LT1413

LT1413 LINER

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Single Supply Operation: n Input Goes Below Ground n Output Swings to Ground Sinking Current n No Pull-Down Resistors Needed n Phase Reversal Protection At 5V, 0V Low Cost Grade Specifications: n 280µV Max Offset Voltage n 380µV Max in S8 Package n 0.8nA Max Offset Current n 480µA Max Supply Current per Amplifier n 0.5µV/°C Drift n 1.4 Million Voltage Gain n 950kHz Gain-Bandwidth Product n 0.55µVP-P, 0.1Hz to 10Hz Noise The LT1413 is a low cost, upgraded version of Linear Technology’s industry standard LT1013 dual, single sup- ply op amp. The LT1413 is optimized for single 5V appli- cations, although ± 15V specifications are also provided for completeness. In the design of the LT1413, particular emphasis has been placed on low cost plastic and SO-8 package performance: 60µV offset voltage, 0.1nA offset current, in excess of 10mA output current at 330µA supply current and 140dB channel separation are some of the specifications achieved. Other dual, single supply amplifiers are available to complement the LT1413 family: the micropower LT1078’s supply current is 10 times lower with a 4.5 fold speed performance degradation compared to the LT1413. Con- versely, the LT1211, LT1213 and LT1215 duals have 4 to 14 times higher supply current, but also 13 to 50 times higher speed. Protected by U.S. Patent 4,775,884. D UESCRIPTIO Single Supply, Dual Precision Op Amp USA OPPLICATI n Single Supply Systems n Two and Three Op Amp Instrumentation Amplifiers n Active Filters n Battery-Powered Systems n Strain Gauge and Bridge Amplifiers +90V, –3V Common-Mode Range Difference Amplifier (AV = 1) Distribution of Input Offset Voltage (In Plastic DIP, N8 Package) INPUT OFFSET VOLTAGE (µV) –300 PERCENT OF UNITS –200 –100 0 100 LT1413 • TA01 200 300 VS = 5V, 0V TA = 25°C LT1413 • TA03 10M 10M 1M 10M 1/2 LT1413 10M OUTPUT 20mV TO 8V INPUT 1.5mV 125µV) 11M 80kHz OUTPUT OFFSET = (INPUT REFERRED = INPUT RESISTANCE = BANDWIDTH = (THE 0.1nA TYPICAL OFFSET CURRENT PERMITS THE USE OF 1MΩ RESISTORS) UA OPPLICATITYPICAL

SYMBOL PARAMETER CONDITIONS (Note 1) MIN TYP MAX MIN TYP MAX UNITS VOS Input Offset Voltage LT1413N8 50 150 60 280 µV LT1413S8 80 380 µV ΔVOS Long-Term Input Offset 0.4 0.5 µV/Mo ΔTime Voltage Stability IOS Input Offset Current 0.1 0.7 0.1 0.8 nA IB Input Bias Current 9 15 9 18 nA en Input Noise Voltage 0.1Hz to 10Hz (Note 2) 0.55 1.1 0.55 µVP-P Input Noise Voltage Density f O = 10Hz (Note 2) 24 38 24 nV/ √Hz fO = 1000Hz (Note 2) 23 30 23 nV/ √Hz in Input Noise Current 0.1Hz to 10Hz 2.8 2.8 pA P-P Input Noise Current Density f O = 10Hz 0.07 0.07 pA/ √Hz fO = 1000Hz 0.02 0.02 pA/ √Hz Input Resistance (Note 3) Differential Mode 300 500 250 500 M Ω Common Mode 3 3 G Ω Input Voltage Range 3.65 3.8 3.65 3.8 V 0 – 0.3 0 – 0.3 V CMRR Common-Mode Rejection Ratio V CM = 0V to 3.65V 90 101 88 101 dB PSRR Power Supply Rejection Ratio V S = 3.2V to 12V 102 118 100 118 dB AVOL Large-Signal Voltage Gain V O = 0.05V to 4V, No Load 400 1400 350 1400 V/mV VO = 0.05V to 3.5V, RL = 2k 300 1000 250 1000 V/mV TOP VIEW –IN A OUT A OUT B +IN A +IN B –IN B S8 PACKAGE 8-LEAD PLASTIC SOIC A B NOTE: THIS PIN CONFIGURATION DIFFERS FROM THE 8-LEAD DIP PIN LOCATIONS. INSTEAD, IT FOLLOWS THE INDUSTRY STANDARD LT1013DS8 SO PACKAGE CONFIGURATION. A UGWA WU WARBSOLUTEX I T I S Equal to Positive Supply Voltage 5V Below Negative Supply Voltage Note: When the input voltage exceeds the maximum ratings, the input current should be limited to 10mA. WU UPACKAGE/ORDER I FOR ATIO LT1413ACN8 LT1413CN8 ORDER PART NUMBER ORDER PART NUMBER LT1413S8 TJMAX = 105°C, θJA = 200°C/ W S8 PART MARKING 1413 TJMAX = 100°C, θJA = 130°C/W TOP VIEW OUT A –IN A +IN A OUT B –IN B +IN B N8 PACKAGE 8-LEAD PLASTIC DIP A B ELECTRICAL C CHARA TERISTICS LT1413CN8/S8 VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 25°C, unless otherwise noted.

SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS Maximum Output Voltage Swing Output Low, No Load 15 25 15 25 mV Output Low, 600Ω to GND 5 10 5 10 mV Output Low, ISINK = 1mA 220 350 220 350 mV Output High, No Load 4.1 4.4 4.1 4.4 V Output High, 600Ω to GND 3.4 4.0 3.4 4.0 V SR Slew Rate A V = 1 0.2 0.3 0.2 0.3 V/ µs GBW Gain-Bandwidth Product f O ≤ 100kHz (Note 4) 600 950 600 950 kHz IS Supply Current per Amplifier 330 450 330 480 µA Channel Separation ΔVIN = 3V, RL = 2k (Note 5) 125 140 123 140 dB Minimum Supply Voltage (Note 6) 2.85 3.0 2.85 3.0 V ELECTRICAL C CHARA TERISTICS LT1413ACN8 LT1413CN8/S8 SYMBOL PARAMETER CONDITIONS (Note 1) MIN TYP MAX MIN TYP MAX UNITS VOS Input Offset Voltage LT1413N8 l 70 300 85 470 µV LT1413S8 l 110 570 µV ΔVOS/ΔT Input Offset Voltage Drift l 0.3 2.2 0.4 2.8 µV/°C IOS Input Offset Current l 0.2 1.4 0.2 1.7 nA IB Input Bias Current l 11 25 11 30 nA CMRR Common-Mode Rejection Ratio V CM = 0V to 3.4V l 85 99 82 99 dB PSRR Power Supply Rejection Ratio V S = 3.9V to 12V l 98 116 94 116 dB AVOL Large-Signal Voltage Gain V O = 0.08V to 3.8V, No Load l 220 1000 220 1000 V/mV VO = 0.08V to 3.0V, RL = 2k l 150 700 150 700 V/mV Maximum Output Voltage Swing Output Low, No Load l 20 38 20 38 mV Output Low, ISINK = 1mA l 300 480 300 480 mV Output High, No Load l 3.9 4.2 3.9 4.2 V Output High, 600Ω to GND l 3.1 3.8 3.0 3.8 V IS Supply Current per Amplifier l 360 550 360 580 µA VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, 0°C ≤ TA ≤ 70°C, unless otherwise noted. LT1413ACN8 LT1413CN8/S8 SYMBOL PARAMETER CONDITIONS (Note 1) MIN TYP MAX MIN TYP MAX UNITS VOS Input Offset Voltage LT1413N8 l 65 240 80 390 µV LT1413S8 l 100 490 µV ΔVOS/ΔT Input Offset Voltage Drift (Note 5) l 0.3 2.0 0.4 2.5 µV/°C IOS Input Offset Current l 0.1 1.0 0.1 1.2 nA IB Input Bias Current l 10 20 10 23 nA CMRR Common-Mode Rejection Ratio V CM = 0V to 3.6V l 88 100 85 100 dB PSRR Power Supply Rejection Ratio V S = 3.45V to 12V l 100 117 97 117 dB AVOL Large-Signal Voltage Gain V O = 0.07V to 3.9V, No Load l 300 1100 300 1100 V/mV VO = 0.07V to 3.2V, RL = 2k l 200 800 200 800 V/mV Maximum Output Voltage Swing Output Low, No Load l 18 32 18 32 mV Output Low, ISINK = 1mA l 270 430 270 430 mV Output High, No Load l 4.0 4.3 4.0 4.3 V Output High, 600Ω to GND l 3.3 3.9 3.2 3.9 V IS Supply Current per Amplifier l 350 500 350 530 µA VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, TA = 25°C, unless otherwise noted. VS = 5V, 0V, VCM = 0.1V, VO = 1.4V, –40 °C ≤ TA ≤ 85°C (Note 7)

