Operating Temperature Range .........................-55°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(T
A
= -55°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Initial Resistor Ratio Error (Note 2)
Resistance-Ratio Temperature
Coefficient (Note 3)
Absolute Temperature Coefficient
of Resistance
Voltage Coefficient of Resistance
End-to-End Resistance (R
1
+ R
2
)
Continuous Working Voltage
Between P1 and P2
Continuous Current
P1, P2, P3 Capacitance
Maximum Power Rating
Resistance Ratio Long-Term
Stability
-3dB Bandwidth
Thermal Noise
Current Noise
In accordance with MIL-STD-2020
method 30B
f
3dB
2000 hours at +70°C
1:1 ratio (Note 6)
V
P1-P2
I
R1
, I
R2
2
67.2
±0.03
3
45
-25
TCR
VCR
SYMBOL
CONDITIONS
MAX5490_A, T
A
= +25°C
MAX5490_B, T
A
= +25°C
MAX5490_C, T
A
= +25°C
1:1
≤
ratio
≤
10:1
10:1
≤
ratio
≤
25:1
(Note 4)
(Note 5)
T
A
= +25°C
95
-80
1
2
35
0.1
100
105
+80
840
MIN
TYP
MAX
±0.035
±0.05
±0.1
2
4
ppm/°C
ppm/°C
ppm/V
kΩ
V
µA
pF
mW
%
MHz
µV
RMS
dB
%
UNITS
Note 1:
The MAX5490 is 100% production tested at T
A
= +25°C. Specifications over -55°C to +125°C are guaranteed by design
and characterization.
Note 2:
Testing conditions: T
A
= +25°C, V
P1-P2
= 10V and 80V.
⎛
R
⎞
∆⎜
1
⎟
Note 3:
Resistance-ratio temperature coefficient is defined as
⎝
R
2
⎠
and is guaranteed by design, not production tested.
1 Introduction
In the mid-1960s, American scientist Maas conducted extensive experimental research on the charging process of open-cell batteries and proposed an acceptable charging curve for ...[详细]
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