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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 100kΩ. 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

MAX5490

100k

Ω

Precision-Matched Resistor-Divider in

SOT23

________________________________________________________________ Maxim Integrated Products 1

3 P3

MAX5490

SOT23

TOP VIEW

Pin Configuration

Ordering Information*

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.

PA R T

T EM P

R A N G E

PIN -

PA C K A G E

R A T IO

A C C U R A C Y

( % )

M AX 5490

_A_ _ _ _ _ - T- 55° C to + 125°C 3 S O T23- 3

0.035

M AX 5490_B_ _ _ _ _ - T- 55° C to + 125°C 3 S O T23- 3

0.05

M AX 5490_C _ _ _ _ _ - T- 55° C to + 125°C 3 S O T23- 3

0.1

Summary of content (8 pages)

PAGE 1
9-3337; Rev 2; 3/05 100kΩ Precision-Matched Resistor-Divider in SOT23 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-toend resistance of 100kΩ.
PAGE 2
MAX5490 100kΩ Precision-Matched Resistor-Divider in SOT23 ABSOLUTE MAXIMUM RATINGS Voltage Between P1 and P2.................................................100V Maximum Current into Any Pin ......................................±1.00mA Continuous Power Dissipation (TA = +70°C) 3-Pin SOT23 (derate 7.1mW/°C above +70°C).........571.4mW 3-Pin SOT23 (θJ-A) .....................................................141°C/W Operating Temperature Range .........................-55°C to +125°C Junction Temperature ...
PAGE 3
100kΩ Precision-Matched Resistor-Divider in SOT23 MAX5490 DC ELECTRICAL CHARACTERISTICS (continued) (TA = -55°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) ⎛R ⎞ ∆⎜ 1 ⎟ ⎝ R2 ⎠ R1 × ∆V R2 Note 5: Resistance-ratio voltage coefficient is defined as and is guaranteed by design, not production tested. 1 R ×R , where C = CP3 and R = 1 2 . 2πRC R1 + R2 Note 6: Calculate bandwidth by using Typical Operating Characteristics (VP1-P2 = 10V, TA = +25°C, unless otherwise noted.
PAGE 4
Typical Operating Characteristics (continued) (VP1-P2 = 10V, TA = +25°C, unless otherwise noted.) TOTAL HARMONIC DISTORTION PLUS NOISE RESPONSE SPECTRAL NOISE DENSITY RATIO 1:1 SIGNAL CONNECTED TO P2 P1 GROUNDED 1:1 RATIO 20Hz TO 20kHz BANDPASS 10 VP1-P2 = 10V MAX5490 toc07 100 MAX5490 toc06 1000 1 THD+N (%) NOISE (nV/√Hz) MAX5490 100kΩ Precision-Matched Resistor-Divider in SOT23 100 VP1-P2 = 2V 0.1 0.01 0.001 10 0.
PAGE 5
100kΩ Precision-Matched Resistor-Divider in SOT23 A = VOUT R = − 1 VIN R2 A = VOUT R = 1+ 1 VIN R2 IN OUT OUT P3 P3 MAX5490 P2 MAX5490 P2 P1 P1 IN R2 R2 R1 Figure 1. Inverting Amplifier Configuration Figure 2. Noninverting Amplifier Configuration IN IN A = R1 P1 VOUT R2 = VIN R1 + R2 P1 A = MAX5490 VOUT R2 = VIN R1 + R2 R1 P3 MAX5490 R1 R2 OUT P3 OUT R2 P2 P2 Figure 3. Buffered Attenuator Figure 4.
PAGE 6
100kΩ Precision-Matched Resistor-Divider in SOT23 MAX5490 How to Order PREFIX MAX 5490 V A 10000 -T ROOT PART NUMBER MAX5490 = 100kΩ end-to-end RATIO RANGE L through W. Resistor ratio must fall in the appropriate ratio range. (See Table 2.) RATIO ACCURACY A = 0.035% (max); B = 0.05% (max); C = 0.1% (max) RESISTANCE RATIO Five number ratio designator. Ratios available from 1:1 to 100:1. Format examples: 01000 = 1:1 02500 = 2.5:1 07538 = 7.
PAGE 7
100kΩ Precision-Matched Resistor-Divider in SOT23 MAX5490 Table 1. Standard Ratios* PART NUMBER RESISTOR RATIO RESISTOR-RATIO SUFFIX RESISTOR-RATIO ACCURACY (% MAX) TOP MARK MAX5490GA01000-T 1:1 01000 0.035 FZQG MAX5490GB01000-T 1:1 01000 0.05 FZQH MAX5490GC01000-T 1:1 01000 0.1 FZQI MAX5490MA02000-T 2:1 02000 0.035 FZRQ MAX5490MB02000-T 2:1 02000 0.05 FZRR MAX5490MC02000-T 2:1 02000 0.1 FZRS MAX5490TA05000-T 5:1 05000 0.035 FZQJ MAX5490TB05000-T 5:1 05000 0.
PAGE 8
Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) SOT23 L.EPS MAX5490 100kΩ Precision-Matched Resistor-Divider in SOT23 PACKAGE OUTLINE, 3L SOT-23 21-0051 F 1 1 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.