LT5400AHMS8E-2#PBF - Linear Technology Corporation

LT5400

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Typical applicaTion

FeaTures DescripTion

Quad Matched

Resistor Network

The LT

5400 is a quad resistor network with excellent

matching specifications over the entire temperature range.

Matching is also specified when the LT5400 is configured

in a difference amplifier. This enhanced matching specifica-

tion guarantees CMRR performance to be up to 2× better

than independently matched resistors.

All four resistors can be accessed and biased independently,

making the LT5400 a convenient and versatile choice for

any application that can benefit from matched resistors.

These resistor networks provide precise ratiometric stability

required in highly accurate difference amplifiers, voltage

references and bridge circuits.

The LT5400 is available in a space-saving 8-pin MSOP

package, and is specified over the temperature range of

–55°C to 150°C.

Distribution of Matching Drift

applicaTions

n Excellent Matching

– A-Grade: 0.01% Matching

– B-Grade: 0.025% Matching

n 0.2ppm/°C Matching Temperature Drift

n ±75V Operating Voltage (±80V Abs Max)

n 8ppm/°C Absolute Resistor Value Temperature Drift

n Long-Term Stability: <2ppm at 2000 Hrs

n –55°C to 150°C Operating Temperature

n 8-Lead MSOP Package

n Difference Amplifier

n Reference Divider

n Precision Summing /Subtracting

LT5400-4

4.7pF

INPUTS

REF

–

5400 TA01a

–

4.7pF

LT1468

LT5400-4

CMRR > 80dB AT 200kHz

THD < –120dB AT 1kHz, 20VP-P

Difference Amplifier

ppm/°C

–1 –0.8–0.6–0.4–0.2 0 0.2 0.4 0.6 0.8 1

RELATIVE OCCURRENCE

5400 G01

L, LT , LT C , LT M , Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

LT5400

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pin conFiguraTionabsoluTe MaxiMuM raTings

Total Voltage (Across Any 2 Pins) (Note 2).……….±80V

Power Dissipation (Each Resistor) (Note 3) ....... 800mW

Operating Temperature Range (Note 4)

LT5400C .............................................. –40°C to 85°C

LT5400I ............................................... –40°C to 85°C

LT5400H ............................................ –40°C to 125°C

LT5400MP ......................................... –55°C to 150°C

Specified Temperature Range (Note 4)

LT5400C .................................................. 0°C to 70°C

LT5400I ............................................... –40°C to 85°C

LT5400H ............................................ –40°C to 125°C

LT5400MP ......................................... –55°C to 150°C

Maximum Junction Temperature .......................... 150°C

Storage Temperature Range ................... –65°C to 150°C

(Note 1)

TOP VIEW

MS8E PACKAGE

8-LEAD PLASTIC MSOP

θJA = 40°C/W, θJC = 10°C/W

EXPOSED PAD (PIN 9) IS FLOATING

available opTions

orDer inForMaTion

PART NUMBER R2 = R3 (Ω) R1 = R4 (Ω) RESISTOR RATIO

LT5400-1 10k 10k 1:1

LT5400-2 100k 100k 1:1

LT5400-3 10k 100k 1:10

LT5400-4 1k 1k 1:1

LT5400-5 1M 1M 1:1

LT5400-6 1k 5k 1:5

LT5400-7 1.25k 5k 1:4

LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE

LT5400ACMS8E-1#PBF LT5400ACMS8E-1#TRPBF LTFVR 8-Lead Plastic MSOP 0°C to 70°C

LT5400BCMS8E-1#PBF LT5400BCMS8E-1#TRPBF LTFVR 8-Lead Plastic MSOP 0°C to 70°C

LT5400AIMS8E-1#PBF LT5400AIMS8E-1#TRPBF LTFVR 8-Lead Plastic MSOP –40°C to 85°C

LT5400BIMS8E-1#PBF LT5400BIMS8E-1#TRPBF LTFVR 8-Lead Plastic MSOP –40°C to 85°C

LT5400AHMS8E-1#PBF LT5400AHMS8E-1#TRPBF LTFVR 8-Lead Plastic MSOP –40°C to 125°C

LT5400BHMS8E-1#PBF LT5400BHMS8E-1#TRPBF LTFVR 8-Lead Plastic MSOP –40°C to 125°C

LT5400BMPMS8E-1#PBF LT5400BMPMS8E-1#TRPBF LTFVR 8-Lead Plastic MSOP –55°C to 150°C

