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17µA Max, Dual and Quad, Single Supply, Precision Op Amps

FEATURES

n SO Package with Standard Pinout n Supply Current per Amplifier: 17µA Max n Offset Voltage: 70µV Max n Offset Current: 250pA Max n Input Bias Current: 5nA Max n Voltage Noise: 0.9µVP-P, 0.1Hz to 10Hz n Current Noise: 1.5pAP-P, 0.1Hz to 10Hz n Offset Voltage Drift: 0.5µV/°C n Gain Bandwidth Product: 85kHz n Slew Rate: 0.04V/µs n Single Supply Operation Input Voltage Range Includes Ground Output Swings to Ground while Sinking Current No Pull-Down Resistors Needed n Output Sources and Sinks 5mA Load Current DESCRIPTIONU The LT 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 opera- tion at 5V. Specifications are also provided at ±15V supply. The extremely low supply current is combined with true precision specifications: offset voltage is 30µV and offset current is 50pA. Both offset parameters have low drift with temperature. The 1.5pA P-P current noise and picoampere offset current permit the use the megohm level source resistors without introducing serious errors. Voltage noise, at 0.9µV P-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. 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. n Battery- or Solar-Powered Systems Portable Instrumentation Remote Sensor Amplifier Satellite Circuitry n Micropower Sample-and-Hold n Thermocouple Amplifier n Micropower Filters APPLICATIONSU , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATIONU Self-Buffered, Dual Output, Micropower Reference Supply Current vs Temperature 1/2 LT2178 1 0.1µF 250k 1M* 1M*LT1004-1.2 0.1µF 1.2365V OUTPUT 1/2 LT2178 2.470V OUTPUT 4V TO 9V LT2178/79 • TA01 TOTAL BATTERY CURRENT = 28 µA OUTPUT ACCURACY = –0.4% MAX TEMPERATURE COEFFICIENT = 20ppm/ °C LOAD REGULATION = 25ppm/mA, I L ≤ 5mA, V+ ‡ 5V LINE REGULATION = 10ppm/V * 0.1% FILM RESISTORS TEMPERATURE (°C) –50 SUPPLY CURRENT PER AMPLIFIER (µA) –25 0 25 50 LT2178/79 • TPC02 100 VS = –15V VS = 5V, 0V VS = –1.5V

ABSOLUTE MAXIMUM RATINGSW WW U Specified Temperature Range TJMAX = 150°C, θJA = 150°C/ WTJMAX = 150°C, θJA = 190°C/ W Consult factory for Military grade parts. VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 25°C, unless otherwise noted. LT2178AC/LT2178AI LT2178C/LT2178I LT2179AC/LT2179AI LT2179C/LT2179I SYMBOL PARAMETER CONDITIONS (NOTE 1) MIN TYP MAX MIN TYP MAX UNITS VOS Input Offset Voltage LT2178 30 70 40 120 µV LT2179 35 100 40 150 µV ΔVOS Long Term Input Offset 0.5 0.6 µV/Mo ΔTime Voltage Stability 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 µVP-P Input Noise Voltage Density f O = 10Hz (Note 2) 50 75 50 nV √Hz fO = 1000Hz (Note 2) 49 65 49 nV √Hz in Input Noise Current 0.1Hz to 10Hz (Note 2) 1.5 2.5 1.5 pA P-P Input Noise Current Density f O = 10Hz (Note 2) 0.03 0.07 0.03 pA √Hz fO = 1000Hz 0.01 0.01 pA √Hz Input Resistance (Note 3) Differential Mode 0.8 2.0 0.6 2.0 G Ω Common Mode 12 12 G Ω Input Voltage Range 3.5 3.9 3.5 3.9 V 0 –0.3 0 –0.3 V CMRR Common Mode Rejection Ratio V CM = 0V to 3.5V 93 103 90 102 dB PSRR Power Supply Rejection Ratio V S = 2.2V to 12V 94 104 92 104 dB

