LT5400 Quad Matched Resistor Network Features n n n n n n n Description 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 -55C to 150C Operating Temperature 8-Lead MSOP Package n n 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. Applications n The LT(R)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 specification guarantees CMRR performance to be up to 2x better than independently matched resistors. Difference Amplifier Reference Divider Precision Summing /Subtracting The LT5400 is available in a space-saving 8-pin MSOP package, and is specified over the temperature range of -55C to 150C. 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. Typical Application Difference Amplifier Distribution of Matching Drift 30 4.7pF 1 INPUTS REF - 2 + 3 4 LT5400-4 R1 R2 R3 R4 8 7 6 5 - LT1468 + LT5400-4 CMRR > 80dB AT 200kHz THD < -120dB AT 1kHz, 20VP-P 4.7pF 5400 TA01a RELATIVE OCCURRENCE 25 20 15 10 5 0 -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 Total Voltage (Across Any 2 Pins) (Note 2)...........80V Power Dissipation (Each Resistor) (Note 3)........ 800mW Operating Temperature Range (Note 4) LT5400C............................................... -40C to 85C LT5400I................................................ -40C to 85C LT5400H............................................. -40C to 125C LT5400MP.......................................... -55C to 150C Specified Temperature Range (Note 4) LT5400C................................................... 0C to 70C LT5400I................................................ -40C to 85C LT5400H............................................. -40C to 125C LT5400MP.......................................... -55C to 150C Maximum Junction Temperature ........................... 150C Storage Temperature Range.................... -65C to 150C TOP VIEW 1 2 3 4 R1 R2 R3 R4 8 7 6 5 MS8E PACKAGE 8-LEAD PLASTIC MSOP JA = 40C/W, JC = 10C/W EXPOSED PAD (PIN 9) IS FLOATING Available Options PART NUMBER R2 = R3 () R1 = R4 () 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 Order Information LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT5400ACMS8E-1#PBF LT5400ACMS8E-1#TRPBF LTFVR 8-Lead Plastic MSOP 0C to 70C LT5400BCMS8E-1#PBF LT5400BCMS8E-1#TRPBF LTFVR 8-Lead Plastic MSOP 0C to 70C LT5400AIMS8E-1#PBF LT5400AIMS8E-1#TRPBF LTFVR 8-Lead Plastic MSOP -40C to 85C LT5400BIMS8E-1#PBF LT5400BIMS8E-1#TRPBF LTFVR 8-Lead Plastic MSOP -40C to 85C LT5400AHMS8E-1#PBF LT5400AHMS8E-1#TRPBF LTFVR 8-Lead Plastic MSOP -40C to 125C LT5400BHMS8E-1#PBF LT5400BHMS8E-1#TRPBF LTFVR 8-Lead Plastic MSOP -40C to 125C LT5400BMPMS8E-1#PBF LT5400BMPMS8E-1#TRPBF LTFVR 8-Lead Plastic MSOP -55C to 150C 2 5400fc For more information www.linear.com/LT5400 LT5400 Order Information LT5400ACMS8E-2#PBF LT5400ACMS8E-2#TRPBF LTGBG 8-Lead Plastic MSOP 0C to 70C LT5400BCMS8E-2#PBF LT5400BCMS8E-2#TRPBF LTGBG 8-Lead Plastic MSOP 0C to 70C LT5400AIMS8E-2#PBF LT5400AIMS8E-2#TRPBF LTGBG 8-Lead Plastic MSOP -40C to 85C LT5400BIMS8E-2#PBF LT5400BIMS8E-2#TRPBF LTGBG 8-Lead Plastic MSOP -40C to 85C LT5400AHMS8E-2#PBF LT5400AHMS8E-2#TRPBF LTGBG 8-Lead Plastic MSOP -40C to 125C