LT5400

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orDer inForMaTion

LT5400ACMS8E-2#PBF LT5400ACMS8E-2#TRPBF LTGBG 8-Lead Plastic MSOP 0°C to 70°C

LT5400BCMS8E-2#PBF LT5400BCMS8E-2#TRPBF LTGBG 8-Lead Plastic MSOP 0°C to 70°C

LT5400AIMS8E-2#PBF LT5400AIMS8E-2#TRPBF LTGBG 8-Lead Plastic MSOP –40°C to 85°C

LT5400BIMS8E-2#PBF LT5400BIMS8E-2#TRPBF LTGBG 8-Lead Plastic MSOP –40°C to 85°C

LT5400AHMS8E-2#PBF LT5400AHMS8E-2#TRPBF LTGBG 8-Lead Plastic MSOP –40°C to 125°C

LT5400BHMS8E-2#PBF LT5400BHMS8E-2#TRPBF LTGBG 8-Lead Plastic MSOP –40°C to 125°C

LT5400BMPMS8E-2#PBF LT5400BMPMS8E-2#TRPBF LTGBG 8-Lead Plastic MSOP –55°C to 150°C

LT5400ACMS8E-3#PBF LT5400ACMS8E-3#TRPBF LTGBH 8-Lead Plastic MSOP 0°C to 70°C

LT5400BCMS8E-3#PBF LT5400BCMS8E-3#TRPBF LTGBH 8-Lead Plastic MSOP 0°C to 70°C

LT5400AIMS8E-3#PBF LT5400AIMS8E-3#TRPBF LTGBH 8-Lead Plastic MSOP –40°C to 85°C

LT5400BIMS8E-3#PBF LT5400BIMS8E-3#TRPBF LTGBH 8-Lead Plastic MSOP –40°C to 85°C

LT5400AHMS8E-3#PBF LT5400AHMS8E-3#TRPBF LTGBH 8-Lead Plastic MSOP –40°C to 125°C

LT5400BHMS8E-3#PBF LT5400BHMS8E-3#TRPBF LTGBH 8-Lead Plastic MSOP –40°C to 125°C

LT5400BMPMS8E-3#PBF LT5400BMPMS8E-3#TRPBF LTGBH 8-Lead Plastic MSOP –55°C to 150°C

LT5400ACMS8E-4#PBF LT5400ACMS8E-4#TRPBF LTGCF 8-Lead Plastic MSOP 0°C to 70°C

LT5400BCMS8E-4#PBF LT5400BCMS8E-4#TRPBF LTGCF 8-Lead Plastic MSOP 0°C to 70°C

LT5400AIMS8E-4#PBF LT5400AIMS8E-4#TRPBF LTGCF 8-Lead Plastic MSOP –40°C to 85°C

LT5400BIMS8E-4#PBF LT5400BIMS8E-4#TRPBF LTGCF 8-Lead Plastic MSOP –40°C to 85°C

LT5400AHMS8E-4#PBF LT5400AHMS8E-4#TRPBF LTGCF 8-Lead Plastic MSOP –40°C to 125°C

LT5400BHMS8E-4#PBF LT5400BHMS8E-4#TRPBF LTGCF 8-Lead Plastic MSOP –40°C to 125°C

LT5400BMPMS8E-4#PBF LT5400BMPMS8E-4#TRPBF LTGCF 8-Lead Plastic MSOP –55°C to 150°C

LT5400ACMS8E-5#PBF LT5400ACMS8E-5#TRPBF LTGCG 8-Lead Plastic MSOP 0°C to 70°C

LT5400BCMS8E-5#PBF LT5400BCMS8E-5#TRPBF LTGCG 8-Lead Plastic MSOP 0°C to 70°C

LT5400AIMS8E-5#PBF LT5400AIMS8E-5#TRPBF LTGCG 8-Lead Plastic MSOP –40°C to 85°C

LT5400BIMS8E-5#PBF LT5400BIMS8E-5#TRPBF LTGCG 8-Lead Plastic MSOP –40°C to 85°C

LT5400BCMS8E-6#PBF LT5400BCMS8E-6#TRPBF LTGCK 8-Lead Plastic MSOP 0°C to 70°C

LT5400BIMS8E-6#PBF LT5400BIMS8E-6#TRPBF LTGCK 8-Lead Plastic MSOP –40°C to 85°C

LT5400BHMS8E-6#PBF LT5400BHMS8E-6#TRPBF LTGCK 8-Lead Plastic MSOP –40°C to 125°C

LT5400BMPMS8E-6#PBF LT5400BMPMS8E-6#TRPBF LTGCK 8-Lead Plastic MSOP –55°C to 150°C

