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19-3337; Rev 2; 3/05
100k ? Precision-Matched Resistor-Divider in
SOT23
General Description
The MAX5490 precision resistor-divider consists of two
accurately matched resistors with access to the ends
and center of the divider. This device offers excellent
resistance matching of 0.035% (A grade), 0.05% (B
grade), and 0.1% (C grade). The MAX5490 provides an
extremely low resistance-ratio temperature drift of
1ppm/°C (typ) over -55°C to +125°C, and has an end-to-
end resistance of 100k ? . Resistance ratios from 1:1 to
100:1 are available. Five standard ratios are available
(see Table 1), and custom ratios are also available upon
request. The MAX5490 is ideal for precision gain-setting
applications where tight resistance matching and low
temperature drift are necessary.
The MAX5490 is available in a space-saving 3-pin
SOT23 package, and is guaranteed over the military
-55°C to +125°C temperature range.
Features
? Resistance Ratios from 1:1 to 100:1
? Custom Ratios Available Upon Request
? Tight Initial Ratio Accuracy
0.035% (MAX5490A)
0.05% (MAX5490B)
0.1% (MAX5490C)
? Low 1ppm/ ° C (typ) Resistor-Ratio-Drift
? Up to 80V Operating Voltage Across Sum of R1
and R2
? Tiny 3-Pin SOT23 Package
Industrial Process Control
Applications
Ordering Information*
Instrumentation
Precision Gain Setting
PART
TEMP
RANGE
PIN-
PACKAGE
RATIO
ACCURACY
(%)
Medical Equipment
Automatic Test Equipment
Base Stations
MAX5490 _ A _ _ _ _ _ -T -55°C to +125°C 3 SOT23-3
MAX5490 _ B _ _ _ _ _ -T -55°C to +125°C 3 SOT23-3
MAX5490 _ C _ _ _ _ _ -T -55°C to +125°C 3 SOT23-3
* See the How to Order section for more details.
0.035
0.05
0.1
Block Diagram
TOP VIEW
Pin Configuration
P1
MAX5490
R 1
P1
1
P2
R 2
P3
P2 2
MAX5490
SOT23
3
P3
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
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