LT2178/LT µA Max, Dual and Quad, Single Supply, Precision Op Amps DESCRIPTION FEATURES APPLICATIONS TYPICAL APPLICATION

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1 FEATURES n SO Package with Standard Pinout n Suppy Current per Ampifi er: 7μA Max n Offset otage: 7μ Max n Offset Current: 25pA Max n Input Bias Current: 5nA Max n otage Noise:.9μ P-P,.Hz to Hz n Current Noise:.5pA P-P,.Hz to Hz n Offset otage Drift:.5μ/ C n Gain Bandwidth Product: 85kHz n Sew Rate:.4/μs n Singe Suppy Operation Input otage Range Incudes Ground Output Swings to Ground whie Sinking Current No Pu-Down Resistors Needed n Output Sources and Sinks 5mA Load Current APPLICATIONS n Battery- or Soar-Powered Systems Portabe Instrumentation Remote Sensor Ampifi er Sateite Circuitry n Micropower Sampe-and-Hod n Thermocoupe Ampifi er n Micropower Fiters L, LT, LTC, LTM, Linear Technoogy and the Linear ogo are registered trademarks of Linear Technoogy Corporation. A other trademarks are the property of their respective owners. LT278/ 7µA Max, Dua and Quad, Singe Suppy, Precision Op Amps DESCRIPTION The LT 278 is a micropower dua op amp in a surface mount standard 8-pin configuration, the is a micropower quad op amp offered in a surface mount 4-pin package. Both devices are optimized for singe suppy operation at 5. Specifi cations are aso provided at ±5 suppy. The extremey ow suppy current is combined with true precision specifications: offset votage is μ and offset current is 5pA. Both offset parameters have ow drift with temperature. The.5pA P-P current noise and picoampere offset current permit the use the megohm eve source resistors without introducing serious errors. otage noise, at.9μ P-P, is remarkaby ow considering the ow suppy current. The LT278/ can be operated from a singe suppy (as ow as one ithium-ce or two NiCd batteries). The input range goes beow ground. The a-npn output stage swings to within a few miivots of ground whie sinking current. No power consuming pu down resistors are needed. For surface mount appications where three times higher suppy current is acceptabe, the micropower LT77 singe, LT278 dua and LT279 quad are recommended. The LT77/LT278/LT279 have signifi canty higher bandwidth, sew rate, ower votage noise and better output drive capabiity. For appications requiring DIP packages refer to the LT78/LT79. TYPICAL APPLICATION Sef-Buffered, Dua Output, Micropower Reference Suppy Current vs Temperature 2 /2 LT k.μF LT OUTPUT 2M 5 6 M* M* 4 TO 9 8 /2 LT278.μF TOTAL BATTERY CURRENT = 28mA OUTPUT ACCURACY =.4% MAX TEMPERATURE COEFFICIENT = 2ppm/ C LOAD REGULATION = 25ppm/mA, I L 5mA, 5 LINE REGULATION = ppm/ *.% FILM RESISTORS TA 2.47 OUTPUT SUPPLY CURRENT PER AMPLIFIER A) S = 5 S = 5, S = TEMPERATURE ( C) TA2

