XE8000EV108 Semtech, XE8000EV108 Datasheet - Page 45
XE8000EV108
Manufacturer Part Number
XE8000EV108
Description
EVAL BOARD FOR XE8806/XE8807
Manufacturer
Semtech
Type
MCUr
Specifications of XE8000EV108
Contents
Fully Assembled Evaluation Board
For Use With/related Products
XE88LC06AMI026
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Figure 7-2. RC oscillator nominal frequency tuning.
7.6.3
Table 7-8. RC oscillator specifications
Note 1: this is the frequency tolerance when all trimming codes are 0. The frequency at start-up is about twice as
high.
Note 2: frequency shift as a function of VBAT with normal regulator function.
Note 3: frequency shift as a function of VBAT while the regulator is short-circuited to VBAT.
The tolerances on the minimal frequency and the drift with supply or temperature can be cancelled using the
software or hardware DFLL (digital frequency locked loop) which uses the crystal oscillator as a reference
frequency.
© Semtech 2006
sym
f
RcFreqFine
RC_su
PSRR @ DC
∆f/∆T
RCmin
1E+07
1E+06
1E+05
1E+04
RC oscillator specifications
description
Lowest RC frequency
fine tuning step
startup time
Supply voltage
dependence
Temperature
dependence
RcFreqFine(5:0)
0000
RcFreqRange='1'
RcFreqRange='0'
0001
min
25
TBD
TBD
typ
1.4
0.1
40
30
3
7-6
0011
max
2.0
55
50
5
unit
kHz
%
us
us
%/V
%/V
%/°C
0111
Comments
Note 1
BiasRc=0
BiasRc=1
Note 2
Note 3
XE8806A/XE8807A
RcFreqCoarse(3:0)
RcFreqFine(5:0)
1111
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