71M6541D Maxim, 71M6541D Datasheet - Page 148
71M6541D
Manufacturer Part Number
71M6541D
Description
The 71M6541D/71M6541F/71M6541G/71M6542F/71M6542G are Teridian™ 4th-generation single-phase metering SoCs with a 5MHz 8051-compatible MPU core, low-power RTC with digital temperature compensation, flash memory, and LCD driver
Manufacturer
Maxim
Datasheet
1.71M6541D.pdf
(166 pages)
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Part Number:
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Manufacturer:
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71M6541D/F/G and 71M6542F/G Data Sheet
6.4.14 VREF
Table 109
148
Parameter
VREF output voltage,
VREF(22)
VREF output voltage,
VREF(22)
VREF output impedance
VREF power supply sensitivity
VREF input impedance
VREF chop step, trimmed
VNOM definition (see note 2)
VNOM temperature
coefficients:
VREF(T) deviation from
VNOM(T) (see note 1):
VREF aging
Notes:
VREF
1.
2.
3.
ΔVREF / ΔV3P3A
TC1 =
TC2 =
VNOM
(
T
)
Guaranteed by design; not production tested.
This relationship describes the nominal behavior of VREF at different temperatures, as governed by a
second order polynomial of 1
For the parameters in this table, unless otherwise specified, VREF_DIS = 0, PLL_FAST=1.
−
shows the performance specifications for the ADC reference voltage (VREF).
VNOM
(
T
)
(
T
)
10
62
6
Table 109: VREF Performance Specifications
st
T
PLL_FAST=0
VREF_CAL = 1,
I
V3P3A = 3.0 to 3.6 V
VREF_DIS = 1,
VREF = 1.3 V to 1.7 V
VREF(CHOP=01) −
VREF(CHOP=10)
VNOM
LOAD
and 2
A
= 22 ºC
= 10 µA, -10 µA
nd
(
T
order coefficients TC1 and TC2.
Condition
)
=
VREF
−
. 0
557
275
(
22
+
)
− 95
+
. 0
. 4
(
T
00028
−
⋅
22
TRIMT
1.193
)
Min
-1.5
100
-10
TC
-40
⋅
TRIMT
1
+
(
T
1.195
1.195
−
Typ
±25
0
22
)
2
TC
1.197
Max
2
+40
3.2
1.5
10
ppm/°C
µV/°C
µV/°C
mV/V
ppm/
Unit
year
mV
kΩ
kΩ
V
V
V
Rev 2
2
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