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  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP3919 Datasheet

3V Three-Channel Analog Front End

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MCP3919 pdf
MCP3919
3V Three-Channel Analog Front End
Features:
• Three Synchronous Sampling 24-bit Resolution
Delta-Sigma A/D Converters
• 93.5 dB SINAD, -107 dBc Total Harmonic
Distortion (THD) (up to 35th Harmonic), 112 dBFS
SFDR for Each Channel
• Enables 0.1% Typical Active Power Measurement
Error over a 10,000:1 Dynamic Range
• Advanced Security Features:
- 16-bit Cyclic Redundancy Check (CRC)
Checksum on All Communications for Secure
Data Transfers
- 16-bit CRC Checksum and Interrupt Alert for
Register Map Configuration
- Register Map Lock with 8-bit Secure Key
• 2.7V-3.6V AVDD, DVDD
• Programmable Data Rate up to 125 ksps:
- 4 MHz Maximum Sampling Frequency
- 16 MHz Maximum Master Clock
• Oversampling Ratio up to 4096
• Ultra-Low Power Shutdown Mode with < 10 µA
• -122 dB Crosstalk between Channels
• Low Drift 1.2V Internal Voltage Reference:
9 ppm/°C
• Differential Voltage Reference Input Pins
• High Gain PGA on Each Channel (up to 32 V/V)
• Phase Delay Compensation with 1 µs Time
Resolution
• Separate Data Ready Pin for Easy
Synchronization
• Individual 24-bit Digital Offset and Gain Error
Correction for Each Channel
• High-Speed 20 MHz SPI Interface with Mode 0,0
and 1,1 Compatibility
• Continuous Read/Write Modes for Minimum
Communication Time with Dedicated 16/32-bit
Modes
• Available in a 28-lead 5 x 5 mm QFN and 28-lead
SSOP Packages
• Extended Temperature Range: -40°C to +125°C
Description:
The MCP3919 is a 3V three-channel Analog Front End
(AFE) containing three synchronous sampling delta-
sigma Analog-to-Digital Converters (ADC), three
PGAs, phase delay compensation block, low-drift
internal voltage reference, digital offset and gain error
calibration registers and high-speed 20 MHz
SPI-compatible serial interface.
The MCP3919 ADCs are fully configurable with
features such as: 16/24-bit resolution, Oversampling
Ratio (OSR) from 32 to 4096, gain from 1x to 32x,
independent Shutdown and Reset, dithering and auto-
zeroing. The communication is largely simplified with 8-
bit commands including various continuous read/write
modes and 16/24/32-bit data formats that can be
accessed by the Direct Memory Access (DMA) of an
8/16- or 32-bit MCU and with the separate data ready
pin that can directly be connected to an Interrupt
Request (IRQ) input of an MCU.
The MCP3919 includes advanced security features to
secure the communications and the configuration
settings such as a CRC-16 checksum on both serial
data outputs and static register map configuration. It
also includes a register-map lock through an 8-bit
secure key to stop unwanted write commands from
processing.
The MCP3919 is capable of interfacing with a variety of
voltage and current sensors, including shunts, current
transformers, Rogowski coils and Hall-effect sensors.
Applications:
• Polyphase Energy Meters
• Energy Metering and Power Measurement
• Automotive
• Portable Instrumentation
• Medical and Power Monitoring
• Audio/Voice Recognition
2014 Microchip Technology Inc.
DS20005347A-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

MCP3919 Datasheet

3V Three-Channel Analog Front End

No Preview Available !

MCP3919 pdf
MCP3919
Package Type
MCP3919
SSOP
AVDD
CH0+
CH0-
CH1-
CH1+
CH2+
CH2-
NC
NC
NC
NC
NC
NC
REFIN+/OUT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 DVDD
27 RESET/OSR0
26 SDI/OSR1
25 SDO
24 SCK/MCLK
23 CS/BOOST
22 OSC2/MODE
21 OSC1/CLKI/GAIN0
20 DGND
19 NC
18 DR/GAIN1
17 DGND
16 AGND
15 REFIN-
* Includes Exposed Thermal Pad (EP); see Table 3-1.
Functional Block Diagram
MCP3919
5x5 mm QFN*
CH1- 1
CH1+ 2
CH2+ 3
CH2- 4
NC 5
NC 6
NC 7
28 27 26 25 24 23 22
21 SDI/OSR1
20 SDO
19 SCK/MCLK
EP
29
18 CS/BOOST
17 OSC2/MODE
16 OSC1/CLKI/GAIN0
15 DGND
8 9 10 11 12 13 14
REFIN+/OUT
Voltage
Reference
+
REFIN-
-
VREFEXT
AVDD
Vref
DVDD
CH0+
CH0-
+
-
PGA
Vref- Vref+
OSR/2-
PHASE1 <11:0>
MOD<3:0>
Modulator
Phase
Shifter
CH1+
CH1-
CH2+
CH2-
+
-
PGA
+
-
PGA
OSR/2
MOD<7:4>
Modulator
Phase
Shifter
OSR/2-
PHASE1 <23:12>
MOD<11:8>
Modulator
Phase
Shifter
AMCLK
DMCLK/DRCLK
SINC3+
SINC1
SINC3+
SINC1
SINC3+
SINC1
OFFCAL_CH0
<23:0>
+
Offset
Cal.
OFFCAL_CH1
<23:0>
+
Offset
Cal.
OFFCAL_CH2
<23:0>
Offset
Cal.
GAINCAL_CH0
<23:0>
X
DATA_CH0<23:0>
Gain
Cal.
GAINCAL_CH1
<23:0>
X
Gain
Cal.
DATA_CH1<23:0>
GAINCAL_CH2
<23:0>
X
Gain
Cal.
DATA_CH2<23:0>
Clock
Generation
Xtal Oscillator
OSC1/CLK1/GAIN0
MCLK
OSC2/MODE
DMCLK
OSR<2:0>
PRE<1:0>
Digital SPI
Interface
DR/GAIN1
SDO
RESET/OSR0
SDI/OSR1
SCK/MCLR
CS/BOOST
POR
AVDD
Monitoring
POR
DVDD
Monitoring
ANALOG
AGND
DIGITAL
DGND
DS20005347A-page 2
2014 Microchip Technology Inc.


Part Number MCP3919
Description 3V Three-Channel Analog Front End
Maker Microchip
Total Page 30 Pages
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