SYMBOL PARAMETER CONDITIONS (Note 1) MIN TYP MAX MIN TYP MAX UNITS VOS Input Offset Voltage LT1413N8 75 280 90 480 µV LT1413S8 110 580 µV IOS Input Offset Current 0.1 0.7 0.1 0.8 nA IB Input Bias Current 8 15 8 18 nA Input Voltage Range 13.5 13.8 13.5 13.8 V CMRR Common-Mode Rejection Ratio V CM = 13.5V, –15V 100 117 97 114 dB PSRR Power Supply Rejection Ratio V S = ±2V to ± 18V 103 120 100 117 dB AVOL Large-Signal Voltage Gain V O = ±10V, RL = 2k 1500 5000 1200 4000 V/mV VOUT Maximum Output Voltage Swing R L = 2k ±13 ±14 ±12.5 ±14 V SR Slew Rate 0.2 0.4 0.2 0.4 V/ µs IS Supply Current per Amplifier 350 500 350 550 µA ELECTRICAL C CHARA TERISTICS LT1413ACN8 LT1413CN8/S8 SYMBOL PARAMETER CONDITIONS (Note 1) MIN TYP MAX MIN TYP MAX UNITS VOS Input Offset Voltage LT1413N8 l 95 390 110 620 µV LT1413S8 l 130 720 µV ΔVOS/ΔT Input Offset Voltage Drift (Note 5) l 0.4 2.5 0.5 3.0 µV/°C IOS Input Offset Current l 0.1 1.0 0.1 1.2 nA IB Input Bias Current l 92 0 92 3 n A AVOL Large-Signal Voltage Gain V O = ±10V, RL = 2k l 1000 4000 700 3000 V/mV CMRR Common-Mode Rejection Ratio V CM = 13V, –15V l 98 116 94 113 dB PSRR Power Supply Rejection Ratio V S = ±2V to ±18V l 101 119 97 116 dB Maximum Output Voltage Swing R L = 2k l ±12.5 ±13.9 ±12.0 ±13.9 V IS Supply Current per Amplifier l 360 550 360 600 µA LT1413ACN8 LT1413CN8/S8 SYMBOL PARAMETER CONDITIONS (Note 1) MIN TYP MAX MIN TYP MAX UNITS VOS Input Offset Voltage LT1413N8 l 100 460 120 700 µV LT1413S8 l 140 800 µV ΔVOS/ΔT Input Offset Voltage Drift l 0.4 2.8 0.5 3.3 µV/°C IOS Input Offset Current l 0.2 1.4 0.2 1.7 nA IB Input Bias Current l 10 25 10 30 nA AVOL Large-Signal Voltage Gain V O = ±10V, RL = 2k l 800 3000 500 2400 V/mV CMRR Common-Mode Rejection Ratio V CM = 13V, –15V l 97 115 92 112 dB PSRR Power Supply Rejection Ratio V S ±2V to ±18V l 100 118 95 115 dB Maximum Output Voltage Swing R L = 2k l ±12.2 ±13.8 ±11.8 ±13.8 V IS Supply Current per Amplifier l 370 580 370 630 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 LT1413s typically 120 op amps will be better than the indicated specification. Note 2: This parameter is tested on a sample basis only. All noise parameters are tested with VS = ± 2.5V, VO = 0V. Note 3: This parameter is guaranteed by design and is not tested. VS = ±15V, TA = 25°C, unless otherwise noted. Note 4: Gain-Bandwidth Product is not tested. It is inferred from the slew rate measurement. Note 5: This parameter is not 100% tested. Note 6: At the minimum supply voltage, the offset voltage changes less than 200µV compared to its value at 5V, 0V. Note 7: The LT1413 is not tested and is not quality-assurance sampled at –40 °C and at 85°C. These specifications are guaranteed by design, correlation and/or inference from 0°C, 25°C and/or 70°C tests. VS = ±15V, –40 °C ≤ TA ≤ 85°C (Note 7) VS = ±15V, 0°C ≤ TA ≤ 70°C, unless otherwise noted.

