Microchip MCP39F521 Bruksanvisning
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MCP39F521
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2015 Microchip Technology Inc. DS20005442A-page 1
MCP39F521
Features
• Power Monitoring Accuracy Capable of 0.1%
Error Across 4000:1 Dynamic Range
• Built-In Calculations on Fast 16-bit Processing
Core
- Active, Reactive, Apparent Power
- True Root Mean Square (RMS) Current,
RMS Voltage
- Line Frequency, Power Factor
• 64-bit Wide Import and Export Active Energy
Accumulation Registers
• 64-bit Four Quadrant Reactive Energy
Accumulation Registers
• Signed Active and Reactive Power Outputs
• Dedicated Zero Crossing Detection (ZCD) Pin
Output with Less than 100 µs Latency
• Automatic Event Pin Control through Fast Voltage
Surge Detection, Less than 5 ms Delay
• I2C Interface, up to 400 kHz Clock Rate
• Two Independent Registers for Minimum and
Maximum Output Quantity Tracking
• Fast Calibration Routines and Simplified
Command Protocol
• 512 Bytes User-Accessible EEPROM through
Page Read/Write Commands
• Low-Drift Internal Voltage Reference,
10 ppm/°C Typical
• 28-lead 5 x 5 mm QFN Package
• Extended Temperature Range -40°C to +125°C
Applications
• Power Monitoring for Home Automation
• Industrial Lighting Power Monitoring
• Real-Time Measurement of Input Power for
AC/DC Supplies
• Intelligent Power Distribution Units
Description
The MCP39F521 is a highly integrated, complete
single-phase power-monitoring device, designed for
real-time measurement of input power for AC/DC
power supplies, power distribution units, consumer and
industrial applications. It includes dual-channel
delta-sigma ADCs, a 16-bit calculation engine,
EEPROM and a flexible two-wire I2C interface.
An integrated low-drift voltage reference with
10 ppm/°C in addition to 94.5 dB of signal-to-noise and
distortion ratio (SINAD) performance on each
measurement channel allows for better than 0.1%
accurate designs across a 4000:1 dynamic range.
Package Types
1
25
2
3
4
5
8 9 10 11 12
20
18
17
28 27 26 24
EVENT
NC
COMMONB
COMMONA
NC
NC
NC
AVDD
A0
RESET
DVDD
DGND
MCLR
EP
29
6
7
OSCI
OSCO
13 14
SCL
SDA
16
15
23 22
REFIN+/OUT
ZCD
I1+
I1-
V1-
V1+
AN_IN
AGND
DGND
A1
DR
MCP39F521
5x5 QFN*
*Includes Exposed Thermal Pad (EP); see Table 3-1.
19
21
I2C Power Monitor with Calculation and Energy Accumulation
MCP39F521
DS20005442A-page 2 2015 Microchip Technology Inc.
Functional Block Diagram
24-bit Delta-Sigma
Multi-Level
+
-
SINC3
Digital Filter
Modulator ADC
PGA
I1+
I1-
24-bit Delta-Sigma
Multi-Level
+
-
SINC3
Digital Filter
Modulator ADC
PGA
V1+
V1-
16-BIT
CORE
Calculation
Engine
(CE) Digital Outputs
I2C
Serial
Interface SCL
SDA
EVENT
FLASH
10-bit SAR
ADC
AN_IN
OSCI
OSCO
Timing
Generation
Internal
Oscillator
Generation
AVDD AGND DVDD DGND
ZCD
A0
A1
2015 Microchip Technology Inc. DS20005442A-page 3
MCP39F521
MCP39F521 Typical Application – Single-Phase, Two-Wire Application Schematic
DGND
OSCO
OSCI
DVDD RESET
AVDD
I1+
I1-
V1-
V1+
NC
NC
NC
REFIN/OUT+
AGND
COMMONA,B
NC
LOAD
+3.3V
NL
MCP1754
+3.3V
AGND
DGND
+
-
33 nF
33 nF
33 nF
1 k
1 k
1 k
499 k
1 k
4 MHz
22 pF 22 pF
33 nF
0.01 µF
0.47 µ F 470
470 µF
10
1 µF 0.1 µF 0.1 µF
0.1 µF
AN_IN
2 m
Leave Floating
N.C.
MCP9700A
(OPTIONAL)
+3.3V
to MCU SCL
SDA
SCL
DR (OPTIONAL)
Connect on PCB
EVENT
ZCD
MCP39F521
499 k
to MCU SDA
A1
A0
To DVDD or GND, do not float
IsolationIsolation
Note: The external sensing components shown here, a 2 mΩ shunt, two 499 kΩ and 1 kΩ resistors for the
1000:1 voltage divider, are specifically chosen to match the default values for the calibration registers
defined in Section 6.0, Register Descriptions. By choosing low-tolerance components of these
values (e.g. 1% tolerance), measurement accuracy in the 2-3% range can be achieved with zero
calibration. See Section 8.0, MCP39F521 Calibration for more information.
To DVDD or GND, do not float
3.3 DVDD
2 k
3.3 DVDD
2 k
Produktspecifikationer
| Varumärke: | Microchip |
| Kategori: | Inte kategoriserad |
| Modell: | MCP39F521 |
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