ELECTRICAL CHARACTERISTICS

PACKAGE/ORDER INFORMATIONW UU ORDER PART NUMBER LT2179ACS LT2179AIS LT2179CS LT2179IS TOP VIEW OUT B –IN B +IN B OUT A –IN A +IN A S8 PACKAGE 8-LEAD PLASTIC SO A B TOP VIEW S PACKAGE 14-LEAD PLASTIC SO OUT A –IN A +IN A V +IN B –IN B OUT B OUT D –IN D +IN D V +IN C –IN C OUT C A + D B C

ELECTRICAL CHARACTERISTICSVS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 25°C, unless otherwise noted. LT2178AC/LT2178AI LT2178C/LT2178I LT2179AC/LT2179AI LT2179C/LT2179I SYMBOL PARAMETER CONDITIONS (NOTE 1) MIN TYP MAX MIN TYP MAX UNITS AVOL Large-Signal Voltage Gain V O = 0.03V to 4V, No Load (Note 3) 140 700 110 700 V/mV VO = 0.03V to 3.5V, RL = 50k 80 200 70 200 V/mV Maximum Output Voltage Output Low, No Load 6.5 9 6.5 9 mV Swing Output Low, 2k to GND 0.2 0.6 0.2 0.6 mV Output Low, ISINK = 100µA 120 160 120 160 mV Output High, No Load 4.2 4.4 4.2 4.4 V Output High, 2k to GND 3.5 3.8 3.5 3.8 V SR Slew Rate A V = 1, CL = 10pF (Note 3) 0.013 0.025 0.013 0.025 V/ µs GBW Gain Bandwidth Product f O ≤ 5kHz 60 60 kHz IS Supply Current per Amplifier 13 18 14 21 µA VS = ±1.5V, VO = 0V 12 17 13 20 µA Channel Separation ΔVIN = 3V, RL = 10k 110 110 dB Minimum Supply Voltage (Note 4) 2.0 2.2 2.0 2.2 V VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, – 40°C ≤ TA ≤ 85°C for I grades, unless otherwise noted. (Note 6) LT2178AI/LT2179AI LT2178I/LT2179I SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS VOS Input Offset Voltage LT2178 l 70 270 95 370 µV LT2179 l 80 300 100 400 µV ΔVOS Input Offset Voltage Drift LT2178 (Note 5) l 0.4 1.8 0.5 2.5 µV/°C ΔT LT2179 0.5 3.0 0.6 3.5 µV/°C IOS Input Offset Current l 0.07 0.70 0.1 1.0 nA IB Input Bias Current l 37 48 n A CMRR Common Mode Rejection Ratio V CM = 0.05V to 3.2V l 86 100 84 98 dB PSRR Power Supply Rejection Ratio V S = 3V to 12V l 88 100 86 100 dB AVOL Large-Signal Voltage Gain V O = 0.05V to 4V, No Load (Note 3) l 75 350 50 350 V/mV VO = 0.05V to 3.5V, RL = 50k l 40 130 30 130 V/mV Maximum Output Voltage Output Low, No Load l 9 13 9 13 mV Swing Output Low, I SINK = 100µA l 160 220 160 220 mV Output High, No Load l 3.9 4.2 3.9 4.2 V Output High, 2k to GND l 3.0 3.7 3.0 3.7 V IS Supply Current per Amplifier l 15 24 15 27 µA LT2178AC/LT2179AC LT2178C/LT2179C SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS VOS Input Offset Voltage LT2178 l 50 170 65 250 µV LT2179 l 60 200 70 290 µV ΔVOS Input Offset Voltage Drift LT2178 (Note 5) l 0.4 1.8 0.5 2.5 µV/°C ΔT LT2179 0.5 3.0 0.6 3.5 µV/°C IOS Input Offset Current l 0.06 0.35 0.06 0.50 nA IB Input Bias Current l 36 37 n A CMRR Common Mode Rejection Ratio V CM = 0V to 3.4V l 90 101 86 100 dB PSRR Power Supply Rejection Ratio V S = 2.5V to 12V l 90 102 88 102 dB VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, 0°C ≤ TA ≤ 70°C, unless otherwise noted. (Note 7)

