MCP3909RD-3PH3 Microchip Technology, MCP3909RD-3PH3 Datasheet

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MCP3909RD-3PH3

Manufacturer Part Number
MCP3909RD-3PH3
Description
REF DESIGN FOR MCP3909 W/18F2520
Manufacturer
Microchip Technology

Specifications of MCP3909RD-3PH3

Main Purpose
Power Management, Energy/Power Meter
Utilized Ic / Part
MCP3909, PIC18F2520, PIC18F4550
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Secondary Attributes
-
Embedded
-
Primary Attributes
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Features
• Supports IEC 62053 International Energy
• Digital waveform data access through SPI
• Dual functionality pins support serial interface
• Two 16-bit second order delta-sigma Analog-to-
• 0.1% typical active energy measurement error
• PGA for small signal inputs supports low value
• Ultra-low drift on-chip reference: 15 ppm/°C (typ.)
• Direct drive for electromagnetic mechanical
• Low I
• Tamper output pin for negative power indication
• Industrial Temperature Range: -40°C to +85°C
Functional Block Diagram
© 2006 Microchip Technology Inc.
Metering Specification and legacy IEC 1036/
61036/687 Specifications
interface
- 16-bit Dual ADC output data words
- 20-bit Multiplier output data word
access and simultaneous Active Power Pulse
Output
Digital Converters (ADCs) with multi-bit DAC
- 81 dB SINAD (typ.) both channels
over 1000:1 dynamic range
shunt current sensor
counter and two-phase stepper motors
REFIN/
CH0+
OUT
CH1+
CH0-
CH1-
Energy Metering IC with SPI Interface and Active Power Pulse Output
DD
OSC1 OSC2
of 4 mA (max.)
Sub-system
Clock
4 kΩ
Reference
G0 G1
+
+
2.4V
PGA
Multi-level
Multi-level
ΔΣ ADC
ΔΣ ADC
16-bit
16-bit
HPF1
HPF1
HPF
16
16
16
16
X
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 at up to 14 kHz with 16-bit ADC output and
20-bit multiplier output words. The 16-bit, delta-sigma
ADCs allow for a wide range of I
and/or small shunt (<200 µOhms) meter designs. A no-
load threshold block prevents any current creep
measurements for the active power pulse outputs. The
integrated on-chip voltage reference has an ultra-low
temperature drift of 15 ppm per degree C.This accurate
energy metering IC with high field reliability is available
in the industry standard 24-lead SSOP pinout.
Package Type
Serial Control
24-Lead
SSOP
And Output
Buffers
20
LPF1
REFIN / OUT
F2 / SCK
MCP3909
MCLR
CH0+
CHO-
CH1+
DV
AV
A
CH1-
HPF
F2/SCK F1/SDI
GND
NC
DD
Active Power
DD
conversion
HF
DTF
Dual Functionality Pin
10
11
12
OUT
1
2
3
4
5
6
7
8
9
Interface
Control
SPI
24
23
22
21
20
19
18
15
17
16
14
13
F0/CS
G0
F1 / SDI
B
F
F
HF
D
NEG / SDO
NC
CLKOUT
CLKIN
G1
F0 / CS
OUT0
OUT1
GND
F
Active Power
Output Drive
and I
OUT
OUT0
Stepper
DS22025A-page 1
NEG/SDO
Motor
for
F
MAX
OUT1
currents
MCLR

Related parts for MCP3909RD-3PH3

MCP3909RD-3PH3 Summary of contents

Page 1

... Multi-level – CH1- ΔΣ ADC Clock Sub-system OSC1 OSC2 © 2006 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 ...

Page 2

... Disabled when F2, F1 (Note 5, Note 6) (Note 2, Note 5) F2, F1 (Note 3) HPF = 1, Gain = 1 (Note 3) Applies to both channels dBFS Full Scale) IN Applies to both channels, MCLK/256 HPF = 0 and 1, < 1 MCLK period (Note 4, Note 6, Note 7) = 2.5V, CH1 = 100 Hz, RMS © 2006 Microchip Technology Inc. ...

Page 3

... Error applies down to 60 degree lead (PF = 0.5 capacitive) and 60 degree lag (PF = 0.5 inductive). 5: Refer to Section 4.0 “Device Overview” for complete description. 6: Specified by characterization, not production tested MCLK period at 3.58 MHz is equivalent to less than <0.005 degrees Hz. © 2006 Microchip Technology Inc 0V, MCLK = 3.58 MHz; T GND GND Min Typ. ...

Page 4

... The MCP3909 operates over this extended temperature range, but with reduced performance. In any case, the Junction Temperature (T DS22025A-page 4 = 4.5V to 5.5V Min Typ Max Units T -40 — +85 ° -40 — +125 ° -65 — +150 ° must not exceed the Absolute Maximum specification of +150° 0V. GND GND Conditions Note © 2006 Microchip Technology Inc. ...

