71M6511 Maxim, 71M6511 Datasheet - Page 88

• Manufacturer Part Number: 71M6511
• Description: The 71M6511 and 71M6511H are highly integrated SoCs with an MPU core, RTC, flash, and LCD driver
• Manufacturer: Maxim

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