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参数资料
| 型号： | ADC0800 |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | ECONOLINE: REC3-S_DRW(Z)/H* - 3W DIP Package- 1kVDC Isolation- Wide Input 2:1 & 4:1- Regulated Output- 100% Burned In- UL94V-0 Package Material- Continuous Short Circiut Protection- Efficiency to 80% |
| 中文描述： | ADC0800 8位A / D转换器 |
| 文件页数： | 7/10页 |
| 文件大小： | 166K |
| 代理商： | ADC0800 |
Typical Applications
(Continued)
TESTING THE A/D CONVERTER
There are many degrees of complexity associated with test-
ing an A/D converter. One of the simplest tests is to apply a
known analog input voltage to the converter and use LEDs
to display the resulting digital output code as shown in Fig-
ure 3. Note that the LED drivers invert the digital output of
the A/D converter to provide a binary display. A lab DVM
can be used if a precision voltage source is not available.
After adjusting the zero and full-scale, any number of points
can be checked, as desired.
For ease of testing, a 10.24 V
DC
reference is recommended
for the A/D converter. This provides an LSB of 40 mV
(10.240/256). To adjust the zero of the A/D, an analog input
voltage of
(/2
LSB or 20 mV should be applied and the
zero adjust potentiometer should be set to provide a flicker
on the LSB LED readout with all the other display LEDs
OFF.
To adjust the full-scale adjust potentiometer, an analog in-
put that is 1
(/2
LSB less than the reference (10.240–0.060
or 10.180 V
DC
) should be applied to the analog input and
the full-scale adjusted for a flicker on the LSB LED, but this
time with all the other LEDs ON.
A complete circuit for a simple A/D tester is shown inFigure
4. Note that the clock input voltage swing and the digital
output voltage swings are from 0V to 10.24V. The
MM74C901 provides a voltage translation to 5V operation
and also the logic inversion so the readout LEDs are in bina-
ry.
TL/H/5670–15
FIGURE 3. Basic A/D Tester
TL/H/5670–7
FIGURE 4. Complete Basic Tester Circuit
7
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相关代理商/技术参数 |
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| ADC08004-1CD | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:CMOS 8-bit A/D converters |
| ADC08004-1CN | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:CMOS 8-bit A/D converters |
| ADC08004-1LCD | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:CMOS 8-bit A/D converters |
| ADC08004-1LCN | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:CMOS 8-bit A/D converters |
| ADC0800PCD | 制造商:NSC 制造商全称:National Semiconductor 功能描述:ADC0800 8-Bit A/D Converter |
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