LT2178AC/LT2179AC LT2178C/LT2179C SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS AVOL Large-Signal Voltage Gain V O = 0.05V to 4V, No Load (Note 3) l 150 500 80 500 V/mV VO = 0.05V to 3.5V, RL = 50k l 55 160 45 160 V/mV Maximum Output Voltage Output Low, No Load l 8 11 8 11 mV Swing Output Low, I SINK = 100µA l 140 190 140 190 mV Output High, No Load l 4.1 4.3 4.1 4.3 V Output High, 2k to GND l 3.3 3.8 3.3 3.8 V IS Supply Current per Amplifier l 14 21 15 24 µA VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, 0°C ≤ TA ≤ 70°C, unless otherwise noted. VS = ± 15V, TA = 25°C, unless otherwise noted. LT2178AC/LT2178AI LT2178C/LT2178I LT2179AC/LT2179AI LT2179C/LT2179I SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS VOS Input Offset Voltage LT2178 70 300 90 400 µV LT2179 80 350 100 450 µV IOS Input Offset Current 0.05 0.25 0.05 0.35 nA IB Input Bias Current 3 5 3 6 nA Input Voltage Range 13.5 13.9 13.5 13.9 V CMRR Common Mode Rejection Ratio V CM = 13.5V to –15V 96 106 93 106 dB PSRR Power Supply Rejection Ratio V S = 5V, 0V to ±18V 96 112 94 112 dB AVOL Large-Signal Voltage Gain V O = ±10V, RL = 50k 300 1200 250 1000 V/mV VO = ±10V, No Load 600 2500 400 2500 V/mV VOUT Maximum Output Voltage R L = 50k ±13.0 ±14.2 ±13.0 ±14.2 V Swing R L = 2k ±11.0 ±12.7 ±11.0 ±12.7 V SR Slew Rate A V = 1 0.02 0.04 0.02 0.04 V/ µs GBW Gain Bandwidth Product f O ≤ 5kHz 85 85 kHz IS Supply Current per Amplifier 16 21 17 25 µA VS = ± 15V, – 40°C ≤ TA ≤ 85°C for I grades, unless otherwise noted. LT2178AI/LT2179AI LT2178I/LT2179I SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS VOS Input Offset Voltage LT2178 l 100 650 130 740 µV LT2179 l 100 650 130 740 µV ΔVOS Input Offset Voltage Drift LT2178 (Note 5) l 0.6 1.8 0.7 2.5 µV/°C ΔT LT2179 0.7 3.0 0.9 4.0 µV/°C IOS Input Offset Current l 0.07 0.70 0.1 1.0 nA IB Input Bias Current l 37 48 n A AVOL Large-Signal Voltage Gain V O = ±10V, RL = 50k l 150 500 100 500 V/mV CMRR Common Mode Rejection Ratio V CM = 13V, –14.9V l 90 105 88 103 dB PSRR Power Supply Rejection Ratio V S = 0V, 5V to ±18V l 92 110 88 109 dB Maximum Output Voltage Swing R L = 5k l ±11.0 ±13.5 ±11.0 ±13.5 V IS Supply Current per Amplifier l 18 28 19 30 µA

