Datasheet

dsPIC33FJXXXGPX06A/X08A/X10A
DS70593D-page 284  2009-2012 Microchip Technology Inc.
TABLE 25-17: PLL CLOCK TIMING SPECIFICATIONS (VDD = 3.0V TO 3.6V)
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  T
A  +125°C for Extended
Param
No.
Symbol Characteristic Min Typ
(1)
Max Units Conditions
OS50 F
PLLI PLL Voltage Controlled
Oscillator (VCO) Input
Frequency Range
(2)
0.8 — 8.0 MHz ECPLL, HSPLL, XTPLL
modes
OS51 FSYS On-Chip VCO System
Frequency
100 — 200 MHz —
OS52 T
LOCK PLL Start-up Time (Lock Time) 0.9 1.5 3.1 ms —
OS53 DCLK CLKO Stability (Jitter) -3.0 0.5 3.0 % Measured over 100 ms
period
Note 1: Data in “Typ” column is at 3.3V, 25°C unless otherwise stated.
2: These parameters are characterized by similarity but are not tested in manufacturing. This specification is
based on clock cycle by clock cycle measurements. To calculate the effective jitter for individual time base
or communication clocks used by peripherals use the formula:
Peripheral Clock Jitter = DCLK / √(F
OSC/Peripheral bit rate clock)
Example Only: Fosc = 80 MHz, DCLK = 3%, SPI bit rate clock, (i.e. SCK), is 5 MHz
SPI SCK Jitter = [ DCLK / √(80 MHz/5 MHz)] = [3%/ √16] = [3% / 4] = 0.75%
TABLE 25-18: AC CHARACTERISTICS: INTERNAL FRC ACCURACY
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  T
A  +125°C for Extended
Param
No.
Characteristic Min Typ Max Units Conditions
Internal FRC Accuracy @ FRC Frequency = 7.37 MHz
(1)
F20a FRC -2 — +2 % -40°C  TA +85°C VDD = 3.0-3.6V
F20b FRC -5 — +5 % -40°C  TA +125°C VDD = 3.0-3.6V
Note 1: Frequency calibrated at 25°C and 3.3V. TUN bits can be used to compensate for temperature drift.
TABLE 25-19: INTERNAL LPRC ACCURACY
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated)
Operating temperature -40°C  TA  +85°C for Industrial
-40°C  T
A  +125°C for Extended
Param
No.
Characteristic Min Typ Max Units Conditions
LPRC @ 32.768 kHz
(1)
F21a LPRC -30 — +30 % -40°C  TA +85°C —
F21b LPRC -35 — +35 % -40°C  T
A +125°C —
Note 1: Change of LPRC frequency as VDD changes.