2 LT278/ ABSOLUTE MAXIMUM RATINGS Suppy otage...±22 Differentia Input otage...± Input otage... Equa to Positive Suppy otage... 5 Beow Negative Suppy otage Output Short-Circuit Duration... Indefinite Specified Temperature Range Commercia... C to 7 C Industria... 4 C to 85 C Storage Temperature Range C to 5 C Lead Temperature (Sodering, sec)... C PIN CONFIGURATION TOP IEW OUT A IN A 2 IN A 4 A TOP IEW S8 PACKAGE 8-LEAD PLASTIC SO T JMAX = 5 C, θ JA = 9 C/W B OUT B IN B IN B OUT A IN A 2 IN A 4 IN B 5 IN B 6 OUT B 7 A B D 4 OUT D IN D 2 IN D IN C 9 IN C 8 OUT C S PACKAGE 4-LEAD PLASTIC SO T JMAX = 5 C, θ JA = 5 C/W C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LT278ACS8#PBF LT278ACS8#TRPBF 278A 8-Lead Pastic SO C to 7 C LT278AIS8#PBF LT278AIS8#TRPBF 278AI 8-Lead Pastic SO 4 C to 85 C LT278CS8#PBF LT278CS8#TRPBF Lead Pastic SO C to 7 C LT278IS8#PBF LT278IS8#TRPBF 278I 8-Lead Pastic SO 4 C to 85 C ACS#PBF ACS#TRPBF 279A 4-Lead Pastic SO C to 7 C CS#PBF CS#TRPBF Lead Pastic SO C to 7 C IS#PBF IS#TRPBF 279I 4-Lead Pastic SO 4 C to 85 C LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LT278ACS8 LT278ACS8#TR 278A 8-Lead Pastic SO C to 7 C LT278AIS8 LT278AIS8#TR 278AI 8-Lead Pastic SO 4 C to 85 C LT278CS8 LT278CS8#TR Lead Pastic SO C to 7 C LT278IS8 LT278IS8#TR 278I 8-Lead Pastic SO 4 C to 85 C ACS ACS#TR 279A 4-Lead Pastic SO C to 7 C CS CS#TR Lead Pastic SO C to 7 C IS IS#TR 279I 4-Lead Pastic SO 4 C to 85 C Consut LTC Marketing for parts specifi ed with wider operating temperature ranges. For more information on ead free part marking, go to: For more information on tape and ree specifications, go to: 2

3 LT278/ ELECTRICAL CHARACTERISTICS S = 5,, CM =., O =.4,, uness otherwise noted. OS Input Offset otage LT278 Δ OS ΔTime Long Term Input Offset otage Stabiity LT278AC/LT278AI AC LT278C/LT278I C/I MIN TYP MAX MIN TYP MAX UNITS μ μ.5.6 μ/mo I OS Input Offset Current na I B Input Bias Current 5 6 na e n Input Noise otage.hz to Hz (Note 2) μ P-P Input Noise otage Density f O = Hz (Note 2) f O = Hz (Note 2) i n Input Noise Current.Hz to Hz (Note 2) pa P-P Input Noise Current Density f O = Hz (Note 2) f O = Hz Input Resistance (Note ) Differentia Mode Common Mode Input otage Range CMRR Common Mode Rejection Ratio CM = to db PSRR Power Suppy Rejection Ratio S = 2.2 to db A OL Large-Signa otage Gain O =. to 4, No Load (Note ) O =. to.5, R L = 5k Maximum Output otage Swing Output Low, No Load Output Low, 2k to GND Output Low, I SINK = μa Output High, No Load Output High, 2k to GND SR Sew Rate A =, C L = pf (Note ) /μs GBW Gain Bandwidth Product f O 5kHz 6 6 khz I S Suppy Current per Ampifi er μa S = ±.5, O = μa Channe Separation Δ IN =, RL = k db Minimum Suppy otage (Note 4) The denotes the specifi cations which appy over the fu operating temperature range. S = 5,, CM =., O =.4, 4 C T A 85 C for I-grades, uness otherwise noted. (Note 6) OS Input Offset otage LT278 Δ OS ΔT Input Offset otage Drift LT278 (Note 5) LT278AI LT278I/I MIN TYP MAX MIN TYP MAX I OS Input Offset Current.7.7. na I B Input Bias Current na CMRR Common Mode Rejection Ratio CM =.5 to db PSRR Power Suppy Rejection Ratio S = to db n Hz n Hz pa Hz pa Hz GΩ GΩ /m /m m m m UNITS μ μ μ/ºc μ/ºc

