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.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
n
n
n
n
n
n
Excellent Matching
n
A-Grade: 0.01% Matching
n
B-Grade: 0.025% Matching
0.2ppm/°C Matching Temperature Drift
±75V Operating Voltage (±80V Abs Max)
8ppm/°C Absolute Resistor Value Temperature Drift
Long-Term Stability: <2ppm at 2000 Hrs
–55°C to 150°C Operating Temperature
8-Lead MSOP Package
applicaTions
n
n
n
Difference Amplifier
Reference Divider
Precision Summing /Subtracting
Typical applicaTion
Difference Amplifier
4.7pF
30
25
1
INPUTS
REF
LT5400-4 R1
R2
R3
R4
RELATIVE OCCURRENCE
8
7
6
5
20
15
10
5
0
Distribution of Matching Drift
–
+
2
3
4
–
LT1468
+
LT5400-4
CMRR > 80dB AT 200kHz
THD < –120dB AT 1kHz, 20V
P-P
4.7pF
5400 TA01a
–1 –0.8–0.6–0.4–0.2 0 0.2 0.4 0.6 0.8 1
ppm/°C
5400 G01
5400fc
For more information
www.linear.com/LT5400
1
LT5400
absoluTe MaxiMuM raTings
(Note 1)
pin conFiguraTion
TOP VIEW
1
2
3
4
R1
R2
R3
R4
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
8
7
6
5
MS8E PACKAGE
8-LEAD PLASTIC MSOP
θ
JA
= 40°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 9) IS FLOATING
available opTions
PART NUMBER
LT5400-1
LT5400-2
LT5400-3
LT5400-4
LT5400-5
LT5400-6
LT5400-7
LT5400-8
R2 = R3 (Ω)
10k
100k
10k
1k
1M
1k
1.25k
1k
R1 = R4 (Ω)
10k
100k
100k
1k
1M
5k
5k
9k
RESISTOR RATIO
1:1
1:1
1:10
1:1
1:1
1:5
1:4
1:9
orDer inForMaTion
LEAD FREE FINISH
LT5400ACMS8E-1#PBF
LT5400BCMS8E-1#PBF
LT5400AIMS8E-1#PBF
LT5400BIMS8E-1#PBF
LT5400AHMS8E-1#PBF
LT5400BHMS8E-1#PBF
LT5400BMPMS8E-1#PBF
TAPE AND REEL
LT5400ACMS8E-1#TRPBF
LT5400BCMS8E-1#TRPBF
LT5400AIMS8E-1#TRPBF
LT5400BIMS8E-1#TRPBF
LT5400AHMS8E-1#TRPBF
LT5400BHMS8E-1#TRPBF
LT5400BMPMS8E-1#TRPBF
PART MARKING*
LTFVR
LTFVR
LTFVR
LTFVR
LTFVR
LTFVR
LTFVR
PACKAGE DESCRIPTION
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
SPECIFIED TEMPERATURE RANGE
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
2
5400fc
For more information
www.linear.com/LT5400
LT5400
orDer inForMaTion
LT5400ACMS8E-2#PBF
LT5400BCMS8E-2#PBF
LT5400AIMS8E-2#PBF
LT5400BIMS8E-2#PBF
LT5400AHMS8E-2#PBF
LT5400BHMS8E-2#PBF
LT5400BMPMS8E-2#PBF
LT5400ACMS8E-3#PBF
LT5400BCMS8E-3#PBF
LT5400AIMS8E-3#PBF
LT5400BIMS8E-3#PBF
LT5400AHMS8E-3#PBF
LT5400BHMS8E-3#PBF
LT5400BMPMS8E-3#PBF
LT5400ACMS8E-4#PBF
LT5400BCMS8E-4#PBF
LT5400AIMS8E-4#PBF
LT5400BIMS8E-4#PBF
LT5400AHMS8E-4#PBF
LT5400BHMS8E-4#PBF
LT5400BMPMS8E-4#PBF
LT5400ACMS8E-5#PBF
LT5400BCMS8E-5#PBF
LT5400AIMS8E-5#PBF
LT5400BIMS8E-5#PBF
LT5400BCMS8E-6#PBF
LT5400BIMS8E-6#PBF
LT5400BHMS8E-6#PBF
LT5400BMPMS8E-6#PBF
LT5400BCMS8E-7#PBF
LT5400BIMS8E-7#PBF
LT5400BHMS8E-7#PBF
LT5400BMPMS8E-7#PBF
LT5400BCMS8E-8#PBF
LT5400BIMS8E-8#PBF
LT5400BHMS8E-8#PBF
LT5400BMPMS8E-8#PBF
LT5400ACMS8E-2#TRPBF
LT5400BCMS8E-2#TRPBF
LT5400AIMS8E-2#TRPBF
LT5400BIMS8E-2#TRPBF
LT5400AHMS8E-2#TRPBF
LT5400BHMS8E-2#TRPBF
LT5400BMPMS8E-2#TRPBF
LT5400ACMS8E-3#TRPBF
LT5400BCMS8E-3#TRPBF
LT5400AIMS8E-3#TRPBF
LT5400BIMS8E-3#TRPBF
LT5400AHMS8E-3#TRPBF
LT5400BHMS8E-3#TRPBF
LT5400BMPMS8E-3#TRPBF
LT5400ACMS8E-4#TRPBF
LT5400BCMS8E-4#TRPBF
LT5400AIMS8E-4#TRPBF
LT5400BIMS8E-4#TRPBF
LT5400AHMS8E-4#TRPBF
LT5400BHMS8E-4#TRPBF
LT5400BMPMS8E-4#TRPBF
LT5400ACMS8E-5#TRPBF
LT5400BCMS8E-5#TRPBF
LT5400AIMS8E-5#TRPBF
LT5400BIMS8E-5#TRPBF