ELECTRICAL CHARACTERISTICS VS = ± 15V, 0°C ≤ TA ≤ 70°C, unless otherwise noted. LT2178AC/LT2179AC LT2178C/LT2179C SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS VOS Input Offset Voltage LT2178 l 100 480 130 660 µV LT2179 l 120 550 150 750 µV ΔVOS Input Offset Voltage Drift LT2178 (Note 5) l 0.6 1.8 0.7 2.5 µV/°C ΔT LT2179 0.7 3.0 0.9 4.0 µV/°C IOS Input Offset Current l 0.06 0.35 0.06 0.35 nA IB Input Bias Current l 36 37 n A AVOL Large-Signal Voltage Gain V O = ±10V, RL = 50k l 200 800 150 750 V/mV CMRR Common Mode Rejection Ratio V CM = 13V, –15V l 94 104 91 104 dB PSRR Power Supply Rejection Ratio V S = 5V, 0V to ±18V l 93 110 91 110 dB Maximum Output Voltage Swing R L = 5k l ± 11.0 ±13.6 ±11.0 ±13.6 V IS Supply Current per Amplifier l 17 24 18 28 µA The l denotes specifications which apply over the full operating temperature range. Note 1: 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 2: This parameter is tested on a sample basis only. All noise parameters are tested with V S = ±2.5V, VO = 0V. Note 3: This parameter is guaranteed by design and is not tested. Note 4: 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 –300µV. Note 5: This parameter is not 100% tested. Note 6: During testing at –40°C, the 5V power supply turn-on time is less than 0.5s. Note 7: The LT2178C/LT2179C are designed, characterized and expected to meet the industrial temperature limits, but are not tested at –40 °C and 85°C. I-grade parts are guaranteed. TYPICAL PERFORMANCE CHARACTERISTICS UW Distribution of Input Offset Voltage POSITIVE SUPPLY VOLTAGE (V) OFFSET VOLTAGE SHIFT (µV) 100 –100 –200 –300 –400 –500 LT2178/79 • TPC02 1 23 V– = 0V NONFUCTIONAL –40 °C 25°C 85°C TEMPERATURE (°C) –50 25 75 LT2178/79 • TPC03 –2.5 –3.0 –25 0 50 100 –3.5 –4.0 INPUT OFFSET CURRENT (pA) INPUT BIAS CURRENT (nA) 100 IOS IB VS = 5V, 0V Minimum Supply Voltage Input Bias and Offset Currents vs Temperature OFFSET VOLTAGE (µV) –150 NUMBER OF OP AMPS200 400 600 800 –100 –50 0 50 LT2178/79 • TPC01 100 150 VS = 5V, 0V TA = 25°C

2500 OP AMPS

TYPICAL PERFORMANCE CHARACTERISTICS UW 0.1Hz to 10Hz NoiseShort-Circuit Current Output Saturation vs Temperature vs Sink Current TEMPERATURE (°C) SATURATION VOLTAGE (mV) 1000 100 0.1 –50 0 25 50 75 100 LT2178/79 • TPC04 –25 ISINK = 1mA ISINK = 100µA ISINK = 1µA NO LOAD 10k TO GROUND 2k TO GROUND VS = 5V, 0V TIME FROM OUTPUT SHORT TO GROUND (MINUTES) SHORT CIRCUIT CURRENT (mA) SINKING SOURCING –10 –20 –30 LT2178/79 • TPC05 VS = –15V VS = –15V VS = – 2.5V VS = – 2.5VVS = 5V, 0V TIME (SECONDS) NOISE VOLTAGE (0.4µV/DIV) 2 468 10 12 CHANNEL A CHANNEL B TA = 25°C, VS = –2.5V LTC2178/79 • TPC06 Voltage Gain vs FrequencyNoise Spectrum0.01Hz to 10Hz Noise TIME (SECONDS) NOISE VOLTAGE (0.4µV/DIV) 20 40 60 80 LTC2178/79 • TPC07 100 120 CHANNEL A CHANNEL B TA = 25°C, VS = –2.5V FREQUENCY (Hz) 0.1 VOLTAGE NOISE DENSITY (nV√Hz) CURRENT NOISE DENSITY (fA√Hz) 100 300 1000 1 1000 10010 LT2178/79 • TPC08 TA = 25°C VS = – 2.5V CURRENT NOISE VOLTAGE NOISE 1/f CORNER 0.5Hz FREQUENCY (Hz) 0.001 VOLTAGE GAIN (dB) 100k LT2178/79 • TPC09 0.1 10 1k0.01 1M 1 100 10k 140 120 100 –20 VS = –15V VS = 5V, 0V TA = 25°C Capacitive Load HandlingGain, Phase vs Frequency FREQUENCY (Hz) –10 100k LT2178/79 • TPC10 VOLTAGE GAIN (dB) PHASE SHIFT (DEG) 10k 1M 100 120 140 160 180 200 220 240 TA = 25°C NO LOADPHASE –15V PHASE 5V, 0V, GAIN 5V, 0V GAIN –15V LOAD RESISTANCE TO GROUND (Ω ) 10k 10k VOLTAGE GAIN (V/V)100k 10M 100k 1M 10M LT2178/79 • TPC11 VS = –15V, TA = 25°C VS = 5V, 0V, TA = 25°C VS = 5V, 0V, TA = 85°C Voltage Gain vs Load Resistance CAPACITIVE LOAD (pF) OVERSHOOT (%) 120 100 100 1000 10000 LT2078/79 • TPC12 VS = 5V, 0V AV = 1 AV = 5 AV = 10