4 LT278/ ELECTRICAL CHARACTERISTICS The denotes the specifi cations which appy over the fu operating temperature range. S = 5,, CM =., O =.4, 4 C T A 85 C for I-grades, uness otherwise noted. (Note 6) LT278AI LT278I/I MIN TYP MAX MIN TYP MAX UNITS A OL Large-Signa otage Gain O =.5 to 4, No Load (Note ) O =.5 to.5, R L = 5k /m /m Maximum Output otage Swing Output Low, No Load Output Low, I SINK = μa m m Output High, No Load Output High, 2k to GND I S Suppy Current per Ampifi er μa The denotes the specifi cations which appy over the fu operating temperature range. S = 5,, CM =., O =.4, C T A 7 C, uness otherwise noted. (Note 7) OS Input Offset otage LT278 Δ OS ΔT Input Offset otage Drift LT278 (Note 5) LT278AC/AC LT278C/C MIN TYP MAX MIN TYP MAX I OS Input Offset Current na I B Input Bias Current 6 7 na CMRR Common Mode Rejection Ratio CM = to db PSRR Power Suppy Rejection Ratio S = 2.5 to db A OL Large-Signa otage Gain O =.5 to 4, No Load (Note ) O =.5 to.5, R L = 5k Maximum Output otage Swing Output Low, No Load Output Low, I SINK = μa Output High, No Load Output High, 2k to GND UNITS /m /m m m /m /m m m S = ±5,, uness otherwise noted. LT278AC/LT278AI AC LT278C/LT278I C/I MIN TYP MAX MIN TYP MAX UNITS OS Input Offset otage LT μ μ I OS Input Offset Current na I B Input Bias Current 5 6 na Input otage Range.5 5 CMRR Common Mode Rejection Ratio CM =.5 to db PSRR Power Suppy Rejection Ratio S = 5, to ± db A OL Large-Signa otage Gain O = ±, R L = 5k O = ±, No Load OUT Maximum Output otage Swing R L = 5k R L = 2k SR Sew Rate A = /μs 6 ± ± ±4.2 ± ± ± ±4.2 ±2.7 /m /m 4

5 LT278/ ELECTRICAL CHARACTERISTICS The denotes the specifi cations which appy over the fu operating temperature range. S = 5,, CM =., O =.4, 4 C T A 85 C for I-grades, uness otherwise noted. (Note 6) LT278AC/LT278AI AC LT278C/LT278I C/I MIN TYP MAX MIN TYP MAX UNITS GBW Gain Bandwidth Product f O 5kHz khz I S Suppy Current per Ampifi er μa The denotes the specifi cations which appy over the fu operating temperature range. S = ±5, 4 C T A 85 C for I-grades, uness otherwise noted. OS Input Offset otage LT278 Δ OS ΔT Input Offset otage Drift LT278 (Note 5) LT278AI LT278I/I MIN TYP MAX MIN TYP MAX.6.7 I OS Input Offset Current.7.7. na I B Input Bias Current na A OL Large-Signa otage Gain O = ±, R L = 5k /m CMRR Common Mode Rejection Ratio CM =, db PSRR Power Suppy Rejection Ratio S =, 5 to ± db Maximum Output otage Swing R L = 5k ± ±.5 ± ±.5 I S Suppy Current per Ampifi er μa The denotes the specifications which appy over the fu operating temperature range. S = ±5, C T A 7 C, uness otherwise noted. OS Input Offset otage LT278 Δ OS ΔT Input Offset otage Drift LT278 (Note 5) LT278AC/AC LT278C/C MIN TYP MAX MIN TYP MAX I OS Input Offset Current na I B Input Bias Current 6 7 na A OL Large-Signa otage Gain O = ±, R L = 5k /m CMRR Common Mode Rejection Ratio CM =, db PSRR Power Suppy Rejection Ratio R L = 5k 9 9 db Maximum Output otage Swing R L = 5k ± ±.6 ± ±.6 I S Suppy Current per Ampifi er μa UNITS μ μ μ/ºc μ/ºc UNITS μ μ μ/ºc μ/ºc Note : Stresses beyond those isted under Absoute Maximum Ratings may cause permanent damage to the device. Exposure to any Absoute Maximum Rating condition for extended periods may affect device reiabiity and ifetime. Note 2: Typica parameters are defi ned as the 6% yied of parameter distributions of individua ampifi ers, i.e., out of s (or LT278s) typicay 24 op amps (or 2) wi be better than the indicated specification. Note : This parameter is tested on a sampe basis ony. A noise parameters are tested with S = ±2.5, O =. Note 4: This parameter is guaranteed by design and is not tested. Note 5: Power suppy rejection ratio is measured at the minimum suppy votage. The op amps actuay work at.7 suppy but with a typica offset skew of μ. Note 6: This parameter is not % tested. Note 7: During testing at 4 C, the 5 power suppy turn-on time is ess than.5s. Note 8: The LT278C/C are designed, characterized and expected to meet the industria temperature imits, but are not tested at 4 C and 85 C. I-grade parts are guaranteed. 5

