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CC2531F256RHAR Datasheet(PDF) 8 Page - Texas Instruments |
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CC2531F256RHAR Datasheet(HTML) 8 Page - Texas Instruments |
8 / 35 page CC2531F128, CC2531F256 SWRS086A – SEPTEMBER 2009 – REVISED JUNE 2010 www.ti.com 32-MHz CRYSTAL OSCILLATOR Measured on Texas Instruments CC2530 EM reference design with TA = 25°C and VDD = 3 V, unless otherwise noted. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Crystal frequency 32 MHz Crystal frequency accuracy –40 40 ppm requirement(1) ESR Equivalent series resistance 6 60 Ω C0 Crystal shunt capacitance 1 7 pF CL Crystal load capacitance 10 16 pF Start-up time 0.3 ms The crystal oscillator must be in power down for a guard time before it is used again. This Power-down guard time requirement is valid for all modes of operation. The 3 ms need for power-down guard time can vary with crystal type and load. (1) Including aging and temperature dependency, as specified by [1] 32.768-kHz CRYSTAL OSCILLATOR Measured on Texas Instruments CC2530 EM reference design with TA = 25°C and VDD = 3 V, unless otherwise noted. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Crystal frequency 32.768 kHz Crystal frequency accuracy –40 40 ppm requirement(1) ESR Equivalent series resistance 40 130 k Ω C0 Crystal shunt capacitance 0.9 2 pF CL Crystal load capacitance 12 16 pF Start-up time 0.4 s (1) Including aging and temperature dependency, as specified by [1] 32-kHz RC OSCILLATOR Measured on Texas Instruments CC2530 EM reference design with TA = 25°C and VDD = 3 V, unless otherwise noted. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Calibrated frequency(1) 32.753 kHz Frequency accuracy after calibration ±0.2% Temperature coefficient(2) 0.4 %/°C Supply-voltage coefficient(3) 3 %/V Calibration time(4) 2 ms (1) The calibrated 32-kHz RC oscillator frequency is the 32-MHz XTAL frequency divided by 977. (2) Frequency drift when temperature changes after calibration (3) Frequency drift when supply voltage changes after calibration (4) When the 32-kHz RC oscillator is enabled, it is calibrated when a switch from the 16-MHz RC oscillator to the 32-MHz crystal oscillator is performed while SLEEPCMD.OSC32K_CALDIS is 0. 8 Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated Product Folder Link(s): CC2531F128 CC2531F256 |
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