- 您现在的位置：买卖IC网 > PDF目录17041 > MCP3424EV (Microchip Technology)EVALUATION BOARD FOR MCP3424 PDF资料下载
参数资料
| 型号： | MCP3424EV |
| 厂商： | Microchip Technology |
| 文件页数： | 25/58页 |
| 文件大小： | 0K |
| 描述： | EVALUATION BOARD FOR MCP3424 |
| 产品培训模块： | MCP3901 Analog Front End |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 18 |
| 采样率（每秒）： | 3.75 ~ 240 |
| 数据接口： | I²C |
| 输入范围： | ±2.048 V |
| 在以下条件下的电源（标准）： | 135µA @ 240sps |
| 工作温度： | -55°C ~ 125°C |
| 已用 IC / 零件： | MCP3424 |
| 已供物品： | 板 |
| 产品目录页面： | 672 (CN2011-ZH PDF) |
| 相关产品： | MCP3424T-E/STTR-ND - IC ADC 18BIT 3.75SPS 4CH 14TSSOP MCP3424T-E/SLTR-ND - IC ADC 18BIT 3.75SPS 4CH 14-SOIC MCP3424-E/ST-ND - IC ADC 18BIT 3.75SPS 4CH 14TSSOP MCP3424-E/SL-ND - IC ADC 18BIT 3.75SPS 4CH 14-SOIC |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页当前第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页
2009 Microchip Technology Inc.
DS22088C-page 31
MCP3422/3/4
6.0
BASIC APPLICATION
CONFIGURATION
The MCP3422/3/4 devices can be used for various
precision
analog-to-digital
converter
applications.
These devices operate 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 MCP3422/3/4 devices. 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 MCP3424. 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 MCP3422/3/4 devices should
reside on the analog plane.
6.1.2
CONNECTING TO I2C BUS USING
PULL-UP RESISTORS
The SCL and SDA pins of the MCP3422/3/4 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
(standard,
fast,
and
high
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, and less than 1 k
Ω for high speed mode
depending on the presence of bus loading capacitance.
6.1.3
I2C ADDRESS SELECTION PINS
(MCP3423 AND MCP3424)
The user can tie the Adr0 and Adr1 pins to VSS, VDD,
or left floating. See more details in Section 5.3.2
FIGURE 6-1:
Typical Connection.
Figure 6-2 shows an example of multiple device
connections.
The
I2C
bus
loading
capacitance
increases as the number of device connected to the I2C
bus line increases. The bus loading capacitance affects
on the bus operating speed. For example, the highest
bus operating speed for the 400 pF bus capacitance is
1.7 MHz, and 3.4 MHz for 100 pF. Therefore, the user
needs to consider the relationship between the
maximum operation speed versus. the number of I2C
devices that are connected to the I2C bus line.
FIGURE 6-2:
Example of Multiple Device
Connection on I2C Bus.
RP
VDD
4
5
6
9
CH2-
VSS
CH3+
Adr1
Adr0
3
12
CH2+
CH3-
2
13
CH1-
CH4+
1
14
CH1+
CH4-
7
8
SDA
SCL
VDD
11
10
C1
C2
Input
Signal 2
Signal 1
Input
Signal 4
Signal 3
TO MCU
(MASTER)
RP
I2C Address
Selection
Pins
Rp is the pull-up resistor:
5k
Ω - 10 kΩ for f
SCL
= 100 kHz to 400 kHz
~700
Ω for f
SCL
= 3.45 MHz
C1: 0.1 F, Ceramic capacitor
C2: 10 F, Tantalum capacitor
MCP3424
SDA SCL
Microcontroller
(PIC16F876)
MCP4725
MCP3422
MCP3423
MCP3424
相关PDF资料 |
PDF描述 |
|---|---|
| EVAL-AD7946SDZ | BOARD EVAL FOR AD7946 |
| EEC22DREH-S93 | CONN EDGECARD 44POS .100 EYELET |
| GMC08DRTF-S13 | CONN EDGECARD 16POS .100 EXTEND |
| MCP3421EV | BOARD EVAL FOR MCP3421 SOT23-6 |
| GEC44DRES-S13 | CONN EDGECARD 88POS .100 EXTEND |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP3424T-E/MC | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:18-Bit, Multi-Channel ???￡ Analog-to-Digital Converter with I2Ca?￠ Interface and On-Board Reference |
| MCP3424T-E/MF | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:18-Bit, Multi-Channel ???￡ Analog-to-Digital Converter with I2Ca?￠ Interface and On-Board Reference |
| MCP3424T-E/MS | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:18-Bit, Multi-Channel ???￡ Analog-to-Digital Converter with I2Ca?￠ Interface and On-Board Reference |
| MCP3424T-E/SL | 功能描述:模数转换器 - ADC 18B delta-sigma ADC dual Ch 4sps RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MCP3424T-E/SN | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:18-Bit, Multi-Channel ???￡ Analog-to-Digital Converter with I2Ca?￠ Interface and On-Board Reference |
发布紧急采购，3分钟左右您将得到回复。