LT278/ TYPICAL PERFORMANCE CHARACTERISTICS NUMBER OF OP AMPS 8 6 4 2 Distribution of Input Offset otage S = 5, 25 OP AMPS TESTED OFFSET OLTAGE SHIFT (μ)

5 25 25 5 75 TEMPERATURE ( C) 2789 G 2789 G2 2789 G SATURATION OLTAGE (m) Output Saturation vs Temperature vs Sink Current Short-Circuit Current.

5 25 25 5 75 TEMPERATURE ( C) 2789 G4 SHORT CIRCUIT CURRENT (ma) SINKING SOURCING 2 2 S = 5, S = 2.5 S = 2.

5 CHANNEL A CHANNEL B 2 4 6 8 2 TIME (SECONDS) 2789 G6 NOISE OLTAGE (.4μ/DI).Hz to Hz Noise Noise Spectrum otage Gain vs Frequency, S = 2.

6 LT278/ TYPICAL PERFORMANCE CHARACTERISTICS NUMBER OF OP AMPS Distribution of Input Offset otage S = 5, 25 OP AMPS TESTED OFFSET OLTAGE SHIFT (μ) Minimum Suppy otage = 85 C 2 25 C 4 C NONFUCTIONAL 4 INPUT OFFSET CURRENT (pa) INPUT BIAS CURRENT (na) Input Bias and Offset Currents vs Temperature S = 5, I OS I B OFFSET OLTAGE (μ) POSITIE SUPPLY OLTAGE () TEMPERATURE ( C) 2789 G 2789 G G SATURATION OLTAGE (m) Output Saturation vs Temperature vs Sink Current Short-Circuit Current.Hz to Hz Noise I SINK = ma I SINK = μa I SINK = μa NO LOAD k TO GROUND 2k TO GROUND S = 5, TEMPERATURE ( C) 2789 G4 SHORT CIRCUIT CURRENT (ma) SINKING SOURCING 2 2 S = 5, S = 2.5 S = 2.5 S = 5 S = 5 2 TIME FROM OUTPUT SHORT TO GROUND (MINUTES) 2789 G5 NOISE OLTAGE (.4μ/DI), S = 2.5 CHANNEL A CHANNEL B TIME (SECONDS) 2789 G6 NOISE OLTAGE (.4μ/DI).Hz to Hz Noise Noise Spectrum otage Gain vs Frequency, S = 2.5 CHANNEL A CHANNEL B TIME (SECONDS) G7 OLTAGE NOISE DENSITY (n Hz) CURRENT NOISE DENSITY (fa Hz). S = 2.5 CURRENT NOISE /f CORNER.5Hz OLTAGE NOISE FREQUENCY (Hz) 2789 G8 OLTAGE GAIN (db) S = 5, S = k k k M FREQUENCY (Hz) G9 6

TYPICAL PERFORMANCE CHARACTERISTICS LT278/ OLTAGE GAIN (db) 2 k Gain, Phase vs Frequency otage Gain vs Load Resistance Capacitive Load Handing GAIN 5, GAIN 5 PHASE 5 k FREQUENCY (Hz) NO LOAD PHASE

CAPACITIE LOAD (pf) 2789 G2 Large-Signa Transient Response S = ±5 Large-Signa Transient Response S = 5, Sma-Signa Transient Response S = ±2.

