Datasheet

MAX5491
Precision-Matched Resistor-Divider in SOT23
_______________________________________________________________________________________ 3
NORMALIZED RESISTOR-RATIO DRIFT
vs. TEMPERATURE
MAX5491 toc01
TEMPERATURE (°C)
RATIO DRIFT (ppm)
7550-25 0 25
-300
-200
-100
0
100
200
300
400
-400
-50 100
V
P1-P2
= 10V
RATIO = 1:1
NORMALIZED RESISTOR-RATIO DRIFT
vs. TEMPERATURE
MAX5491 toc02
TEMPERATURE (°C)
RATIO DRIFT (ppm)
7550-25 0 25
-300
-200
-100
0
100
200
300
400
-400
-50 100
V
P1-P2
= 10V
RATIO = 5:1
Typical Operating Characteristics
(V
P1-P2
= 10V, T
A
= +25°C, unless otherwise noted.)
Pin Description
PIN NAME FUNCTION
1P1R
1
Connection Terminal
2P2R
2
Connection Terminal
3 P3 Midpoint Between R
1
and R
2
Connection Terminals
Detailed Description
As shown in the Block Diagram, the MAX5491 consists
of two precision, low-ratio-drift resistors with an end-to-
end resistance of 30kΩ (R
1
+ R
2
). P3 is the center tap
of the divider. The maximum working voltage of the
MAX5491 is 50V. This device offers a wide range of
resistance ratios (R
1
/R
2
) from 1:1 to 30:1 and is ideally
suited for precision operational amplifier gain/attenua-
tion control. The MAX5491 features a ±2kV ESD protec-
tion that enhances system robustness. A maximum
initial ratio accuracy of 0.035% and a low 2ppm/°C ratio
drift enhance system accuracy.