LT2178/LT2179 17A Max, Dual and Quad, Single Supply, Precision Op Amps DESCRIPTION FEATURES n n n n n n n n n n n n SO Package with Standard Pinout Supply Current per Amplifier: 17A Max Offset Voltage: 70V Max Offset Current: 250pA Max Input Bias Current: 5nA Max Voltage Noise: 0.9VP-P, 0.1Hz to 10Hz Current Noise: 1.5pAP-P, 0.1Hz to 10Hz Offset Voltage Drift: 0.5V/C Gain Bandwidth Product: 85kHz Slew Rate: 0.04V/s Single Supply Operation Input Voltage Range Includes Ground Output Swings to Ground while Sinking Current No Pull-Down Resistors Needed Output Sources and Sinks 5mA Load Current n n n The extremely low supply current is combined with true precision specifications: offset voltage is 30V and offset current is 50pA. Both offset parameters have low drift with temperature. The 1.5pAP-P current noise and picoampere offset current permit the use the megohm level source resistors without introducing serious errors. Voltage noise, at 0.9VP-P, is remarkably low considering the low supply current. The LT2178/LT2179 can be operated from a single supply (as low as one lithium-cell or two NiCd batteries). The input range goes below ground. The all-NPN output stage swings to within a few millivolts of ground while sinking current. No power consuming pull down resistors are needed. APPLICATIONS n The LT(R)2178 is a micropower dual op amp in a surface mount standard 8-pin configuration, the LT2179 is a micropower quad op amp offered in a surface mount 14-pin package. Both devices are optimized for single supply operation at 5V. Specifications are also provided at 15V supply. Battery- or Solar-Powered Systems Portable Instrumentation Remote Sensor Amplifier Satellite Circuitry Micropower Sample-and-Hold Thermocouple Amplifier Micropower Filters 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. For surface mount applications where three times higher supply current is acceptable, the micropower LT1077 single, LT2078 dual and LT2079 quad are recommended. The LT1077/LT2078/LT2079 have significantly higher bandwidth, slew rate, lower voltage noise and better output drive capability. For applications requiring DIP packages refer to the LT1178/LT1179. TYPICAL APPLICATION Self-Buffered, Dual Output, Micropower Reference - 1/2 LT2178 3 1 + 1.2365V OUTPUT 4V TO 9V 4 5 + 6 - 250k TOTAL BATTERY CURRENT = 28mA OUTPUT ACCURACY = p0.4% MAX TEMPERATURE COEFFICIENT = 20ppm/C LOAD REGULATION = 25ppm/mA, IL 5mA, V+ 5V LINE REGULATION = 10ppm/V * 0.1% FILM RESISTORS 8 1/2 LT2178 7 2M 0.1F 0.1F LT1004-1.2 1M* 1M* 21789 TA01 2.470V OUTPUT SUPPLY CURRENT PER AMPLIFIER A) 2 Supply Current vs Temperature 20 18 VS = p15V 16 14 VS = 5V, 0V 12 10 -50 VS = p1.5V -25 25 50 0 TEMPERATURE (C) 75 100 21789 TA02 21789fc 1 LT2178/LT2179 ABSOLUTE MAXIMUM RATINGS Supply Voltage ........................................................22V Differential Input Voltage.........................................30V Input Voltage................ Equal to Positive Supply Voltage ............................. 5V Below Negative Supply Voltage Output Short-Circuit Duration .......................... Indefinite Specified Temperature Range Commercial.............................................. 0C to 70C Industrial ............................................. -40C to 85C Storage Temperature Range................... -65C to 150C Lead Temperature (Soldering, 10 sec) .................. 300C PIN CONFIGURATION TOP VIEW V- 4 - + A - B+ V+ 7 OUT B 6 -IN B 5 +IN B - +IN A 3 + V+ -IN B 6 OUT B 7 TJMAX = 150C, JA = 190C/W A D+ 13 -IN D 12 +IN D 11 V- 4 +IN B 5 S8 PACKAGE 8-LEAD PLASTIC SO - + -B C - +IN A 3 8 -IN A 2 + OUT A 1 -IN A 2 14 OUT D OUT A 1 TOP VIEW 10 +IN C 9 -IN C 8 OUT C S PACKAGE 14-LEAD PLASTIC SO TJMAX = 150C, JA = 150C/W ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LT2178ACS8#PBF LT2178ACS8#TRPBF 2178A 8-Lead Plastic SO 0C to 70C LT2178AIS8#PBF LT2178AIS8#TRPBF 2178AI 8-Lead Plastic SO -40C to 85C LT2178CS8#PBF LT2178CS8#TRPBF 2178 8-Lead Plastic SO 0C to 70C LT2178IS8#PBF LT2178IS8#TRPBF 2178I 8-Lead Plastic SO -40C to 85C LT2179ACS#PBF LT2179ACS#TRPBF 2179A 14-Lead Plastic SO 0C to 70C LT2179CS#PBF LT2179CS#TRPBF 2179 14-Lead Plastic SO 0C to 70C LT2179IS#PBF LT2179IS#TRPBF 2179I 14-Lead Plastic SO -40C to 85C LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LT2178ACS8 LT2178ACS8#TR 2178A 8-Lead Plastic SO 0C to 70C LT2178AIS8 LT2178AIS8#TR 2178AI 8-Lead Plastic SO -40C to 85C LT2178CS8 LT2178CS8#TR 2178 8-Lead Plastic SO 0C to 70C LT2178IS8 LT2178IS8#TR 2178I 8-Lead Plastic SO -40C to 85C LT2179ACS LT2179ACS#TR 2179A 14-Lead Plastic SO 0C to 70C LT2179CS LT2179CS#TR 2179 14-Lead Plastic SO 0C to 70C LT2179IS LT2179IS#TR 2179I 14-Lead Plastic SO -40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. 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/ 21789fc 2 LT2178/LT2179 ELECTRICAL CHARACTERISTICS VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 25C, unless otherwise noted. LT2178AC/LT2178AI LT2179AC MIN TYP MAX LT2178C/LT2178I LT2179C/LT2179I MIN TYP MAX 30 35 40 40 UNITS SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage LT2178 LT2179 VOS Time Long Term Input Offset Voltage Stability 0.5 IOS Input Offset Current 0.05 0.25 0.05 0.35 nA IB Input Bias Current 3 5 3 6 nA en Input Noise Voltage 0.1Hz to 10Hz (Note 2) 0.9 2.0 0.9 VP-P Input Noise Voltage Density fO = 10Hz (Note 2) fO = 1000Hz (Note 2) 50 49 75 65 50 49 nVHz nVHz Input Noise Current 0.1Hz to 10Hz (Note 2) 1.5 2.5 1.5 pAP-P Input Noise Current Density fO = 10Hz (Note 2) fO = 1000Hz 0.03 0.01 0.07 0.03 0.01 pAHz pAHz Input Resistance Differential Mode Common Mode (Note 3) in Input Voltage Range 70 100 120 150 0.6 V V V/Mo 0.8 2 12 0.6 2 12 G G 3.5 0 3.9 -0.3 3.5 0 3.9 -0.3 V V CMRR