LT5400

LT5400 - Quad Matched Resistor Network

Document overview

• Manufacturer or author: Linear Technology Corporation
• PDF pages: 12

Technical content

5400fcFor more information www.linear .com/L T5400 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 A-Grade: 0.01% Matching n 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 R1L T5400-4 4.7pF INPUTS REF

5400 TA01a

4.7pF L T1468 L T5400-4 CMRR > 80dB AT 200kHz THD < –120dB AT 1kHz, 20V P-P Difference Amplifier ppm/°C 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.

5400fc For more information www.linear .com/L T5400 pin conFiguraTionabsoluTe MaxiMuM raTings Total Voltage (Across Any 2 Pins) (Note 2).……….±80V 0mW Operating Temperature Range (Note 4) LT540 0°C to 85°C LT540 40°C to 85°C LT540 40°C to 125°C LT540 55°C to 150°C Specified Temperature Range (Note 4) LT540 LT540 40°C to 85°C LT540 40°C to 125°C LT540 55°C to 150°C 0°C 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 FLOA TING 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 LT5400-8 1k 9k 1:9 LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT5400ACMS8E-1#PBF LT5400ACMS8E-1#TRPBF L TFVR 8-Lead Plastic MSOP 0°C to 70°C LT5400BCMS8E-1#PBF LT5400BCMS8E-1#TRPBF L TFVR 8-Lead Plastic MSOP 0°C to 70°C LT5400AIMS8E-1#PBF LT5400AIMS8E-1#TRPBF L TFVR 8-Lead Plastic MSOP –40°C to 85°C LT5400BIMS8E-1#PBF LT5400BIMS8E-1#TRPBF L TFVR 8-Lead Plastic MSOP –40°C to 85°C LT5400AHMS8E-1#PBF LT5400AHMS8E-1#TRPBF L TFVR 8-Lead Plastic MSOP –40°C to 125°C LT5400BHMS8E-1#PBF LT5400BHMS8E-1#TRPBF L TFVR 8-Lead Plastic MSOP –40°C to 125°C LT5400BMPMS8E-1#PBF LT5400BMPMS8E-1#TRPBF L TFVR 8-Lead Plastic MSOP –55°C to 150°C

5400fcFor more information www.linear .com/L T5400 orDer inForMaTion LT5400ACMS8E-2#PBF LT5400ACMS8E-2#TRPBF L TGBG 8-Lead Plastic MSOP 0°C to 70°C LT5400BCMS8E-2#PBF LT5400BCMS8E-2#TRPBF L TGBG 8-Lead Plastic MSOP 0°C to 70°C LT5400AIMS8E-2#PBF LT5400AIMS8E-2#TRPBF L TGBG 8-Lead Plastic MSOP –40°C to 85°C LT5400BIMS8E-2#PBF LT5400BIMS8E-2#TRPBF L TGBG 8-Lead Plastic MSOP –40°C to 85°C LT5400AHMS8E-2#PBF LT5400AHMS8E-2#TRPBF L TGBG 8-Lead Plastic MSOP –40°C to 125°C LT5400BHMS8E-2#PBF LT5400BHMS8E-2#TRPBF L TGBG 8-Lead Plastic MSOP –40°C to 125°C LT5400BMPMS8E-2#PBF LT5400BMPMS8E-2#TRPBF L TGBG 8-Lead Plastic MSOP –55°C to 150°C LT5400ACMS8E-3#PBF LT5400ACMS8E-3#TRPBF L TGBH 8-Lead Plastic MSOP 0°C to 70°C LT5400BCMS8E-3#PBF LT5400BCMS8E-3#TRPBF L TGBH 8-Lead Plastic MSOP 0°C to 70°C LT5400AIMS8E-3#PBF LT5400AIMS8E-3#TRPBF L TGBH 8-Lead Plastic MSOP –40°C to 85°C LT5400BIMS8E-3#PBF LT5400BIMS8E-3#TRPBF L TGBH 8-Lead Plastic MSOP –40°C to 85°C LT5400AHMS8E-3#PBF LT5400AHMS8E-3#TRPBF L TGBH 8-Lead Plastic MSOP –40°C to 125°C LT5400BHMS8E-3#PBF LT5400BHMS8E-3#TRPBF L TGBH 8-Lead Plastic MSOP –40°C to 125°C LT5400BMPMS8E-3#PBF LT5400BMPMS8E-3#TRPBF L TGBH 8-Lead Plastic MSOP –55°C to 150°C LT5400ACMS8E-4#PBF LT5400ACMS8E-4#TRPBF L TGCF 8-Lead Plastic MSOP 0° C to 70°C LT5400BCMS8E-4#PBF LT5400BCMS8E-4#TRPBF L TGCF 8-Lead Plastic MSOP 0°C to 70°C LT5400AIMS8E-4#PBF LT5400AIMS8E-4#TRPBF L TGCF 8-Lead Plastic MSOP –40°C to 85°C LT5400BIMS8E-4#PBF LT5400BIMS8E-4#TRPBF L TGCF 8-Lead Plastic MSOP –40°C to 85°C LT5400AHMS8E-4#PBF LT5400AHMS8E-4#TRPBF L TGCF 8-Lead Plastic MSOP –40°C to 125°C LT5400BHMS8E-4#PBF LT5400BHMS8E-4#TRPBF L TGCF 8-Lead Plastic MSOP –40°C to 125°C LT5400BMPMS8E-4#PBF LT5400BMPMS8E-4#TRPBF L TGCF 8-Lead Plastic MSOP –55°C to 150°C LT5400ACMS8E-5#PBF LT5400ACMS8E-5#TRPBF L TGCG 8-Lead Plastic MSOP 0°C to 70°C LT5400BCMS8E-5#PBF LT5400BCMS8E-5#TRPBF L TGCG 8-Lead Plastic MSOP 0°C to 70°C LT5400AIMS8E-5#PBF LT5400AIMS8E-5#TRPBF L TGCG 8-Lead Plastic MSOP –40°C to 85°C LT5400BIMS8E-5#PBF LT5400BIMS8E-5#TRPBF L TGCG 8-Lead Plastic MSOP –40°C to 85°C LT5400BCMS8E-6#PBF LT5400BCMS8E-6#TRPBF L TGCK 8-Lead Plastic MSOP 0°C to 70°C LT5400BIMS8E-6#PBF LT5400BIMS8E-6#TRPBF L TGCK 8-Lead Plastic MSOP –40°C to 85°C LT5400BHMS8E-6#PBF LT5400BHMS8E-6#TRPBF L TGCK 8-Lead Plastic MSOP –40°C to 125°C LT5400BMPMS8E-6#PBF LT5400BMPMS8E-6#TRPBF L TGCK 8-Lead Plastic MSOP –55°C to 150°C LT5400BCMS8E-7#PBF LT5400BCMS8E-7#TRPBF L TGFT 8-Lead Plastic MSOP 0° C to 70°C LT5400BIMS8E-7#PBF LT5400BIMS8E-7#TRPBF L TGFT 8-Lead Plastic MSOP –40°C to 85°C LT5400BHMS8E-7#PBF LT5400BHMS8E-7#TRPBF L TGFT 8-Lead Plastic MSOP –40°C to 125°C LT5400BMPMS8E-7#PBF LT5400BMPMS8E-7#TRPBF L TGFT 8-Lead Plastic MSOP –55°C to 150°C LT5400BCMS8E-8#PBF LT5400BCMS8E-8#TRPBF L TGTB 8-Lead Plastic MSOP 0°C to 70°C LT5400BIMS8E-8#PBF LT5400BIMS8E-8#TRPBF L TGTB 8-Lead Plastic MSOP –40°C to 85°C LT5400BHMS8E-8#PBF LT5400BHMS8E-8#TRPBF L TGTB 8-Lead Plastic MSOP –40°C to 125°C LT5400BMPMS8E-8#PBF LT5400BMPMS8E-8#TRPBF L TGTB 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/

