MAX5490XA25000+T - Maxim Integrated

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

3P3

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- 30.035

M AX 5490_B_ _ _ _ _ - T- 55° C to + 125°C 3 S O T23- 30.05

M AX 5490_C _ _ _ _ _ - T- 55° C to + 125°C 3 S O T23- 30.1

MAX5490

100k

Ω

Precision-Matched Resistor-Divider in

SOT23

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(TA= -55°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

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......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MAX5490_A, TA = +25°C ±0.035

MAX5490_B, TA = +25°C ±0.05

Initial Resistor Ratio Error (Note 2)

MAX5490_C, TA = +25°C ±0.1

1:1 ≤ ratio ≤ 10:1 1 2

Resistance-Ratio Temperature

Coefficient (Note 3) 10:1 ≤ ratio ≤ 25:1 2 4 ppm/°C

Absolute Temperature Coefficient

of Resistance TCR (Note 4) 35 ppm/°C

Voltage Coefficient of Resistance VCR (Note 5) 0.1 ppm/V

End-to-End Resistance (R1 + R 2)T

A = +25°C 95 100 105 kΩ

Continuous Working Voltage

Between P1 and P2 VP1-P2 -80 +80 V

Continuous Current IR1, IR2 840 µA

P1, P2, P3 Capacitance 2pF

Maximum Power Rating 67.2 mW

Resistance Ratio Long-Term

Stability 2000 hours at +70°C±0.03 %

-3dB Bandwidth f3dB 1:1 ratio (Note 6) 3 MHz

Thermal Noise 45 µVRMS

Current Noise In accordance with MIL-STD-2020

method 30B -25 dB

Note 1: The MAX5490 is 100% production tested at TA= +25°C. Specifications over -55°C to +125°C are guaranteed by design

and characterization.

Note 2: Testing conditions: TA= +25°C, VP1-P2 = 10V and 80V.

Note 3: Resistance-ratio temperature coefficient is defined as

For ratios from 25:1 to 100:1, contact factory.

Note 4: Absolute TCR is defined as

∆

⎛

⎝

⎜⎞

⎠

⎟

∆

RR T

()

and is guaranteed by design, not production tested.

and is tested at 10V and 80V.

MAX5490

100k

Ω

Precision-Matched Resistor-Divider in

SOT23

_______________________________________________________________________________________ 3

9565-25 5 35

-20

-10

-30

-55 125

NORMALIZED RESISTANCE-RATIO DRIFT

vs. TEMPERATURE

MAX5490 toc01

TEMPERATURE (°C)

RATIO DRIFT (ppm)

VP1-P2 = 10V

RATIO 1:1

-80

-40

120

160

-120

9565-25 5 35-55 125

NORMALIZED RESISTANCE-RATIO DRIFT

vs. TEMPERATURE

MAX5490 toc02

TEMPERATURE (°C)

RATIO DRIFT (ppm)

VP1-P2 = 10V

RATIO 10:1

9565-25 5 35

-150

-100

-50

100

150

200

-200

-55 125

NORMALIZED RESISTANCE-RATIO DRIFT

vs. TEMPERATURE

MAX5490 toc03

TEMPERATURE (°C)

RATIO DRIFT (ppm)

VP1-P2 = 10V

RATIO 25:1

-0.04

-0.03

-0.02

-0.01

0.01

0.02

0.03

0.04

02040607010 30 50 80

RESISTANCE-RATIO ACCURACY

vs. VOLTAGE

MAX5490 toc04

VOLTAGE (V)

RATIO ACCURACY (%)

RATIO 25:1

0.1 101 100 1000

FREQUENCY RESPONSE

MAX5490 toc05

FREQUENCY (kHz)

RESPONSE (dB)

-18

-12

-9

-3

-15

-6

1:1 RATIO

CL = 10pF

Typical Operating Characteristics

(VP1-P2 = 10V, TA= +25°C, unless otherwise noted.)

Note 5: Resistance-ratio voltage coefficient is defined as

∆

⎛

⎝

⎜⎞

⎠

⎟

and is guaranteed by design, not production tested.

Note 6: Calculate bandwidth by using

2πRC ,

where C = CP3 and

RRR

=×

DC ELECTRICAL CHARACTERISTICS (continued)

(TA= -55°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

MAX5490

100k

Ω

Precision-Matched Resistor-Divider in

SOT23

4 _______________________________________________________________________________________

Detailed Description

As shown in the Block Diagram, the MAX5490 consists

of two precision, low-ratio-drift resistors with an end-to-

end resistance of 100kΩ(R1+ R2). P3 is the set point

of the divider. The maximum working voltage of the

MAX5490 is 80V. This device offers a wide range of

resistance ratios (R1/R2) from 1:1 to 100:1 and is ideal

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.

