AFE7901 datasheet(62/160 Pages) TI

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7.12.5 RX Typical Characteristics 3.5 GHz (continued)

Typical values at TA = +25°C, ADC Sampling Rate = 2949.12 GHz. Default conditions: output sample rate = 491.52 MSPS

(decimate by 6), PLL clock mode with fREF = 491.52 MHz, AIN = –3 dBFS, DSA setting = 4 dB.

DSA Setting (dB)

-2

-1.5

-1

-0.5

0.5

1.5

-40qC

25qC

105qC

With 3.6 GHz matching

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

PhaseIN(DSA Setting)

Figure 7-143. RX Uncalibrated Phase Error vs DSA Setting at

3.6 GHz

DSA Setting (dB)

-2.5

-2

-1.5

-1

-0.5

0.5

1.5

2.5

-40qC

25qC

105qC

With 3.6 GHz matching

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

PhaseIN(DSA Setting)

Figure 7-144. RX Calibrated Differential Phase Error vs DSA

Setting at 3.6 GHz

DSA Setting (dB)

-5

-4

-3

-2

-1

-40qC

25qC

105qC

With 3.6 GHz matching

Integrated Phase Error = Phase(DSA Setting) – Phase(DSA

Setting = 0)

Figure 7-145. RX Uncalibrated Integrated Phase Error vs DSA

Setting at 3.6 GHz

DSA Setting (dB)

-2.5

-2

-1.5

-1

-0.5

0.5

1.5

2.5

-40qC

25qC

105qC

With 3.6 GHz matching

Integrated Phase Error = Phase(DSA Setting) – Phase(DSA

Setting = 0)

Figure 7-146. RX Calibrated Integrated Phase Error vs DSA

Setting at 3.6 GHz

Frequency (MHz)

-250

250

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

SNR=62.2dBFS

With 3.6 GHz matching , fIN = 3610 MHz, AIN = –3 dBFS

Figure 7-147. RX Output FFT at 3.6 GHz

DSA Setting (dB)

-90

-85

-80

-75

-70

-65

-60

Temp=-40qC

Temp=25qC

Temp=110qC

With 3.5 GHz matching, each tone at –7 dBFS, 20-MHz tone

spacing

Figure 7-148. RX IMD3 vs DSA Setting and Temperature at 3.6

GHz

AFE7901

SBASAO5 – APRIL 2023

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