71M6511/71M6511H
Single-Phase Energy Meter IC
A Maxim Integrated Products Brand
DATA SHEET
NOVEMBER 2010
VREF, VBIAS
Unless otherwise specified, VREF_DIS =0
PARAMETER
VREF output voltage, VNOM(25)
CONDITION
Ta = 22oC
MIN
1.193
TYP
1.195
MAX
1.197
UNIT
V
VREF chop step
40
mV
VNOM definition
VNOM(T) = VREF(22) + (T–22)TC1 + (T–22) TC2
VREF output impedance
A
VREF_CAL = 1,
I LOAD = 10μA, -10μA
2
2.5
V
-- If TRIMBGA and TRIMBGB available ( 6511H ) --
VREF temperature coefficients
TC1 (linear)
x(33-0.28y) + 0.33y + 7.9
? 500 TRIM _ BGA ? 370000
y =
μV/°C
TC2 (quadratic)
TRIMBGA, TRIMBGB, TRIMM[2:0]: See
TRIMSEL , TRIM registers
VREF(T) deviation from VNOM(T)
x(0.02-0.0002y) – 0.46
where x = 0.1TRIMBGB - 0.14(TRIMM[2:0]+0.5),
TEMP _ NOM
4 . 7404
900
μV/°C
2
VREF ( T ) ? VNOM ( T )
10 6
-10
10
ppm/oC
VNOM
max(| T ? 22 |, 40 )
-- If TRIMBGA and TRIMBGB not available ( 6511 ) --
VREF temperature coefficients
μV/°C
TC1 (linear)
TC2 (quadratic)
VREF(T) deviation from VNOM(T)
7.0
-0.341
μV/oC
2
-40
VREF ( T ) ? VNOM ( T )
10 6
Ta = -40oC to +85oC
1
+40 1
ppm/oC
VNOM
max(| T ? 22 |, 40 )
VREF aging
Ta = 25oC
± 25
ppm/
year
VBIAS output voltage
VBIAS output impedance
Ta = 25oC
Ta = -40oC to 85oC
I LOAD = 1mA, -1mA
(-1%)
(-2%) 1
1.5
1.5 1
240
(+1%)
(+2%) 1
500
V
V
Ω
Guaranteed by design, not subject to test.
This relationship describes the nominal behavior of VREF at different temperatures.
1
A
CRYSTAL OSCILLATOR
Crystal is disconnected. Test load is series 200pF, 100k ? connected between DGND and XOUT.
PARAMETER
Maximum Output Power to Crystal
4
CONDITION
Crystal connected
MIN
TYP
MAX
1
UNIT
μW
XIN to XOUT Capacitance
Capacitance to DGND
XIN
XOUT
Watchdog RTC_OK threshold
Page: 88 of 98
? 2005–2010 Teridian Semiconductor Corporation
3
5
5
25
pF
pF
pF
kHz
V2.7
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