CCHARA TERISTICSUWATYPICALP E RFOR CE INPUT OFFSET VOLTAGE (µV) –400 PERCENT OF UNITS –200 0 200 400 LT1413 • TA02 –300 –100 100 300 VS = 5V, 0V TA = 25°C Distribution of Input Offset Voltage (In S8 Package) TEMPERATURE (°C) SUPPLY CURRENT PER AMPLIFIER (µA) 350 400 25 100 LT1413 • TA04 300 0–25–50 50 75 VS = 5V, 0V VS = ± 15V Supply Current vs Temperature TEMPERATURE (°C)

0.01 SATURATION VOLTAGE (V)

0.1 0 100 LT1413 • TA05 –25 25 75–50 ISINK = 10mA ISINK = 5mA ISINK = 1mA ISINK = 100µA ISINK = 10µA ISINK = 0 V+ = 5V TO 30V V– = 0V Input Offset Current vs Temperature TEMPERATURE (°C) INPUT BIAS CURRENT (nA) –11 40 100 LT1413 • TA07 0–20–40 60 80 –10 VS = ± 15V 5V, 0V 0.1V VS = VCM = Input Bias Current vs Temperature Output Saturation vs Sink Current vs Temperature INPUT BIAS CURRENT (nA) COMMON-MODE VOLTAGE (V) –10 –16 LT1413 • TA08 –15 –4–20 –12 –14 –10 COMMON-MODE VOLTAGE (V) VS = 5V, 0V TA = 25°C VS = ± 15V Input Bias Current vs Common-Mode Voltage 0.1Hz to 10Hz Noise FREQUENCY (Hz) VOLTAGE NOISE DENSITY (nV/√Hz) CURRENT NOISE DENSITY (fA/ √Hz) 1000 10 1k LT1413 • TA10 100 300 100 TA = 25°C VS = ±2V TO ±18V CURRENT NOISE VOLTAGE NOISE 1/f CORNER 2Hz Noise Spectrum Minimum Supply Voltage POSITIVE SUPPLY VOLTAGE (V) CHANGE IN OFFSET VOLTAGE (µV) 100 200 LT1413 • TA11 324 TA = –40 °C TA = 0°C TA = 25°C TA = 85°C NONFUNCTIONAL V– = 0V TEMPERATURE (°C) INPUT OFFSET CURRENT (pA) 150 250 40 100 LT1413 • TA06 0–20–40 60 80 200 100 VS = ±15V 5V, 0V 0.1V VS = VCM = TIME (SECONDS) NOISE VOLTAGE (200nV/DIV) LT1413 • TA09 4206 8 TA = 25°C VS = ±2V TO ±18V

CCHARA TERISTICSUWATYPICALP E RFOR CE Gain, Phase vs Frequency FREQUENCY (Hz) VOLTAGE GAIN (dB) 140 1k 10M LT1413 • TA12 100.10.01 10k 1M 120 100 –20 1 100 100k VS = 5V, 0V VS = ± 15V TA = CL = 25°C 100pF Voltage Gain vs Frequency FREQUENCY (MHz) VOLTAGE GAIN (dB) 11 0 LT1413 • TA13 –10 0.1 0.3 3 100 PHASE SHIFT (DEGREES)120 140 160 180 200 PHASE ±15VGAIN ±15V 5V, 0V 5V, 0V TA = 25°C VCM = 0.1V CL = 100pF FREQUENCY (Hz) CHANNEL SEPARATION (dB) 100 160 1k 1M LT1413 • TA14 140 10 100 100k 120 10k RS = 100Ω RS = 1kΩ LIMITED BY THERMAL INTERACTION LIMITED BY PIN TO PIN CAPACITANCE TA = VS = VIN = RL = 25°C 5V, 0V 3Vp-p Channel Separation vs Frequency Common-Mode Rejection Ratio vs Frequency Power Supply Rejection Ratio vs Frequency FREQUENCY (Hz) COMMON-MODE REJECTION RATIO (dB) 120 LT1413 • TA15 10 10k 100k TA = 25°C 100 1k VS = 5V, 0V VS = ± 15V 100 FREQUENCY (Hz) POWER SUPPLY REJECTION RATIO (dB) 120 LT1413 • TA16 0.1 1k 100k TA = 25°C 1 100 VS = 5V, 0V 100 NEGATIVE SUPPLY ±15V 10 10k POSITIVE SUPPLY ± 15V Small Signal Transient Response, VS = ±15V Small Signal Transient Response, VS = 5V, 0V Large Signal Transient Response, VS = 5V, 0V Large Signal Transient Response, VS = ±15V AV = +1 2 µs/DIV 0V0V LT1413 • TA17 20mV/DIV5V/DIV AV = +1 50 µs/DIVAV = +1 NO LOAD INPUT = 0V TO 4V PULSE 10µs/DIVAV = +1 INPUT = 20mV TO 220mV PULSE 20µs/DIV LT1413 • TA18 LT1413 • TA19 LT1413 • TA20 50mV/DIV

