MAX5492PB01500+T Maxim Integrated Products, MAX5492PB01500+T Datasheet - Page 5

• Manufacturer Part Number: MAX5492PB01500+T
• Description: Digital Potentiometer ICs IC RESISTOR DIV 10K n-Matched Resistor-D
• Manufacturer: Maxim Integrated Products

Specifications of MAX5492PB01500+T

• Resistance: 10 KOhms
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Mounting Style: SMD/SMT
• Supply Voltage (max): 40 V
• Package / Case: SOT-23-5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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.
The worst-case self-heating occurs when the operating
voltage attains its maximum value. Approximate the
result of power dissipation under this condition as:
Figure 1. Inverting Amplifier Configuration
Figure 3. Buffered Attenuator
IN
IN
P2
P
DISS
=
(
_______________________________________________________________________________________
V
R
MAX
2
R
)
2
P3
Self-Heating and Error
=
R
1
MAX5492
(
P2
P1
40
10
R
R
A
2
1
MAX5492
k
V
=
Ω
)
2
V
OUT
V
A
IN
=
=
P1
=
160
V
OUT
V
IN
R
1
P3
mW
R
+
= −
2
R
OUT
OUT
2
R
R
2
1
Resistor-Divider in SOT23
10kΩ Precision-Matched
The thermal resistance from junction to ambient, θ
for a 5-pin SOT23 package is 141°C/W. Calculate the
resulting temperature rise as:
If the ratio temperature coefficient is 1.5ppm/°C (typ),
the total error introduced by self-heating is:
Figure 2. Noninverting Amplifier Configuration
Figure 4. Attenuator with Buffer
IN
P2
∆T = 160mW x 141°C/W = 22.5°C
22.5°C x 1.5ppm/°C = 33.75ppm
P1
P2
R
R
2
1
MAX5492
IN
R
2
Typical Applications
P3
P3
R
1
A
MAX5492
=
V
OUT
V
IN
A
=
=
V
P1
R
OUT
V
1
IN
R
+
2
R
=
2
1
OUT
+
OUT
R
R
J-A
1
2
5
,