AFE4403 datasheet(24/85 Pages) TI2

Part #	AFE4403

Description	AFE4404 Ultra-Small, Integrated AFE for Wearable, Optical, Heart-Rate Monitoring and Bio-Sensing

PDF	85 Pages

Scroll/Zoom	100%

Manufacturer	TI2 [Texas Instruments]

Direct Link	https://www.ti.com

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24 / 85 page

LED2

SLED2

CONVLED2

ADCRST0

AFE4404

SBAS689D – JUNE 2015 – REVISED DECEMBER 2016

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Product Folder Links: AFE4404

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(1)

Refers to one clock period of CLK_TE.

(2)

See Figure 36 for notations of the clocking domain.

(3)

tADC = 1 / fADC.

8.3.6.3 Receiver Timing

The timing engine can be programmed to set the different phases of the receiver. The relative timings of the LED

phase, sampling phase, ADC reset phase, and ADC conversion phases are shown in Figure 33 and Table 7.

Figure 33. Receiver Timing Guidelines

Table 7. Receiver Timing Details

MIN

MAX

UNIT

Start of LED to start of sampling

Max [25, (0.2 × LED pulse duration)]

µs

End of LED to start of ADC reset phase

Counts(1)

Duration of ADC reset phase

Counts

End of ADC reset phase to start of ADC conversion phase

Count

Duration of ADC conversion phase(2)

(NUMAV + 2) × 200 × tADC + 15

(3)

µs

AFE4403 Datasheet(PDF) 24 Page - Texas Instruments