FDS 6531/6532 005
Data Sheet 71M6531D/F-71M6532D/F
5.4.13 Temperature Sensor
Table 82 shows the performance for the temperature sensor. The LSB values do not include the 8-bit left
shift at CE input.
Table 82: Temperature Sensor Performance Specifications
Parameter
Condition
Min
Typ
Max
Unit
Nominal relationship: N(T) = Sn*(T-Tn) + Nn, Tn = 25ºC
FIR_LEN[1:0]=0
(L=138)
FIR_LEN[1:0]=1
(L=288)
FIR_LEN[1:0]=2
(L=384)
Nominal Sensi-
tivity (Sn)4
-106
-964
-2286
[M40MHZ, M26MH] =
[00], [10], or [11]
3
L
S = −0.00109⋅
n
3
LSB/ºC
FIR_LEN[1:0]=0
(L=186)
-260
-2286
-8207
[M40MHZ, M26MHZ] = FIR_LEN[1:0]=1
[01]
(L=384)
FIR_LEN[1:0]=2
(L=588)
FIR_LEN[1:0]=0
(L=138)
[M40MHZ, M26MHZ] = FIR_LEN[1:0]=1
NominalOffset
(Nn) 4
49447
449446
1065353
3
L
[00], [10], or [11]
(L=288)
FIR_LEN[1:0]=2
(L=384)
N = 0.508⋅
n
3
LSB
FIR_LEN[1:0]=0
(L=186)
121071
1065353
3825004
[M40MHZ, M26MHZ] = FIR_LEN[1:0]=1
[01]
(L=384)
FIR_LEN[1:0]=2
(L=588)
Temperature Error 1
Tn = 25°C,
T = -40ºC to +85ºC
(N(T) − Nn )
-10
10
ºC
ERR = T −
Sn
Nn is measured at Tn during meter calibration and is stored in MPU or CE for use in temperature calcula-
tions.
5.4.14 VREF
Table 83 shows the performance specifications for VREF. Unless otherwise specified, VREF_DIS = 0.
Table 83: VREF Performance Specifications
Parameter
Condition
Ta = 22ºC
Min
Typ
Max
1.197
40
Unit
V
VREF output voltage, VREF(22)
VREF chop step
1.193
1.195
mV
VREF power supply sensitivity
V3P3A = 3.0 to 3.6 V
-1.5
100
1.5
mV/V
ΔVREF / ΔV3P3A
VREF_DIS = 1,
VREF = 1.3 to 1.7 V
VREF input impedance
VREF output impedance
VNOM definitiona
kΩ
CAL =1,
ILOAD = 10 µA, -10 µA
VNOM (T) = VREF(22) + (T − 22)TC1⋅10−6 + (T − 22)2 TC2⋅10−6
2.5
kΩ
V
v1.3
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