LT5400BCMS8E-6#TRPBF
LT5400BIMS8E-6#TRPBF
LT5400BHMS8E-6#TRPBF
LT5400BMPMS8E-6#TRPBF
LT5400BCMS8E-7#TRPBF
LT5400BIMS8E-7#TRPBF
LT5400BHMS8E-7#TRPBF
LT5400BMPMS8E-7#TRPBF
LT5400BCMS8E-8#TRPBF
LT5400BIMS8E-8#TRPBF
LT5400BHMS8E-8#TRPBF
LT5400BMPMS8E-8#TRPBF
LTGBG
LTGBG
LTGBG
LTGBG
LTGBG
LTGBG
LTGBG
LTGBH
LTGBH
LTGBH
LTGBH
LTGBH
LTGBH
LTGBH
LTGCF
LTGCF
LTGCF
LTGCF
LTGCF
LTGCF
LTGCF
LTGCG
LTGCG
LTGCG
LTGCG
LTGCK
LTGCK
LTGCK
LTGCK
LTGFT
LTGFT
LTGFT
LTGFT
LTGTB
LTGTB
LTGTB
LTGTB
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
8-Lead Plastic MSOP
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
0°C to 70°C
0°C to 70°C
–40°C to 85°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
–55°C to 150°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
–55°C to 150°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
–55°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC 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/
5400fc
For more information
www.linear.com/LT5400
3
LT5400
elecTrical characTerisTics
SYMBOL
∆R/R
PARAMETER
The
l
denotes the specifications which apply over the full specified
temperature range, otherwise specifications are at T
A
= 25°C.
CONDITIONS
l
l
l
l
l
l
l
l
MIN
TYP
MAX
±0.010
±0.010
±0.0125
±0.0125
±0.025
±0.005
±0.015
UNITS
%
%
%
%
%
%
%
ppm/°C
ppm/V
dB
Resistor Matching Ratio (Any Resistor to Any Other A-Grade
Resistor)
T
A
= 0°C to 70°C
T
A
= –40°C to 85°C
T
A
= –40°C to 125°C
B-Grade
A-Grade (Note 6)
B-Grade (Note 6)
(Note 5)
Mil-Std-202 Method 308
A-Grade
B-Grade
Distributed Capacitance
Resistor to Exposed Pad
Resistor to Resistor
(Note 5)
35°C 2000Hours, 10mW
70°C 2000Hours, 10mW
85°C 85%R.H. 168Hours
–50°C to 150°C, 5 Cycles
25°C to 260°C, 3 Cycles
150°C, 1000Hours
20V
P-P
, 1kHz, Difference Amplifier
25°C, Unbiased, 1 Year
(∆R/R)
CMRR
Matching for CMRR
(∆R/R)/∆T
Resistor Matching Ratio Temperature Drift
Resistor Voltage Coefficient
Excess Current Noise
∆R
Absolute Resistor Tolerance
±0.2
<0.1
<–55
±1
l
l
±7.5
±15
5.5
1.4
%
%
pF
pF
∆R/∆T
Absolute Resistor Value Temperature Drift
Resistor Matching Ratio Long-Term Drift
Resistor Matching Ratio Moisture Resistance
Resistor Matching Ratio Thermal Shock/Hysteresis
Resistor Matching Ratio IR Reflow
Resistor Matching Ratio Accelerated Shelf Life
Harmonic Distortion
Shelf Life
l
–10
8
<2
<4
<2
<3
<3
10
–120
±5
25
ppm/°C
ppm
ppm
ppm
ppm
ppm
ppm
dBc
ppm
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.
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.
(
ΔR/R
)
CMRR
=
1
⎛
R2 R3
⎞ ⎛
R1
⎞
•
⎜
–
⎟
•
⎜ ⎟
2
⎝
R1 R4
⎠ ⎝
R2
⎠
The resistor contribution to CMRR can then be calculated in the following
way:
R2
⎞
⎛
4•
⎜
R1
⎟
CMRR
=
(
ΔR/R
)
CMRR
•
⎜
R2 R3
⎟
⎜
2+
+ ⎟
⎝
R1 R4
⎠
For LT5400 options with resistor ratio 1:1, the resistor contribution to
// Copyright 2007 Altera Corporation. All rights reserved. // Altera products are protected under numerous U.S. and foreign patents, // maskwork rights, copyrights and other intell ......
1. Introduction
Electronic scales are gradually replacing traditional measuring tools like springs and balances in everyday life, such as electronic price computing scales and electronic weigh...[详细]
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