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ADC3908CSSS 数据表(PDF) 119 Page - Texas Instruments

部件名 ADC3908CSSS
功能描述  ADC3910Dx and ADC3910Sx 10-bit, 25 to 125MSPS Low Latency, Low Power, Small, Single and Dual Channel ADC with Integrated Input Buffers
PDF  131 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

ADC3908CSSS 数据表(HTML) 119 Page - Texas Instruments

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DC/DC
Regulator
5V-12V
LDO
GND
GND
AVDD
IOVDD
FB
FB
FB
47uF
47uF
10uF 10uF
0.1uF
10uF 10uF
0.1uF
2.1V
1.8V
FB = Ferrite bead filter
GND
GND
Figure 7-5. Example: LDO Linear Regulator Approach
DC/DC
Regulator
5V-12V
GND
GND
AVDD
IOVDD
EMI FILTER
FB
FB
10uF 10uF
0.1uF
10uF 10uF
0.1uF
1.8V
GND
10uF 10uF 10uF
Ripple filter notch frequency to match switching frequency of the DC/DC regulator
FB = Ferrite bead filter
Figure 7-6. Example: Switcher-Only Approach
7.5 Layout
7.5.1 Layout Guidelines
There are several critical signals which require specific care during board design:
1. Analog input and clock signals
• Traces should be as short as possible and vias should be avoided where possible to minimize impedance
discontinuities.
2. Digital output interface
• Traces should be as short as possible to reduce capacitive load seen by the CMOS outputs.
• Series resistance should be used to reduce instantaneous current demand and improve signal integrity.
3. Power and ground connections
• Provide low resistance connection paths to all power and ground pins.
• Use power and ground planes instead of traces.
• Avoid narrow, isolated paths which increase the connection resistance.
• Use a signal/ground/power circuit board stackup to maximize coupling between the ground and power
plane.
www.ti.com
ADC3910D025, ADC3910D065, ADC3910D125
ADC3910S025, ADC3910S065, ADC3910S125
SBASAD1A – DECEMBER 2023 – REVISED MAY 2024
Copyright © 2024 Texas Instruments Incorporated
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Product Folder Links: ADC3910D025 ADC3910D065 ADC3910D125 ADC3910S025 ADC3910S065 ADC3910S125



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