Applications Information

Self-Heating and Error

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:

The thermal resistance from junction to ambient, θJ-A,

for a 3-pin SOT23 package is 141°C/W. Calculate the

resulting temperature rise as:

∆T = 64mW x 141°C/W = 9.02°C

If the ratio temperature coefficient is 1ppm/°C (typ), the

total error introduced by self-heating is:

9.02°C x 1ppm/°C = 9.02ppm

kmW

DISS MAX

()

100 64

Ω

Pin Description

PIN NAME FUNCTION

1P1R

1 Connection Terminal

2P2R

2 Connection Terminal

3 P3 Set-Point Connection Terminal

1000

1 100 1k

100

FREQUENCY (Hz)

NOISE (nV/√Hz)

SPECTRAL NOISE DENSITY

MAX5490 toc06

RATIO 1:1

SIGNAL CONNECTED TO P2

P1 GROUNDED

VP1-P2 = 10V

VP1-P2 = 2V

100

0.1

0.01

0.001

0.0001

10 1k 10k100 100k

TOTAL HARMONIC DISTORTION

PLUS NOISE RESPONSE

MAX5490 toc07

FREQUENCY (Hz)

THD+N (%)

1:1 RATIO

20Hz TO 20kHz BANDPASS

Typical Operating Characteristics (continued)

(VP1-P2 = 10V, TA= +25°C, unless otherwise noted.)

MAX5490

100k

Ω

Precision-Matched Resistor-Divider in

SOT23

_______________________________________________________________________________________ 5

MAX5490

OUT

Figure 3. Buffered Attenuator

MAX5490

R2R1

OUT

Figure 1. Inverting Amplifier Configuration

MAX5490

OUT

Figure 4. Attenuator with Buffer

MAX5490

R2R1

OUT

Figure 2. Noninverting Amplifier Configuration

OUT

==−

OUT

==+11

OUT

Typical Applications

MAX5490

100k

Ω

Precision-Matched Resistor-Divider in

SOT23

6 _______________________________________________________________________________________

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 = 7.538:1

00000 = 100:1

TAPE AND REEL

How to Order

Example Part Numbers

PART NUMBER RESISTOR-RATIO RANGE

RESISTOR-RATIO

ACCURACY

(% MAX)

RESISTOR RATIO

MAX5490PA02500-T 2.000 to 2.999 0.035 2.5:1

MAX5490RB03000-T 3.000 to 3.999 0.05 3:1

MAX5490UA07538-T 7.538 to 9.999 0.035 7.538:1

MAX5490VC10000-T 10.000 to 19.999 0.1 10:1

MAX5490

100k

Ω

Precision-Matched Resistor-Divider in

SOT23

_______________________________________________________________________________________ 7

Table 2. Ratio Ranges

LETTER SUFFIX RESISTOR-RATIO RANGE

G 1.0 to 1.099

H 1.1 to 1.199

J 1.2 to 1.399

K 1.4 to 1.599

L 1.6 to 1.899

M 1.9 to 2.099

N 2.1 to 2.499

P 2.5 to 2.999

R 3.0 to 3.499

S 3.5 to 4.499

T 4.5 to 5.999

U 6.0 to 8.999

V 9.0 to 13.999

W 14.0 to 24.999

X 25.0 to 49.999

Y 50.0 to 74.999

Z 75.0 to 100.0

Chip Information

TRANSISTOR COUNT: 0

PROCESS: BiCMOS

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 0.05 FZQK

MAX5490TC05000-T 5:1 05000 0.1 FZQL

MAX5490VA10000-T 10:1 10000 0.035 FZQP

MAX5490VB10000-T 10:1 10000 0.05 FZQQ

MAX5490VC10000-T 10:1 10000 0.1 FZQR

MAX5490XA25000-T 25:1 25000 0.035 FZQV

MAX5490XB25000-T 25:1 25000 0.05 FZQW

MAX5490XC25000-T 25:1 25000 0.1 FZQX

*Standard ratios are available for ordering in any quantity. Nonstandard ratios are also available for values between 1:1 to 100:1.

A minimum order quantity of 10,000 units is required for nonstandard ratios. Please contact factory for more information.

MAX5490

100k

Ω

Precision-Matched Resistor-Divider in

SOT23

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

8_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

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

21-0051

PACKAGE OUTLINE, 3L SOT-23