LT5400BCMS8E-7#PBF LT5400BCMS8E-7#TRPBF LTGFT 8-Lead Plastic MSOP 0°C to 70°C

LT5400BIMS8E-7#PBF LT5400BIMS8E-7#TRPBF LTGFT 8-Lead Plastic MSOP –40°C to 85°C

LT5400BHMS8E-7#PBF LT5400BHMS8E-7#TRPBF LTGFT 8-Lead Plastic MSOP –40°C to 125°C

LT5400BMPMS8E-7#PBF LT5400BMPMS8E-7#TRPBF LTGFT 8-Lead Plastic MSOP –55°C to 150°C

Consult LT C Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

Consult LT C Marketing for information on non-standard lead based finish parts.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/

LT5400

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elecTrical characTerisTics

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The instantaneous difference between the highest voltage applied

to any pin and the lowest voltage applied to any other pin should not

exceed the Absolute Maximum Rating. This includes the voltage across

any resistor, the voltage across any pin with respect to the exposed pad of

the package, and the voltage across any two unrelated pins.

Note 3: In order to keep the junction temperature within the Absolute

Maximum Rating, maximum power dissipation should be derated at

elevated ambient temperatures.

Note 4: The LT5400C is guaranteed functional over the operating

temperature range of –40°C to 85°C. The LT5400C is designed,

characterized and expected to meet specified performance from –40°C to

85°C but is not tested or QA sampled at these temperatures. The LT5400I

is guaranteed to meet specified performance from –40°C to 85°C. The

LT5400H is guaranteed to meet specified performance from –40°C to

125°C and is 100% tested at these temperature extremes. The LT5400MP

is guaranteed to meet specified performance from –55°C to 150°C and is

100% tested at these temperature extremes.

The l denotes the specifications which apply over the full specified

temperature range, otherwise specifications are at TA = 25°C.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

∆R/R Resistor Matching Ratio (Any Resistor to Any Other

Resistor)

A-Grade

TA = 0°C to 70°C

TA = –40°C to 85°C

TA = –40°C to 125°C

±0.010

±0.0125

B-Grade l±0.025 %

(∆R/R)CMRR Matching for CMRR A-Grade (Note 6) l±0.005 %

B-Grade (Note 6) l±0.015 %

(∆R/R)/∆TResistor Matching Ratio Temperature Drift (Note 5) l±0.2 ±1 ppm/°C

Resistor Voltage Coefficient l<0.1 ppm/V

Excess Current Noise Mil-Std-202 Method 308 <–55 dB

∆RAbsolute Resistor Tolerance A-Grade l±7.5 %

B-Grade l±15 %

Distributed Capacitance Resistor to Exposed Pad

Resistor to Resistor

5.5

1.4

∆R/∆TAbsolute Resistor Value Temperature Drift (Note 5) l–10 8 25 ppm/°C

Resistor Matching Ratio Long-Term Drift 35°C 2000Hours, 10mW

70°C 2000Hours, 10mW

ppm

Resistor Matching Ratio Moisture Resistance 85°C 85%R.H. 168Hours <2 ppm

Resistor Matching Ratio Thermal Shock/Hysteresis –50°C to 150°C, 5 Cycles <3 ppm

Resistor Matching Ratio IR Reflow 25°C to 260°C, 3 Cycles <3 ppm

Resistor Matching Ratio Accelerated Shelf Life 150°C, 1000Hours 10 ppm

Harmonic Distortion 20VP-P, 1kHz, Difference Amplifier –120 dBc

Shelf Life 25°C, Unbiased, 1 Year ±5 ppm

Note 5: This parameter is not 100% tested.

Note 6: (∆R/R)CMRR (Matching for CMRR) is a metric for the contribution

of error from the LT5400 when used in a difference configuration using

the specific resistor pairs of R1/R2 and R4/R3. See Difference Amplifier,

Instrumentation Amplifier, and Differential Amplifier circuits in the Typical

Applications section for examples.

