AFE7901 datasheet(85/160 Pages) TI

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7.12.8 TX Typical Characteristics at 30 MHz and 400 MHz (continued)

Typical values at TA = +25°C with nominal supplies. Default conditions: TX input data rate = 125 MSPS, fDAC = 6000

MSPS (48x interpolation), interleave mode, 1st Nyquist zone output, PLL clock mode with fREF = 500 MHz. Additional default

conditions for all plots, AOUT = –1 dBFS, DSA = 0 dB, Sin(x)/x enabled, DSA calibrated, TX Clock Dither Enabled

Differential Phase Error = PhaseOUT(DSA Setting – 1) –

PhaseOUT(DSA Setting)

Figure 7-275. Uncalibrated TX Differential Phase Error (DNL) at

400 MHz

Differential Phase Error = PhaseOUT(DSA Setting – 1) –

PhaseOUT(DSA Setting)

Figure 7-276. Calibrated TX Differential Phase Error (DNL) at

400 MHz

Integrated Phase Error = PhaseOUT(DSA Setting) –

PhaseOUT(DSASetting = 0)

Figure 7-277. Uncalibrated TX Integrated Phase Error (INL) at

400 MHz

Integrated Phase Error = PhaseOUT(DSA Setting) –

PhaseOUT(DSASetting = 0)

Figure 7-278. Calibrated TX Integrated Phase Error (INL) at 400

MHz

Figure 7-279. Single Tone Spectrum at 400 MHz and -1 dBFS

(Nyquist)

Figure 7-280. Single Tone Spectrum at 400 MHz and -1 dBFS

(±100MHz)

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AFE7901

SBASAO5 – APRIL 2023

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AFE7901 Datasheet(PDF) 85 Page - Texas Instruments