LT5400BHMS8E-2#PBF LT5400BHMS8E-2#TRPBF LTGBG 8-Lead Plastic MSOP -40C to 125C LT5400BMPMS8E-2#PBF LT5400BMPMS8E-2#TRPBF LTGBG 8-Lead Plastic MSOP -55C to 150C LT5400ACMS8E-3#PBF LT5400ACMS8E-3#TRPBF LTGBH 8-Lead Plastic MSOP 0C to 70C LT5400BCMS8E-3#PBF LT5400BCMS8E-3#TRPBF LTGBH 8-Lead Plastic MSOP 0C to 70C LT5400AIMS8E-3#PBF LT5400AIMS8E-3#TRPBF LTGBH 8-Lead Plastic MSOP -40C to 85C LT5400BIMS8E-3#PBF LT5400BIMS8E-3#TRPBF LTGBH 8-Lead Plastic MSOP -40C to 85C LT5400AHMS8E-3#PBF LT5400AHMS8E-3#TRPBF LTGBH 8-Lead Plastic MSOP -40C to 125C LT5400BHMS8E-3#PBF LT5400BHMS8E-3#TRPBF LTGBH 8-Lead Plastic MSOP -40C to 125C LT5400BMPMS8E-3#PBF LT5400BMPMS8E-3#TRPBF LTGBH 8-Lead Plastic MSOP -55C to 150C LT5400ACMS8E-4#PBF LT5400ACMS8E-4#TRPBF LTGCF 8-Lead Plastic MSOP 0C to 70C LT5400BCMS8E-4#PBF LT5400BCMS8E-4#TRPBF LTGCF 8-Lead Plastic MSOP 0C to 70C LT5400AIMS8E-4#PBF LT5400AIMS8E-4#TRPBF LTGCF 8-Lead Plastic MSOP -40C to 85C LT5400BIMS8E-4#PBF LT5400BIMS8E-4#TRPBF LTGCF 8-Lead Plastic MSOP -40C to 85C LT5400AHMS8E-4#PBF LT5400AHMS8E-4#TRPBF LTGCF 8-Lead Plastic MSOP -40C to 125C LT5400BHMS8E-4#PBF LT5400BHMS8E-4#TRPBF LTGCF 8-Lead Plastic MSOP -40C to 125C LT5400BMPMS8E-4#PBF LT5400BMPMS8E-4#TRPBF LTGCF 8-Lead Plastic MSOP -55C to 150C LT5400ACMS8E-5#PBF LT5400ACMS8E-5#TRPBF LTGCG 8-Lead Plastic MSOP 0C to 70C LT5400BCMS8E-5#PBF LT5400BCMS8E-5#TRPBF LTGCG 8-Lead Plastic MSOP 0C to 70C LT5400AIMS8E-5#PBF LT5400AIMS8E-5#TRPBF LTGCG 8-Lead Plastic MSOP -40C to 85C LT5400BIMS8E-5#PBF LT5400BIMS8E-5#TRPBF LTGCG 8-Lead Plastic MSOP -40C to 85C LT5400BCMS8E-6#PBF LT5400BCMS8E-6#TRPBF LTGCK 8-Lead Plastic MSOP 0C to 70C LT5400BIMS8E-6#PBF LT5400BIMS8E-6#TRPBF LTGCK 8-Lead Plastic MSOP -40C to 85C LT5400BHMS8E-6#PBF LT5400BHMS8E-6#TRPBF LTGCK 8-Lead Plastic MSOP -40C to 125C LT5400BMPMS8E-6#PBF LT5400BMPMS8E-6#TRPBF LTGCK 8-Lead Plastic MSOP -55C to 150C LT5400BCMS8E-7#PBF LT5400BCMS8E-7#TRPBF LTGFT 8-Lead Plastic MSOP 0C to 70C LT5400BIMS8E-7#PBF LT5400BIMS8E-7#TRPBF LTGFT 8-Lead Plastic MSOP -40C to 85C LT5400BHMS8E-7#PBF LT5400BHMS8E-7#TRPBF LTGFT 8-Lead Plastic MSOP -40C to 125C LT5400BMPMS8E-7#PBF LT5400BMPMS8E-7#TRPBF LTGFT 8-Lead Plastic MSOP -55C to 150C LT5400BCMS8E-8#PBF LT5400BCMS8E-8#TRPBF LTGTB 8-Lead Plastic MSOP 0C to 70C LT5400BIMS8E-8#PBF LT5400BIMS8E-8#TRPBF LTGTB 8-Lead Plastic MSOP -40C to 85C LT5400BHMS8E-8#PBF LT5400BHMS8E-8#TRPBF LTGTB 8-Lead Plastic MSOP -40C to 125C LT5400BMPMS8E-8#PBF LT5400BMPMS8E-8#TRPBF LTGTB 8-Lead Plastic MSOP -55C to 150C 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 The l denotes the specifications which apply over the full specified temperature range, otherwise specifications are at TA = 25C. SYMBOL PARAMETER R/R Resistor Matching Ratio (Any Resistor to Any Other A-Grade Resistor) TA = 0C to 70C TA = -40C to 85C TA = -40C to 125C CONDITIONS (R/R)CMRR Matching for CMRR (R/R)/T Resistor Matching Ratio Temperature Drift MIN R/T UNITS l l l % % % % B-Grade l 0.025 % A-Grade (Note 6) l 0.005 % B-Grade (Note 6) l (Note 5) l 0.2 l <0.1 0.015 1 % ppm/C ppm/V Excess Current Noise Mil-Std-202 Method 308 Absolute Resistor Tolerance A-Grade l 