參數(shù)資料
型號(hào)： ARD00342
廠商： Microchip Technology
文件頁數(shù)： 1/30頁
文件大?。?/td> 0K
描述： BOARD REF DESIGN MCP3901
設(shè)計(jì)資源： ARD00342 Bill of Materials
ARD00342 Schematic
標(biāo)準(zhǔn)包裝： 1
主要目的： 電源管理，電度表/功率表
嵌入式： 是，MCU，8 位
已用 IC / 零件： MCP3901，PIC18F65J90
主要屬性： 單相分流電度表
次要屬性： USB 接口
已供物品： 板，線纜
2011 Microchip Technology Inc.
DS22192D-page 1
MCP3901
Features
Two Synchronous Sampling 16/24-bit Resolution
Delta-Sigma A/D Converters with Proprietary
Multi-Bit Architecture
91 dB SINAD, -104 dBc Total Harmonic Distortion
(THD) (up to 35th harmonic), 109 dB Spurious-free
Dynamic Range (SFDR) for Each Channel
Programmable Data Rate up to 64 ksps
Ultra Low-Power Shutdown mode with <2 A
-133 dB Crosstalk Between the Two Channels
Low Drift Internal Voltage Reference: 12 ppm/°C
Differential Voltage Reference Input Pins
High Gain PGA on Each Channel (up to 32 V/V)
Phase Delay Compensation Between the Two
Channels with 1 s time Resolution
Separate Modulator Outputs for Each Channel
High-Speed, Addressable 20 MHz SPI Interface
with Mode 0,0 and 1,1 Compatibility
Independent Analog and Digital Power Supplies:
4.5V-5.5V AVDD, 2.7V-5.5V DVDD
Low-Power Consumption: (14 mW typical at 5V)
Available in Small 20-lead SSOP and QFN
Packages
Industrial Temperature Ranges:
- Industrial: -40°C to +85°C
- Extended: -40°C to +125°C
Applications
Energy Metering and Power Measurement
Automotive
Portable Instrumentation
Medical and Power Monitoring
Description
The MCP3901 is a dual channel Analog Front End
(AFE) containing two synchronous sampling Delta-
Sigma Analog-to-Digital Converters (ADC), two PGAs,
phase delay compensation block internal voltage
reference, modulator output block, and high-speed
20 MHz SPI compatible serial interface. The converters
contain a proprietary dithering algorithm for reduced
Idle tones and improved THD.
The internal register map contains 24-bit wide ADC
data words, a modulator output byte, as well as six
writable
control
registers
to
program
gain,
oversampling
ratio,
phase,
resolution,
dithering,
shutdown, Reset and several communication features.
The communication is largely simplified with various
Continuous Read modes that can be accessed by the
Direct Memory Access (DMA) of an MCU and with a
separate data ready pin that can be connected directly
to an Interrupt Request (IRQ) input of an MCU.
The MCP3901 is capable of interfacing to a large
variety of voltage and current sensors, including
shunts, current transformers, Rogowski coils and Hall-
effect sensors.
Package Type
OSC1/CLKI
1
2
3
4
20
19
18
17
16
15
14
13
5
6
7
8
OSC2
SDI
RESET
DVDD
AVDD
CH0+
CH0-
CH1-
12
9
DGND
MDAT0
MDAT1
DR
CH1+
AGND
SDO
11
10
REFIN/OUT+
REFIN-
CS
SCK
20-Lead SSOP
5
2
EP
20
1
19 18 17
3
4
15
14
13
12
678
9
21
10
11
16
CH0+
CH0-
CH1-
CH1+
AGND
REF
IN-
REF
IN/OUT
+
DG
ND
MD
A
T
1
MD
A
T
0
OSC1/CLKI
OSC2
DR
CS
SCK
SDO
SD
I
RES
E
T
DV
DD
AV
DD
20-Lead QFN
* Includes Exposed Thermal Pad (EP); see Table 3-1.
Two-Channel Analog Front End
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