5400fc For more information www.linear .com/L T5400

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 T A = 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)/∆T Resistor 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 ∆R Absolute 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/ ∆T Absolute 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 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 cir cuits in the Typical Applications section for examples. ΔR/R( ) CMRR = 1 2 • R2 R1– R3 ⎝⎜ ⎞ ⎠⎟• R1 ⎝⎜ ⎞ The resistor contribution to CMRR can then be calculated in the following way: CMRR= ΔR/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

5400fcFor more information www.linear .com/L T5400 Typical perForMance characTerisTics Distribution of Matching Drift Change in Matching vs Time ppm/°C RELATIVE OCCURRENCE TIME (HOURS) CHANGE IN RESISTOR MATCHING (ppm) 400 800

5400 G02

5400fc For more information www.linear .com/L T5400 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 (θ JA 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). L T5400 EXTERNAL CONNECTOR BAV99 V+V– L T5400 UMZ36K

5400 F01

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 ap pear 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 error from the ideal 0.50000.

5400fcFor more information www.linear .com/L T5400 Typical applicaTions Difference Amplifier Low Noise Reference Divider with Op Amp Input Bias Current Balancing Micropower Reference Divide-by-4 R1L T5400-4 4.7pF INPUTS REF

5400 TA02

4.7pF L T1468 L T5400-4 CMRR > 80dB AT 200kHz THD < –120dB AT 1kHz, 20V P-P R1L T5400-4 2.048V 10µF

5400 TA03

+2.7µF 4.096V L T6200 LT C®6655-4.096 R1L T5400-2 2 V IN

5400 TA04

1µF 1.25V 1µF 5VVIN 5.5V TO 36V L T1638 L T6654-5

5400fc For more information www.linear .com/L T5400 Typical applicaTions Gain of 5, Fully-Differential Amplifier Gain of 10, 106dB CMRR, Discrete Component, Fully-Differential Instrumentation Amplifier R1L T5400-6 IN+ IN– OUTPUT CMRRTYPICAL = 95.6dB CMRRWORST-CASE ≈ 69.55dB THE WORST-CASE VALUE IS GUARANTEED OVER OPERATING TEMPERATUE RANGE

5400 TA05

5400 TA06

S VOCM V IN– THE L T5400-3 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. L T6011 C2, 0.1µF +VIN+ L T5400-3 L T6011

5400fcFor more information www.linear .com/L T5400 Typical applicaTions Low Offset Current-Sense Amplifier 10k 150/uni03A9 0.1µF

5400 TA07

E – 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. L T5400-3 REF RSENSE 10/uni03A9 RD* 10/uni03A9 ILOAD 25V

5400fc For more information www.linear .com/L T5400 8-Lead Plastic MSOP , Exposed Die Pad (Reference L TC 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 3 4 4.90 ± 0.152 (.193 ± .006) BOTTOM VIEW OF EXPOSED PAD OPTION 7 6 5 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 (.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 ONL Y 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.

5400fcFor more information www.linear .com/L T5400 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 C 02/15 Added 5400-8 2, 3

5400fc For more information www.linear .com/L T5400 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 R1L T5400-4 IN+ OUTPUT THD = –110dB AT 1kHz, 8VP-P GROUNDING EXPOSED PAD RESUL TS IN STABLE, NO OVERSHOOT RESPONSE

5400 TA08

 LINEAR TECHNOLOGY CORPORATION 2011 LT 0215 REV C • PRINTED IN USA Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear .com/L T5400