LT5400BCMS8E-1 [Linear]
Quad Matched Resistor Network Long-Term Stability: <2ppm at 2000 Hrs; 四匹配的电阻网络长期稳定性: \u003c 2ppm的在2000小时型号: | LT5400BCMS8E-1 |
厂家: | Linear |
描述: | Quad Matched Resistor Network Long-Term Stability: <2ppm at 2000 Hrs |
文件: | 总8页 (文件大小:199K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LT5400
Quad Matched
Resistor Network
FEATURES
DESCRIPTION
The LT®5400 is a quad resistor network with excellent
matching specifications over the entire temperature
range.
n
Excellent Matching
– A-Grade: 0.01% Matching
– B-Grade: 0.025% Matching
n
0.2ppm/°C Matching Temperature Drift
Allfourresistorscanbeaccessedandbiasedindependently,
making the LT5400 a convenient and versatile choice for
any application that can benefit from matched resistors.
n
±±5ꢀ Operating ꢀoltage (±80ꢀ Abs Maxꢁ
n
8ppm/°C Absolute Resistor ꢀalue Temperature Drift
n
Long-Term Stability: <2ppm at 2000 Hrs
n
Theseresistornetworksprovidepreciseratiometricstability
required in highly accurate difference amplifiers, voltage
references and bridge circuits.
–55°C to 150°C Operating Temperature
n
8-Lead MSOP Package
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.
APPLICATIONS
n
Difference Amplifier
Reference Divider
n
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
Precision Summing/Subtracting
TYPICAL APPLICATION
Difference Amplifier
Distribution of Matching Drift
30
LT5400
R1
R2
R3
R4
25
20
15
10
5
1
2
3
4
8
7
6
5
–
+
–
+
INPUTS
REF
5400 TA01a
0
–1 –0.8–0.6–0.4–0.2
0
0.2 0.4 0.6 0.8
1
ppm/°C
5400 G01
5400f
1
LT5400
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATION
(Note 1)
TOP VIEW
Total ꢀoltage (Across Any 2 Pinsꢁ (Note 2ꢁ.……….±80ꢀ
Power Dissipation (Each Resistorꢁ (Note 3ꢁ ....... 800mW
Operating Temperature Range (Note 4ꢁ
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 4ꢁ
R1
1
2
3
4
8
7
6
5
R2
R3
R4
MS8E PACKAGE
8-LEAD PLASTIC MSOP
θ
= 40°C/W, θ = 10°C/W
JC
EXPOSED PAD (PIN 9ꢁ IS FLOATING
JA
LT5400C .................................................. 0°C to ±0°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
AVAILABLE OPTIONS
PART NUMBER
LT5400-1
R2 = R3 (Ω)
10k
R1 = R4 (Ω)
10k
RESISTOR RATIO
1:1
LT5400-2
100k
100k
1:1
LT5400-3
10k
100k
1:10
5400f
2
LT5400
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
LTFꢀR
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
8-Lead Plastic MSOP
SPECIFIED TEMPERATURE RANGE
0°C to ±0°C
LT5400ACMS8E-1#PBF
LT5400BCMS8E-1#PBF
LT5400AIMS8E-1#PBF
LT5400BIMS8E-1#PBF
LT5400AHMS8E-1#PBF
LT5400BHMS8E-1#PBF
LT5400BMPMS8E-1#PBF
LT5400ACMS8E-2#PBF
LT5400ACMS8E-1#TRPBF
LT5400BCMS8E-1#TRPBF
LT5400AIMS8E-1#TRPBF
LT5400BIMS8E-1#TRPBF
LT5400AHMS8E-1#TRPBF
LT5400BHMS8E-1#TRPBF
LT5400BMPMS8E-1#TRPBF
LT5400ACMS8E-2#TRPBF
LTFꢀR
0°C to ±0°C
LTFꢀR
–40°C to 85°C
LTFꢀR
–40°C to 85°C
LTFꢀR
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
0°C to ±0°C
LTFꢀR
LTFꢀR
LTGBG
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
LT5400BHMS8E-3#PBF
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
LT5400BHMS8E-3#TRPBF
LTGBG
LTGBG
LTGBG
LTGBG
LTGBG
LTGBG
LTGBH
LTGBH
LTGBH
LTGBH
LTGBH
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 ±0°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 ±0°C
0°C to ±0°C
–40°C to 85°C
–40°C to 85°C
–40°C to 125°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/
5400f
3
LT5400
ELECTRICAL CHARACTERISTICS 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
Resistor Matching Ratio (Any Resistor to Any
Other Resistorꢁ
A-Grade
±0.010
±0.010
±0.0125
±0.0125
%
%
%
%
∆R/R
l
l
l
T = 0°C to ±0°C
A
T = –40°C to 85°C
A
T = –40°C to 125°C
A
l
l
l
l
l
B-Grade
±0.025
±0.005
±0.015
±1
%
%
(∆R/Rꢁ
Matching for CMRR
A-Grade (Note 6ꢁ
B-Grade (Note 6ꢁ
(Note 5ꢁ
CMRR
%
Resistor Matching Ratio Temperature Drift
Resistor ꢀoltage Coefficient
Excess Current Noise
±0.2
<0.1
<–55
ppm/°C
ppm/ꢀ
dB
(∆R/Rꢁ/∆T
∆R
Mil-Std-202 Method 308
A-Grade
l
l
Absolute Resistor Tolerance
±±.5
±15
%
B-Grade
%
Distributed Capacitance
Resistor to Exposed Pad
Resistor to Resistor
5.5
1.4
pF
pF
l
Absolute Resistor ꢀalue Temperature Drift
Resistor Matching Ratio Long-Term Drift
Resistor Matching Ratio Moisture Resistance
(Note 5ꢁ
–10
8
25
ppm/°C
ppm
∆R/∆T
35°C 2000Hours
85°C 85%R.H. 168Hours
<2
<2
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 5: This parameter is not 100% tested.
