Datasheet

MAX6613
Detailed Description
The MAX6613 analog output temperature sensor’s out-
put voltage is a discrete function of its die temperature.
The maximum supply current is 13µA, and the supply
voltage range is from 2.5V to 5.5V for the -55°C to
+130°C temperature range, or 1.8V to 5.5V for the
+25°C to +130°C temperature range.
Transfer Function
The temperature-to-voltage transfer function is approxi-
mately linear and can be described by the quadratic
equation:
V
OUT
= -0.0000022
✕
T
2
- 0.01105
✕
T + 1.8455V
In many cases, a linear approximation can be applied:
V
OUT
= -0.01123
✕
T + 1.8455V
where T is the die temperature of the MAX6613 in °C.
Therefore:
T = (1.8455 - V
OUT
) / 0.01123V
Compatibility with Other Temperature
Sensors
The MAX6613 can be used to replace temperature sen-
sors using other output algorithms. Table 1 provides
information for a linear and quadratic output equation.
Contact the factory for performance information about
another equation.
Low-Voltage Analog Temperature
Sensor in an SC70 Package
4 _______________________________________________________________________________________
Table 1. Linear and Quadratic Output Equation
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
CC
= 2.7V, T
A
= -55°C 0.6 7.9
V
CC
= 2.7V, T
A
= -20°C -0.4 +5.8
V
CC
= 2.7V, T
A
= 0°C -0.9 +4.5
V
CC
= 2.7V, T
A
= +50°C -2.6 +3.0
V
CC
= 2.7V, T
A
= +85°C -3.6 +3.5
V
CC
= 2.7V, T
A
= +100°C -4.0 +3.7
V
CC
= 2.7V, T
A
= +125°C -4.8 +4.2
Temperature Error
Based on:
OUT = 1.8639 - 0.0115 x Temp
(Note 4)
V
CC
= 2.7V, T
A
= +130°C -5.1 +4.2
°C
V
CC
= 2.7V, T
A
= -55°C -0.4 +6.9
V
CC
= 2.7V, T
A
= -20°C -0.6 +5.7
V
CC
= 2.7V, T
A
= 0°C -0.9 +4.5
V
CC
= 2.7V, T
A
= +50°C -3.5 +2.1
V
CC
= 2.7V, T
A
= +85°C -6.1 +1.0
V
CC
= 2.7V, T
A
= +100°C -7.4 +0.4
V
CC
= 2.7V, T
A
= +125°C -10.1 -1.0
Temperature Error
Based on:
OUT = 1.8639 - 0.0115 x Temp -
0.00000388 x Temp
2
(Note 4)
V
CC
= 2.7V, T
A
= +130°C -10.8 -1.5
°C