Техническая Спецификация для Microchip Technology MCP3905RD-PM1

© 2009 Microchip Technology Inc.

DS21948E-page 1

• Supplies active (real) power measurement for 

single-phase, residential energy-metering

• Supports the IEC 62053 International Energy 

Metering Specification and legacy IEC 1036/
61036/687 Specifications

• Two multi-bit, Digital-to-Analog Converters 

(DACs), second-order, 16-bit, Delta-Sigma 
Analog-to-Digital Converters (ADCs)

• 0.1% typical measurement error over 500:1 

dynamic range (MCP3905)

• 0.1% typical measurement error over 1000:1 

dynamic range (MCP3906)

• Programmable Gain Amplifier (PGA) for small-

signal inputs supports low-value shunt current 
sensor

- 16:1 PGA - MCP3905

- 32:1 PGA - MCP3906

• Ultra-low drift on-chip reference: 15 ppm/°C 

(typical)

• Direct drive for electromagnetic mechanical 

counter and two-phase stepper motors

• Low I

DD

 of 4 mA (typical)

• Tamper output pin for negative power indication

• Industrial Temperature Range: -40°C to +85°C

• Supplies instantaneous active (real) power on 

HF

OUT

 for meter calibration

The MCP3905/06 devices are energy-metering ICs
designed to support the IEC 62053 International
Metering Standard Specification. They supply a
frequency output proportional to the average active
(real) power, as well as a higher-frequency output
proportional to the instantaneous power for meter
calibration. They include two 16-bit, delta-sigma ADCs
for a wide range of I

B

 and I

MAX

 currents and/or small

shunt (< 200 µOhms) meter designs. It includes an
ultra-low drift voltage reference with < 15 ppm/°C
through a specially designed band gap temperature
curve for the minimum gradient across the industrial
temperature range. A fixed-function DSP block is
on-chip for active (real) power calculation. Strong
output drive for mechanical counters are on-chip to
reduce field failures and mechanical counter sticking. A
no-load threshold block prevents any current creep
measurements. A Power-On Reset (POR) block
restricts meter performance during low-voltage
situations. These accurate energy-metering ICs with
high field reliability are available in the industry-
standard pinout.

F

OUT0

D

GND

NEG

1

2
3

4

24

23
22

21
20

19
18
17

5

6
7
8

F

OUT1

NC

OSC2
OSC1

DV

DD

HPF

AV

DD

NC

CH0+

CH0-
CH1-

CH1+

HF

OUT

16

9

G0

MCLR

15
14

10
11

G1
F0

REFIN/OUT

A

GND

13

12

F1

F2

16-bit

  

ΔΣ ADC

MCLR

+

–

CH0+

CH0-

Reference

2.4V

+

–

CH1+

CH1-

HPF1

LPF1

E-to-F

conversion

REFIN/

F

OUT1

HF

OUT

G0 G1

F2

F1

F

OUT0

OSC1

OSC2

OUT

NEG

HPF

F0

Multi-level

16-bit

  

ΔΣ ADC

Multi-level

X

HPF1

PGA

POR