LT5400
1
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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
R1
LT5400-4
4.7pF
1
2
INPUTS
REF
3
+
4
8
7
6
5
5400 TA01a
R2
R3
R4
+
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
0
RELATIVE OCCURRENCE
5
10
15
20
30
5400 G01
25
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 8C
LT5400I ............................................... 40°C to 85°C
LT5400H ............................................ 40°C to 125°C
LT5400MP ......................................... 55°C to 150°C
Specified Temperature Range (Note 4)
LT5400C .................................................. 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 ................... 6C to 150°C
(Note 1)
TOP VIEW
MS8E PACKAGE
8-LEAD PLASTIC MSOP
R1
R2
R3
R4
1
2
3
4
8
7
6
5
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
3
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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 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
l
l
l
±0.010
±0.010
±0.0125
±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
pF
pF
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
<2
<4
ppm
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
2R2
R1 R3
R4
R1
R2
The resistor contribution to CMRR can then be calculated in the following
way:
CMRR = R/R
( )
CMRR
4R2
R1
2+R2
R1 +R3
R4
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
0
RELATIVE OCCURRENCE
5
10
15
20
30
5400 G01
25
TIME (HOURS)
0
CHANGE IN RESISTOR MATCHING (ppm)
1
3
5
400 800
5400 G02
–1
–3
0
2
4
–2
–4
–5 1200 1600 2000
LT5400
6
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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
R1
LT5400-4
4.7pF
1
2
INPUTS
REF
3
+
4
8
7
6
5
5400 TA02
R2
R3
R4
+
4.7pF
LT1468
LT5400-4
CMRR > 80dB AT 200kHz
THD < –120dB AT 1kHz, 20VP-P
R1
LT5400-4
2.048V
10µF
5V
5V
1
2
3
4
8
7
6
55400 TA03
R2
R3
R4
+
2.7µF
4.096V LT6200
LT C ®6655-4.096
R1
LT5400-2
1
2VIN
3
4
8
7
6
5
5400 TA04
R2
R3
R4
F
1.25V
+
F
5V
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
R1
LT5400-6
1
2
IN+
IN–
OUTPUT
5V
CMRRTYPICAL = 95.6dB
CMRRWORST-CASE ≈ 69.55dB
THE WORST-CASE VALUE IS GUARANTEED OVER OPERATING TEMPERATUE RANGE
+
3
4
8
7
6
5
5400 TA05
R2
R3
R4
+
LTC6362
R1
R2
R3
R4
+
R1
LT5400-4
1
2
5V
3
4
8
7
6
5
5400 TA06
R2
R3
R4
+
LTC6362
S
+
VOCM
1
2
VIN–
5V
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.
3
4
8
7
6
5
1/2
LT6011
+
C2, 0.1µF
+
VIN+
+
LT5400-3
1/2
LT6011
LT5400
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Typical applicaTions
Low Offset Current-Sense Amplifier
R1
R6
10k
R7
150Ω
C1
0.1µF
R2
R3
R4
5V
5400 TA07
LTC2053
E
+
VOUT
VOUT = ILOAD • 10k/150
1
2
* –1% VISHAY CRCW1206
AS LONG AS RD–RSENSE << R1 – R4, THE COMMON MODE REJECTION
WILL NOT BE DETERIORATED BY THE SENSE RESISTOR.
3
4
8
7
6
5
LT5400-3
+
+
REF
RSENSE
10Ω
RD*
10Ω
ILOAD
25V
LT5400
10
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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”
DETAIL “A”
GAUGE PLANE
1 2 34
4.90 ± 0.152
(.193 ± .006)
8
8
1
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”
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
11
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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
12
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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
R1
LT5400-4
1
2
IN+
OUTPUT
THD = –110dB AT 1kHz, 8VP-P
GROUNDING EXPOSED PAD RESULTS IN STABLE,
NO OVERSHOOT RESPONSE
+
3
4
8
7
6
5
5400 TA08
R2
R3
R4
+
LTC6362