LT1782 Micropower, Over-The-Top SOT-23, Rail-to-Rail Input and Output Op Amp DESCRIPTION FEATURES n n n n n n n n n n n n n n Operates with Inputs Above V+ Rail-to-Rail Input and Output Micropower: 55A Supply Current Max Operating Temperature Range: -40C to 125C Low Profile (1mm) ThinSOTTM Package Low Input Offset Voltage: 800V Max Single Supply Input Range: 0V to 18V High Output Current: 18mA Min Specified on 3V, 5V and 5V Supplies Output Shutdown on 6-Lead Version Reverse Battery Protection to 18V High Voltage Gain: 1500V/mV Gain Bandwidth Product: 200kHz Slew Rate: 0.07V/s n n n n n n The input range of the LT1782 includes ground, and a unique feature of this device is its Over-The-TopTM operation capability with either or both of its inputs above the positive rail. The inputs handle 18V both differential and common mode, independent of supply voltage. The input stage incorporates phase reversal protection to prevent false outputs from occurring even when the inputs are 9V below the negative supply. The LT1782 can drive loads up to 18mA and still maintain rail-to-rail capability. A shutdown feature on the 6-lead version can disable the part, making the output high impedance and reducing quiescent current to 5A. The LT1782 op amp is available in the 5- and 6-lead SOT-23 packages. For applications requiring higher speed, refer to the LT1783. APPLICATIONS n The LT(R)1782 is a 200kHz op amp available in the small SOT-23 package that operates on all single and split supplies with a total voltage of 2.5V to 18V. The amplifier draws less than 55A of quiescent current and has reverse battery protection, drawing negligible current for reverse supply voltages up to 18V. Portable Instrumentation Battery- or Solar-Powered Systems Sensor Conditioning Supply Current Sensing Battery Monitoring MUX Amplifiers 4mA to 20mA Transmitters L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT and Over-The-Top are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Positive Supply Rail Current Sense Distribution of Input Offset Voltage 25 200 5V 0.2 200 LOAD ILOAD + LT1782 MMBT3904 - VOUT = 2(ILOAD) 0V TO 4.3V 2k 1782 TA01a PERCENTAGE OF AMPLIFIERS V+ 5V TO 18V VS = 5V, 0V VCM = 2.5V 20 15 10 5 0 -900 -600 -300 0 300 600 INPUT OFFSET VOLTAGE (V) 900 1782 TA01b 1782fc 1 LT1782 ABSOLUTE MAXIMUM RATINGS (Note 1) Total Supply Voltage (V+ to V -)................................. 18V Input Differential Voltage.......................................... 18V Input Pin Voltage to V -................................. + 24V/-10V Shutdown Pin Voltage Above V - .............................. 18V Shutdown Pin Current ......................................... 10mA Output Short-Circuit Duration (Note 2) ............ Indefinite Operating Temperature Range (Note 3) LT1782C................................................ -40C to 85C LT1782I................................................. -40C to 85C LT1782H............................................. -40C to 125C Specified Temperature Range (Note 4) LT1782C................................................ -40C to 85C LT1782I................................................. -40C to 85C LT1782H............................................. -40C to 125C Junction Temperature........................................... 150C Storage Temperature Range.................... -65C to 150C Lead Temperature (Soldering, 10 sec)................... 300C PIN CONFIGURATION TOP VIEW 5 V+ OUT 1 V- 2 TOP VIEW V- 2 + - +IN 3 + 6 V OUT 1 +IN 3 4 -IN + - 5 SHDN 4 -IN S5 PACKAGE 5-LEAD PLASTIC TSOT-23 S6 PACKAGE 6-LEAD PLASTIC TSOT-23 TJMAX = 150C, JA = 250C/W TJMAX = 150C, JA = 230C/W ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT1782CS5#PBF LT1782CS5#TRPBF LTLD 5-Lead Plastic TSOT-23 0C to 70C LT1782IS5#PBF LT1782IS5#TRPBF LTLE 5-Lead Plastic TSOT-23 -40C to 85C LT1782HS5#PBF LT1782HS5#TRPBF LTXK 5-Lead Plastic TSOT-23 -40C to 125C LT1782CS6#PBF LT1782CS6#TRPBF LTIS 6-Lead Plastic TSOT-23 0C to 70C LT1782IS6#PBF LT1782IS6#TRPBF LTIT 6-Lead Plastic TSOT-23 -40C to 85C LT1782HS6#PBF LT1782HS6#TRPBF LTXL 6-Lead Plastic TSOT-23 -40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. 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/ 1782fc 2 LT1782 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VS = 3V, 0V; VS = 5V, 0V, VCM = VOUT = half supply, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. LT1782C/LT1782I SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage TA = 25C 0C TA 70C -40C TA 85C VOS /T Input Offset Voltage Drift (Note 7) IOS Input Offset Current IB Input Bias Current VCM = 18V (Note 5) VCM = 18 (Note 5) SHDN or VS = 0V, VCM = 0V to 18V MIN TYP MAX UNITS 400 800 950 1100 V V V l 2 5 V/C l l 0.7 2 1 nA A l l 8 6 0.1 15 12 nA A nA l l l Input Bias Current Drift -40C TA 85C 0.01 nA/C Input Noise Voltage 0.1Hz to 10Hz 1 VP-P en Input Noise Voltage Density f = 1kHz 50 nV/Hz in Input Noise Current Density f = 1kHz 0.05 pA/Hz RIN Input Resistance Differential Common Mode, VCM = 0V to (VCC - 1V) Common Mode, VCM = 0V to 18V 6.5 5 3 M G M CIN l 3.4 l 1.5 l 0 Input Capacitance 5 Input Voltage Range pF 18 V CMRR Common Mode Rejection Ratio (Note 5) VCM = 0V to VCC - 1V VCM = 0V to 18V (Note 8) l l 90 68 100 80 dB dB PSRR Power Supply Rejection Ratio VS = 3V to 12.5V, VCM = VO = 1V l 90 100 dB AVOL Large-Signal Voltage Gain VS = 3V, VO = 500mV to 2.5V, RL = 10k VS = 3V, 0C TA 70C VS = 3V, -40C TA 85C 200 133 100 1500 l l V/mV V/mV V/mV VS = 5V, VO = 500mV to 4.5V, RL = 10k VS = 5V, 0C TA 70C VS = 5V, -40C TA 85C 400 250 200 500 l l V/mV V/mV V/mV VOL Output Voltage Swing LOW No Load ISINK = 5mA VS = 5V, ISINK = 10mA l l l VOH Output Voltage Swing HIGH VS = 3V, No Load VS = 3V, ISOURCE = 5mA l l 2.91 2.6 2.94 2.8 V V VS = 5V, No Load VS = 5V, ISOURCE = 10mA l l 4.91 4.5 4.94 4.74 V V VS = 3V, Short to GND VS = 3V, Short to VCC 5 15 10 30 mA mA VS = 5V, Short to GND VS = 5V, Short to VCC 15 20 30 40 mA mA ISC Short-Circuit Current (Note 2) Minimum Supply Voltage Reverse Supply Voltage IS Supply Current (Note 6) Supply Current, SHDN IS = -100A 3 200 400 l 2.7 l 18 0C TA 70C -40C TA 85C l l VPIN5 = 2V, No Load (Note 10) l 8 500 800 mV mV mV V V 40 55 60 65 A A A 5 15 A 1782fc 3 LT1782 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VS = 3V, 0V; VS = 5V, 0V, VCM = VOUT = half supply, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. LT1782C/LT1782I SYMBOL PARAMETER CONDITIONS ISHDN Shutdown Pin Current VPIN5 = 0.3V, No Load (Note 10) VPIN5 = 2V, No Load (Note 10) VPIN5 = 5V, No Load (Note 10) Shutdown Output Leakage Current MIN TYP MAX UNITS l l l 0.5 2 5 8 nA A A VPIN5 = 2V, No Load (Note 10) l 0.05 1 A Maximum Shutdown Pin Current VPIN5 = 18V, No Load (Note 10) l 10 30 A VL Shutdown Pin Input Low Voltage (Note 10) l 0.3 V VH Shutdown Pin Input High Voltage (Note 10) l 2 V tON Turn-On Time VPIN5 = 5V to 0V, RL = 10k (Note 10) 100 s tOFF Turn-Off Time VPIN5 = 0V to 5V, RL = 10k (Note 10) 6 s GBW Gain Bandwidth Product (Note 5) f = 5kHz 0C TA 70C -40C TA 85C 110 100 90 200 l l kHz kHz kHz Slew Rate (Note 5) AV = -1, RL = 0C TA 70C -40C TA 85C 0.035 0.031 0.028 0.07 l l V/s V/s V/s tS Settling Time VS = 5V, VOUT = 2V to 0.1%, AV = -1 THD Distortion VS = 3V, VO = 2VP-P, AV = 1, RL = 10k, f = 1kHz FPBW Full-Power Bandwidth (Note 9) VOUT = 2VP-P SR 45 s 0.003 % 11 kHz The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VS = 5V, VCM = 0V, VOUT = 0V, for the 6-lead part VPIN5 = V-, pulse power tested unless otherwise specified. LT1782C/LT1782I SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage TA = 25C 0C TA 70C -40C TA 85C MIN TYP MAX UNITS 500 900 1050 1200 V V V l l VOS/T Input Offset Voltage Drift (Note 7) l 2 5 V/C IOS Input Offset Current l 0.7 2 nA IB Input Bias Current l 8 15 Input Bias Current Drift l 0.01 nA nA/C Input Noise Voltage 0.1Hz to 10Hz 1 VP-P en Input Noise Voltage Density f = 1kHz 50 nV/Hz in Input Noise Current Density f = 1kHz 0.05 pA/Hz RIN Input Resistance Differential Common Mode, VCM = -5V to 13V 6.5 3 M M CIN l l 3.4 1.5 l -5 Input Capacitance 5 Input Voltage Range pF 13 V CMRR Common Mode Rejection Ratio VCM = -5V to 13V l 68 80 dB AVOL Large-Signal Voltage Gain VO = 4V, RL = 10k 0C TA 70C -40C TA 85C 55 40 30 150 l l V/mV V/mV V/mV 1782fc 4 LT1782 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. VS = 5V, VCM = 0V, VOUT = 0V, for the 6-lead part VPIN5 = V-, pulse power tested unless otherwise specified. LT1782C/LT1782I SYMBOL PARAMETER CONDITIONS VOL Output Voltage Swing LOW No Load ISINK = 5mA ISINK = 10mA l l l VOH Output Voltage Swing HIGH No Load ISINK = 5mA ISINK = 10mA l l l 4.91 4.6 4.5 4.94 4.8 4.74 ISC Short-Circuit Current (Note 2) Short to GND 0C TA 70C 18 15 30 l mA mA VS = 1.5V to 9V l 90 100 dB 0C TA 70C -40C TA 85C l l Supply Current, SHDN VPIN5 = -3V, VS = 5V, No Load (Note 10) Shutdown Pin Current PSRR Power Supply Rejection Ratio IS Supply Current ISHDN MIN TYP MAX -4.997 -4.8 -4.6 -4.992 -4.5 -4.2 UNITS V V V V V V 45 60 65 70 A A A l 6 20 A VPIN5 = -4.7V, VS = 5V, No Load (Note 10) VPIN5 = -3V, VS = 5V, No Load (Note 10) l l 0.5 2 8 nA A Maximum Shutdown Pin Current VPIN5 = 9V, VS = 9V (Note 10) l 10 30 A 0.05 1 A -4.7 V Shutdown Output Leakage Current VPIN5 = -7V, VS = 9V, No Load (Note 10) l VL Shutdown Pin Input Low Voltage VS = 5V (Note 10) l VH Shutdown Pin Input High Voltage VS = 5V (Note 10) l tON Turn-On Time VPIN5 = 