71m6521fe Maxim Integrated Products, Inc., 71m6521fe Datasheet - Page 90

• Manufacturer Part Number: 71m6521fe
• Description: Energy Meter Ic
• Manufacturer: Maxim Integrated Products, Inc.

CRYSTAL OSCILLATOR
VREF, VBIAS
Unless otherwise specified, VREF_DIS=0
A
LCD DRIVERS
Applies to all COM and SEG pins.
VLCD is V3P3SYS in MISSION mode and VBAT in BROWNOUT and LCD modes.
Page: 90 of 101
VREF
PARAMETER
Maximum Output Power to Crystal
XIN to XOUT Capacitance
Capacitance to DGND
PARAMETER
VREF output voltage, VNOM(25)
VREF chop step
VREF output impedance
VNOM definition
VREF temperature coefficients
VREF aging
VREF(T) deviation from VNOM(T)
VBIAS voltage
PARAMETER
VLC2 Max Voltage
This relationship describes the nominal behavior of VREF at different temperatures.
VLC1 Voltage,
VLC0 Voltage,
XIN
XOUT
TC1
TC2
(
T
VNOM
)
1/3 bias
½ bias
1/3 bias
½ bias
−
VNOM
A
(
T
)
10
62
6
© 2005-2008 TERIDIAN Semiconductor Corporation
With respect to VLCD
With respect to 2*VLC2/3
With respect to VLC2/2
With respect to VLC2/3
With respect to VLC2/2
Crystal connected
Ta = 22ºC
VREF_CAL =1,
I
Ta = -40ºC to +85ºC
Ta = 25ºC
Ta = -40ºC to 85ºC
VNOM
LOAD
CONDITION
= 10µA, -10µA
CONDITION
CONDITION
(
T
)
=
VREF
(
22
71M6521DE/71M6521FE
)
+
(
T
−
22
1.193
(-1%)
(-4%)
MIN
MIN
-40
MIN
-0.1
)
-4
-3
-3
-3
TC
1
+
(
Energy Meter IC
T
-0.341
1.195
+7.0
TYP
TYP
TYP
±25
−
1.6
1.6
22
)
2
TC
(+1%)
(+4%)
1.197
MAX
MAX
2
0+.1
MAX
+40
2.5
50
+2
+2
+2
0
DATASHEET
1
3
5
5
ppm/ºC
µV/°C
µV/ºC
UNIT
ppm/
year
UNIT
UNIT
JANUARY 2008
mV
kΩ
μW
pF
pF
pF
V
V
V
V
%
%
%
%
V
2
v1.0