71M6543G Maxim, 71M6543G Datasheet - Page 143

• Manufacturer Part Number: 71M6543G
• Description: The 71M6543F/71M6543H are Teridian's 4th-generation polyphase metering system-on-chips (SoCs) with a 5MHz, 8051-compatible MPU core, low-power real-time clock (RTC) with digital temperature compensation, flash memory, and LCD driver
• Manufacturer: Maxim

6.4.14 71M6543 VREF
Table 104
v1.2
Parameter
VREF output voltage,
VREF(22)
VREF output voltage,
VREF(22)
VREF chop step, trimmed
VREF power supply sensitivity
VREF input impedance
VREF output impedance
VNOM definition (see note 2)
VNOM temperature
coefficients:
VREF(T) deviation from
VNOM(T) (see note 1):
VNOM temperature
coefficients:
VREF(T) deviation from
VNOM(T) (see note 1):
VREF aging
Notes:
VREF
VREF
If temperature characterization trim information is not available (71M6543F and 71M6543G , 0.5%)
If temperature characterization trim information is available (71M6543H and 71M6543GH, 0.1%)
1. Guaranteed by design; not production tested.
2. This relationship describes the nominal behavior of VREF at different temperatures, as
3. For the parameters in this table, unless otherwise specified, VREF_DIS = 0, PLL_FAST=1
TC1 =
TC2 =
ΔVREF / ΔV3P3A
TC1 =
TC2 =
VNOM
VNOM
(
(
T
T
)
)
governed by a second order polynomial of 1
−
−
shows the performance specifications for the 71M6543 ADC reference voltage (VREF).
VNOM
VNOM
(
(
T
T
)
)
(
(
T
T
)
)
10
10
62
62
Table 104: 71M6543 VREF Performance Specifications
6
6
© 2008–2011 Teridian Semiconductor Corporation
T
PLL_FAST=0
VREF(CHOP=01) −
VREF(CHOP=10)
V3P3A = 3.0 to 3.6 V
VREF_DIS = 1,
VREF = 1.3 V to 1.7 V
VREF_CAL = 1,
I
VNOM
LOAD
A
= 22 ºC
35.091+0.01764∙TRIMT+1.587∙(TRIMBGB − TRIMBGD)
= 10 µA, -10 µA
(
T
Condition
)
=
VREF
−
−0.557 − 2.8 ∙ 10
. 0
st
557
275
and 2
(
22
)
+
− 95
+
71M6543F/H and 71M6543G/GH Data Sheet
nd
. 0
. 4
(
T
order coefficients TC1 and TC2.
00028
−
⋅
22
TRIMT
−4
1.193
)
Min
-1.5
100
-10
TC
-10
-40
⋅
∙ ����������
TRIMT
1
+
(
T
1.195
1.195
−
Typ
±25
22
)
2
TC
1.197
Max
2
+10
+40
1.5
3.2
10
ppm/°C
ppm/°C
µV/°C
µV/°C
µV/°C
µV/°C
mV/V
ppm/
Unit
year
mV
kΩ
kΩ
V
V
V
143
2
2