AFE7950-SP datasheet(85/126 Pages) TI2

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4.12.8 RX Typical Characteristics at 800MHz (continued)

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

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

DSA (dB)

-0.04

-0.02

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

1RX

2RX

3RX

4RX

With 0.8GHz matching

Integrated Amplitude Error = PIN(DSA Setting) – PIN(DSA

Setting = 0) + (DSA Setting)

Figure 4-291. RX Calibrated Integrated Amplitude Error vs DSA

Setting at 2.6GHz

DSA (dB)

-0.4

-0.2

0.2

0.4

0.6

1RX

2RX

3RX

4RX

With 0.8GHz matching

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

PhaseIN(DSA Setting)

Figure 4-292. RX Uncalibrated Differential Phase Error vs DSA

Setting at 0.8GHz

DSA (dB)

-0.4

-0.3

-0.2

-0.1

0.1

0.2

0.3

0.4

0.5

1RX

2RX

3RX

4RX

With 0.8GHz matching

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

PhaseIN(DSA Setting)

Figure 4-293. RX Calibrated Differential Phase Error vs DSA

Setting at 0.8GHz

DSA (dB)

-1.2

-0.9

-0.6

-0.3

0.3

0.6

0.9

1.2

1RX

2RX

3RX

4RX

With 0.8GHz matching

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

Setting = 0)

Figure 4-294. RX Uncalibrated Integrated Phase Error vs DSA

Setting at 0.8GHz

DSA (dB)

-0.6

-0.4

-0.2

0.2

0.4

0.6

1RX

2RX

3RX

4RX

With 0.8GHz matching

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

Setting = 0)

Figure 4-295. RX Calibrated Integrated Phase Error vs DSA

Setting at 0.8GHz

Output Frequency (MHz)

-250 -200 -150 -100

-50

100

150

200

250

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

SNR = 63.2dBFS

With 0.8GHz matching, fIN = 840MHz, AIN= –3dBFS

Figure 4-296. RX Output FFT at 0.8GHz

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AFE7950-SP

SBASAG7A – MARCH 2024 – REVISED AUGUST 2024

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