MCP3909-I/SS Microchip Technology, MCP3909-I/SS Datasheet
MCP3909-I/SS
Specifications of MCP3909-I/SS
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MCP3909-I/SS Summary of contents
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... Sub-system OSC1 OSC2 © 2009 Microchip Technology Inc. MCP3909 Description The MCP3909 device is an energy-metering IC designed to support the IEC 62053 international metering standard specification. It supplies a frequency output proportional to the average active real power, with simultaneous serial access to ADC channels and multiplier output data. This output waveform data is available kHz with 16-bit ADC output and 20-bit multiplier output words ...
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... MCP3909 NOTES: DS22025B-page 2 © 2009 Microchip Technology Inc. ...
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... F pulse outputs. Valid from Hz. OUT0 OUT1 . Gain = 1, CH0 = 470 mVDC, CH1 = 660 mVDC, difference between REF REF = 100 Hz. DC PSRR: 5V ±500 MCP3909 = DV = 4.5V to 5.5V -40°C to +85°C. A Comment Channel 0 swings 1000:1 range Frequency outputs OUT0 OUT1 only, does not apply to serial interface data ...
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... MCP3909 ELECTRICAL CHARACTERISTICS (CONTINUED) Electrical Specifications: Unless otherwise indicated, all parameters apply at AV Internal V , HPF turned on (AC mode), A REF Parameter Sym ADC/PGA Specifications Offset Error V OS Gain Error Match Internal Voltage Reference Voltage Tolerance Tempco Reference Input Input Range Input Impedance ...
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... Specified Temperature Range Operating Temperature Range Storage Temperature Range Thermal Package Resistances θ Thermal Resistance, 24L-SSOP Note: The MCP3909 operates over this extended temperature range, but with reduced performance. In any case, the Junction Temperature (T © 2009 Microchip Technology Inc. = 4.5V to 5.5V Min Typ ...
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... MCP3909 TIMING CHARACTERISTICS Electrical Specifications: Unless otherwise indicated, all parameters apply 0V, MCLK = 3.58 MHz; T GND GND Parameter Sym Frequency Outputs F and F Pulse Width t OUT0 OUT1 (Logic Low) HF Pulse Width t OUT F and F Pulse Period t OUT0 OUT1 HF Pulse Period t OUT Falling-Edge t OUT0 OUT1 ...
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... Serial Interface Timings showing Output, Rise, Hold, and CS Times. © 2009 Microchip Technology Inc. = -40°C to +85°C. A Min Typ Max — — 150 DIS — — — 2 — — 2 — FS2 t CLK MCP3909 = DV = 4.5V to 5.5V Units Comment 1 1 When F2, F1 DIS DS22025B-page 7 ...
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... MCP3909 SPI Data Output Pin FIGURE 1-3: SPI Output Pin Loading Circuit During SPI Testing. DS22025B-page – ----------------------------------- - 180 ----------------- - I OH © 2009 Microchip Technology Inc. ) ...
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... FIGURE 2-6: Error (Gain = 0.5). MCP3909 = Internal, HPF = 1 (AC mode), +85°C +25°C -40°C 0.0001 0.0010 0.0100 0.1000 CH0 Vp-p Amplitude (V) Active Power Measurement +85°C +25°C -40°C 0.0001 0.0010 ...
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... MCP3909 Note: Unless otherwise specified MCLK = 3.58 MHz, CH1 input = 660 mV 1 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1 0.0001 0.0010 0.0100 0.1000 CH0 Vp-p Amplitude (V) FIGURE 2-7: Active Power Measurement Error (Gain = 1 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0 ...
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... FIGURE 2-18: Error with External V MCP3909 = Internal, HPF = 1 (AC mode), +85°C +25°C - 40°C 0.0010 0.0100 0.1000 1.0000 CH0 Vp-p Amplitude (V) Active Power Measurement ( 1). REF +85°C +25°C -40°C 0.0010 ...
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... MCP3909 Note: Unless otherwise specified MCLK = 3.58 MHz, CH1 input = 660 mV 1 0.8 0.6 0.4 0.2 0 -40°C -0.2 +25°C -0.4 -0.6 -0.8 -1 0.0001 0.0010 0.0100 0.1000 CH1 Vp-p Amplitude (V) FIGURE 2-19: Active Power Measurement Error with External 0.5). REF 1 0.8 ...
