AFE7901 datasheet(83/160 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

Figure 7-263. Dual Tone Spectrum at 30 MHz and -60d BFS (0 -

100 MHz)

Output Amplitude (dBFS)

-60 -55 -50 -45 -40 -35 -30 -25 -20 -15 -10

-5

-160

-159

-158

-157

-156

-155

-154

-153

-152

-151

-150

Temp = -40C

Temp = 25C

Temp = 105C

measured at +50 MHz offset

Figure 7-264. Noise Spectral Density vs Digital Amplitude at 30

MHz

DSA Setting (dB)

-160

-155

-150

-145

-140

-135

-130

-125

-120

-12 dBFS, Temp = -40C

-12 dBFS, Temp = 25C

-12 dBFS, Temp = 105C

-1 dBFS, Temp = -40C

-1 dBFS, Temp = 25C

-1 dBFS, Temp = 105C

measured at +50 MHz offset

Figure 7-265. Noise Spectral Density vs DSA Setting at 30 MHz

DSA Setting (dB)

-90

-80

-70

-60

-50

-40

-30

-13 dBFS, Temp = -40C

-13 dBFS, Temp = 25C

-13 dBFS, Temp = 105C

-7 dBFS, Temp = -40C

-7 dBFS, Temp = 25C

-7 dBFS, Temp = 105C

Figure 7-266. IMD3 vs DSA Setting at 30 MHz

Output Frequency (MHz)

100

120

140

160

180

200

-12 dBFS

-6 dBFS

-1 dBFS

Figure 7-267. HD2 vs Frequency 0 - 200 MHz

Output Frequency (MHz)

100

120

140

160

180

200

100

-12 dBFS

-6 dBFS

-1 dBFS

Figure 7-268. HD3 vs Frequency 0 - 200 MHz

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AFE7901

SBASAO5 – APRIL 2023

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