CC2545_15 Datasheet, PDF (23/31 Pages) Texas Instruments – System-on-Chip for 2.4-GHz RF Applications

CC2545
www.ti.com
SWRS106B – JUNE 2012 – REVISED FEBRUARY 2013
Crystal
An external 32-MHz crystal with two loading capacitors is used for the 32-MHz crystal oscillator. The load
capacitance seen by the 32-MHz crystal is given by:
C_L =
1
1₊
1
+ C_parasitic
C₂₆₁ C₂₇₁
(1)
A series resistor may be used to comply with ESR requirement.
On-Chip 1.8-V Voltage Regulator Decoupling
The 1.8-V on-chip voltage regulator supplies the 1.8-V digital logic. This regulator requires a decoupling capacitor
(C421) for stable operation.
Power-Supply Decoupling and Filtering
Proper power-supply decoupling must be used for optimum performance. The placement and size of the
decoupling capacitors and the power supply filtering are very important to achieve the best performance in an
application. TI provides a compact reference design that should be followed very closely.
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REVISION HISTORY
Changes from Original (June 2012) to Revision A
Page
• Deleted Product Preview banner .......................................................................................................................................... 1
• Changed the Temperature coefficient Unit value From: mV/°C To: / 0.1°C ......................................................................... 8
• Changed Figure 19 ............................................................................................................................................................. 22
Changes from Revision A (August 2012) to Revision B
Page
• Changed From: RTC Pin Package To: RGZ Pin Package ................................................................................................. 14
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