參數(shù)資料
型號(hào)： AS1523-T
廠商： AUSTRIAMICROSYSTEMS AG
元件分類(lèi)： ADC
英文描述： 10-Bit, 4-Ch, 300ksps, ADC; Package Type: TSSOP-16
封裝： TSSOP-16
文件頁(yè)數(shù)： 25/28頁(yè)
文件大?。?/td> 893K
代理商： AS1523-T
www.austriamicrosystems.com
Revision 1.00
25 - 28
AS1522/AS1523
Data Sheet
- Application Information
Layout Considerations
The AS1522/AS1523 require proper layout and design procedures for optimum performance.
!
Use printed circuit boards; wirewrap boards should not be used.
!
Analog and digital traces should be separate and should not run parallel to each other (especially clock traces).
!
Digital traces should not run beneath the AS1522/AS1523.
!
Use a single-point analog ground at GND, separate from the digital ground (see
Figure 35
). Connect all other ana-
log grounds and DGND to this star ground point for further noise reduction. No other digital system ground should
be connected to this single-point analog ground. The ground return to the power supply for this ground should be
low impedance and as short as possible for noise-free operation.
!
High-frequency noise in the V
DD
power supply may affect the AS1522/AS1523 high-speed comparator. Bypass
this supply to the single-point analog ground with 0.1μF and 4.7μF bypass capacitors. Bypass capacitors should
be as close to the device as possible for optimum power supply noise-rejection. If the power supply is very noisy, a
10
Ω
resistor can be connected as a low-pass filter to attenuate supply noise (see
Figure 35
).
Figure 35. Recommended GND Design
Power
Supplies
Digital
Circuitry
+
+
10
Ω
(Optional)
6
COM
10
GND
V
DD1
GND
GND
V
DD2
DGND
V
DD
16
V
DD2
1
V
DD1
AS1522/
AS1523
7
V
DD3
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PDF描述
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