Datasheet

71M6513/71M6513H
3-Phase Energy Meter IC
DATA SHEET
SEPTEMBER 2011
© 2005-2011 Teridian Semiconductor Corporation Page: 93 of 104
A Maxim Integrated Products Brand
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
40
mV
VREF output impedance
VREF_CAL =1,
ILOAD = 10µA, -10µA
2.5 kΩ
VNOM definition
A
VNOM(T) = VREF(22) + (T–22)TC1 + (T–22)
2
TC2
V
-- If TRIMBGA and TRIMBGB available (6513H) --
VREF temperature coefficients
TC1 (linear)
TC2 (quadratic)
TRIMBGA, TRIMBGB, TRIMM[2:0]: See
TRIMSEL, TRIM registers
x(33-0.28y) + 0.33y + 7.9
x(0.02-0.0002y) – 0.46
where x = 0.1TRIMBGB - 0.14(TRIMM[2:0]+0.5),
900
370000_500
2
_
−−
=
BGATRIM
NOMTEMP
y
µV/°C
µV/°C
2
VREF(T) deviation from VNOM(T)
)40|,22max(|
10)()(
6
−
−
TVNOM
TVNOMTVREF
-10 10 ppm/ºC
-- If TRIMBGA and TRIMBGB not available (6513) --
VREF temperature coefficients
TC1 (linear)
TC2 (quadratic)
7.0
-0.341
µV/ºC
µV/°C
2
VREF(T) deviation from VNOM(T)
)40|,22max(|
10)()(
6
−
−
TVNOM
TVNOMTVREF
Ta = -40ºC to +85ºC -40
1
+40
1
ppm/ºC
VREF aging Ta = 25ºC ±25
ppm/
year
VBIAS output voltage
Ta = 25ºC
Ta = -40ºC to 85ºC
(-1%)
(-2%)
1
1.5
1.5
1
(+1%)
(+2%)
1
V
V
VBIAS output impedance
ILOAD = 1mA, -1mA
240
500
Ω
A
This relationship describes the nominal behavior of VREF at different temperatures.
1
Guaranteed by design; not production tested.
CRYSTAL OSCILLATOR
Crystal is disconnected. Test load is series 200pF, 100kΩ connected between DGND and XOUT.
PARAMETER
CONDITION
MIN
TYP
MAX
UNIT
Maximum Output Power to Crystal
4
Crystal connected
1
μW
Xin to Xout Capacitance
1
3
pF
Capacitance to DGND
1
Xin
Xout
5
5
pF
pF
Watchdog RTC_OK threshold
25
kHz