AFE4403 datasheet(12/85 Pages) TI2

12 / 85 page

Duty Cycle (%)

100

102

104

106

108

Temperature = -40q C

Temperature = 27q C

Temperature = 85q C

Temperature (q C)

-40

-20

100

3.96

3.98

4.02

4.04

4.06

Frequency (Hz) of Tone at RX_SUP Pin

100

1000

10000

100000

1000000

100

120

Spacing between LED and AMB Sampling Instants (Ps)

1000

2000

3000

4000

5000

LED Data

(LED - AMB) Data

AFE4404

SBAS689D – JUNE 2015 – REVISED DECEMBER 2016

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Typical Characteristics (continued)

At 25°C, TX_SUP = 4 V, RX_SUP = IO_SUP = 3.3 V, 100-Hz PRF, 25% duty cycle, Rf = 500 kΩ, Cf is adjusted to keep the

TIA time constant at 1/10th of the sampling duration, 8-MHz external clock (with CLKDIV_EXTMODE set to divide-by-2),

CLKDIV_PRF = 1, detector CIN = 50 pF, ADC averaging = max allowed, SNR (dBFS) = noise referred to full-scale range of

2 V, noise integrated from 1 Hz to Nyquist (= PRF / 2), and values assigned to CLKDIV_EXTMODE and CLK_DIV_PRF

parameters correspond to division ratios controlled by these modes, unless otherwise specified.

Duty cycle = 1%

Figure 19. PSRR vs Tone Frequency at RX_SUP

PRF = 200 Hz, NUMAV = 0

Figure 20. Rejection of a 50-Hz Differential Tone Across

Spacing Between LED and Ambient Phases

Figure 21. Receiver SNR in a 20-Hz Bandwidth vs

Duty Cycle Across Different Temperatures

Figure 22. Internal Oscillator Frequency vs

Temperature on a Typical Unit

AFE4403 Datasheet(PDF) 12 Page - Texas Instruments

AFE4403 Datasheet(HTML) 12 Page - Texas Instruments

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