ADIN2111CCPZ-R7 datasheet(37/129 Pages) AD

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Data Sheet

ADIN2111

APPLICATIONS INFORMATION

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Rev. A | 37 of 129

Figure 20. Crystal Oscillator Connection

External 25 MHz Clock Input

The clock source must be a dc-coupled with the ADIN2111 XTAL_I/

CLK_IN pin input, and the XTAL_O pin must be left open circuit.

With 0.8 V ≤ VCLK_IN p-p ≤ 2.5 V, the following results:

►

For 0.8 V ≤ VS p-p ≤ 1.0 V, the following is true:

►

R1 = 50 Ω

►

R2 is not required

►

For 1.0 V < VS p-p < 1.8 V, the following is true:

►

For best performance, set VCLK_IN to 1.0 V p-p

►

500 Ω ≤ R1 ≤ 2 kΩ

►

1 kΩ ≤ R2 ≤ 2 kΩ

►

VS p-p – VCLK_IN p-p > 0.2 V

►

R2 = VCLK_IN p−p × R1

VS p−p− VCLK_IN p−p

►

For 1.8 V ≤ VS p-p, the following is true:

►

R1 = 2 kΩ

►

R2 = 2 kΩ

Figure 21. External 25 MHz Clock Input Circuit

Table 27. R1 and R2 Values for Different VS p-p Values with VCLK_IN = 1 V p-p

VS (V p-p)

1.0

50 Ω

Not applicable

1.2

500 Ω

2.5 kΩ

1.8

2 kΩ

2.2

2 kΩ

Table 27. R1 and R2 Values for Different VS p-p Values with VCLK_IN = 1 V p-p

(Continued)

VS (V p-p)

2.5

2 kΩ

2.8

2 kΩ

3.0

2 kΩ

3.3

2 kΩ

ELECTROMAGNETIC COMPATIBILITY (EMC)

AND ELECTROMAGNETIC IMMUNITY (EMI)

The ADIN2111 was tested at the system level for EMC and EMI.

Table 28 summarizes the results.

Table 28. EMC/EMI Tests Conducted on ADIN2111 at System Level

EMC/EMI Test

Withstand Threshold/Class

IEC 61000-4-4 EFT

±4 kV

IEC 61000-4-2 ESD (contact discharge) ±4 kV

IEC 61000-4-2 ESD (air discharge)

±8 kV

IEC 61000-4-5 Surge

±4 kV

IEC 61000-4-6 Conducted Immunity

10 V/m

IEC 61000-4-3 Radiated Immunity

Class A

EN 55032 Radiated Emissions

Class B

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