- 您现在的位置：买卖IC网 > PDF目录2097 > MCP3208T-BI/SL (Microchip Technology)IC ADC 12BIT 2.7V 8CH SPI 16SOIC PDF资料下载
参数资料
| 型号： | MCP3208T-BI/SL |
| 厂商： | Microchip Technology |
| 文件页数： | 15/40页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 2.7V 8CH SPI 16SOIC |
| 标准包装： | 2,600 |
| 位数： | 12 |
| 采样率（每秒）： | 100k |
| 数据接口： | 串行，SPI? |
| 转换器数目： | 1 |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 8 个单端，单极；4 个伪差分，单极 |
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页当前第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
MCP3204/3208
DS21298E-page 22
2008 Microchip Technology Inc.
FIGURE 6-2:
SPI Communication using 8-bit segments (Mode 1,1: SCLK idles high).
6.2
Maintaining Minimum Clock Speed
When the MCP3204/3208 initiates the sample period,
charge is stored on the sample capacitor. When the
sample period is complete, the device converts one bit
for each clock that is received. It is important for the
user to note that a slow clock rate will allow charge to
bleed off the sample capacitor while the conversion is
taking place. At 85°C (worst case condition), the part
will maintain proper charge on the sample capacitor for
at least 1.2 ms after the sample period has ended. This
means that the time between the end of the sample
period and the time that all 12 data bits have been
clocked out must not exceed 1.2 ms (effective clock
frequency of 10 kHz). Failure to meet this criterion may
introduce linearity errors into the conversion outside
the rated specifications. It should be noted that during
the entire conversion cycle, the A/D converter does not
require a constant clock speed or duty cycle, as long as
all timing specifications are met.
6.3
Buffering/Filtering the Analog
Inputs
If the signal source for the A/D converter is not a low
impedance source, it will have to be buffered or inaccu-
rate conversion results may occur (see Figure 4-2). It is
also recommended that a filter be used to eliminate any
signals that may be aliased back into the conversion
results, as is illustrated in Figure 6-3, where an op amp
is used to drive the analog input of the MCP3204/3208.
This amplifier provides a low impedance source for the
converter input, and a low pass filter, which eliminates
unwanted high frequency noise.
Low-pass (anti-aliasing) filters can be designed using
Microchip’s free interactive FilterLab software. Filter-
Lab will calculate capacitor and resistor values, as well
as determine the number of poles that are required for
the application. For more information on filtering
signals, see AN699, “Anti-Aliasing Analog Filters for
Data Acquisition Systems”
.
12
3
4
5
6
7
8
9
10 11 12 13 14 15
16
CS
SCLK
DIN
X = “Don’t Care” Bits
17 18 19 20 21 22 23 24
DOUT
DO
Don’t Care
NULL
BIT B11 B10 B9
B8
B6 B5 B4 B3 B2 B1 B0
HI-Z
000
00
1
XX
XXX
DO
SGL/
DIFF
XX
XXX
B7 B6 B5 B4 B3 B2 B1 B0
B11 B10 B9 B8
0
????
???
?
??
?
MCU latches data from A/D converter
on rising edges of SCLK
Data is clocked out of A/D
converter on falling edges
D1
D2
SGL/
DIFF
Start
Bit
(Null)
D1
D2
Start
MCU Transmitted Data
(Aligned with falling
edge of clock)
MCU Received Data
(Aligned with rising
edge of clock)
B7
X
Data stored into MCU receive
register after transmission of first
8 bits
Data stored into MCU receive
register after transmission of
second 8 bits
Data stored into MCU receive
register after transmission of last
8 bits
DO
相关PDF资料 |
PDF描述 |
|---|---|
| MCP3221A5T-E/OT | IC ADC 12BIT 2.7V 1CH LP SOT23-5 |
| MCP3302-BI/SL | IC ADC 13BIT 2.7V 2CH SPI 14SOIC |
| MCP3421A0T-E/CH | IC ADC 18BIT 3.75SPS 1CH SOT23-6 |
| MCP3421A0T-E/OT | IC ADC 18BIT 3.75SPS 1CH SOT23-6 |
| MCP3424T-E/ST | IC ADC 18BIT 3.75SPS 4CH 14TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP3208T-CI/P | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI⑩ Serial Interface |
| MCP3208T-CI/SL | 功能描述:模数转换器 - ADC 12-bit SPI 8 Chl 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 |
| MCP3208T-CI/ST | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI⑩ Serial Interface |
| MCP320B2 | 功能描述:音频指示器及警报器 55DB 3-20V MINILERT RoHS:否 制造商:PUI Audio 产品:Indicators 声压级:85 dB 音调:Continuous 频率:2300 Hz +/- 300 Hz 电压额定值:5 VDC 电流额定值:30 mA 端接类型: 直径:12 mm 安装:Through Hole |
| MCP320B2Q | 功能描述:音频指示器及警报器 CONSTANT, 3-20VDC 2.5KHZ, LOUD, 23MM D RoHS:否 制造商:PUI Audio 产品:Indicators 声压级:85 dB 音调:Continuous 频率:2300 Hz +/- 300 Hz 电压额定值:5 VDC 电流额定值:30 mA 端接类型: 直径:12 mm 安装:Through Hole |
发布紧急采购，3分钟左右您将得到回复。