Datasheet

71M6521DE/DH/FE Data Sheet
Rev 3 Page: 93 of 107
CRYSTAL OSCILLATOR
PARAMETER
CONDITION
MIN
TYP
MAX
UNIT
Maximum Output Power to Crystal
Crystal connected
1
μW
XIN to XOUT Capacitance
3
pF
Capacitance to DGND
XIN
XOUT
5
5
pF
pF
VREF, VBIAS
Unless otherwise specified, VREF_DIS=0
PARAMETER
CONDITION
MIN
TYP
MAX
UNIT
VREF output voltage, VNOM(25)
Ta = 22ºC
1.193
1.195
1.197
V
VREF chop step
50
mV
VREF output impedance
VREF_CAL =1,
ILOAD = 10 µA, -10 µA
2.5 kΩ
VNOM definition
2
2)22(1)22()22()(
2
TCTTCTVREFTVNOM −+−+=
V
-- If TRIMBGA and TRIMBGB not available --
VREF temperature coefficients
TC1
TC2
+7.0
-0.341
µV/ºC
µV/°C
2
VREF(T) deviation from VNOM(T)
)40,22max(
10
)(
)()(
6
−
−
TTVNOM
TVNOMTVREF
Ta = -40ºC to +85ºC -40
1
+40
1
ppm/ºC
-- If TRIMBGA and TRIMBGB are available (71M6521DH) --
Define the following variables:

,
 __/2

--
where TEMP_RAW_X is measured with FIRLEN=1

,
=

,
.
--this calculates the value of TEMP
22
if measured with FIRLEN=0
 = 0.1    0.143 
(
 + 0.5
)
 =

,

(
500   + 370000
)
900
 =
(
56.2  
)
 0.55
VNOM temperature coefficients
(Δv and ΔT are defined in the
section entitled “Voltage Refer-
ence”)
TC1
TC2
 + 19  0.065 + 0.34 + 8.0
0.015  0.0013  0.35
μV/ºC
μV/ºC
2
VREF(T) deviation from VNOM(T)
)40,22max(
10
)(
)()(
6
−
−
TTVNOM
TVNOMTVREF
Ta = -40ºC to +85ºC -20
1
+20
1
ppm/ºC
VREF aging
±25
ppm/ year
VBIAS voltage
Ta = 25ºC
Ta = -40ºC to 85ºC
(-1%)
(-4%)
1
1.6
1.6
1
(+1%)
(+4%)
1
V
V
1
Guaranteed by design; not production tested.
2
This relationship describes the nominal behavior of VREF at different temperatures.