Page 5

... HF pulse time is fixed MCLK periods or 18 µs for MCLK = 3.58 MHz OUT 3: Specified by characterization, not production tested. 4: Serial timings specified and production tested with 180 pF load. © 2006 Microchip Technology Inc. = -40°C to +85°C. A Min Typ Max — ...

Page 6

... DO Hi-z SDO FIGURE 1-2: Serial Interface Timings showing Output, Rise, Hold, and CS Times. DS22025A-page 6 = -40°C to +85°C. A Min Typ Max t — 2 — — 2 — FS2 t CLK 4.5V to 5.5V Units Comment 1 1 When F2, F1 DIS © 2006 Microchip Technology Inc. ...

Page 7

... SPI Data Output Pin FIGURE 1-3: SPI Output Pin Loading Circuit During SPI Testing. © 2006 Microchip Technology Inc – ------------------------------ - 180 -------------- - I OH MCP3909 ) OL DS22025A-page 7 ...

Page 8

... CH0 Vp-p Amplitude (V) Active Power Measurement +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 0.0010 0.0100 0.1000 1.0000 CH0 Vp-p Amplitude (V) Active Power Measurement © 2006 Microchip Technology Inc. ...

Page 9

... Mean = -1.62 mV Std. Dev = 54.6 µV 2000 1500 1000 500 0 -1.77 -1.68 -1.59 Bin (mV) FIGURE 2-9: Channel 0 Offset Error (DC Mode, HPF off 1). © 2006 Microchip Technology Inc 5V 0V GND GND REF at 50 Hz, CH0 amplitude sweeps at 50 Hz. P-P 3000 2500 2000 +85°C 1500 +25° ...

Page 10

... CH0 Vp-p Amplitude (V) Active Power Measurement ( 1). REF +85°C +25°C -40°C 0.0010 0.0100 0.1000 1.0000 CH1 Vp-p Amplitude (V) Active Power Measurement ( 0.5). REF +85°C - 40°C 0.0010 0.0100 0.1000 1.0000 CH0 Vp-p Amplitude (V) Active Power Measurement ( 1). REF © 2006 Microchip Technology Inc. ...

Page 11

... CH1 Vp-p Amplitude (V) FIGURE 2-21: Active Power Measurement Error with External 0.5). REF © 2006 Microchip Technology Inc 5V 0V GND GND REF at 50 Hz, CH0 amplitude sweeps at 50 Hz. P-P 1 0.8 0.6 0.4 0.2 +85° ...

Page 12

... 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. = 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 © 2006 Microchip Technology Inc. ...

Page 13

... HPF controls the state of the high-pass filter in both input channels. A logic ‘1’ enables both filters, removing any DC offset coming from the system or the device. A logic ‘0’ disables both filters allowing DC voltages to be measured. © 2006 Microchip Technology Inc. Table 3-1. Function Digital Power Supply Pin ...

Page 14

... The output state is synchronous with the and rising-edge and H the real power becomes positive again and shows a pulse. and C and and and H are C FC and maintains the logic ‘1’ until OUT OUT © 2006 Microchip Technology Inc. ...

Page 15

... Since this output gives instantaneous real power, the 2ω ripple on the output should be noted. However, the average period will show minimal drift. © 2006 Microchip Technology Inc. ) 3.17 Frequency Output (F GND ...

Page 16

... Section 4.8 “Active Power F put Frequencies”). HPF X LPF HPF Offset INSTANTANEOUS removed by HPF POWER outputs are designed to drive load conditions (see and HF Out- OUT0/1 OUT MCP3909 F OUT0 .. ... F OUT1 HF OUT DTF 0 INSTANTANEOUS REAL POWER © 2006 Microchip Technology Inc. ...

Page 17

... If the voltage at the inputs of the ADC is larger than the specified range, the linearity is no longer specified. However, the converters will continue to © 2006 Microchip Technology Inc. produce output codes until their saturation point is reached. The DC saturation point is around 700 mV for Channel 0 and 1V for Channel 1, using internal voltage reference ...

Page 18

... The magnitude response of this filter is detailed in the instantaneous power signal has harmonic content (coming from the 2ω components of the inputs), and 1 10 100 1000 Frequency (Hz) HPF Magnitude Response Figure 4-5. Due to the fact that © 2006 Microchip Technology Inc. ...

Page 19

... MCLK MCLK © 2006 Microchip Technology Inc. application will then remove the small sinusoidal content of the output frequency and filter out the remaining 2ω ripple intended to be used for calibration purposes OUT due to its instantaneous power content. The shorter integration period of HF component be given more attention ...

Page 20

... HF OUT0/1 OUT and HF ) for each of the F2, F1 and Table 4-2 and Table 4-3); except when will C For additional applications (V = 2.4V) REF HF Frequency (Hz) with OUT full-scale AC Inputs 27.21 27.21 27.21 6070.12 47.42 47.42 47.42 47.42 © 2006 Microchip Technology Inc. is ...

