max5490pa02500-t Maxim Integrated Products, Inc., max5490pa02500-t Datasheet - Page 4

• Manufacturer Part Number: max5490pa02500-t
• Description: 100k? Precision-matched Resistor-divider In Sot23
• Manufacturer: Maxim Integrated Products, Inc.

100k Ω Precision-Matched Resistor-Divider in
SOT23
As shown in the Block Diagram, the MAX5490 consists
of two precision, low-ratio-drift resistors with an end-to-
end resistance of 100kΩ (R
of the divider. The maximum working voltage of the
MAX5490 is 80V. This device offers a wide range of
resistance ratios (R
for precision operational amplifier gain/attenuation con-
trol. A maximum initial ratio accuracy of 0.035% and a
low 1ppm/°C ratio drift enhance system accuracy.
Applying a voltage across terminals P1 and P2 causes
the device to heat up due to power dissipation. In high-
voltage applications, consider the error in resistance-
ratio temperature coefficient caused by self-heating.
4
(V
P1-P2
_______________________________________________________________________________________
PIN
1
2
3
= 10V, T
A
1000
100
Applications Information
= +25°C, unless otherwise noted.)
10
NAME
P1
P2
P3
1
1
/R
RATIO 1:1
SIGNAL CONNECTED TO P2
P1 GROUNDED
V
Detailed Description
2
P1-P2
) from 1:1 to 100:1 and is ideal
SPECTRAL NOISE DENSITY
= 2V
R
R
Set-Point Connection Terminal
Self-Heating and Error
1
2
1
10
FREQUENCY (Hz)
Connection Terminal
Connection Terminal
+ R
V
P1-P2
2
). P3 is the set point
= 10V
100
Typical Operating Characteristics (continued)
1k
The worst-case self-heating occurs when the operating
voltage attains its maximum value. Approximate the
result of power dissipation under this condition as:
The thermal resistance from junction to ambient, θ
for a 3-pin SOT23 package is 141°C/W. Calculate the
resulting temperature rise as:
If the ratio temperature coefficient is 1ppm/°C (typ), the
total error introduced by self-heating is:
0.0001
0.001
0.01
100
0.1
10
FUNCTION
1
10
P
DISS
1:1 RATIO
20Hz TO 20kHz BANDPASS
TOTAL HARMONIC DISTORTION
∆T = 64mW x 141°C/W = 9.02°C
9.02°C x 1ppm/°C = 9.02ppm
PLUS NOISE RESPONSE
100
=
FREQUENCY (Hz)
(
V
MAX
R
1k
)
2
=
10k
(
100
Pin Description
80
V
k
)
100k
Ω
2
=
64
mW
J-A
,