Common Mode Rejection Ratio VCM = 0V to 3.5V 93 103 90 102 dB PSRR Power Supply Rejection Ratio VS = 2.2V to 12V 94 104 92 104 dB AVOL Large-Signal Voltage Gain VO = 0.03V to 4V, No Load (Note 3) VO = 0.03V to 3.5V, RL = 50k 140 80 700 200 110 70 700 200 V/mV V/mV Maximum Output Voltage Swing Output Low, No Load Output Low, 2k to GND Output Low, ISINK = 100A 6.5 0.2 120 Output High, No Load Output High, 2k to GND 4.2 3.5 4.4 3.8 Slew Rate AV = 1, CL = 10pF (Note 3) GBW Gain Bandwidth Product fO 5kHz 60 IS Supply Current per Amplifier VS = 1.5V, VO = 0V 13 12 Channel Separation VIN = 3V, RL = 10k 110 Minimum Supply Voltage (Note 4) SR 9 0.6 160 4.2 3.5 0.013 0.025 2 6.5 0.2 120 9 0.6 160 4.4 3.8 V V 0.013 0.025 V/s 60 18 17 kHz 14 13 21 20 110 2.2 mV mV mV A A dB 2 2.2 V The l denotes the specifications which apply over the full operating temperature range. VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, -40C TA 85C for I-grades, unless otherwise noted. (Note 6) SYMBOL PARAMETER CONDITIONS MIN LT2178AI TYP MAX LT2178I/LT2179I MIN TYP MAX UNITS VOS Input Offset Voltage LT2178 LT2179 l l 70 80 270 300 95 100 370 400 V V VOS T Input Offset Voltage Drift LT2178 (Note 5) LT2179 l 0.4 0.5 1.8 3 0.5 0.6 2.3 3.5 V/C V/C IOS Input Offset Current l 0.07 0.70 0.1 1 nA IB Input Bias Current l 3 7 4 8 nA CMRR Common Mode Rejection Ratio VCM = 0.05V to 3.2V l 86 100 84 98 dB PSRR Power Supply Rejection Ratio VS = 3V to 12V l 88 100 86 100 dB 21789fc 3 LT2178/LT2179 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range. VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, -40C TA 85C for I-grades, unless otherwise noted. (Note 6) SYMBOL PARAMETER AVOL IS CONDITIONS MIN Large-Signal Voltage Gain VO = 0.05V to 4V, No Load (Note 3) VO = 0.05V to 3.5V, RL = 50k l l Maximum Output Voltage Swing Output Low, No Load Output Low, ISINK = 100A l l Output High, No Load Output High, 2k to GND l l 75 40 350 130 9 160 3.9 3 l Supply Current per Amplifier LT2178AI TYP MAX 50 30 13 220 4.2 3.7 15 LT2178I/LT2179I MIN TYP MAX 350 130 9 160 3.9 3 24 UNITS V/mV V/mV 13 220 4.2 3.7 mV mV V V 15 27 A The l denotes the specifications which apply over the full operating temperature range. VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, 0C TA 70C, unless otherwise noted. (Note 7) SYMBOL PARAMETER CONDITIONS LT2178AC/LT2179AC MIN TYP MAX LT2178C/LT2179C MIN TYP MAX UNITS VOS Input Offset Voltage LT2178 LT2179 l l 50 60 170 200 65 70 250 290 V/mV V/mV VOS T Input Offset Voltage Drift LT2178 (Note 5) LT2179 l l 0.4 0.5 1.8 3 0.5 0.6 2.5 3.5 mV mV IOS Input Offset Current l 0.06 0.35 0.06 0.5 nA IB Input Bias Current l 3 6 3 7 nA CMRR Common Mode Rejection Ratio VCM = 0V to 3.4V l 90 101 86 100 dB PSRR Power Supply Rejection Ratio VS = 2.5V to 12V l 90 102 88 102 dB AVOL Large-Signal Voltage Gain VO = 0.05V to 4V, No Load (Note 3) VO = 0.05V to 