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LM285D-2-5 数据表(PDF) 11 Page - Texas Instruments

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部件名 LM285D-2-5
功能描述  Micropower Voltage References
Download  25 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM285D-2-5 数据表(HTML) 11 Page - Texas Instruments

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CATHODE
1
NC
2
NC
3
4
8
7
NC
6
ANODE
5
NC
Rsup
Vsup
CL
GND
NC
NC
GND
11
LM285-2.5, LM385-2.5, LM385B-2.5
www.ti.com
SLVS023K – JANUARY 1989 – REVISED MARCH 2016
Product Folder Links: LM285-2.5 LM385-2.5 LM385B-2.5
Submit Documentation Feedback
Copyright © 1989–2016, Texas Instruments Incorporated
9 Power Supply Recommendations
The supply voltage should be current limited to ensure that the maximum cathode current is not exceeded.
For applications shunting high currents (30 mA maximum), pay attention to the cathode and anode trace lengths,
and adjust the width of the traces to have the proper current density.
10 Layout
10.1 Layout Guidelines
Figure 12 shows an example of a PCB layout of LMx85x-2.5. Some key Vref noise considerations are:
It is optional to connect a low-ESR, 0.1-
μF (CL) ceramic bypass capacitor on the cathode pin node.
Decouple other active devices in the system per the device specifications.
Using a solid ground plane helps distribute heat and reduces electromagnetic interference (EMI) noise pickup.
Place the external components as close to the device as possible. This configuration prevents parasitic errors
(such as the Seebeck effect) from occurring.
Do not run sensitive analog traces in parallel with digital traces. Avoid crossing digital and analog traces if
possible and only make perpendicular crossings when absolutely necessary.
10.2 Layout Example
Figure 12. Layout Diagram


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