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MCP3914 Datasheet(PDF) 1 Page - Microchip Technology

Part # MCP3914
Description  3V Eight-Channel Analog Front End
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP3914 Datasheet(HTML) 1 Page - Microchip Technology

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 2013 Microchip Technology Inc.
DS20005216A-page 1
MCP3914
Features:
• Eight Synchronous Sampling 24-bit Resolution
Delta-Sigma Analog-to-Digital (A/D) Converters
• 94.5 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 Programmable-Gain Amplifier (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 Serial Peripheral Interface
(SPI) 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 40-lead UQFN Package
• Extended Temperature Range: -40°C to +125°C
Applications:
• Polyphase Energy Meters
• Energy Metering and Power Measurement
• Automotive
• Portable Instrumentation
• Medical and Power Monitoring
• Audio/Voice Recognition
Description:
The MCP3914 is a 3V eight-channel Analog Front End
(AFE), containing eight synchronous sampling delta-
sigma, Analog-to-Digital Converters (ADC), eight
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 MCP3914 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 MCP3914 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 MCP3914 is capable of interfacing with a variety of
voltage and current sensors, including shunts, current
transformers, Rogowski coils and Hall-effect sensors.
Package Type
2
35
3
4
5
6
13 14 15 16 17
27
26
25
24
23
38 37 36
34
CH2+
CH4-
CH5+
CH5-
NC
DGND
SDI
SDO
EP
41
7
CH2-
8
CH3-
18 19
28
29
33
SCK
32
CS
OSC2
DR
9
CH3+
22
31
OSC1/CLKI
20
1
10
11 12
CH4+
40 39
DGND
30
21
NC
NC
MCP3914,
5x5 UQFN*
* Includes Exposed Thermal Pad (EP); see Table 3-1.
3V Eight-Channel Analog Front End


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