3.5V, RL = 50k l l 150 55 500 160 80 45 500 160 V/mV V/mV Maximum Output Voltage Swing Output Low, No Load Output Low, ISINK = 100A l l Output High, No Load Output High, 2k to GND l l 8 140 4.1 3.3 11 190 4.3 3.8 8 140 4.1 3.3 11 190 4.3 3.8 mV mV V V VS = 15V, TA = 25C, unless otherwise noted. SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage LT2178 LT2179 IOS Input Offset Current IB Input Bias Current Input Voltage Range LT2178AC/LT2178AI LT2179AC MIN TYP MAX LT2178C/LT2178I LT2179C/LT2179I MIN TYP MAX 70 80 300 350 90 100 400 450 0.05 0.25 0.05 0.35 nA 3 5 3 6 nA UNITS V V 13.5 -15 13.9 -15.3 13.5 -15 13.9 -15.3 V V CMRR Common Mode Rejection Ratio VCM = 13.5V to -15V 96 106 93 106 dB PSRR Power Supply Rejection Ratio VS = 5V, 0V to 18V 96 112 94 112 dB AVOL Large-Signal Voltage Gain VO = 10V, RL = 50k VO = 10V, No Load 300 600 1200 2500 250 400 1000 2500 V/mV V/mV VOUT Maximum Output Voltage Swing RL = 50k RL = 2k 13 11 14.2 12.7 13 11 14.2 12.7 V V SR Slew Rate AV = 1 0.02 0.04 0.02 0.04 V/s 21789fc 4 LT2178/LT2179 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range. VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, -40C TA 85C for I-grades, unless otherwise noted. (Note 6) SYMBOL PARAMETER CONDITIONS GBW Gain Bandwidth Product fO 5kHz IS Supply Current per Amplifier LT2178AC/LT2178AI LT2179AC MIN TYP MAX LT2178C/LT2178I LT2179C/LT2179I MIN TYP MAX 85 85 16 21 17 UNITS kHz 25 A The l denotes the specifications which apply over the full operating temperature range. VS = 15V, -40C TA 85C for I-grades, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN LT2178AI TYP MAX LT2178I/LT2179I MIN TYP MAX UNITS VOS Input Offset Voltage LT2178 LT2179 l l 100 100 650 650 130 130 740 740 V V VOS T Input Offset Voltage Drift LT2178 (Note 5) LT2179 l 0.6 0.7 1.8 3 0.7 0.9 2.5 4 V/C V/C IOS Input Offset Current l 0.07 0.7 0.1 1 nA IB Input Bias Current l 3 7 4 8 nA AVOL Large-Signal Voltage Gain VO = 10V, RL = 50k l 150 500 100 500 V/mV CMRR Common Mode Rejection Ratio VCM = 13V, -14.9V l 90 105 88 103 dB Power Supply Rejection Ratio VS = 0V, 5V to 18V l 92 110 88 109 dB Maximum Output Voltage Swing RL = 5k l 11 13.5 11 13.5 V PSRR IS l Supply Current per Amplifier 18 28 19 30 A The l denotes the specifications which apply over the full operating temperature range. VS = 15V, 0C TA 70C, unless otherwise noted. SYMBOL PARAMETER CONDITIONS LT2178AC/LT2179AC MIN TYP MAX LT2178C/LT2179C MIN TYP MAX UNITS VOS Input Offset Voltage LT2178 LT2179 l l 100 120 480 550 130 150 660 750 V V VOS T Input Offset Voltage Drift LT2178 (Note 5) LT2179 l 0.6 0.7 1.5 3 0.7 0.9 2.5 4 V/C V/C IOS Input Offset Current l 0.06 0.35 0.06 0.35 nA IB Input Bias Current l 3 6 3 7 nA AVOL Large-Signal Voltage Gain VO = 10V, RL = 50k l 200 800 150 750 V/mV CMRR Common Mode Rejection Ratio VCM = 13V, -15V l 94 104 91 104 dB Power Supply Rejection