Data Sheet 71M6531D/F-71M6532D/F
FDS 6531/6532 005
5.4.13 Temperature Sensor
shows the performance for the temperature sensor. The LSB values do not include the 8-bit left
shift at CE input.
Table 76: Temperature Sensor Performance Specifications
Parameter
Condition
Nominal relationship: N(T) = S
n
*(T-T
n
) + N
n
, T
n
= 25ºC
Nominal Sensi-
tivity (S
n
)
4
L
S
n
= −
0.00109
⋅
3
3
Min
Typ
-106
-964
-2286
-260
-2286
-8207
49447
449446
1065353
Max
Unit
LSB/ºC
[M40MHZ,
M26MH]
=
[00], [10], or [11]
[M40MHZ,
M26MHZ]
=
[01]
[M40MHZ,
M26MHZ]
=
[00], [10], or [11]
3
FIR_LEN=0
FIR_LEN=1
FIR_LEN=2
FIR_LEN=0
FIR_LEN=1
FIR_LEN=2
FIR_LEN=0
FIR_LEN=1
FIR_LEN=2
FIR_LEN=0
FIR_LEN=1
FIR_LEN=2
(L=138)
(L=288)
(L=384)
(L=186)
(L=384)
(L=588)
(L=138)
(L=288)
(L=384)
(L=186)
(L=384)
(L=588)
-10
NominalOffset
(N
n
)
4
LSB
L
N
n
=
0.508
⋅
3
[M40MHZ,
M26MHZ]
=
[01]
121071
1065353
3825004
Temperature Error
1
(
N
(
T
)
−
N
n
)
ERR
=
T
−
�½
S
n
T
n
= 25°C,
T = -40ºC to +85ºC
10
ºC
N
n
is measured at T
n
during meter calibration and is stored in MPU or CE for use in temperature calcula-
tions.
5.4.14 VREF
shows the performance specifications for VREF. Unless otherwise specified,
VREF_DIS
= 0.
Table 77: VREF Performance Specifications
Parameter
VREF output voltage, VREF(22)
VREF chop step
VREF power supply sensitivity
ΔVREF / ΔV3P3A
VREF input impedance
VREF output impedance
VNOM definition
a
Condition
Ta = 22ºC
V3P3A = 3.0 to 3.6 V
VREF_DIS
= 1,
VREF = 1.3 to 1.7 V
CAL =1,
I
LOAD
= 10 µA, -10 µA
Min
1.193
Typ
1.195
Max
1.197
40
1.5
Unit
V
mV
mV/V
kΩ
-1.5
100
2.5
kΩ
V
VNOM
(
T
)
=
VREF
(22)
+
(
T
−
22)
TC
1
⋅
10
−
6
+
(
T
−
22)
2
TC
2
⋅
10
−
6
VNOM temperature coefficients:
TC1
TC2
VREF(T) deviation from VNOM(T)
VREF
(
T
)
−
VNOM
(
T
)
10
6
VNOM
(
T
)
max(
T
−
22 ,40)
VREF aging
a
3.18·(52.46-TRIMT)
-0.444
-40
±25
+40
µV/ºC
µV/°C
2
PPM/ºC
PPM/
year
This relationship describes the nominal behavior of VREF at different temperatures.
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