AFE7901 datasheet(40/160 Pages) TI

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7.12.1 RX Typical Characteristics 30 MHz and 400 MHz (continued)

Typical values at TA = +25°C. Default conditions at 30MHz: ADC Sampling Rate = 1500 MSPS, output sample rate = 62.5

MSPS (decimate by 24x), PLL clock mode with fREF = 500 MHz, AIN = –3 dBFS, DSA setting = 3 dB. Default conditions at

400 MHz: ADC Sampling Rate = 1500 MSPS, output sample rate = 125 MSPS (decimate by 12x), PLL clock mode with fREF

= 500 MHz, AIN = –3 dBFS, DSA setting = 3 dB.

Input Amplitude (dBFS)

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

-130

-125

-120

-115

-110

-105

-100

-95

-90

-85

DSA = 3dB, Temp = -40C

DSA = 3dB, Temp = 25C

DSA = 3dB, Temp = 110C

DSA = 12dB, Temp = -40C

DSA = 12dB, Temp = 25C

DSA = 12dB, Temp = 110C

fADC = 1500 MSPS, fNCO = 32.13 MHz, Decimate by 24x

Figure 7-25. HD2 vs Input Amplitude at 30 MHz

DSA Setting (dB)

-120

-110

-100

-90

-80

-70

-60

-12dBFS, -40C

-12dBFS, 25C

-12dBFS, 110C

-6dBFS, -40C

-6dBFS, 25C

-6dBFS, 110C

-3dBFS, -40C

-3dBFS, 25C

-3dBFS, 110C

fADC = 1500 MSPS, fNCO = 32. , Decimate by 24x

Figure 7-26. HD2 vs DSA Setting at 30 MHz

Input Amplitude (dBFS)

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

-130

-125

-120

-115

-110

-105

-100

-95

-90

-85

-80

-75

-70

DSA = 3dB, Temp = -40C

DSA = 3dB, Temp = 25C

DSA = 3dB, Temp = 110C

DSA = 12dB, Temp = -40C

DSA = 12dB, Temp = 25C

DSA = 12dB, Temp = 110C

fADC = 1500 MSPS, fNCO = 32.13 MHz, Decimate by 24x

Figure 7-27. HD3 vs Input Amplitude at 30 MHz

DSA Setting (dB)

-110

-100

-90

-80

-70

-60

-50

-12dBFS, -40C

-12dBFS, 25C

-12dBFS, 110C

-6dBFS, -40C

-6dBFS, 25C

-6dBFS, 110C

-3dBFS, -40C

-3dBFS, 25C

-3dBFS, 110C

fADC = 1500 MSPS, fNCO = 32.13 MHz, Decimate by 24x

Figure 7-28. HD3 vs DSA Setting at 30 MHz

Normalized to 4000 MHz

Figure 7-29. RX In-Band Gain Flatness, fIN = 400 MHz

Differential Amplitude Error = PIN(DSA Setting – 1) – PIN(DSA

Setting) + 1

Figure 7-30. RX Uncalibrated Differential Amplitude Error vs

DSA Setting at 30 MHz

AFE7901

SBASAO5 – APRIL 2023

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