Page 21

... SDO ADCs FIGURE 5-2: Data Access between Data Ready Pulses using SPI Interface for a 3-phase System. © 2006 Microchip Technology Inc. with multiple ADCs, this fast communication is essen- tial to allow for power calculation windows between conversions, as shown in After a serial mode has been entered, all blocks of the MCP3909 device are still operational ...

Page 22

... MCP3909 MCLR t WINSET F2 / SCK SDI FIGURE 5-3: Dual Functionality Pin Serial Mode Entry Protocol. DS22025A-page 22 t WINDOW © 2006 Microchip Technology Inc. ...

Page 23

... The HPF pin controls the state of the HPF for the multiplier mode output and the out- put pulses from the active power block. © 2006 Microchip Technology Inc. the F2, F1, F0 output frequency selection constant can be changed with multiple command bytes for serial mode entry ...

Page 24

... Data is clocked out on the rising edge of SCK. + – CH1 ( CH0 – CH0 – CH1 -------------------------------------------------------------------------------- - 524288 8. REF Decimal +524287 +524286 0 -1 -524287 -524288 D19 D18 D17 D16 SIGN MSB Hi-z – ) • • • Hi LSB © 2006 Microchip Technology Inc. ...

Page 25

... SDI FIGURE 5-5: Dual Channel Output Mode. © 2006 Microchip Technology Inc. A data ready flag (DR) is output for every MCLK / 256 clock cycles and a new filter output value is ready. If the dual channel output values are not clocked, and is not clocked out of the device, they will be over-written. ...

Page 26

... SDO before attempting to clock in data to the device. The user can not access either the multiplier output or the dual channel output while in this mode. . See OUT1 D18 D17 D19 D16 Hi-z D0 © 2006 Microchip Technology Inc. ...

Page 27

... Microchip Technology Inc. 5.7.1 SPI MODE DEFINITIONS 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 ...

Page 28

... X X 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 Don’t Care Bits N = Null Bits © 2006 Microchip Technology Inc. ...

Page 29

... Data is clocked out on rising edges F1 / SDI NEG / SDO D15 MCU Transmit Buffer X MCU Receive Buffer D15 D14 D13 D12 FIGURE 5-8: Dual Channel Output Mode SPI Communication using 8-bit segments (Mode 0,1: SCK idles low). © 2006 Microchip Technology Inc Don’t Care ...

Page 30

... MHz is approximately 3.2 µs, leaving ~125 µs for the power calculations before the next sample is ready. Σ PHA_I_RMS_OFF:16 X Σ X Φ PHA_DELAY:8 PHA_W_GAIN:16 PHA_W_OFF:32 PHA_V_RMS_OFF:16 Σ RMS Current X X Apparent Power PHA_VA_GAIN:16 Active Power RMS Voltage © 2006 Microchip Technology Inc. ...

Page 31

... FIGURE 6-2: Using the PIC device to control the MCP3909 MCLK to achieve 2 cycle, 3-phase sampling shown with 6 ADCs © 2006 Microchip Technology Inc. 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 ...

Page 32

... Power supply design • No-Load threshold • Start-up current • Accuracy Testing Results from MCP390X-based meter • EMC Testing Results from MCP390X-based meter kW kWhr kVAhr A V LCD ... OSC1 OSC2 RX/RC6 RS-232 TX/RC7 Calibration Equipment GND © 2006 Microchip Technology Inc. ...

Page 33

... 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. © 2006 Microchip Technology Inc. MCP3909 Examples: MCP3909 I/SS^^ ...

Page 34

... NOM MAX 24 0.65 BSC. 1.73 1.86 1.99 1.68 1.73 1.78 0.05 0.13 0.21 7.65 7.80 7.90 5.20 5.30 5.38 8.07 8.20 8.33 0.63 0.75 0.95 0.09 0.15 – 0° 4° 8° 0.25 – 0.38 Revised 9-14-05 © 2006 Microchip Technology Inc. ...

Page 35

... APPENDIX A: REVISION HISTORY Revision A (December 2006) • Original Release of this Document. © 2006 Microchip Technology Inc. MCP3909 DS22025A-page 35 ...

Page 36

... MCP3909 NOTES: DS22025A-page 36 © 2006 Microchip Technology Inc. ...

Page 37

... MCP3909: Energy Metering IC MCP3909T: Energy Metering IC (Tape and Reel) Temperature Range -40°C to +85°C Package Plastic Shrink Small Outline (209 mil Body), 24-lead © 2006 Microchip Technology Inc. MCP3909 . Examples: a) MCP3909-I/SS: Energy Metering IC Industrial Temperature, 24LD SSOP. b) MCP3909T-I/SS: Tape and Reel, ...

Page 38

... MCP3909 NOTES: DS22025A-page 38 © 2006 Microchip Technology Inc. ...

Page 39

... Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, 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. ...

Page 40

... Fax: 886-3-572-6459 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 © 2006 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 ...

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