter blocks, Bandgap voltage reference, Lowdrop voltage regulator and a pair of DC buffer, the latter, is composed by system control, clock generator, hard wired DSP and SPI interface. There is also a OTP block, which is controlled TSSOP through the SPI by means of a dedicated command set. The configured bits are used for testing, configuration and calibration purpose. From a pair of ΣD output signals coming from analog section, a DSP unit computes the amount of consummated active, reactive and apparent energy, RMS values of voltage and current value. The results of computation are available as pulse frequency and states on the digital outputs of the device or as data bits in a data stream, which can be read from the device by means of SPI interface. This system bus interface is used also during production testing of the device and/or for temporary or permanent programming of bits of internal OTP. In the STPM01 the calibration is very easy: an output signal with pulse frequency proportional to energy is generated, this signal is used to enable the calibration of the energy meter. When the device is fully configured and calibrated, a dedicated bit of OTP block, can be written permanently in order to prevent accidental entering into some test mode or changing any configuration. Table 1: Order Codes Type Temperature Range Package Comments STPM01 -40 to 85 °C TSSOP20 (Tape & Reel) 2500 parts per reel September 2004 Rev. 1 1/9 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. STPM01 Figure 1: Pin Configuration Table 2: Pin Description PlN N° SYMBOL 1, 2 MON, MOP 3 SCS 4 VDDD NAME AND FUNCTION Motor pulse outputs. These outputs are used to driver in impulse counter or a stepper motor. They can also be used for reactive energy pulses LED indicator, or for output Σ∆ signal of analog current/voltage channel respectively, or for test mode i/o Σ∆ signal for analog current/ voltage channel respectively Chip select - data transmission enable: a falling edge in this pin places the device in communication mode. Bringing SCS high places the serial bus in high impedance Output of internal LowDrop regulator and power supply for digital core 5 VSS Ground: this pin provides a supply return and analog signal reference level. 6 VCC Positive Power Supply. Typically +5V 7 VOTP Power for programming OTP cells 8 VDDA Output of internal LowDrop regulator and power supply for analog core and OTP cells 9, 10 IIP1, IIN1 Analog input: +and – current (respectively) channel 1 11, 12 IIP2, IIN2 Analog input: +and – current (respectively) channel 2 13, 14 VIP, VIN Analog input: +and – voltage (respectively) intended for use with the voltage transducer 15 SYN 16 CLKIN 17 CLKOUT 18 SCL/NLC 19 SDA/TD 20 LED 2/9 Select data in or data out on SDA or Measurement latching for transmission or output for negative power Input of internal crystal oscillator or input for external measure clock or current setting input for internal RC oscillator Output of internal RC or crystal oscillator Serial clock input for the synchronous serial interface or for No Load Condition Led indicator Serial Data. Send and receiver data synchronous within CLK, or Tamper Detected Led indicator Signal for active energy pulses LED indicator or signal of analog current channel multiplex (available only when used as peripheral and if Σ∆ signal outputs are selected) STPM01 Figure 2: Block Diagram V DDD V CC VSS IIP1 MUX 2:1 IIN1 Digital Processing and Power Calculation 2 x Sigma Delta ADC & Analog Processing IIP2 I IN2 Serial Interface SPI V IP SYN V IN CLKIN CLKOUT O S C I L L A T O R Voltage Reference and Power - on Reset Power to pulse rate 56 bit OTP V DDA V OTP LED Table 3: Absolute Maximum Ratings Symbol Parameter VCC Supply Voltage IPIN Current on any pin TA