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| 型号： | MCP3221A7T-E/OT |
| 厂商： | Microchip Technology |
| 文件页数： | 6/28页 |
| 文件大小： | 0K |
| 描述： | ADC 12BIT I2C INTERFACE SOT23-5 |
| 标准包装： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 22.3k |
| 数据接口： | I²C，串行 |
| 转换器数目： | 1 |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 标准包装 |
| 输入数目和类型： | 1 个单端，单极 |
| 其它名称： | MCP3221A7T-E/OTDKR |
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MCP3221
DS21732C-page 14
2006 Microchip Technology Inc.
4.5
Differential Non-Linearity (DNL)
In the ideal A/D converter transfer function, each code
has a uniform width. That is, the difference in analog
input voltage is constant from one code transition point
to the next. Differential nonlinearity (DNL) specifies the
deviation of any code in the transfer function from an
ideal code width of 1 LSB. The DNL is determined by
subtracting the locations of successive code transition
points after compensating for any gain and offset
errors. A positive DNL implies that a code is longer than
the ideal code width, while a negative DNL implies that
a code is shorter than the ideal width.
4.6
Integral Non-Linearity (INL)
Integral nonlinearity (INL) is a result of cumulative DNL
errors and specifies how much the overall transfer
function deviates from a linear response. The method
of measurement used in the MCP3221 A/D converter
to determine INL is the “end-point” method.
4.7
Offset Error
Offset error is defined as a deviation of the code transi-
tion points that are present across all output codes.
This has the effect of shifting the entire A/D transfer
function. The offset error is measured by finding the dif-
ference between the actual location of the first code
transition and the desired location of the first transition.
The ideal location of the first code transition is located
at 1/2 LSB above VSS.
4.8
Gain Error
The gain error determines the amount of deviation from
the ideal slope of the A/D converter transfer function.
Before the gain error is determined, the offset error is
measured and subtracted from the conversion result.
The gain error can then be determined by finding the
location of the last code transition and comparing that
location to the ideal location. The ideal location of the
last code transition is 1.5 LSBs below full-scale or VDD.
4.9
Conversion Current (IDD)
The average amount of current over the time required
to perform a 12-bit conversion.
4.10
Active Bus Current (IDDA)
The average amount of current over the time required
to monitor the I2C bus. Any current the device con-
sumes while it is not being addressed is referred to as
“Active Bus” current.
4.11
Standby Current (IDDS)
The average amount of current required while no con-
version is occurring and while no data is being output
(i.e., SCL and SDA lines are quiet).
4.12
I2C Standard Mode Timing
I2C specification where the frequency of SCL is
100 kHz.
4.13
I2C Fast Mode Timing
I2C specification where the frequency of SCL is
400 kHz.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP3221A7T-I/OT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Low Power 12-Bit A/D Converter With I2C⑩ Interface |
| MCP3221DM-PCTL | 功能描述:数据转换 IC 开发工具 MCP3221 PICtail Demo Board RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| MCP3221-EVM | 制造商:P&S 功能描述:An Evaluation Board, RS232 Serial Cable, and A CD-ROM of Demonstration Program on PC and Related Sources 制造商:P&S 功能描述:An Evaluation Board,RS232 Serial Cable,and A CD-ROM of Demonstration Program on PC and Related Sources |
| MCP3221T | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Low Power 12-Bit A/D Converter With I2C⑩ Interface |
| MCP3301 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Matched Microchannel Plate Set |
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