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参数资料
| 型号： | ADC0817 |
| 厂商： | National Semiconductor Corporation |
| 元件分类： | 串行ADC |
| 英文描述： | 8-BitμP Compatible A/D Converters with 16-Channel Multiplexer(带16通道多路器的8位μP兼容A/D转换器) |
| 中文描述： | 8BitμP兼容的A / D转换器的16通道多路复用器（带16通道多路器的8位微处理器兼容的A / D转换器） |
| 文件页数： | 7/13页 |
| 文件大小： | 245K |
| 代理商： | ADC0817 |
Timing Diagram
(Continued)
The successive approximation register (SAR) performs 8 it-
erations to approximate the input voltage. For any SAR type
converter, n-iterations are required for an n-bit converter.
Figure 2 shows a typical example of a 3-bit converter. In the
ADC0816, ADC0817, the approximation technique is ex-
tended to 8 bits using the 256R network.
The A/D converter’s successive approximation register
(SAR) is reset on the positive edge of the start conversion
(SC) pulse. The conversion is begun on the falling edge of
the start conversion pulse.Aconversion in process will be in-
terrupted by receipt of a new start conversion pulse. Con-
tinuous conversion may be accomplished by tying the
end-of-conversion (EOC) output to the SC input. If used in
this mode, an external start conversion pulse should be ap-
plied after power up. End-of-conversion will go low between
0 and 8 clock pulses after the rising edge of start conversion.
The most important section of the A/D converter is the com-
parator. It is this section which is responsible for the ulimate
accuracy of the entire converter. It is also the comparator
drift which has the greatest influence on the repeatability of
the device. A chopper-stabilized comparator provides the
most effective method of satisfying all the converter require-
ments.
The chopper-stabilized comparator converts the DC input
signal into an AC signal. This signal is then fed through a
high gain AC amplifier and has the DC level restored. This
technique limits the drift component of the amplifier since the
drift is a DC component which is not passed by the AC am-
plifier. This makes the entire A/D converter extremely insen-
sitive to temperature, long term drift and input offset errors.
Figure 4 shows a typical error curve for the ADC0816 as
measured using the procedures outlined in AN-179.
www.national.com
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相关PDF资料 |
PDF描述 |
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| ADC0816CCJ | 8-Bit レP Compatible A/D Converters with 16-Channel Multiplexer |
| ADC0816CCN | 8-Bit レP Compatible A/D Converters with 16-Channel Multiplexer |
| ADC0817CCN | 8-Bit レP Compatible A/D Converters with 16-Channel Multiplexer |
| ADC0819BCN | 8-Bit Serial I/O A/D Converter with 19-Channel Multiplexer |
| ADC0819BCV | 8-Bit Serial I/O A/D Converter with 19-Channel Multiplexer |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADC0817CCN | 功能描述:模数转换器 - ADC 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 |
| ADC0817CCN | 制造商:Texas Instruments 功能描述:DATA ACQUISITION UNIT DIP40 817 |
| ADC0817CCN/A+ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog-to-Digital Converter， 8-Bit |
| ADC0817CCN/NOPB | 功能描述:模数转换器 - ADC 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 |
| ADC0819 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:8-Bit Serial I/O A/D Converter with 19-Channel Multiplexer |
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