- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄17041 > MCP3425EV (Microchip Technology)EVALUATION BOARD FOR MCP3425 PDF資料下載
參數(shù)資料
| 型號： | MCP3425EV |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 18/38頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVALUATION BOARD FOR MCP3425 |
| 產(chǎn)品培訓(xùn)模塊： | MCP3901 Analog Front End |
| 標(biāo)準(zhǔn)包裝： | 1 |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 15 ~ 240 |
| 數(shù)據(jù)接口： | I²C |
| 輸入范圍： | ±2.048 V |
| 工作溫度： | -40°C ~ 125°C |
| 已用 IC / 零件： | MCP3425 |
| 已供物品： | 板 |
| 產(chǎn)品目錄頁面： | 672 (CN2011-ZH PDF) |
| 相關(guān)產(chǎn)品： | MCP3425A0T-E/CHDKR-ND - IC ADC 16BIT I2C PROGBL SOT23-6 MCP3425A0T-E/CHCT-ND - IC ADC 16BIT I2C PROGBL SOT23-6 MCP3425A0T-E/CHTR-ND - IC ADC 16BIT I2C PROGBL SOT23-6 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當(dāng)前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁
2009 Microchip Technology Inc.
DS22072B-page 25
MCP3425
6.0
BASIC APPLICATION
CONFIGURATIONS AND
EXAMPLES
The MCP3425 can be used for various precision
analog-to-digital converter applications. The device
operates
with
very
simple
connections
to
the
application circuit. The following sections discuss the
examples of the device connections and applications.
6.1
Connecting to the Application
Circuits
6.1.1
BYPASS CAPACITORS ON VDD PIN
For an accurate measurement, the application circuit
needs a clean supply voltage and must block any noise
signal to the MCP3425 device. Figure 6-1 shows an
example of using two bypass capacitors (a 10 F
tantalum capacitor and a 0.1 F ceramic capacitor) on
the VDD line of the MCP3425. These capacitors are
helpful to filter out any high frequency noises on the
VDD line and also provide the momentary bursts of
extra currents when the device needs from the supply.
These capacitors should be placed as close to the VDD
pin as possible (within one inch). If the application
circuit has separate digital and analog power supplies,
the VDD and VSS of the MCP3425 device should reside
on the analog plane.
6.1.2
CONNECTING TO I2C BUS USING
PULL-UP RESISTORS
The SCL and SDA pins of the MCP3425 are open-drain
configurations. These pins require a pull-up resistor as
shown in Figure 6-1. The value of these pull-up
resistors depends on the operating speed and loading
capacitance of the I2C bus line. Higher value of pull-up
resistor consumes less power, but increases the signal
transition time (higher RC time constant) on the bus.
Therefore, it can limit the bus operating speed. The
lower value of resistor, on the other hand, consumes
higher power, but allows higher operating speed. If the
bus line has higher capacitance due to long bus line or
high number of devices connected to the bus, a smaller
pull-up resistor is needed to compensate the long RC
time constant. The pull-up resistor is typically chosen
between 5 k
Ω and 10 kΩ ranges for standard and fast
modes.
FIGURE 6-1:
Typical Connection
Example.
The number of devices connected to the bus is limited
only by the maximum bus capacitance of 400 pF. The
bus loading capacitance affects on the bus operating
speed. Figure 6-2 shows an example of multiple device
connections.
FIGURE 6-2:
Example of Multiple Device
Connection on I2C Bus.
MCP3425
VIN+
VIN-
VDD
VSS
1
2
3
4
5
6
SCL
SDL
Rp
Input Signals
VDD
TO MCU
(MASTER)
RP is the pull-up resistor:
5k
Ω - 10 kΩ for f
SCL
= 100 kHz to 400 kHz
C1: 0.1 F, Ceramic capacitor
C2: 10 F, Tantalum capacitor
Rp
C1
C2
SDA
SCL
Microcontroller
Temperature
(PIC16F876)
MCP3425
MCP4725
Sensor
(MCP9804)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ECE-A1EKG6R8 | CAP ALUM 6.8UF 25V 20% RADIAL |
| EEC22DREN-S93 | CONN EDGECARD 44POS .100 EYELET |
| MCP3424EV | EVALUATION BOARD FOR MCP3424 |
| EVAL-AD7946SDZ | BOARD EVAL FOR AD7946 |
| EEC22DREH-S93 | CONN EDGECARD 44POS .100 EYELET |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCP3426 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:16-Bit, Multi-Channel Analog-to-Digital Converter with I2C Interface and On-Board Reference |
| MCP3426A0-E/MC | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-bit delta-sigma ADC dual chan 15sps RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MCP3426A0-E/MS | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-bit delta-sigma ADC dual chan 15sps RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MCP3426A0-E/SN | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-bit delta-sigma ADC dual chan 15sps RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MCP3426A0-E/SN | 制造商:Microchip Technology Inc 功能描述:A/D (A-D) CONVERTER IC |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。