71M6521FE-IMR/F Maxim Integrated Products, 71M6521FE-IMR/F Datasheet - Page 62

• Manufacturer Part Number: 71M6521FE-IMR/F
• Description: IC ENERGY METER 32K FLASH 68-QFN
• Manufacturer: Maxim Integrated Products

Specifications of 71M6521FE-IMR/F

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 30 and Figure 31 show this concept graphically. The “box” from -18°C to +62°C reflects the fact that it is
impractical to measure the temperature coefficient of high-quality references at small temperature excursions. For
example, at +25°C, the expected error would be ±3°C * 40 PPM/°C, or just 0.012% for the regular-accuracy parts..
The maximum deviation of ±2520 PPM (or 0.252%) for the regular-accuracy parts is reached at the temperature
extremes. If the reference voltage is used to measure both voltage and current, the identical errors of ±0.252% add
up to a maximum Wh registration error of ±0.504%.
The maximum deviation of ±1260 PPM (or 0.126%) for the high-accuracy parts is reached at the temperature
extremes. If the reference voltage is used to measure both voltage and current, the identical errors of ±0.126% add
up to a maximum Wh registration error of ±0.252%.
Page: 62 of 107
Parameter
VREF(T) deviation from VNOM(T)
VREF
VNOM
(
T
)
−
VNOM
(
T
)
Figure 30: Error Band for VREF over Temperature (Regular-Accuracy Parts)
-1200
-1600
-2000
-2400
-2800
2800
2400
2000
1600
1200
-400
-800
(
800
400
T
0
)
-40
max(
Table 62: VREF Definition for the High-Accuracy Parts
T
10
−
Error Band (PPM) over Temperature (°C)
6
22
-20
,
40
)
Condition
0
±40 PPM/°C
±40 PPM/°C
20
40
Min
-20
60
71M6521DE/DH/FE Data Sheet
80
+20
Typ
PPM/ºC
Rev 2