Microchip Technology MA330028 Data Sheet
2011-2013 Microchip Technology Inc.
DS70000657H-page 415
dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X AND PIC24EPXXXGP/MC20X
TABLE 30-18: PLL CLOCK TIMING SPECIFICATIONS
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
Operating temperature
(unless otherwise stated)
Operating temperature
-40°C
T
A
+85°C for Industrial
-40°C
T
A
+125°C for Extended
Param
No.
Symbol
Characteristic
Min.
Typ.
Max.
Units
Conditions
OS50
F
PLLI
PLL Voltage Controlled Oscillator
(VCO) Input Frequency Range
(VCO) Input Frequency Range
0.8
—
8.0
MHz ECPLL, XTPLL modes
OS51
F
VCO
On-Chip VCO System Frequency
120
—
340
MHz
OS52
T
LOCK
PLL Start-up Time (Lock Time)
0.9
1.5
3.1
ms
OS53
D
CLK
CLKO Stability (Jitter)
)
-3
0.5
3
%
Note 1:
Data in “Typical” column is at 3.3V, +25°C unless otherwise stated. Parameters are for design guidance
only and are not tested.
only and are not tested.
2:
This jitter specification is based on clock cycle-by-clock cycle measurements. To get the effective jitter for
individual time bases, or communication clocks used by the application, use the following formula:
individual time bases, or communication clocks used by the application, use the following formula:
For example, if F
OSC
= 120 MHz and the SPIx bit rate = 10 MHz, the effective jitter is as follows:
Effective Jitter
D
CLK
F
OSC
Time Base or Communication Clock
---------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------
=
Effective Jitter
D
CLK
120
10
---------
--------------
D
CLK
12
--------------
D
CLK
3.464
--------------
=
=
=
TABLE 30-19: INTERNAL FRC ACCURACY
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated)
Operating temperature
Operating temperature
-40°C
T
A
+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
(
F20a
FRC
-1.5
0.5
+1.5
%
-40°C
T
A
-10°C
V
DD
= 3.0-3.6V
-1
0.5
+1
%
-10°C
T
A
+85°C
V
DD
= 3.0-3.6V
F20b
FRC
-2
1
+2
%
+85°C
T
A
+125°C V
DD
= 3.0-3.6V
Note 1:
Frequency is calibrated at +25°C and 3.3V. TUNx bits can be used to compensate for temperature drift.
TABLE 30-20: INTERNAL LPRC ACCURACY
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V (unless otherwise stated)
Operating temperature
Operating temperature
-40°C
T
A
+85°C for Industrial
-40°C
T
A
+125°C for Extended
Param
No.
Characteristic
Min.
Typ.
Max.
Units
Conditions
LPRC @ 32.768 kHz
(
)
F21a
LPRC
-30
—
+30
%
-40°C
T
A
-10°C
V
DD
= 3.0-3.6V
-20
—
+20
%
-10°C
T
A
+85°C
V
DD
= 3.0-3.6V
F21b
LPRC
-30
—
+30
%
+85°C
T
A
+125°C V
DD
= 3.0-3.6V
Note 1:
The change of LPRC frequency as V
DD
changes.