Note 6: (∆R/Rꢁ (Matching for CMRRꢁ is a metric for the contribution
of error from the LT5400 when configured in a difference amplifier (see
Difference Amplifier in Typical Applicationsꢁ:
CMRR
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.
1
2
R2 R3
R1 R4
R1
R2
∆R/R
=
•
–
•
(
)
CMRR
The resistor contribution to CMRR can then be calculated in the following
way:
R2
R1
Note 3: In order to keep the junction temperature within the Absolute
Maximum Rating, maximum power dissipation should be derated at
elevated ambient temperatures.
4 •
CMRR = ∆R/R
•
(
)
CMRR
R2 R3
2 +
+
R1 R4
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.
For LT5400 options with resistor ratio 1:1, the resistor contribution to
CMRR can be simplified:
CMRR ≈ (∆R/Rꢁ
CMRR
5400f
4
LT5400
TYPICAL PERFORMANCE CHARACTERISTICS
Distribution of Matching Drift
Change in Matching vs Time
5
4
30
25
20
15
10
5
3
2
1
0
–1
–2
–3
–4
–5
0
–1 –0.8–0.6–0.4–0.2 0 0.2 0.4 0.6 0.8
ppm/°C
1
0
400
800
1200
1600
2000
TIME (HOURS)
5400 G02
5400 G01
APPLICATIONS INFORMATION
Where to Connect the Exposed Pad
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.
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 groundꢁ as long as the
absolute maximum ratings are observed.
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.
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.
ESD
The LT5400 can withstand up to ±1kꢀ of electrostatic
discharge (ESD, human bodyꢁ. To achieve the highest
precisionmatching,theLT5400isdesignedwithoutexplicit
ESD internal protection diodes. ESD beyond this voltage
can damage or degrade the device including causing
pin-to-pin shorts.
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
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 1ꢁ.
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
–
+
V
V
BAV99
LT5400
LT5400
EXTERNAL
CONNECTOR
EXTERNAL
CONNECTOR
coefficient of the package (θ or θ as applicableꢁ.
JA
JC
UMZ36K
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,
5400 F01
Figure 1
5400f
5
LT5400
TYPICAL APPLICATIONS
Difference Amplifier
LT5400
R1
R2
R3
R4
1
2
3
4
8
7
6
5
–
+
–
+
INPUTS
5400 TA02
THIS CIRCUIT CAN BE IMPLEMENTED USING ANY LT5400 RESISTOR OPTION
Reference Divider with Op Amp Input Bias Current Balancing
LT5400-1
R1
1
2
3
4
8
7
6
5
–
+
R2
R3
R4
REF/2
REF
5400 TA03
THIS CIRCUIT CAN BE IMPLEMENTED USING ANY LT5400
RESISTOR OPTION THAT HAS A RESISTOR RATIO OF 1:1
Reference Divide-by-4
LT5400-1
R1
REF
1
2
3
4
8
7
6
5
R2
R3
R4
+
–
REF/4
5400 TA04
THIS CIRCUIT CAN BE IMPLEMENTED USING ANY LT5400
RESISTOR OPTION THAT HAS A RESISTOR RATIO OF 1:1
5400f
6
LT5400
PACKAGE DESCRIPTION
MS8E Package
8-Lead Plastic MSOP, Exposed Die Pad
(Reference LTC DWG # 05-08-1662 Rev Iꢁ
BOTTOM VIEW OF
EXPOSED PAD OPTION
1.88
(.074)
1.68
1
0.29
REF
1.88 ± 0.102
(.074 ± .004)
0.889 ± 0.127
(.035 ± .005)
(.066)
0.05 REF
DETAIL “B”
5.23
(.206)
MIN
3.20 – 3.45
(.126 – .136)
1.68 ± 0.102
CORNER TAIL IS PART OF
THE LEADFRAME FEATURE.
FOR REFERENCE ONLY
(.066 ± .004)
DETAIL “B”
8
NO MEASUREMENT PURPOSE
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
0.65
(.0256)
BSC
0.52
(.0205)
REF
0.42 ± 0.038
(.0165 ± .0015)
8
7 6
5
TYP
RECOMMENDED SOLDER PAD LAYOUT
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
4.90 ± 0.152
(.193 ± .006)
DETAIL “A”
0.254
(.010)
0° – 6° TYP
GAUGE PLANE
1
2
3
4
0.53 ± 0.152
(.021 ± .006)
1.10
(.043)
MAX
0.86
(.034)
REF
DETAIL “A”
0.18
(.007)
SEATING
PLANE
0.22 – 0.38
(.009 – .015)
TYP
0.1016 ± 0.0508
(.004 ± .002)
0.65
(.0256)
BSC
MSOP (MS8E) 0910 REV I
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.
5400f
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.
7
LT5400
TYPICAL APPLICATION
Precision Single-Ended to Differential Conversion
LT5400
R1
1
2
3
4
8
7
6
5
–
+
R2
R3
R4
IN +
–
OUTPUT
+
5400 TA05
RELATED PARTS
PART NUMBER
LT1991
DESCRIPTION
COMMENTS
Precision Difference Amplifier
0.04% Resistor Matching,100µA Op Amp
±250ꢀ Input Range
LT1990
High ꢀoltage Difference Amplifier
Instrumentation Amplifier
LT116±
>90dB CMRR
5400f
LT 0411 • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-±41±
8
●
●
LINEAR TECHNOLOGY CORPORATION 2011
(408ꢁ 432-1900 FAX: (408ꢁ 434-050± www.linear.com
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