71m6541g-igtr/f Maxim Integrated Products, Inc., 71m6541g-igtr/f Datasheet - Page 148

• Manufacturer Part Number: 71m6541g-igtr/f
• Description: 71m6541d/71m6541f/71m6542f Energy Meter Ics
• Manufacturer: Maxim Integrated Products, Inc.

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. 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
ΔVREF / ΔV3P3A
TC1 =
TC2 =
VNOM
(
T
)
governed by a second order polynomial of 1
−
shows the performance specifications for the ADC reference voltage (VREF).
VNOM
(
T
)
(
T
)
10
62
6
© 2008–2011 Teridian Semiconductor Corporation
Table 109: VREF Performance Specifications
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
A
= 22 ºC
= 10 µA, -10 µA
(
T
Condition
)
=
VREF
−
. 0
st
557
275
and 2
(
22
)
+
− 95
+
nd
. 0
. 4
(
T
order coefficients TC1 and TC2.
00028
−
⋅
22
TRIMT
1.193
)
Min
-1.5
100
TC
-10
-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
v1.1
2