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参数资料
| 型号： | ADC08031 |
| 厂商： | National Semiconductor Corporation |
| 元件分类： | 串行ADC |
| 英文描述： | 8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, <BR> Voltage Reference, and Track/Hold Function |
| 中文描述： | 8位高速串行I /办公自动化/ D转换器多路选择， \u003cBR\u003e电压基准和采样/保持功能 |
| 文件页数： | 13/24页 |
| 文件大小： | 509K |
| 代理商： | ADC08031 |
Functional Description
(Continued)
3.0 REFERENCE CONSIDERATIONS
The voltage applied to the reference input on these convert-
ers, V
IN, defines the voltage span of the analog input
(the difference between V
and V
over which the
256 possible output codes apply. The devices can be used
either in ratiometric applications or in systems requiring ab-
solute accuracy. The reference pin must be connected to a
voltage source capable of driving the reference input resis-
tance which can be as low as 1.3k
. This pin is the top of a
resistor divider string and capacitor array used for the suc-
cessive approximation conversion.
In a ratiometric system the analog input voltage is propor-
tional to the voltage used for the A/D reference. This voltage
is typically the system power supply, so the V
IN pin can
be tied to V
. This technique relaxes the stability require-
ments of the system reference as the analog input and A/D
reference move together maintaining the same output code
for a given input condition.
For absolute accuracy, where the analog input varies be-
tween very specific voltage limits, the reference pin can be
biased with a time and temperature stable voltage source.
For the ADC08034 and the ADC08038 a band-gap derived
reference voltage of 2.6V (Note 8) is tied to V
REF
OUT. This
can be tied back to V
IN. Bypassing V
OUT with a
100μF capacitor is recommended. The LM385 and LM336
reference diodes are good low current devices to use with
these converters.
The maximum value of the reference is limited to the V
supply voltage. The minimum value, however, can be quite
small (see Typical Performance Characteristics) to allow di-
rect conversions of transducer outputs providing less than a
5V output span. Particular care must be taken with regard to
noise pickup, circuit layout and system error voltage sources
when operating with a reduced span due to the increased
sensitivity of the converter (1 LSB equals V
REF/
256).
8 Single-Ended
DS010555-48
8 Pseudo-Differential
DS010555-49
4 Differential
DS010555-50
Mixed Mode
DS010555-51
FIGURE 1. Analog Input Multiplexer Options for the ADC08038
www.national.com
13
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PDF描述 |
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| ADC08031CIN | 8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, <BR> Voltage Reference, and Track/Hold Function |
| ADC08031CIWM | 8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, Voltage Reference, and Track/Hold Function |
| ADC08034 | 8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, Voltage Reference, and Track/Hold Function(8位高速串行输入/输出A/D转换器带多路选择，电压基准和跟踪/保持功能) |
| ADC08038 | 8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, Voltage Reference, and Track/Hold Function(8位高速串行输入/输出A/D转换器带多路选择，电压基准和跟踪/保持功能) |
| ADC08034CIWM | 8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, Voltage Reference, and Track/Hold Function |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADC08031BIJ | 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 |
| ADC0803-1CD | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:CMOS 8-bit A/D converters |
| ADC08031CIJ | 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 |
| ADC08031CIN | 制造商:NSC 制造商全称:National Semiconductor 功能描述:8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, Voltage Reference, and Track/Hold Function |
| ADC08031CIWM | 功能描述:IC ADC 8BIT HS SERIAL I/O 14SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:12 采样率（每秒）:3M 数据接口:- 转换器数目:- 功率耗散（最大）:- 电压电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-23-6 包装:带卷 (TR) 输入数目和类型:- |
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