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参数资料
| 型号： | ADC08062 |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | 500 ns A/D Converter with S/H Function and Input Multiplexer |
| 中文描述： | 500纳秒的A / D转换器与S /高功能和输入复用器 |
| 文件页数： | 14/16页 |
| 文件大小： | 307K |
| 代理商： | ADC08062 |
Application Information
(Continued)
The ADC08061 can perform accurate conversions of
full-scale input signals at frequencies from dc to more than
300 kHz (full power bandwidth) without the need of an exter-
nal sample-and-hold (S/H).
7.0 LAYOUT, GROUNDS, AND BYPASSING
In order to ensure fast, accurate conversions from the
ADC08061/2, it is necessary to use appropriate circuit board
layout techniques. Ideally, the analog-to-digital converter’s
ground reference should be low impedance and free of noise
from other parts of the system. Digital circuits can produce a
great deal of noise on their ground returns and, therefore,
should have their own separate ground lines. Best perfor-
mance is obtained using separate ground planes for the digi-
tal and analog parts of the system.
The analog inputs should be isolated from noisy signal
traces to avoid having spurious signals couple to the input.
Any external component (e.g., an input filter capacitor) con-
nected across the inputs should be returned to a very clean
ground point. Incorrectly grounding the ADC08061/2 will re-
sult in reduced conversion accuracy.
The V
+
supply pin, V
, and V
(if not grounded)
should be bypassed with a parallel combination of a 0.1 μF
ceramic capacitor and a 10 μF tantalum capacitor placed as
close as possible to the supply pin using short circuit board
traces. See Figures 8, 9
External Reference 2.5V Full-Scale
(Standard Application)
DS011086-20
Bypass capacitors consist of a 0.1 μF
Note :
Power Supply as Reference
DS011086-21
Input Not Referred to GND
DS011086-22
IN
() must be capable
* Signal source driving V
FIGURE 8. Analog Input Options
DS011086-23
Note the multiple bypass capacitors on the reference and power supply pins. V
IN1
is shown with ashould be bypass to analog ground using multiple capacitors if it is not
FIGURE 9. Typical Connection
www.national.com
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相关代理商/技术参数 |
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|---|---|
| ADC08062 WAF | 制造商:Texas Instruments 功能描述: |
| ADC08062BIJ | 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 |
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| ADC08062CIJ | 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 |
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