TYPICAL PERFORMANCE CHARACTERISTICS UW Small-Signal Transient Response VS = ±2.5V Large-Signal Transient Response VS = 5V, 0V Large-Signal Transient Response VS = ±15V 5V/DIV AV = 1 500 µs/DIV CL = 12pF LT2178/79 • TPC13 1V/DIV AV = 1 100 µs/DIV CL = 12pF INPUT PULSE = 0V TO 3.8V LT2178/79 • TPC14 20mV/DIV AV = 1 20 µs/DIV CL = 12pF LT2178/79 • TPC15 Small-Signal Transient Response VS = ±15V 20mV/DIV AV = 1 20 µs/DIV CL = 12pF LT2178/79 • TPC16 20mV/DIV AV = 1 20 µs/DIV CL = 12pF INPUT PULSE = 50mV TO 150mV LT2178/79 • TPC17 Small-Signal Transient Response VS = 5V, 0V Common Mode Rejection Ratio vs Frequency FREQUENCY (Hz) COMMON MODE REJECTION RATIO (dB) 120 100 10 100 1k 10k LT2178/79 • TPC18 100k TA = 25°C VS = 5V, 0V VS = –15V Power Supply Rejection Ratio vs Frequency OPERATING FREQUENCY (Hz) 0.1 PSRR (dB) 120 100 1 10 100 1k LT2178/79 • TPC19 10k 100k TA = 25°C VS = –2.5V + 1VP-P SINE WAVE NEGATIVE SUPPLY POSITIVE SUPPLY Closed Loop Output Impedance FREQUENCY (Hz) OUTPUT IMPEDANCE (Ω ) 100 10k 100 1k LT2178/79 • TPC20 10k 100k ACL = 100 ACL = 10 ACL = 1 TA = 25°C VS = 5V, 0V IL = 0

10k 10k 2.2k 5.6k Q5 Q6 Q11 600Ω 600Ω Q21 Q22 175pF 6.2k Q28 Q12 Q16 Q14 Q29 Q4 Q24 8.6k C1 50pF 2.5pFQ27 Q10 Q17 6.2k Q19 Q18 Q15 Q32 1.3k 6.4k Q37 Q30 1 3 Q25 4pF 2.9k Q31C3 40pF Q23 Q20 3k 30Ω Q34 Q36 OUT Q26 30Ω Q35 33k Q54 1 1 2 150k Q33 10k Q38 5.35k Q45 Q55 Q51 Q42 Q44 Q46 Q47 11.5k 12.5k Q40 Q41 Q48 9.1k Q43 700k 700k LT2178/79 • SIMPLIFIED SCHEM IN– IN+ Q50 Q49 Q39 Q53 Q52 1/2 LT2178 1/4 LT2179

