MCP3905/06 Energy-Metering ICs with Active (Real) Power Pulse Output Features Description The MCP3905/06 devices are energy-metering ICs Supplies active (real) power measurement for designed to support the IEC 62053 International single-phase, residential energy-metering Metering Standard Specification. They supply a Supports the IEC 62053 International Energy frequency output proportional to the average active Metering Specification and legacy IEC (real) power, as well as a higher-frequency output 1036/61036/687 Specifications proportional to the instantaneous power for meter Two multi-bit, Digital-to-Analog Converters calibration. They include two 16-bit, delta-sigma ADCs (DACs), second-order, 16-bit, Delta-Sigma for a wide range of I and I currents and/or small B MAX Analog-to-Digital Converters (ADCs) shunt (< 200 Ohms) meter designs. It includes an 0.1% typical measurement error over 500:1 ultra-low drift voltage reference with <15ppm/C dynamic range (MCP3905) through a specially designed band gap temperature 0.1% typical measurement error over 1000:1 curve for the minimum gradient across the industrial dynamic range (MCP3906) temperature range. A fixed-function DSP block is on- chip for active (real) power calculation. Strong output Programmable Gain Amplifier (PGA) for small- signal inputs supports low-value shunt current drive for mechanical counters are on-chip to reduce field failures and mechanical counter sticking. A no- sensor load threshold block prevents any current creep mea- - 16:1 PGA - MCP3905 surements. A Power-On Reset (POR) block restricts - 32:1 PGA - MCP3906 meter performance during low-voltage situations. Ultra-low drift on-chip reference: 15 ppm/C (typ.) These accurate energy-metering ICs with high field Direct drive for electromagnetic mechanical reliability are available in the industry-standard pinout. counter and two-phase stepper motors Package Type Low I of 4 mA (typ.) DD DV 1 24 F DD OUT0 Tamper output pin for negative power indication 24-Pin SSOP HPF 2 23 F OUT1 Industrial Temperature Range: -40C to +85C AV 3 22 HF DD OUT Supplies instantaneous active (real) power on NC 4 21 D GND CH0+ 5 20 NEG HF for meter calibration OUT CH0- 6 19 NC CH1- 7 18 OSC2 CH1+ 8 17 OSC1 US Patents Pending MCLR 9 16 G0 REFIN/OUT 10 15 G1 A 11 14 F0 GND F2 12 13 F1 Functional Block Diagram G0 G1 HPF OSC1 OSC2 HF OUT F CH0+ + 16-bit OUT0 PGA F Multi-level HPF1 F2 F1 F0 OUT1 NEG CH0- ADC REFIN/ E-to-F OUT LPF1 X conversion 2.4V Reference CH1+ + 16-bit POR Multi-level HPF1 CH1- ADC MCLR 2007 Microchip Technology Inc. DS21948D-page 1MCP3905/06 Notice: Stresses above those listed underMaximum 1.0 ELECTRICAL Rating may cause permanent damage to the device. This is CHARACTERISTICS a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operation listings of this specification is not implied. Exposure Absolute Maximum Ratings to maximum rating conditions for extended periods may affect V ...................................................................................7.0V device reliability. DD Digital inputs and outputs w.r.t. A ........ -0.6V to V +0.6V GND DD Analog input w.r.t. A .........................................-6V to +6V GND V input w.r.t. A ............................... -0.6V to V +0.6V REF GND DD Storage temperature .....................................-65C to +150C Ambient temp. with power applied ................-65C to +125C Soldering temperature of leads (10 seconds) .............+300C ESD on the analog inputs (HBM,MM) .................5.0 kV, 500V ESD on all other pins (HBM,MM) ........................5.0 kV, 500V ELECTRICAL CHARACTERISTICS Electrical Specifications: Unless otherwise indicated, all parameters apply at AV = DV = 4.5V 5.5V, DD DD Internal V , HPF turned on (AC mode), A , D = 0V, MCLK = 3.58 MHz T = -40C to +85C. REF GND GND A Parameter Sym Min Typ. Max Units Comment Overall Measurement Accuracy Channel 0 swings 1:500 range, Energy Measurement Error E 0.1 % F OUT MCP3905 only (Note 1, Note 4) 0.1 % F Channel 0 swings 1:1000 range, OUT MCP3906 only (Note 1, Note 4) No-Load Threshold/ NLT 0.0015 % F Disabled when F2, F1, F0 = 0, 1, 1 OUT Minimum Load Max (Note 5, Note 6) Phase Delay Between 1/MCLK s HPF = 0 and 1, < 1 MCLK Channels (Note 4, Note 6, Note 7) AC Power Supply F2, F1, F0 = 0, 1, 1 (Note 3) AC PSRR 0.01 % F OUT Rejection Ratio (Output Frequency Variation) DC Power Supply DC PSRR 0.01 % F HPF = 1, Gain = 1 (Note 3) OUT Rejection Ratio (Output Frequency Variation) System Gain Error 3 10 % F Note 2, Note 5 OUT ADC/PGA Specifications Offset Error V 2 5 mV Referred to Input OS Gain Error Match 0.5 % F Note 8 OUT Internal Voltage Reference Voltage 2.4 V Tolerance 2 % Tempco 15 ppm/C Note 1: Measurement error = (Energy Measured By Device - True Energy)/True Energy * 100%. Accuracy is measured with signal (660 mV) on Channel 1. F , F pulse outputs. Valid from 45 Hz to 65 Hz. OUT0 OUT1 See Section 2.0 Typical Performance Curves for higher frequencies and increased dynamic range. 2: Does not include internal V . Gain = 1, CH0 = 470 mVDC, CH1 = 660 mVDC, difference between REF measured output frequency and expected transfer function. 3: Percent of HF output frequency variation Includes external V = 2.5V, CH1 = 100 mVRMS OUT REF 50 Hz, CH2 = 100 mVRMS 50 Hz, AV = 5V + 1V 100 Hz. DC PSRR: 5V 500 mV. DD pp 4: Error applies down to 60 lead (PF = 0.5 capacitive) and 60 lag (PF = 0.5 inductive). 5: Refer to Section 4.0 Device Overview for complete description. 6: Specified by characterization, not production tested. 7: 1 MCLK period at 3.58 MHz is equivalent to less than <0.005 degrees at 50 or 60 Hz. 8: Gain error match is measured from CH0 G = 1 to any other gain setting. DS21948D-page 2 2007 Microchip Technology Inc.