∆R/R

( )

CMRR =1

2•R2

R1 –R3









•R1











The resistor contribution to CMRR can then be calculated in the following

way:

CMRR = ∆R/R

( )

CMRR •

4•R2

2+R2

R1 +R3













For LT5400 options with resistor ratio 1:1, the resistor contribution to

CMRR can be simplified:

CMRR ≈ (∆R/R)CMRR

LT5400

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Typical perForMance characTerisTics

Distribution of Matching Drift Change in Matching vs Time

ppm/°C

–1 –0.8–0.6–0.4–0.2 0 0.2 0.4 0.6 0.8 1

RELATIVE OCCURRENCE

5400 G01

TIME (HOURS)

CHANGE IN RESISTOR MATCHING (ppm)

400 800

5400 G02

–1

–3

–2

–4

–5 1200 1600 2000

LT5400

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applicaTions inForMaTion

Where to Connect the Exposed Pad

The exposed pad is not DC connected to any resistor

terminal. Its main purpose is to reduce the internal tem-

perature rise when the application calls for large amounts

of dissipated power in the resistors. The exposed pad can

be tied to any voltage (such as ground) as long as the

absolute maximum ratings are observed.

There is capacitive coupling between the resistors and the

exposed pad, as specified in the Electrical Characteristics

table. To avoid interference, do not tie the exposed pad to

noisy signals or noisy grounds.

Connecting the exposed pad to a quiet AC ground is

recommended as it acts as an AC shield and reduces the

amount of resistor-resistor capacitance.

Thermal Considerations

Each resistor is rated for relatively high power dissipation,

as listed in the Absolute Maximum Ratings section of

this data sheet. To calculate the internal temperature rise

inside the package, add together the power dissipated in

all of the resistors, and multiply by the thermal resistance

coefficient of the package (θJA or θJC as applicable).

For example, if each resistor dissipates 250mW, for a

total of 1W, the total temperature rise inside the package

equals 40°C. All 4 resistors will be at the same temperature,

regardless of which resistor dissipates more power. The

junction temperature must be kept within the Absolute

Maximum Rating. At elevated ambient temperatures, this

places a limit on the maximum power dissipation.

In addition to limiting the maximum power dissipation,

the maximum voltage across any two pins must also be

kept less than the absolute maximum rating.

ESD

The LT5400 can withstand up to ±1kV of electrostatic

discharge (ESD, human body). To achieve the highest

precision matching, the LT5400 is designed without explicit

ESD internal protection diodes. ESD beyond this voltage

can damage or degrade the device including causing

pin-to-pin shorts.

To protect the LT5400 against large ESD strikes, external

protection can be added using diodes to the circuit supply

rails or bidirectional Zeners to ground (Figure 1).

LT5400

EXTERNAL

CONNECTOR

BAV99

V+

V–

LT5400

UMZ36K

5400 F01

EXTERNAL

CONNECTOR

Figure 1

Matching Specification

The LT5400 specifies matching in the most conservative

possible way. In each device, the ratio error of the largest

of the four resistors to the smallest of the four resistors

meets the specified matching level. Looser definitions

would compare each resistor value to the average of the

resistor values, which would typically result in specifica-

tions that appear twice as good as they are per the LT5400’s

more conservative definition. The following two examples

illustrate this point.

In an inverting gain-of-1 amplifier, if the largest resistor

is allowed to deviate only 0.01% from the smallest resis-

tor, then the worst-case gain can be –1.00005/0.99995 =

–1.0001, which is a 0.01% error from the ideal –1.0000.

That is the LT5400 definition. In a looser definition, if each

resistor would be allowed to deviate by 0.01% from the

average, then the worst-case gain could be –1.0001/0.9999

= –1.0002, which is a 0.02% error from the ideal –1.0000.

In a divide-by-2 resistor divider network, if the largest

resistor is allowed to deviate only 0.01% from the smallest

resistor, then the worst-case ratio can be 1.00005/(1.00005

+ 0.99995) = 0.500025, which is a 0.005% error from the

ideal 0.50000. That is the LT5400 definition. In a looser

definition, if each resistor would be allowed to deviate by

0.01% from the average, then the worst-case ratio could

be 1.0001/(1.0001 + 0.9999) = 0.50005, which is a 0.01%

error from the ideal 0.50000.

