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| AFE4490_14 Datasheet, PDF (86/96 Pages) Texas Instruments – Integrated Analog Front-End for Pulse Oximeters | |||
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AFE4490
SBAS602G â DECEMBER 2012 â REVISED JUNE 2014
11 Layout
www.ti.com
11.1 Layout Guidelines
Some key layout guidelines are:
1. TXP, TXN are fast switching lines and should be routed away from sensitive reference lines as well as from
the INP, INN inputs.
2. If required to route long, TI recommends that the VCM be used as a shield for the INP, INN lines.
3. The device can draw high switching currents from the LED_DRV_SUP pin. Therefore, having a decoupling
capacitor electrically close to the pin is recommended.
11.2 Layout Example
Figure 139. Typical Layout of the AFE4490 Board
86
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