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參數(shù)資料
| 型號(hào)： | MCP3911A0T-E/ML |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 1/17頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AFE 24BIT 125KSPS 2CH 20-QFN |
| 標(biāo)準(zhǔn)包裝： | 3,300 |
| 位數(shù)： | 24 |
| 通道數(shù)： | 2 |
| 電壓 - 電源，模擬： | 2.7 V ~ 3.6 V |
| 電壓 - 電源，數(shù)字： | 2.7 V ~ 3.6 V |
| 封裝/外殼： | 20-VFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 20-QFN（4x4） |
| 包裝： | 帶卷 (TR) |
2012 Microchip Technology Inc.
DS22286A-page 1
MCP3911
Features
Two Synchronous Sampling 16/24-bit Resolution
Delta-Sigma A/D Converters
94.5 dB SINAD, -106.5 dBc Total Harmonic
Distortion (THD) (up to 35th harmonic), 111 dB
SFDR for Each Channel
2.7V - 3.6V AVDD, DVDD
Programmable Data Rate up to 125 ksps
- 4 MHz Maximum Sampling Frequency
Oversampling Ratio up to 4096
Ultra Low Power Shutdown Mode with <2 A
-122 dB Crosstalk between the Two Channels
LowDrift1.2V InternalVoltageReference:7 ppm/°C
Differential Voltage Reference Input Pins
High Gain PGA on Each Channel (up to 32V/V)
Phase Delay Compensation with 1 s Time
Resolution
Separate Modulator Output Pins for Each
Channel
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
Low Power Consumption (8.9 mW at 3.3V,
5.6 mW at 3.3V in low-power mode, typical)
Available in Small 20-lead QFN and SSOP Pack-
ages, Pin-to-pin Compatible with MCP3901
Extended Temperature Range: -40°C to +125°C
Applications
Energy Metering and Power Measurement
Automotive
Portable Instrumentation
Medical and Power Monitoring
Audio/Voice Recognition
Description
The MCP3911 is a 2.7V to 3.6V dual channel Analog
Front End (AFE) containing two synchronous sampling
Delta-Sigma Analog-to-Digital Converters (ADC), two
PGAs, phase delay compensation block, low-drift
internal voltage reference, modulator output block,
digital offset and gain errors calibration registers, and
high-speed 20 MHz SPI compatible serial interface.
The MCP3911 ADCs are fully configurable with fea-
tures such as: 16/24-bit resolution, OSR from 32 to
4096, gain from 1x to 32x, independent shutdown and
reset, dithering and auto-zeroing. The communication
is largely simplified with the one-byte-long commands
including various continuous read/write modes that can
be accessed by the Direct Memory Access (DMA) of an
MCU, and with a separate data ready pin that can be
directly connected to an Interrupt Request (IRQ) input
of an MCU.
The MCP3911 is capable of interfacing 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
SDO
20-Lead
SSOP
20-Lead
QFN
2
CH1-
CH1+
CH0+
SCK
CS
REF
IN+/OUT
OSC2
RE
F
IN-
DG
ND
MD
A
T
1
OSC1/CLKI
AV
D
DVDD
RESET
SDI
CH0-
EP
20
1
19 18 17
3
4
14
13
12
11
678
9
21
5
10
15
16
AGND
MD
A
T
0
DR
3.3V Two-Channel Analog Front End
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