LT5400

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Typical applicaTions

Difference Amplifier

Low Noise Reference Divider with Op Amp Input Bias Current Balancing

Micropower Reference Divide-by-4

LT5400-4

4.7pF

INPUTS

REF

–

5400 TA02

–

4.7pF

LT1468

LT5400-4

CMRR > 80dB AT 200kHz

THD < –120dB AT 1kHz, 20VP-P

LT5400-4

2.048V

10µF

55400 TA03

–

2.7µF

4.096V LT6200

LT C ®6655-4.096

LT5400-2

2VIN

5400 TA04

1µF

1.25V

–

1µF

VIN

5.5V TO 36V

LT1638

LT6654-5

LT5400

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Typical applicaTions

Gain of 5, Fully-Differential Amplifier

Gain of 10, 106dB CMRR, Discrete Component,

Fully-Differential Instrumentation Amplifier

LT5400-6

IN+

IN–

OUTPUT

CMRRTYPICAL = 95.6dB

CMRRWORST-CASE ≈ 69.55dB

THE WORST-CASE VALUE IS GUARANTEED OVER OPERATING TEMPERATUE RANGE

–

5400 TA05

–

LTC6362

–

LT5400-4

5400 TA06

–

LTC6362

–

VOCM

VIN–

THE LT5400-3 COULD BE REPLACED BY 1% (OR BETTER) DISCRETE

RESISTORS AT THE COST OF SOME CMRR. THE INPUT STAGE IS LESS

SENSITIVE TO RESISTOR ERRORS THAN THE UNITY GAIN STAGE.

1/2

LT6011

–

C2, 0.1µF

–

VIN+

–

LT5400-3

1/2

LT6011

LT5400

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Typical applicaTions

Low Offset Current-Sense Amplifier

10k

150Ω

0.1µF

5400 TA07

LTC2053

–

VOUT

VOUT = ILOAD • 10k/150

* –1% VISHAY CRCW1206

AS LONG AS RD–RSENSE << R1 – R4, THE COMMON MODE REJECTION

WILL NOT BE DETERIORATED BY THE SENSE RESISTOR.

LT5400-3

–

REF

RSENSE

10Ω

RD*

10Ω

ILOAD

25V

LT5400

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MS8E Package

8-Lead Plastic MSOP, Exposed Die Pad

(Reference LTC DWG # 05-08-1662 Rev I)

MSOP (MS8E) 0910 REV I

0.53 ± 0.152

(.021 ± .006)

SEATING

PLANE

NOTE:

1. DIMENSIONS IN MILLIMETER/(INCH)

2. DRAWING NOT TO SCALE

3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.

MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE

4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.

INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE

5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX

6. EXPOSED PAD DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH ON E-PAD

SHALL NOT EXCEED 0.254mm (.010") PER SIDE.

0.18

(.007)

0.254

(.010)

1.10

(.043)

MAX

0.22 – 0.38

(.009 – .015)

TYP

0.86

(.034)

REF

0.65

(.0256)

BSC

0° – 6° TYP

DETAIL “A”

GAUGE PLANE

1 2 34

4.90 ± 0.152

(.193 ± .006)

BOTTOM VIEW OF

EXPOSED PAD OPTION

765

3.00 ± 0.102

(.118 ± .004)

(NOTE 3)

3.00 ± 0.102

(.118 ± .004)

(NOTE 4)

0.52

(.0205)

REF

1.68

(.066)

1.88

(.074)

5.23

(.206)

MIN

3.20 – 3.45

(.126 – .136)

1.68 ± 0.102

(.066 ± .004)

1.88 ± 0.102

(.074 ± .004) 0.889 ± 0.127

(.035 ± .005)

RECOMMENDED SOLDER PAD LAYOUT

0.65

(.0256)

BSC

0.42 ± 0.038

(.0165 ± .0015)

TYP

0.1016 ± 0.0508

(.004 ± .002)

DETAIL “B”

CORNER TAIL IS PART OF

THE LEADFRAME FEATURE.

FOR REFERENCE ONLY

NO MEASUREMENT PURPOSE

0.05 REF

0.29

REF

package DescripTion

Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.

LT5400

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Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

revision hisTory

REV DATE DESCRIPTION PAGE NUMBER

A 8/11 Added LT5400-4, LT5400-5, LT5400-6. Changes reflected throughout the data sheet. 1-10

B 7/12 Added LT5400-3 H-grade and MP-grade and LT5400-7. 2, 3

Added Shelf Life characteristics. 4

Clarified Note 6. 4

Added application schematics. 8, 9

LT5400

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Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com

 LINEAR TECHNOLOGY CORPORATION 2011

LT 0712 REV B • PRINTED IN USA

relaTeD parTs

Typical applicaTion

PART NUMBER DESCRIPTION COMMENTS

LT1991 Precision Difference Amplifier 0.04% Resistor Matching,100µA Op Amp

LT1990 High Voltage Difference Amplifier ±250V Input Range

LT1167 Instrumentation Amplifier >90dB CMRR

Precision Single-Ended to Differential Conversion

LT5400-4

IN+

OUTPUT

THD = –110dB AT 1kHz, 8VP-P

GROUNDING EXPOSED PAD RESULTS IN STABLE,

NO OVERSHOOT RESPONSE

–

5400 TA08

–

LTC6362