APPLICATIONS INFORMATIONWU UU Please see the LT2078/LT2079 data sheet for applications information. All comments relating to specifications, single supply operation and phase reversal protection are di- rectly applicable to the LT2178/LT2179. Micropower 100Hz to 1MHz V-to-F Converter + + VIN 0V TO 5V 220k* 50k 1MHz TRIM 100Hz TRIM 240k TYP 2µF 0.33µF 0.022µF 500pF POLYSTYRENE 3pF 0.01µF 47k Q8 2N3906 12k 1.5M NC 2N3904 74C14 1N1 1N3 1N4 1N2 GND FOUT RESET V SS VDD CLK Q7CD4024 1µF 1N4148 1µF 100Ω A2 1/2 LT2178 10k 7V TO 10V 100k LT1004-2.5 LTC®201 1/2 LT2178 LT2178/79 • TA03 10M LINEARITY IS 0.02% QUIESCENT CURRENT IS 90µA SUPPLY CURRENT IS 360µA AT 1MHz DRIFT = 50ppm/°C *TRWMTR/5 + 120ppm/°C

Dimensions in inches (millimeters) unless otherwise noted. 8-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 1 2 3 4 0.150 – 0.157** (3.810 – 3.988) 8 7 6 5 0.189 – 0.197* (4.801 – 5.004) 0.228 – 0.244 (5.791 – 6.197) 0.016 – 0.050 0.406 – 1.270 0.010 – 0.020 0°– 8° TYP 0.008 – 0.010 (0.203 – 0.254) SO8 0695 0.053 – 0.069 (1.346 – 1.752) 0.014 – 0.019 (0.355 – 0.483) 0.004 – 0.010 (0.101 – 0.254) 0.050 (1.270) BSCDIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

Dimensions in inches (millimeters) unless otherwise noted. S Package 14-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 1 2 3 4 0.150 – 0.157** (3.810 – 3.988) 14 13 0.337 – 0.344* (8.560 – 8.738) 0.228 – 0.244 (5.791 – 6.197) 12 11 10 9 5 6 7 0.016 – 0.050 0.406 – 1.270 0.010 – 0.020 0° – 8° TYP 0.008 – 0.010 (0.203 – 0.254) S14 0695 0.053 – 0.069 (1.346 – 1.752) 0.014 – 0.019 (0.355 – 0.483) 0.004 – 0.010 (0.101 – 0.254) 0.050 (1.270) TYP DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 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 represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 l FAX: (408) 434-0507 l TELEX: 499-3977 LT/GP 1196 7K • PRINTED IN USA  LINEAR TECHNOLOGY CORPORA TION 1 996 Single Supply, 1kHz, 4th Order Butterworth Lowpass Filter TYPICAL APPLICATIONU 301k 50k 1000pF 2178/79 TA04 VOUT 1µF 86k VIN 50k LT2179 – LT2179 301k 121k LT2179 1000pF 1000pF 221k 1000pF LT2179 3.3V 121k 12-BIT ACCURATE SIGNAL RANGE FROM 6mV TO 1.8V ON 3.3V SINGLE SUPPLY. MAXIMUM OUTPUT OFFSET ERROR IS 448µV. FOR EACH 2ND ORDER SECTION: W O2 = 1 C1C2R1R2 R1 = 1 WOQC1 R2 = Q WOC2 FREQUENCY (kHz) 0.1 GAIN(dB) –10 –20 –30 –40 –50 –60 –70 –80 –90 11 0 LT2178/79 • TA05 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1078/LT1079 Dual/Quad 55 µA Max, Single Supply Precision Op Amps 70 µV VOS Max and 2.5µV/°C Drift Max, 200kHz BBW, 0.07V/µs Slew Rate, Input/Output Common Mode Includes Ground LT1211/LT1212 14MHz, 7V/ µs Single Supply Dual and Quad Precision Op Amps 275 µV VOS Max, 6µV/°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 50 µA Amplifier, Rail-to-Rail Input and Output, 200kHz GBW LT2078/LT2079 Dual/Quad 55 µA Max, Single Supply Precision Op Amps 70 µV VOS Max and 2.5µV/°C Drift Max, 200kHz BBW, 0.07V/µs Slew Rate, Input/Output Common Mode Includes Ground Surface Mount Standard Pinout