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参数资料
| 型号： | ADC0805 |
| 厂商： | National Semiconductor Corporation |
| 元件分类： | 串行ADC |
| 英文描述： | 8-Bit uP Compatible A/D Converters |
| 中文描述： | 8位的兼容的A / D转换器 |
| 文件页数： | 16/41页 |
| 文件大小： | 1118K |
| 代理商： | ADC0805 |
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Typical Applications
(Continued)
Functional Description
1.0 UNDERSTANDING A/D ERROR SPECS
A perfect A/D transfer characteristic (staircase waveform) is
shown in Figure 1 The horizontal scale is analog input volt-
age and the particular points labeled are in steps of 1 LSB
(19.53 mV with 2.5V tied to the V
/2 pin). The digital out-
put codes that correspond to these inputs are shown as D1,
D, and D+1. For the perfect A/D, not only will center-value
(A1, A, A+1, . . . . ) analog inputs produce the correct out-
put digital codes, but also each riser (the transitions between
adjacent output codes) will be located
±
1
2
LSB away from
each center-value. As shown, the risers are ideal and have
no width. Correct digital output codes will be provided for a
range of analog input voltages that extend
±
1
2
LSB from the
ideal center-values. Each tread (the range of analog input
voltage that provides the same digital output code) is there-
fore 1 LSB wide.
Sampling an AC Input Signal
DS005671-78
Note 11:
Oversample whenever possible [keep fs
>
2f(60)] to eliminate input frequency folding (aliasing) and to allow for the skirt response of the filter.
Note 12:
Consider the amplitude errors which are introduced within the passband of the filter.
70% Power Savings by Clock Gating
DS005671-79
(Complete shutdown takes
≈
30 seconds.)
Power Savings by A/D and V
REF
Shutdown
DS005671-80
*Use ADC0801, 02, 03 or 05 for lowest power consumption.
Note: Logic inputs can be driven to V
CC
with A/D supply at zero volts.
Buffer prevents data bus from overdriving output of A/D when in shutdown mode.
A
www.national.com
16
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相关代理商/技术参数 |
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|---|---|
| ADC0805CN | 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 |
| ADC0805IN | 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 |
| ADC0805LCN | 制造商:OC White Company 功能描述:ADC Single SAR 8-bit Parallel 20-Pin PDIP Rail |
| ADC0805LCN/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 |
| ADC0805LCN/B+ | 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 |
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