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REF34-Q1 数据表(PDF) 22 Page - Texas Instruments

部件名 REF34-Q1
功能描述  REF34-Q1 Low-Drift, Low-Power, Small-Footprint Series Voltage References
Download  34 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

REF34-Q1 数据表(HTML) 22 Page - Texas Instruments

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11 Power Supply Recommendations
The REF34-Q1 family of references feature an extremely low-dropout voltage. These references can be
operated with a supply of only 50 mV above the output voltage. TI recommends a supply bypass capacitor
ranging between 0.1 µF to 10 µF.
12 Layout
12.1 Layout Guidelines
Figure 12-1 illustrates an example of a PCB layout for a data acquisition system using the REF34-Q1. Some key
considerations are:
• Connect low-ESR, 0.1-μF ceramic bypass capacitors at VIN, VREF of the REF34-Q1.
• 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.
12.2 Layout Example
1
6
2
3
4
GND_F
GND_S
EN
OUT_F
IN
REF34XX
C
5 OUT_S
Figure 12-1. Layout Example (REF34xx-Q1)
1
5
2
3
4
NIC
OUT
REF34S-Q1
C
OUT
IN
GND
NC
C
IN
Figure 12-2. Layout Example (REF34xxS-Q1)
REF34-Q1
SBAS901B – JULY 2018 – REVISED SEPTEMBER 2020
www.ti.com
22
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Copyright © 2020 Texas Instruments Incorporated
Product Folder Links: REF34-Q1


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