7.5 % B-Grade l 15 % <-55 dB Distributed Capacitance Resistor to Exposed Pad Resistor to Resistor Absolute Resistor Value Temperature Drift (Note 5) Resistor Matching Ratio Long-Term Drift 35C 2000Hours, 10mW 70C 2000Hours, 10mW <2 <4 ppm ppm Resistor Matching Ratio Moisture Resistance 85C 85%R.H. 168Hours <2 ppm Resistor Matching Ratio Thermal Shock/Hysteresis -50C to 150C, 5 Cycles <3 ppm Resistor Matching Ratio IR Reflow 25C to 260C, 3 Cycles <3 ppm Resistor Matching Ratio Accelerated Shelf Life 150C, 1000Hours 10 ppm Harmonic Distortion 20VP-P, 1kHz, Difference Amplifier -120 dBc Shelf Life 25C, Unbiased, 1 Year 5 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 -40C to 85C. The LT5400C is designed, characterized and expected to meet specified performance from -40C to 85C but is not tested or QA sampled at these temperatures. The LT5400I is guaranteed to meet specified performance from -40C to 85C. The LT5400H is guaranteed to meet specified performance from -40C to 125C and is 100% tested at these temperature extremes. The LT5400MP is guaranteed to meet specified performance from -55C to 150C and is 100% tested at these temperature extremes. 4 MAX 0.010 0.010 0.0125 0.0125 Resistor Voltage Coefficient R TYP 5.5 1.4 l -10 8 pF pF 25 ppm/C 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 R2 R3 R1 * - * 2 R1 R4 R2 The resistor contribution to CMRR can then be calculated in the following way: R2 4* R1 CMRR = ( R/R) CMRR * R2 R3 2+ + R1 R4 For LT5400 options with resistor ratio 1:1, the resistor contribution to CMRR can be simplified: CMRR (R/R)CMRR 5400fc For more information www.linear.com/LT5400 LT5400 Typical Performance Characteristics Distribution of Matching Drift Change in Matching vs Time 5 CHANGE IN RESISTOR MATCHING (ppm) 30 RELATIVE OCCURRENCE 25 20 15 10 5 0 -1 -0.8-0.6-0.4-0.2 0 0.2 0.4 0.6 0.8 1 ppm/C 4 3 2 1 0 -1 -2 -3 -4 -5 0 5400 G01 400 800 1200 TIME (HOURS) 1600 2000 5400 G02 5400fc For more information www.linear.com/LT5400 5 LT5400 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 temperature 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 (JA or JC as applicable). For example, if each resistor dissipates 250mW, for a total of 1W, the total temperature rise inside the package equals 40C. 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. 6 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). V- V+ BAV99 LT5400 EXTERNAL CONNECTOR LT5400 EXTERNAL CONNECTOR UMZ36K 5400 F01 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 specifications 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 resistor, 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. 5400fc For more information www.linear.com/LT5400 LT5400 Typical Applications Difference Amplifier 4.7pF 1 INPUTS - 2 + 3 4 REF LT5400-4 R1 R2 R3 R4 8 7 6 5 - LT1468 + LT5400-4 CMRR > 80dB AT 200kHz THD < -120dB AT 1kHz, 20VP-P 4.7pF 5400 TA02 Low Noise Reference Divider with Op Amp Input Bias Current Balancing 1 2 5V LTC(R)6655-4.096 4.096V 2.7F 3 4 LT5400-4 R1 R2 R3 R4 8 7 6 5 5V - LT6200 + 2.048V 10F 5400 TA03 Micropower Reference Divide-by-4 VIN 5.5V TO 36V LT6654-5 5V 1F 1 2 3 