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... Distortion Ratio vs. Input Signal Amplitude (G = 16). 0 100 90 -20 80 - -80 40 -100 30 -120 20 10 -140 0 -160 0.1 0 FIGURE 2-28 Input Signal. MCP3909 = Internal, HPF = 1 (AC mode), 100 90 80 SINAD (dBFS SINAD (dB CH0 Vp-p Amplitude (V) Signal-to-Noise and 2000 4000 6000 Frequency (Hz) Frequency Spectrum, DS22025B-page 13 ...
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... MCP3909 NOTES: DS22025B-page 14 © 2009 Microchip Technology Inc. ...
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... Differential Mechanical Counter Logic Output Pin Differential Mechanical Counter Logic Output Pin 3.3 Analog the power supply pin for the analog circuitry DD within the MCP3909. This pin requires appropriate bypass capacitors and should be maintained to 5V ±10% for specified operation. Refer “Applications Information”. ...
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... MCP3909 3.4 Current Channel (CH0-, CH0+) CH0- and CH0+ are the fully differential analog voltage input channels for the current measurement, containing a PGA for small-signal input, such as shunt current sensing. The linear and specified region of this channel is dependant on the PGA gain. This corresponds to a maximum differential voltage of ± ...
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... F0 and F1 pin logic states. These , preferably GND pins include high-output drive capability for direct use of electromechanical counters and 2-phase stepper motors. Since this output supplies average real power, any 2ω ripple on the output pulse period is minimal. MCP3909 ) OUT , F ) OUT0 OUT1 ...
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... MCP3909 NOTES: DS22025B-page 18 © 2009 Microchip Technology Inc. ...
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... DEVICE OVERVIEW The MCP3909 is an energy metering IC that serves two distinct functions that can operate simultaneously: - Active Power Pulse Output - Waveform Output via SPI Interface For the active power output, the device supplies a frequency output proportional to active (real) power, and higher frequency output proportional to the instantaneous power for meter calibration ...
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... Delta-Sigma A/D Converters The ADCs used in the MCP3909 for both current and voltage channel measurements are delta-sigma ADCs. They comprise a second-order, delta-sigma modulator using a multi-bit DAC and a third-order SINC filter. The delta-sigma architecture is very appropriate for the applications targeted by the MCP3909 because ...
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... Section 6.0 “Applications Information”). The threshold voltage is typically set at 4V, with a tolerance of about ±5%. If the supply voltage falls below this threshold, the MCP3909 will be held in a Reset condition (equivalent to applying logic ‘0’ on the MCLR pin). The typical hysteresis value is approximately 200 mV in order to prevent glitches on the power sup- ply ...
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... MCP3909 4.7 Active Power Low-Pass Filter and DTF Converter For the active power signal calculation, the MCP3909 uses a digital low-pass filter. This low-pass filter is a first-order IIR filter, which is used to extract the active real-power information (DC component) from the instantaneous power signal. The magnitude response ...
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... MINIMAL OUTPUT FREQUENCY FOR NO-LOAD THRESHOLD The MCP3909 also includes, on each output frequency, a no-load threshold circuit that will eliminate any creep effects in the meter. The outputs will not OUT show any pulse if the output frequency falls below the no-load threshold ...
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... MCP3909 NOTES: DS22025B-page 24 © 2009 Microchip Technology Inc. ...
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... SERIAL INTERFACE DESCRIPTION 5.1 Dual Functionality Pin And Serial Interface Overview The MCP3909 device contains three serial modes that are accessible by changing the pin functionality of the NEG, F2, F1, and F0 pins to SDO, SCK, SDI and CS, respectively. These modes are entered by giving the MCP3909 device a serial command on these pins during a time window after device reset or POR ...
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... F1 / SDI FIGURE 5-3: Dual Functionality Pin Serial Mode Entry Protocol. 5.2 Serial Mode Entry Codes The MCP3909 devices contains three different serial modes with data presented in 2's complement coding. • Multiplier Output • Dual Channel Output • Filter Input TABLE 5-1: ...