7 TYPICAL PERFORMANCE CHARACTERISTICS LT278/ OLTAGE GAIN (db) 2 k Gain, Phase vs Frequency otage Gain vs Load Resistance Capacitive Load Handing GAIN 5, GAIN 5 PHASE 5 k FREQUENCY (Hz) NO LOAD PHASE 5,, 2789 G M PHASE SHIFT (DEG) OLTAGE GAIN (/) M M k k k S = 5, S = 5,, S = 5,, T A = 85 C k M M LOAD RESISTANCE TO GROUND (Ω) G OERSHOOT (%) S = 5, A = A = 5 A = CAPACITIE LOAD (pf) 2789 G2 Large-Signa Transient Response S = ±5 Large-Signa Transient Response S = 5, Sma-Signa Transient Response S = ±2.5 5/DI /DI 2m/DI A = C L = 2pF 5μs/DI 2789 G A = μs/di C L = 2pF INPUT PULSE = TO G4 A = C L = 2pF 2μs/DI 2789 G5 2m/DI Sma-Signa Transient Response S = ±5 A = C L = 2pF 2μs/DI 2789 G6 2m/DI Sma-Signa Transient Response S = 5, A = 2μs/DI C L = 2pF INPUT PULSE = 5m TO 5m 2789 G7 COMMON MODE REJECTION RATIO (db) Common Mode Rejection Ratio vs Frequency S = 5, S = 5 k k FREQUENCY (Hz) 2789 G8 k 7

8 LT278/ TYPICAL PERFORMANCE CHARACTERISTICS 2 Power Suppy Rejection Ratio vs Frequency k Cosed Loop Output Impedance S = 5, I L = PSRR (db) NEGATIE SUPPLY POSITIE SUPPLY OUTPUT IMPEDANCE (Ω) k A CL = A CL = A CL = 2. S = 2.5 P-P SINE WAE k k OPERATING FREQUENCY (Hz) k k k FREQUENCY (Hz) k 2789 G G2 SIMPLIFIED SCHEMATIC /2 LT278 /4 k k 2.2k 5.6k.k 6.4k k Q54 Q5 2.5k 2.5k Q5 Q6 Q6 Q4 Q5 Q2 Q47 Q52 Q Q 6Ω 5k IN Q2 C Q 4pF J Q2 Q28 Q8 Q6 Q 6Ω Q22 Q48 IN Q9 Q42 Q5 Q49 Q9 C2 75pF Q2 4 Q7 6.2k Q Q9 Q27 Q4 Q8 8.6k 6.2k Q24 Q29 C 5pF C5 2.5pF Q Q7 Q7 Q2 2A Q Q25 C4 4pF k Q2 2.9k Q4 k Q26 Q5 Ω OUT k Ω Q8 2A Q45 Q44 Q46 Q5 Q55 5.5k Q4 Q4 9.k Q4 7k 7k SS

9 APPLICATIONS INFORMATION Pease see the LT278/LT279 data sheet for appications information. A comments reating to specifications, singe LT278/ suppy operation and phase reversa protection are directy appicabe to the LT278/. Micropower Hz to MHz -to-f Converter IN TO 5 5k MHz TRIM 22k* Hz TRIM 24k TYP 2k A /2 LT278.μF 47k.μF 2k Q8 2N96.5M NC Q7 2N94 CLK μf DD CD424 N448 Q7 Ω μf A2 /2 LT278 k 7 TO k LT C4 RESET SS 2μF pf M F OUT LTC 2 N S D 5pF POLYSTYRENE S D N.22μF D2 S2 D4 S4 N4 N2 GND LINEARITY IS.2% QUIESCENT CURRENT IS 9μA SUPPLY CURRENT IS 6μA AT MHz DRIFT = 5ppm/ C *TRWMTR/5 2ppm/ C 2789 TA 9