4 LT5400-2 R1 R2 R3 R4 8 VIN 7 6 + 1.25V LT1638 5 1F - 5400 TA04 5400fc For more information www.linear.com/LT5400 7 LT5400 Typical Applications Gain of 5, Fully-Differential Amplifier LT5400-6 R1 1 IN- 2 IN+ 3 R2 R3 R4 4 5V 8 7 6 - + LTC6362 OUTPUT - + 5 5400 TA05 CMRRTYPICAL = 95.6dB CMRRWORST-CASE 69.55dB THE WORST-CASE VALUE IS GUARANTEED OVER OPERATING TEMPERATUE RANGE Gain of 10, 106dB CMRR, Discrete Component, Fully-Differential Instrumentation Amplifier + VIN- 1/2 LT6011 - 1 LT5400-3 - 2 3 4 R1 R2 R3 R4 + 8 1 7 2 5V LT5400-4 R1 3 6 4 5 - + R2 R3 R4 5V 8 - + 7 6 C2, 0.1F VOCM + - LTC6362 S 5 5400 TA06 1/2 LT6011 VIN+ 8 + - 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. 5400fc For more information www.linear.com/LT5400 LT5400 Typical Applications Low Offset Current-Sense Amplifier 25V 5V RD* 10 RSENSE 10 + LT5400-3 1 2 3 4 R1 R2 R3 R4 + LTC2053 8 + 7 VOUT - 6 5 VOUT = ILOAD * 10k/150 REF - -ILOAD E R6 10k C1 0.1F R7 150 5400 TA07 * -1% VISHAY CRCW1206 AS LONG AS RD-RSENSE << R1 - R4, THE COMMON MODE REJECTION WILL NOT BE DETERIORATED BY THE SENSE RESISTOR. 5400fc For more information www.linear.com/LT5400 9 LT5400 Package Description Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. MS8E Package 8-Lead Plastic MSOP, Exposed Die Pad (Reference LTC DWG # 05-08-1662 Rev I) BOTTOM VIEW OF EXPOSED PAD OPTION 1.88 (.074) 1 1.88 0.102 (.074 .004) 0.29 REF 1.68 (.066) 0.889 0.127 (.035 .005) 0.05 REF 5.23 (.206) MIN DETAIL "B" CORNER TAIL IS PART OF DETAIL "B" THE LEADFRAME FEATURE. FOR REFERENCE ONLY NO MEASUREMENT PURPOSE 1.68 0.102 3.20 - 3.45 (.066 .004) (.126 - .136) 8 3.00 0.102 (.118 .004) (NOTE 3) 0.65 (.0256) BSC 0.42 0.038 (.0165 .0015) TYP 8 7 6 5 0.52 (.0205) REF RECOMMENDED SOLDER PAD LAYOUT 0.254 (.010) 3.00 0.102 (.118 .004) (NOTE 4) 4.90 0.152 (.193 .006) DETAIL "A" 0 - 6 TYP GAUGE PLANE 0.53 0.152 (.021 .006) DETAIL "A" 1 2 3 4 1.10 (.043) MAX 0.86 (.034) REF 0.18 (.007) SEATING PLANE 0.22 - 0.38 (.009 - .015) TYP 0.65 (.0256) BSC 0.1016 0.0508 (.004 .002) 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. 10 5400fc For more information www.linear.com/LT5400 LT5400 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. Clarified Note 6. C 02/15 4 4 Added application schematics. 8, 9 Added 5400-8 2, 3 5400fc 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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. For more information www.linear.com/LT5400 11 LT5400 Typical Application Precision Single-Ended to Differential Conversion 1 LT5400-4 R1 2 IN+ 3 4 R2 R3 R4 8 7 6 - LTC6362 + + OUTPUT - 5 5400 TA08 THD = -110dB AT 1kHz, 8VP-P GROUNDING EXPOSED PAD RESULTS IN STABLE, NO OVERSHOOT RESPONSE Related Parts PART NUMBER DESCRIPTION COMMENTS LT1991 Precision Difference Amplifier 0.04% Resistor Matching,100A Op Amp LT1990 High Voltage Difference Amplifier 250V Input Range LT1167 Instrumentation Amplifier >90dB CMRR 12 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 For more information www.linear.com/LT5400 (408) 432-1900 FAX: (408) 434-0507 www.linear.com/LT5400 5400fc LT 0215 REV C * PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 2011