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

Ω. 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.

Applications

Industrial Process Control

Instrumentation

Precision Gain Setting

Medical Equipment

Automatic Test Equipment

Base Stations

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

100k

SOT23

________________________________________________________________ Maxim Integrated Products

1

P2

1

3

P3

P1

MAX5490

SOT23

TOP VIEW

2

Pin Configuration

Ordering Information*

P1

P2

P3

MAX5490

Block Diagram

19-3337; Rev 2; 3/05

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.

*See the How to Order section for more details.

PART

TEMP

RANGE

PIN-

PACKAGE

RATIO

ACCURACY

(%)

0.035

0.05

0.1