10 LT278/ PACKAGE DESCRIPTION S8 Package 8-Lead Pastic Sma Outine (Narrow.5) (Reference LTC DWG # 5-8-6).5 BSC ( ) NOTE MIN ( ).5.57 (.8.988) NOTE..5 TYP RECOMMENDED SOLDER PAD LAYOUT (.2.254) ( ) 8 TYP.5.69 ( ).4. (..254).6.5 (.46.27) NOTE: INCHES. DIMENSIONS IN (MILLIMETERS) 2. DRAWING NOT TO SCALE.4.9 (.55.48) TYP.5 (.27) BSC. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED.6" (.5mm) SO8 S Package 4-Lead Pastic Sma Outine (Narrow.5) (Reference LTC DWG # 5-8-6).5 BSC ( ) NOTE N MIN 2 N/ ( ) N N/ (.8.988) NOTE..5 TYP RECOMMENDED SOLDER PAD LAYOUT (.2.254) ( ) 8 TYP.5.69 ( ).4. (..254).6.5 (.46.27) NOTE: INCHES. DIMENSIONS IN (MILLIMETERS) 2. DRAWING NOT TO SCALE.4.9 (.55.48) TYP.5 (.27) BSC. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED.6" (.5mm) S4 52

11 LT278/ REISION HISTORY (Revision history begins at Rev C) RE DATE DESCRIPTION PAGE NUMBER C / Correct the part numbers on S Package in the Order Information Section. 2 Update to graph G4 6 Information furnished by Linear Technoogy Corporation is beieved to be accurate and reiabe. However, no responsibiity is assumed for its use. Linear Technoogy Corporation makes no representation that the interconnection of its circuits as described herein wi not infringe on existing patent rights.

12 LT278/ TYPICAL APPLICATION Singe Suppy, khz, 4th Order Butterworth Lowpass Fiter IN R k C pf R2 /4 86k /4 k C2 pf 2k pf /4 22k pf /4 OUT 2k. 5k 5k μf 2789 TA4 2-BIT ACCURATE SIGNAL RANGE FROM 6m TO.8 ON. SINGLE SUPPLY. MAXIMUM OUTPUT OFFSET ERROR IS 448μ. FOR EACH 2ND ORDER SECTION: 2 W O = CC2RR2 R = W O QC R2 = Q W O C2 GAIN(dB) FREQUENCY (khz) 2789 TA5 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT78/LT79 Dua/Quad 55μA Max, Singe Suppy Precision Op Amps 7μ OS Max and 2.5μ/ C Drift Max, 2kHz BBW,.7/μs Sew Rate, Input/Output Common Mode Incudes Ground LT2/LT22 4MHz, 7/μs Singe Suppy Dua and Quad Precision Op Amps 275μ OS Max, 6μ/ C Drift Max Input otage Range Incudes Ground LT49/LT49 Dua/ Quad Micropower Rai-to-Rai Input and Output Op Amps Singe Suppy Input Range:.4 to 44, Micropower 5μA Ampifier, Rai-to-Rai Input and Output, 2kHz GBW LT278/LT279 Dua/Quad 55μA Max, Singe Suppy Precision Op Amps 7μ OS Max and 2.5μ/ C Drift Max, 2kHz BBW,.7/μs Sew Rate, Input/Output Common Mode Incudes Ground Surface Mount Standard Pinout 2 LT RE C PRINTED IN USA Linear Technoogy Corporation 6 McCarthy Bvd., Mipitas, CA (48) 42-9 FAX: (48) LINEAR TECHNOLOGY CORPORATION 996

LT1782 Micropower, Over-The-Top SOT-23, Rail-to-Rail Input and Output Op Amp DESCRIPTION FEATURES APPLICATIONS TYPICAL APPLICATION

LT1782 Micropower, Over-The-Top SOT-23, Rail-to-Rail Input and Output Op Amp DESCRIPTION FEATURES APPLICATIONS TYPICAL APPLICATION FEATURES n Operates with Inputs Above n Rai-to-Rai Input and Output n Micropower: Suppy Current Max n Operating Temperature Range: 4 C to 2 C n Low Profie (mm) ThinSOT Package n Low Input Offset otage: