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MCP3909 Fiches technique(PDF) 1 Page - Microchip Technology

No de pièce MCP3909
Description  Energy Metering IC with SPI Interface and Active Power Pulse Output
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Fabricant  MICROCHIP [Microchip Technology]
Site Internet  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP3909 Fiches technique(HTML) 1 Page - Microchip Technology

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© 2006 Microchip Technology Inc.
DS22025A-page 1
MCP3909
Features
• Supports IEC 62053 International Energy
Metering Specification and legacy IEC 1036/
61036/687 Specifications
• Digital waveform data access through SPI
interface
- 16-bit Dual ADC output data words
- 20-bit Multiplier output data word
• Dual functionality pins support serial interface
access and simultaneous Active Power Pulse
Output
• Two 16-bit second order delta-sigma Analog-to-
Digital Converters (ADCs) with multi-bit DAC
- 81 dB SINAD (typ.) both channels
• 0.1% typical active energy measurement error
over 1000:1 dynamic range
• PGA for small signal inputs supports low value
shunt current sensor
• Ultra-low drift on-chip reference: 15 ppm/°C (typ.)
• Direct drive for electromagnetic mechanical
counter and two-phase stepper motors
• Low IDD of 4 mA (max.)
• Tamper output pin for negative power indication
• Industrial Temperature Range: -40°C to +85°C
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 IB and IMAX currents
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
Functional Block Diagram
FOUT0
DGND
NEG / SDO
1
2
3
4
24
23
22
21
20
19
18
17
5
6
7
8
FOUT1
NC
CLKOUT
CLKIN
DVDD
HPF
AVDD
NC
CH0+
CHO-
CH1-
CH1+
HFOUT
16
9
G0
MCLR
15
14
10
11
G1
F0 / CS
REFIN / OUT
AGND
13
12
F1 / SDI
F2 / SCK
24-Lead
SSOP
16-bit
ΔΣ ADC
+
CH0+
CH0-
Reference
2.4V
+
CH1+
CH1-
HPF1
LPF1
DTF
conversion
REFIN/
FOUT1
HFOUT
G0 G1
F2/SCK F1/SDI
FOUT0
OSC1 OSC2
OUT
NEG/SDO
HPF
F0/CS
Multi-level
16-bit
ΔΣ ADC
Multi-level
X
PGA
Serial Control
Buffers
And Output
Stepper
Motor
Output Drive
Active Power
SPI
Interface
Dual Functionality Pin
Control
20
16
16
16
16
MCLR
Sub-system
Clock
for
Active Power
HPF1
4k
Ω
Energy Metering IC with SPI Interface and Active Power Pulse Output


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