Ratio RL = 5k l 93 110 91 110 dB Maximum Output Voltage Swing RL = 5k l 11 13.6 11 13.6 V PSRR IS Supply Current per Amplifier 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: Typical parameters are defined as the 60% yield of parameter distributions of individual amplifiers, i.e., out of 100 LT2179s (or 100 LT2178s) typically 240 op amps (or 120) will be better than the indicated specification. Note 3: This parameter is tested on a sample basis only. All noise parameters are tested with VS = 2.5V, VO = 0V. l 17 24 18 28 A Note 4: This parameter is guaranteed by design and is not tested. Note 5: Power supply rejection ratio is measured at the minimum supply voltage. The op amps actually work at 1.7V supply but with a typical offset skew of -300V. Note 6: This parameter is not 100% tested. Note 7: During testing at -40C, the 5V power supply turn-on time is less than 0.5s. Note 8: The LT2178C/LT2179C are designed, characterized and expected to meet the industrial temperature limits, but are not tested at -40C and 85C. I-grade parts are guaranteed. 21789fc 5 LT2178/LT2179 TYPICAL PERFORMANCE CHARACTERISTICS Distribution of Input Offset Voltage 100 800 200 -50 0 50 OFFSET VOLTAGE (V) 100 150 25 25C -2.5 -40C -300 NONFUCTIONAL -500 0 SATURATION VOLTAGE (mV) ISINK = 100A 100 ISINK = 1A 10 NO LOAD 10k TO GROUND 1 2k TO GROUND 0.1 -50 0 25 50 TEMPERATURE (C) 75 Short-Circuit Current TA = 25C, VS = p2.5V VS = p15V 10 VS = p2.5V VS = 5V, 0V 0 VS = p2.5V -10 VS = p15V -20 40 60 80 TIME (SECONDS) Noise Spectrum NOISE VOLTAGE (0.4V/DIV) VOLTAGE NOISE DENSITY (nVHz) CURRENT NOISE DENSITY (fAHz) 100 120 21789 G07 2 10 4 6 8 TIME (SECONDS) Voltage Gain vs Frequency 140 TA = 25C VS = p2.5V 300 TA = 25C 120 CURRENT NOISE 100 VOLTAGE NOISE 30 10 0.1 100 80 VS = p15V 60 VS = 5V, 0V 40 20 1/f CORNER 0.5Hz 1 12 21789 G06 1000 CHANNEL B 20 0 21789 G05 0.01Hz to 10Hz Noise 0 CHANNEL A CHANNEL B 21789 G04 CHANNEL A 100 75 0.1Hz to 10Hz Noise 2 0 1 TIME FROM OUTPUT SHORT TO GROUND (MINUTES) 100 TA = 25C, VS = p2.5V 50 25 0 TEMPERATURE (C) 21789 G03 -30 -25 -25 20 SHORT CIRCUIT CURRENT (mA) SINKING SOURCING VS = 5V, 0V IB -3.5 21789 G02 Output Saturation vs Temperature vs Sink Current ISINK = 1mA -3.0 -4.0 -50 2 3 1 POSITIVE SUPPLY VOLTAGE (V) 21789 G01 1000 IOS 50 NOISE VOLTAGE (0.4V/DIV) -100 75 85C -200 -400 0 -150 VS = 5V, 0V INPUT OFFSET CURRENT (pA) -100 INPUT BIAS CURRENT (nA) 400 0 VOLTAGE GAIN (dB) 600 100 V- = 0V VS = 5V, 0V TA = 25C 2500 OP AMPS TESTED OFFSET VOLTAGE SHIFT (V) NUMBER OF OP AMPS Input Bias and Offset Currents vs Temperature Minimum Supply Voltage 0 10 100 FREQUENCY (Hz) 1000 21789 G08 -20 0.001 0.01 0.1 1 10 100 1k 10k 100k 1M FREQUENCY (Hz) 217879 G09 21789fc 6 LT2178/LT2179 TYPICAL PERFORMANCE CHARACTERISTICS Gain, Phase vs Frequency Voltage Gain vs Load Resistance 10 160 180 GAIN 5V, 0V -10 10k PHASE SHIFT (DEG) 140 1M 100k 200 VS = 5V, 0V, TA = 25C VS = 5V, 0V, TA = 85C 10k 10k 240 1M 100k FREQUENCY (Hz) 100k 1M LOAD RESISTANCE TO GROUND () 60 AV = 1 40 0 10M 10 AV = 10 100 1000 CAPACITIVE LOAD (pF) 10000 20789 G12 Large-Signal Transient Response VS = 5V, 0V Small-Signal Transient Response VS = 2.5V 1V/DIV 20mV/DIV Large-Signal Transient Response VS = 15V 5V/DIV AV = 5 217879 G11 21789 G10 AV = 1 CL = 12pF 80 20 220 GAIN p15V VS = 5V, 0V 100 OVERSHOOT (%) 120 PHASE 5V, 0V, 0 VS = p15V, TA = 25C 100 VOLTAGE GAIN (V/V) 20 AV = 1 100s/DIV CL = 12pF INPUT PULSE = 0V TO 3.8V 500s/DIV 21789 G13 AV = 1 CL = 12pF 20s/DIV 21789 G15 21789 G14 Small-Signal Transient Response VS = 5V, 0V Small-Signal Transient Response VS = 15V Common Mode Rejection Ratio vs Frequency 20mV/DIV COMMON MODE REJECTION RATIO (dB) 120 20mV/DIV VOLTAGE GAIN (dB) TA = 25C NO LOAD PHASE p15V Capacitive Load Handling 120 10M 80 30 AV = 1 CL = 12pF 20s/DIV 21789 G16 AV = 1 20s/DIV CL = 12pF INPUT PULSE = 50mV TO 150mV TA = 25C 100 80 VS = 5V, 0V VS = p15V 60 40 20 0 21789 G17 1 10 100 1k FREQUENCY (Hz) 10k 100k 21789 G18 21789fc 7 LT2178/LT2179 TYPICAL PERFORMANCE CHARACTERISTICS Power Supply Rejection Ratio vs Frequency Closed Loop Output Impedance 120 10k POSITIVE SUPPLY 80 PSRR (dB) OUTPUT IMPEDANCE () 100 NEGATIVE SUPPLY 60 40 20 TA = 25C VS = p2.5V + 1VP-P SINE WAVE TA = 25C VS = 5V, 0V IL = 0 1k ACL = 100 100 ACL = 1 ACL = 10 10 1 0 0.1 10k 10 100 1k 1 OPERATING FREQUENCY (Hz) 100k 10 100 10k 1k FREQUENCY (Hz) 21789 G19 100k 21789 G20 SIMPLIFIED SCHEMATIC 1/2 LT2178 1/4 LT2179 V+ 10k 10k 2.2k 5.6k Q54 1 Q16 Q6 Q5 Q14 Q15 11.5k 33k 6.4k 1.3k 2 1 Q32 Q52 Q47 Q4 8.6k Q12 4 Q11 Q37 Q29 Q3 Q46 Q30 Q24 1 V- 3 Q40 3k Q25 Q35 C1 50pF V Q26 C4 4pF 1 2.9k 30 Q44 C5 2.5pF Q27 IN+ 600 600 Q41 + OUT IN- 12.5k Q53 Q1 Q21 150k Q18 Q28 Q2 Q22 V+ Q31 C3 40pF J1 Q36 Q33 Q48 Q19 Q50 Q42 Q49 Q39 Q9 Q23 Q10 Q17 C2 175pF Q7 Q8 V+ Q34 6.2k 6.2k 9.1k Q45 Q20 2A 3k Q51 Q55 10k Q38 30 700k Q43 2A 5.35k 700k 21789 SS V- 21789fc 8 LT2178/LT2179 APPLICATIONS INFORMATION Please see the LT2078/LT2079 data sheet for applications information. All comments relating to specifications, single supply operation and phase reversal protection are directly applicable to the LT2178/LT2179. Micropower 100Hz to 1MHz V-to-F Converter 7V TO 10V 1.5M VIN 0V TO 5V 100k 220k* 50k 1MHz TRIM 100Hz TRIM 240k TYP 2k 1N4148 NC + 47k A1 1/2 LT2178 - 0.33F Q8 2N3906 10M LTC(R)201 1N1 S1 500pF POLYSTYRENE S3 D1 D3 D2 D4 S2 S4 A2 1/2 LT2178 - LT1004-2.5 VDD CLK 3pF 1F 10k Q7 2N3904 0.01F 2F 100 + 1F 12k Q7 CD4024 RESET 74C14 0.022F + + VSS FOUT V+ 1N3 1N4 1N2 LINEARITY IS 0.02% QUIESCENT CURRENT IS 90A SUPPLY CURRENT IS 360A AT 1MHz DRIFT = 50ppm/C *TRWMTR/5 + 120ppm/C V- GND 21789 TA03 21789fc 9 LT2178/LT2179 PACKAGE DESCRIPTION S8 Package 8-Lead Plastic Small Outline (Narrow 0.150) (Reference LTC DWG # 