LT5400 LINER
Document overview
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Technical content
The L T®5400 is a quad resistor network with excellent matching specifications over the entire temperature range. All four resistors can be accessed and biased independently, making the L T5400 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 L T5400 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
– 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 R1L T5400 INPUTS REF
5400 TA01a
ppm/°C RELATIVE OCCURRENCE
5400 G01
L, L T , L TC, L TM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
PIN CONFIGURATIONABSOLUTE MAXIMUM RATINGS Total Voltage (Across Any 2 Pins) (Note 2).……….±80V Operating Temperature Range (Note 4) Specified Temperature Range (Note 4) (Note 1) TOP VIEW MS8E PACKAGE 8-LEAD PLASTIC MSOP θJA = 40°C/W , θJC = 10°C/W EXPOSED PAD (PIN 9) IS FLOATING AVAILABLE OPTIONS PART NUMBER R2 = R3 (Ω) R1 = R4 (Ω) RESISTOR RATIO L T5400-1 10k 10k 1:1 L T5400-2 100k 100k 1:1 L T5400-3 10k 100k 1:10
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE L T5400ACMS8E-1#PBF L T5400ACMS8E-1#TRPBF L TFVR 8-Lead Plastic MSOP 0°C to 70°C L T5400BCMS8E-1#PBF L T5400BCMS8E-1#TRPBF L TFVR 8-Lead Plastic MSOP 0°C to 70°C L T5400AIMS8E-1#PBF L T5400AIMS8E-1#TRPBF L TFVR 8-Lead Plastic MSOP –40°C to 85°C L T5400BIMS8E-1#PBF L T5400BIMS8E-1#TRPBF L TFVR 8-Lead Plastic MSOP –40°C to 85°C L T5400AHMS8E-1#PBF L T5400AHMS8E-1#TRPBF L TFVR 8-Lead Plastic MSOP –40°C to 125°C L T5400BHMS8E-1#PBF L T5400BHMS8E-1#TRPBF L TFVR 8-Lead Plastic MSOP –40°C to 125°C L T5400BMPMS8E-1#PBF L T5400BMPMS8E-1#TRPBF L TFVR 8-Lead Plastic MSOP –55°C to 150°C L T5400ACMS8E-2#PBF L T5400ACMS8E-2#TRPBF L TGBG 8-Lead Plastic MSOP 0°C to 70°C L T5400BCMS8E-2#PBF L T5400BCMS8E-2#TRPBF L TGBG 8-Lead Plastic MSOP 0°C to 70°C L T5400AIMS8E-2#PBF L T5400AIMS8E-2#TRPBF L TGBG 8-Lead Plastic MSOP –40°C to 85°C L T5400BIMS8E-2#PBF L T5400BIMS8E-2#TRPBF L TGBG 8-Lead Plastic MSOP –40°C to 85°C L T5400AHMS8E-2#PBF L T5400AHMS8E-2#TRPBF L TGBG 8-Lead Plastic MSOP –40°C to 125°C L T5400BHMS8E-2#PBF L T5400BHMS8E-2#TRPBF L TGBG 8-Lead Plastic MSOP –40°C to 125°C L T5400BMPMS8E-2#PBF L T5400BMPMS8E-2#TRPBF L TGBG 8-Lead Plastic MSOP –55°C to 150°C L T5400ACMS8E-3#PBF L T5400ACMS8E-3#TRPBF L TGBH 8-Lead Plastic MSOP 0°C to 70°C L T5400BCMS8E-3#PBF L T5400BCMS8E-3#TRPBF L TGBH 8-Lead Plastic MSOP 0°C to 70°C L T5400AIMS8E-3#PBF L T5400AIMS8E-3#TRPBF L TGBH 8-Lead Plastic MSOP –40°C to 85°C L T5400BIMS8E-3#PBF L T5400BIMS8E-3#TRPBF L TGBH 8-Lead Plastic MSOP –40°C to 85°C L T5400BHMS8E-3#PBF L T5400BHMS8E-3#TRPBF L TGBH 8-Lead Plastic MSOP –40°C to 125°C Consult L TC 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/
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 L T5400C is guaranteed functional over the operating temperature range of –40°C to 85°C. The L T5400C 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 L T5400I is guaranteed to meet specified performance from –40°C to 85°C. The L T5400H is guaranteed to meet specified performance from –40°C to 125°C and is 100% tested at these temperature extremes. The L T5400MP 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 <2 ppm Resistor Matching Ratio Moisture Resistance 85°C 85%R.H. 168Hours <2 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 L T5400 when configured in a difference amplifier (see Difference Amplifier in Typical Applications): ∆R/R( ) CMRR = 1 2 • R2 R1– R3 • R1 The resistor contribution to CMRR can then be calculated in the following way: CMRR = ∆R/R( ) CMRR • 4 •R2 2 + R2 + R3 For L T5400 options with resistor ratio 1:1, the resistor contribution to CMRR can be simplified: CMRR ≈ (∆R/R)CMRR
TYPICAL PERFORMANCE CHARACTERISTICS Distribution of Matching Drift Change in Matching vs Time 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 L T5400 can withstand up to ±1kV of electrostatic discharge (ESD, human body). To achieve the highest precision matching, the L T5400 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 L T5400 against large ESD strikes, external protection can be added using diodes to the circuit supply rails or bidirectional Zeners to ground (Figure 1). ppm/°C RELATIVE OCCURRENCE TIME (HOURS) CHANGE IN RESISTOR MATCHING (ppm) 400 800
5400 G02
V+V– L T5400 UMZ36K
5400 F01
Reference Divider with Op Amp Input Bias Current Balancing Reference Divide-by-4 R1L T5400 THIS CIRCUIT CAN BE IMPLEMENTED USING ANY L T5400 RESISTOR OPTION INPUTS
5400 TA02
THIS CIRCUIT CAN BE IMPLEMENTED USING ANY L T5400 RESISTOR OPTION THAT HAS A RESISTOR RATIO OF 1:1 REF 3
5400 TA03
5400 TA04
THIS CIRCUIT CAN BE IMPLEMENTED USING ANY L T5400 RESISTOR OPTION THAT HAS A RESISTOR RATIO OF 1:1
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. PACKAGE DESCRIPTION 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
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 0411 • PRINTED IN USA RELATED PARTS TYPICAL APPLICATION PART NUMBER DESCRIPTION COMMENTS L T1991 Precision Difference Amplifier 0.04% Resistor Matching,100µA Op Amp L T1990 High Voltage Difference Amplifier ±250V Input Range L T1167 Instrumentation Amplifier >90dB CMRR Precision Single-Ended to Differential Conversion R1L T5400 2IN + OUTPUT