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参数资料
| 型号： | ADC08038 |
| 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, 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) |
| 中文描述： | 8位高速串行I /办公自动化/ D的多路复用器选项，电压参考，并跟踪转换器/保持功能（8位高速串行输入/输出的A / D转换器带多路选择，电压基准和跟踪/保持功能） |
| 文件页数： | 15/24页 |
| 文件大小： | 552K |
| 代理商： | ADC08038 |
Functional Description
(Continued)
put 0000 0000 digital code for this minimum input voltage by
biasing any V
() input at this V
value. This utilizes
the differential mode operation of the A/D.
The zero error of the A/D converter relates to the location of
the first riser of the transfer function and can be measured by
grounding the V
() input and applying a small magnitude
positive voltage to the V
(+) input. Zero error is the differ-
ence between the actual DC input voltage which is neces-
sary to just cause an output digital code transition from 0000
0000 to 0000 0001 and the ideal
1
2
LSB value (
1
2
LSB =
9.8mV for V
REF
= 5.000V
DC
).
5.2 Full Scale
The full-scale adjustment can be made by applying a differ-
ential input voltage which is 1
1
2
LSB down from the desired
analog full-scale voltage range and then adjusting the mag-
nitude of the V
IN input (or V
for the ADC08032) for a
digital output code which is just changing from 1111 1110 to
1111 1111.
5.3 Adjusting for an Arbitrary Analog Input
Voltage Range
If the analog zero voltage of the A/D is shifted away from
ground (for example, to accommodate an analog input signal
which does not go to ground), this new zero reference
should be properly adjusted first. A V
IN
(+) voltage which
equals this desired zero reference plus
1
2
LSB (where the
LSB is calculated for the desired analog span, using 1 LSB =
analog span/256) is applied to selected “+” input and the
zero reference voltage at the corresponding “” input should
then be adjusted to just obtain the 00
HEX
to 01
HEX
code tran-
sition.
The full-scale adjustment should be made [with the proper
V
() voltage applied] by forcing a voltage to the V
IN
(+) in-
put which is given by:
where:
V
MAX
= the high end of the analog input range
and
V
MIN
= the low end (the offset zero) of the analog range.
(Both are ground referenced.)
The V
IN (or V
) voltage is then adjusted to provide a
code change from FE
HEX
to FF
HEX
. This completes the ad-
justment procedure.
A
www.national.com
15
相关PDF资料 |
PDF描述 |
|---|---|
| ADC08034CIWM | 8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, Voltage Reference, and Track/Hold Function |
| ADC08032 | 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) |
| ADC08032CIWM | 8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, Voltage Reference, and Track/Hold Function |
| ADC08038CIWM | 8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, Voltage Reference, and Track/Hold Function |
| ADC08038CIN | 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 |
|---|---|
| ADC08038BIJ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Single-Ended Data Acquisition System |
| ADC08038CIJ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Single-Ended Data Acquisition System |
| ADC08038CIN | 制造商:Texas Instruments 功能描述: |
| ADC08038CIWM | 功能描述:IC ADC 8BIT HS SERIAL I/O 20SOIC 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:- |
| ADC08038CIWM/NOPB | 制造商:Texas Instruments 功能描述:ADC Single SAR 8-bit Serial 20-Pin SOIC W |
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