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AFE4403 Datasheet(PDF) 28 Page - Texas Instruments

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Part # AFE4403
Description  AFE4403 Ultra-Small, Integrated Analog Front-End for Heart Rate Monitors and Low-Cost Pulse Oximeters
PDF  97 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

AFE4403 Datasheet(HTML) 28 Page - Texas Instruments

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8-MHz Crystal
Timer
Module
Diagnostics
Module
ADC
Oscillator
Divide-
by-2
CLKOUT
4 MHz
XIN
XOUT
AFE4403
SBAS650B – MAY 2014 – REVISED JULY 2014
www.ti.com
8.3.2 Clocking and Timing Signal Generation
The crystal oscillator generates a master clock signal using an external crystal. In the default mode, a divide-by-2
block converts the 8-MHz clock to 4 MHz, which is used by the AFE to operate the timer modules, ADC, and
diagnostics. The 4-MHz clock is buffered and output from the AFE in order to clock an external microcontroller.
The clocking functionality is shown in Figure 42.
Figure 42. AFE Clocking
28
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