05-08-1610) .189 - .197 (4.801 - 5.004) NOTE 3 7 6 .045 p .005 .050 BSC 8 .245 MIN 5 .160 p .005 .150 - .157 (3.810 - 3.988) NOTE 3 .228 - .244 (5.791 - 6.197) .030 p .005 TYP 1 RECOMMENDED SOLDER PAD LAYOUT .010 - .020 s 45o (0.254 - 0.508) 3 2 4 .053 - .069 (1.346 - 1.752) .008 - .010 (0.203 - 0.254) .004 - .010 (0.101 - 0.254) 0o- 8o TYP .016 - .050 (0.406 - 1.270) .050 (1.270) BSC .014 - .019 (0.355 - 0.483) TYP NOTE: 1. DIMENSIONS IN INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) SO8 0303 S Package 14-Lead Plastic Small Outline (Narrow 0.150) (Reference LTC DWG # 05-08-1610) .337 - .344 (8.560 - 8.738) NOTE 3 .045 p .005 .050 BSC 14 N 12 11 10 9 8 N .245 MIN .160 p .005 .150 - .157 (3.810 - 3.988) NOTE 3 .228 - .244 (5.791 - 6.197) 1 .030 p .005 TYP 13 2 3 N/2 N/2 RECOMMENDED SOLDER PAD LAYOUT 1 .010 - .020 s 45o (0.254 - 0.508) .008 - .010 (0.203 - 0.254) 2 3 4 5 6 .053 - .069 (1.346 - 1.752) .004 - .010 (0.101 - 0.254) 0o - 8o TYP .016 - .050 (0.406 - 1.270) NOTE: 1. DIMENSIONS IN INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE .014 - .019 (0.355 - 0.483) TYP 7 .050 (1.270) BSC 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) S14 0502 21789fc 10 LT2178/LT2179 REVISION HISTORY (Revision history begins at Rev C) REV DATE DESCRIPTION C 3/10 Correct the part numbers on S Package in the Order Information Section. PAGE NUMBER 2 Update to graph G04 6 21789fc 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. 11 LT2178/LT2179 TYPICAL APPLICATION Single Supply, 1kHz, 4th Order Butterworth Lowpass Filter C1 1000pF R1 301k VIN C2 1000pF 1000pF - 1/4 LT2179 R2 86k 1000pF - 121k 1/4 LT2179 + - 221k 1/4 LT2179 + - 1/4 LT2179 + 301k VOUT + 121k 50k 21789 TA04 3.3V 50k + 1F 10 12-BIT ACCURATE SIGNAL RANGE FROM 6mV TO 1.8V ON 3.3V SINGLE SUPPLY. MAXIMUM OUTPUT OFFSET ERROR IS 448V. 0 -10 FOR EACH 2ND ORDER SECTION: -20 1 C1C2R1R2 1 R1 = WOQC1 Q R2 = WOC2 GAIN(dB) WO2 = -30 -40 -50 -60 -70 -80 -90 0.1 1 FREQUENCY (kHz) 10 21789 TA05 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1078/LT1079 Dual/Quad 55A Max, Single Supply Precision Op Amps 70V VOS Max and 2.5V/C Drift Max, 200kHz BBW, 0.07V/s Slew Rate, Input/Output Common Mode Includes Ground LT1211/LT1212 14MHz, 7V/s Single Supply Dual and Quad Precision Op Amps 275V VOS Max, 6V/C Drift Max Input Voltage Range Includes Ground LT1490/LT1491 Dual/ Quad Micropower Rail-to-Rail Input and Output Op Amps Single Supply Input Range: -0.4V to 44V, Micropower 50A Amplifier, Rail-to-Rail Input and Output, 200kHz GBW LT2078/LT2079 Dual/Quad 55A Max, Single Supply Precision Op Amps 70V VOS Max and 2.5V/C Drift Max, 200kHz BBW, 0.07V/s Slew Rate, Input/Output Common Mode Includes Ground Surface Mount Standard Pinout 21789fc 12 Linear Technology Corporation LT 0310 REV C * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com (c) LINEAR TECHNOLOGY CORPORATION 1996