CC2560A_16 Datasheet, PDF (23/51 Pages) Texas Instruments – Dual-Mode Bluetooth Controller

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V_IN
CC2560A NRND; CC2564 NRND
CC2560A, CC2560B, CC2564, CC2564B
SWRS121E – JULY 2012 – REVISED JANUARY 2016
1.6 V
VPP = 0.4 – 1.6 Vp-p
V_dc = 0.2 – 1.4 V
0
Figure 6-5. External Fast Clock (Sine Wave, DC-Coupled)
t
SWRS097-023
6.3.2.2 External F_REF Sine Wave, AC-Coupled
Figure 6-6 and Figure 6-7 show the configuration when using a sine wave, AC-coupled external source for
the fast-clock input.
FREFP
CC256x
68 pF
FREFM
VDD_IO
SWRS121-008
Figure 6-6. Clock Configuration (Sine Wave, AC-Coupled)
V_IN [V]
1V
VPP = 0.4 – 1.6 Vp-p
0.8
0.2
0
t
–0.2
–0.8
SWRS097-022
Figure 6-7. External Fast Clock (Sine Wave, AC-Coupled)
In cases where the input amplitude is greater than 1.6 Vp-p, the amplitude can be reduced to within limits.
Using a small series capacitor forms a voltage divider with the internal input capacitance of approximately
2 pF to provide the required amplitude at the device input.
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Detailed Description
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