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... Multiplier Output Mode Multiplier mode allows the user to retrieve the output of the multiplier on the MCP3909 device. Data is presented bit (19 bit + sign) protocol, MSB first. A data ready flag (DR) is output for every MCLK/256 Multiplier Code = TABLE 5-2: MULTIPLIER OUTPUT MODE CODING ...
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... MCP3909 5.4 Dual Channel Output Mode This mode allows the user to retrieve the individual channel information from the ADC outputs. The ADC outputs of both channels are synchronized together and their data ready is represented by the data ready pulse on SDO. If the ADC output values are not clocked out of the device, they will be over-written ...
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... Filter Input Mode The filter input mode allows the user to feed the MCP3909 device an input to the LPF1. Data is received MSB first. The MCP3909 will treat this data were the output of the multiplier and will LPF and D-F the result as normal, giving the resulting ...
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... The following table represents the standard SPI mode terminology, the respective PIC bit settings, and a description of compatibility for the MCP3909 device. The MCP3909 works in SPI mode 0,1 mode, that is the data is clocked out of the part on the rising edge and clocked in on the falling edge of SCK. ...
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... D15 D14 D13 D12 D11 D10 D11 D10 D9 D15 D14 D13 D12 Data stored into MCU receive register after transmission of second 8 bits Don’t Care Data stored into MCU receive register after transmission of third 8 bits MCP3909 Don’t Care Bits N = Null Bits DS22025B-page 31 ...
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... MCP3909 MCU latches data from Device on falling edges of SCK F2 / SCK Data is clocked out on rising edges F1 / SDI NEG / SDO MCU Transmit Buffer MCU Receive Buffer MCU latches data from Device on falling edges of SCK F2 / SCK Data is clocked out on rising edges F1 / SDI NEG / SDO ...
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... Performing RMS, Apparent Power, and Active Power using MCP3909 Waveform data Figure 6-1 represents waveform data based on a PIC MCU and MCP3909 device. The PIC MCU accomplishes the following energy meter calculation outputs per phase, per line cycle: - RMS Current - RMS Voltage ...
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... IRQ 16 bits SDO ADCs FIGURE 6-2: Using the PIC device to control the MCP3909 MCLK to achieve 2 cycle, 3-phase sampling shown with 6 ADCs DS22025B-page 34 A simpler lower cost option would be to choose a frequency that would give an integer number of line cycles for exactly 50 Hz (or 60 Hz). This is possible using a 39 ...
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... Power Supply Circuitry FIGURE 6-3: Simplified MCU Based Energy Meter. 6.3 Meter Calibration To achieve meter calibration the MCP3909 waveform samples are adjusted during the power calculations on the PIC MCU. In Figure 6-3, this interface is shown via RS-232 on the PIC microcontroller. This process is streamlined using calibration software available from Microchip’ ...
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... MCP3909 NOTES: DS22025B-page 36 © 2009 Microchip Technology Inc. ...
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... Note: In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. © 2009 Microchip Technology Inc. MCP3909 Examples: MCP3909 I/SS 0951256 ) e 3 ...
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... MCP3909 /HDG 3ODVWLF 6KULQN 6PDOO 2XWOLQH 66 ± 1RWH 1RWHV DS22025B-page 38 PP %RG\ >6623@ I © 2009 Microchip Technology Inc. φ ...
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... APPENDIX A: REVISION HISTORY Revision B (April 2009) The following is the list of modifications: 1. Updated EDS information and Characteristics in Section 1.0 “Electrical Characteristics”. Revision A (December 2006) • Original Release of this Document. © 2009 Microchip Technology Inc. Timing MCP3909 DS22025B-page 39 ...
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... MCP3909 NOTES: DS22025B-page 40 © 2009 Microchip Technology Inc. ...
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... Reel) Temperature Range -40°C to +85°C Package Plastic Shrink Small Outline (209 mil Body), 24-lead © 2009 Microchip Technology Inc. MCP3909 . Examples: a) MCP3909-I/SS: Energy Metering IC Industrial Temperature, 24LD SSOP. b) MCP3909T-I/SS: Tape and Reel, Energy Metering IC Industrial Temperature, 24LD SSOP. DS22025B-page 41 ...
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... MCP3909 NOTES: DS22025B-page 42 © 2009 Microchip Technology Inc. ...
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... PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Total Endurance, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...
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... Fax: 886-3-6578-370 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 © 2009 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 ...