The LT1413 is fully specified for single supply operation, i.e., when the negative supply is 0V. Input common-mode range includes ground; the output swings within a few millivolts of ground. If the input is more than a few hundred millivolts below ground, two distinct problems can occur on previous single supply designs, such as the LM124, LM158, OP-21 and OP-221. a) When the input is more than a diode drop below ground, unlimited current will flow from the substrate – terminal) to the input. This can destroy the unit. On the LT1413, the 400Ω resistors, in series with the input (see Schematic Diagram), protect the devices even when the input is 5V below ground. b) When the input is more than 400mV below ground (at 25°C), the input stage saturates (transistors Q3 and Q4) and phase reversal occurs at the output. This can cause lock-up in servo systems. Due to a unique phase reversal protection circuitry (Q21, Q22, Q27, Q28), the LT1413 outputs do not reverse, as illustrated below, even when the inputs are at –1.5V. Keep the output of the other amplifier out of negative saturation for the phase reversal protection to function properly. Since the output of the LT1413 cannot go exactly to ground, but can only approach ground to within a few millivolts, care should be exercised to ensure that the output is not saturated. For example, a 1mV input signal will cause the amplifier to set up in its linear region in the gain 100 configuration shown below, but is not enough to make the amplifier function properly in the voltage-follower mode. LT1413 • 27 R 99R 100mV 1mV OUTPUT SATURATED ≈ 15mV1mV Gain 100 Amplifier Voltage Follower Figure 1. Comparator Applications The single supply operation of the LT1413 lends itself to its use as a precision comparator with TTL compatible output; the response time is shown below. VS = 5V, 0V 50 µs/DIV LT1413 • TA25 –100 VS = 5V, 0V 50 µs/DIV LT1413 • TA24 INPUT (mV) OUTPUT (V) INPUT (mV) OUTPUT (V) APPLICATIONS INFORMATIONU U W U Voltage Follower with Input Exceeding the Negative Common-Mode Range Comparator Rise Response Time 10mV, 5mV, 2mV Overdrives Comparator Fall Response Time to 10mV, 5mV, 2mV Overdrives 100 6VP-P INPUT, –1.5V TO 4.5V LT1413 • TA21 LT1413 • TA22 LM324, LM358, OP-221 EXHIBIT OUTPUT PHASE REVERSAL LT1413 • TA23 LT1413 NO PHASE REVERSAL 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 95035-7487 (408) 432-1900 l FAX: (408) 434-0507 l TELEX: 499-3977 BA/GP 1193 10K REV 0 • PRINTED IN USA  LINEAR TECHNOLOGY CORPORA TION 1993 1/2 LT1413 LT1413 • TA26 600Ω 48k OUTPUT Q15Q14 Q16 600Ω Q36 Q35 16k18Ω2.4k Q25 Q32 Q17 30Ω Q34 Q24100pF Q31 4pF 15µA18µA Q19 Q18 10pF Q10 Q30 Q26 Q33 21pF 2.5pF 80µA11µA11µA1 0 µA3.5µA 3.5 µA 3.9k Q27 IN– IN+ 400Ω 400Ω Q28 Q12 Q11 5k75pF Q29 15µA Q22 Q21 600Ω 800Ω PACKAGE DESCRIPTIONU 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) 0.010 – 0.020 (0.254 – 0.508) 0.016 – 0.050 0.406 – 1.270 × 45° 0°– 8° TYP 0.008 – 0.010 (0.203 – 0.254) SO8 0392 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) BSC N8 0392 0.045 ± 0.015 (1.143 ± 0.381) 0.100 ± 0.010 (2.540 ± 0.254) 0.065 (1.651) TYP 0.045 – 0.065 (1.143 – 1.651) 0.130 ± 0.005 (3.302 ± 0.127) 0.020 (0.508) MIN 0.018 ± 0.003 (0.457 ± 0.076) 0.125 (3.175) MIN 12 3 4 87 6 5 0.250 ± 0.010 (6.350 ± 0.254) 0.400 (10.160) MAX 0.009 – 0.015 (0.229 – 0.381) 0.300 – 0.320 (7.620 – 8.128) 0.325 +0.025 –0.015 +0.635 –0.3818.255() SIMPLIFIED SCHEMATICW W