Datasheet
MAX5491
Precision-Matched Resistor-Divider in SOT23
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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.
Voltage Between P1 and P2...................................................50V
Continuous Current into Any Pin....................................±1.75mA
Continuous Power Dissipation (T
A
= +70°C)
3-Pin SOT23 (derate 7.1mW/°C above +70°C).........571.4mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX5491_A, T
A
= +25°C ±0.035
MAX5491_B, T
A
= +25°C ±0.05
Initial Resistor Ratio Error (Note 2)
MAX5491_C, T
A
= +25°C ±0.1
%
1:1 ≤ ratio ≤ 3.2:1 2
3.2:1 < ratio ≤ 10:1 4
Resistance-Ratio Temperature
Coefficient (Note 3)
10:1 < ratio ≤ 30:1 5.5
ppm/°C
Absolute Temperature Coefficient
of Resistance
TCR (Note 4) 35 ppm/°C
Voltage Coefficient of Resistance VCR (Note 5) 0.1 ppm/V
End-to-End Resistance (R
1
+ R
2
) 28.5 30 31.5 kΩ
Continuous Current I
R1
, I
R2
±1.75 mA
Continuous Working Voltage
Between P1 and P2
V
P1-P2
050V
Power Rating 87.5 mW
Pin Capacitance 2pF
Resistance Ratio Long-Term
Stability
2000hr at +70°C ±0.03 %
Note 1: The MAX5491 is 100% production tested at T
A
= +25°C. Specifications over -40°C to +85°C are guaranteed by design.
Note 2: Testing conditions: T
A
= +25°C, V
P1-P2
= 9V and 50V.
Note 3: Resistance-ratio temperature coefficient is defined as
Note 4: Absolute TCR is defined as
and is tested at 9V and 50V.
Note 5: Resistance-ratio voltage coefficient is defined as
∆
∆
R
R
R
R
T
1
2
1
2
⎛
⎝
⎜
⎞
⎠
⎟
×
∆
∆
R
R
R
R
V
1
2
1
2
⎛
⎝
⎜
⎞
⎠
⎟
×
∆
∆
RR
RR T
12
12
+
()
+
()
×