71M6521BE Datasheet, PDF (87/97 Pages) Teridian Semiconductor Corporation – Energy Meter IC

71M6521BE
Energy Meter IC
DATA SHEET
JANUARY 2008
LOW POWER VOLTAGE REGULATOR
Unless otherwise specified, V3P3SYS=V3P3A=0, PB=GND (BROWNOUT)
PARAMETER
CONDITION
MIN
TYP
V2P5
ILOAD=0
2.0
2.5
V2P5 load regulation
ILOAD=0mA to 1mA
VBAT voltage requirement
ILOAD=1mA,
Reduce VBAT until
REG_LP_OK=0
PSRR ΔV2P5/ΔVBAT
ILOAD=0
-50
MAX
2.7
30
3.0
50
UNIT
V
mV
V
mV/V
CRYSTAL OSCILLATOR
PARAMETER
Maximum Output Power to Crystal
XIN to XOUT Capacitance
Capacitance to DGND
XIN
XOUT
CONDITION
Crystal connected
MIN
TYP
MAX UNIT
1
μW
3
pF
5
pF
5
pF
VREF, VBIAS
Unless otherwise specified, VREF_DIS=0
PARAMETER
VREF output voltage, VNOM(25)
VREF chop step
VREF output impedance
VNOM definition^A
CONDITION
MIN
TYP MAX
Ta = 22ºC
1.193 1.195 1.197
50
VREF_CAL =1,
ILOAD = 10µA, -10µA
2.5
VNOM(T ) = VREF(22) + (T − 22)TC1+ (T − 22)² TC2
VREF temperature coefficients
TC1
TC2
VREF aging
VREF(T) deviation from VNOM(T)
VREF(T ) − VNOM(T ) 10⁶
Ta = -40ºC to +85ºC
+7.0
-0.341
±25
-40
+40
VNOM
62
VBIAS voltage
Ta = 25ºC
Ta = -40ºC to 85ºC
(-1%)
1.6
(-4%)
1.6
A _{This relationship describes the nominal behavior of VREF at different temperatures.}
(+1%)
(+4%)
UNIT
V
mV
kΩ
V
µV/ºC
µV/°C²
ppm/year
ppm/ºC
V
V
V1.0
© 2005-2008 TERIDIAN Semiconductor Corporation
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