Operating Temperature Range Value Unit -0.3 to 6 V ± 150 mA -40 to +85 °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Table 4: Electrical Characteristics (Typical values are at TA = 25°C, and VCC = 5V) Symbol Parameter VCC Supply Voltage Positive ICC Supply Current Positive POR Power On Reset on VCC VDDA Analog Supply Voltage VDDD Digital core power supply Test Conditions Min. Typ. 3.165 4MHz, VCC = 5V 8MHz, VCC = 5V F fclk Nominal Line frequency Clock frequency VPRG OTP Programming Level IPRG OTP Programming Current tPRG OTP Programming Time Max. Unit 5.5 V 4 mA 6 2.5 No Calibration V 3 ± 5% V 1.5 ± 5% V 50/60 ± 5% 2 14 10 Hz MHz 20 V 2.5 100 mA 300 µs 3/9 STPM01 Table 5: Analog Inputs Characteristics (IIP1, IIN1, IIP2, IIN2, VIP, VIN TO VSS) (Typical values are at TA = 25°C, and VCC = 5V) Symbol Parameter VMAX Maximum Signal Levels fBAND Bandwidth VOFF Offset Test Conditions Min. Typ. -0.2 Max. Unit 0.2 V 10 KHz ±20 ZIN Impedance of VIP, VIN ZIN Impedance of IIP, IIN GER Gain Error ILEAK Leakage Current 100 400 100 mV KΩ KΩ ±10 % -1 1 µA Table 6: Digital I/O Characteristics (SDA, CLKIN, CLKOUT, SCS, SYN, LED) (Typical values are at TA = 25°C, and VCC = 5V) Symbol Parameter VIH Input High Voltage Test Conditions VIL Input Low Voltage VOH Output High Voltage IO = -2 mA IO = 2 mA VOL Output Low Voltage ILEAK Pull up Current tTR Transition time Min. Typ. Max. Unit 0.75VCC VCC+0.2 V -0.3 0.25VCC V VCC-0.4 V 0.4 15 CL = 50 pF V µA 10 ns Table 7: Power I/O Characteristics (MOP, MON) (VCC = 5V, VSS = GND, TA = -40 to 85°C, unless otherwise specified. Typical values are at TA = 25°C) Symbol Parameter Test Conditions VOH Output High Voltage VOL Output Low Voltage IO = 14 mA tTR Transition time CL = 50 pF IO = -14 mA Min. Typ. Max. VCC-0.5 V 0.5 5 Unit 10 V µs Table 8: Crystal Connection (Typical values are at TA = 25°C, and VCC = 5V) Symbol Parameter Test Conditions VIH(CLKIN) High level input voltage on CLKIN VIL(CLKIN) Low level input voltage on CLKIN II Input current on CLKIN RP External Resistor CP External Capacitors fCLKOUT Nominal frequency ICLKIN Settling current (RC Oscillator) 4/9 Min. Typ. Max. Unit 0.8VDD VDD V 0 0.3VDD V ±1 µA 4 MΩ 1 fCLKOUT = 4 MHz 4 8 40 22 pF 4.194 8.192 MHz 60 µA STPM01 Table 9: On Chip Reference (Typical values are at TA = 25°C, and VCC = 5V) Symbol TC VGB Parameter Temperature Coefficient Test Conditions Min. After Calibration Analog Reference Voltage Typ. Max. Unit 30 50 ppm/°C 1.23±1% V Table 10: SPI Interface Timings (Typical values are at TA = 25°C, and VCC = 5V) Symbol Parameter Test Conditions Min. Typ. Max. Unit FSCLKr Data read speed 32 MHz FSCLKw Data write speed 100 KHz tDS Data setup time 20 ns tDH Data hold time 0 ns tON Data driver on time 20 ns tOFF Data driver off time 20 ns tSYN SYN active width 2/fCLK ns 5/9 STPM01 TSSOP20 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. A MIN. TYP. MAX. 1.2 A1 0.05 A2 0.8 b 0.047 0.15 0.002 0.004 0.006 1.05 0.031 0.039 0.041 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0079 D 6.4 6.5 6.6 0.252 0.256 0.260 E 6.2 6.4 6.6 0.244 0.252 0.260 E1 4.3 4.4 4.48 0.169 0.173 0.176 1 e 0.65 BSC K 0˚ L 0.45 A 0.0256 BSC 0.60 8˚ 0˚ 0.75 0.018 8˚ 0.024 0.030 A2 A1 b K e L E c D E1 PIN 1 IDENTIFICATION 1 0087225C 6/9 STPM01 Tape & Reel TSSOP20 MECHANICAL DATA mm. inch DIM. MIN. A TYP MAX. MIN. 330 MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 TYP. 0.504 22.4 0.519 0.882 Ao 6.8 7 0.268 0.276 Bo 6.9 7.1 0.272 0.280 Ko 1.7 1.9 0.067 0.075 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 7/9 STPM01 Table 11: Revision History 8/9 Date Revision 28-Sep-2004 1 Description of Changes Preliminary Data. STPM01 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. 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