0V to -5V, RL = 10k (Note 10) l 100 s tOFF Turn-Off Time VPIN5 = -5V to 0V, RL = 10k (Note 10) l 6 s GBW Gain Bandwidth Product f = 5kHz 0C TA 70C -40C TA 85C 120 110 100 225 l l kHz kHz kHz AV = -1, RL = , VO = 4V, Measured at VO = 2V 0C TA 70C -40C TA 85C 0.0375 0.033 0.030 0.075 l l V/s V/s V/s SR Slew Rate -3 V tS Settling Time VOUT = 4V to 0.1%, AV = 1 50 s FPBW Full-Power Bandwidth (Note 9) VOUT = 8VP-P 3 kHz The l denotes the specifications which apply over the full operating temperature range of -40C TA 125C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. (Note 4) LT1782H SYMBOL PARAMETER VOS Input Offset Voltage CONDITIONS MIN TYP MAX UNITS 400 l 800 3 V mV VOS/T Input Offset Voltage Drift l 15 V/C IOS Input Offset Current VCM = 18V (Note 5) l l 3 2 nA A IB Input Bias Current VCM = 18V (Note 5) l l 30 25 nA A 18 V Input Voltage Range CMRR Common Mode Rejection Ratio VCM = 0.3V to VCC - 1V VCM = 0.3V to 18V l 0.3 l l 76 60 dB dB 1782fc 5 LT1782 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range of -40C TA 125C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply, for the 6-lead part VPIN5 = 0V, pulse power tested unless otherwise specified. (Note 4) LT1782H SYMBOL PARAMETER CONDITIONS MIN TYP AVOL Large-Signal Voltage Gain VS = 3V, VO = 500mV to 2.5V, RL = 10k 1500 l 200 50 V/mV V/mV 400 80 1500 l V/mV V/mV VS = 5V, VO = 500mV to 4.5V, RL = 10k MAX VOL Output Voltage Swing LOW No Load ISINK = 5mA VS = 5V, ISINK = 10mA l l l VOH Output Voltage Swing HIGH VS = 3V, No Load VS = 3V, ISOURCE = 5mA l l 2.85 2.20 V V VS = 5V, No Load VS = 5V, ISOURCE = 10mA l l 4.85 3.80 V V VS = 3V to 12.5V, VCM = VO = 1V l 80 dB l 2.7 V l 18 PSRR Power Supply Rejection Ratio Minimum Supply Voltage Reverse Supply Voltage IS ISHDN IS = -100A 15 900 1500 UNITS Supply Current mV mV mV V 40 l 55 100 Supply Current, SHDN VPIN5 = 2V, No Load (Note 10) l 25 A Shutdown Pin Current VPIN5 = 0.3V, No Load (Note 10) VPIN5 = 2V, No Load (Note 10) l l 12 nA A Output Leakage Current VPIN5 = 2V, No Load (Note 10) l 3 A 0.5 A A Maximum Shutdown Pin Current VPIN5 = 18V, No Load l 45 A VL Shutdown Pin Input Low Voltage (Note 10) l 0.3 V VH Shutdown Pin Input High Voltage (Note 10) l 2 GBW Gain Bandwidth Product f = 10kHz (Note 5) 110 65 200 l kHz kHz 0.035 0.020 0.07 l V/s V/s SR Slew Rate AV = -1, RL = (Note 7) V The l denotes the specifications which apply over the full operating temperature range of -40C TA 125C. VS = 5V, VCM = 0V, VOUT = 0V, for the 6-lead part VPIN5 = V-, pulse power tested unless otherwise specified. (Note 4) LT1782H SYMBOL PARAMETER VOS Input Offset Voltage CONDITIONS MIN TYP MAX UNITS 500 l 900 3.2 V mV VOS /T Input Offset Voltage Drift (Note 9) l 15 V/C IOS Input Offset Current l 3 nA IB Input Bias Current l 30 nA CMRR Common Mode Rejection Ratio VCM = -4.7V to 13V AVOL Large-Signal Voltage Gain VS = 4V, RL = 10k VO Output Voltage Swing No Load ISINK = 5mA ISINK = 10mA l 60 l 55 20 l l l 4.85 4.10 3.50 dB 150 V/mV V/mV V V V 1782fc 6 LT1782 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range of -40C TA 125C. VS = 5V, VCM = 0V, VOUT = 0V, for the 6-lead part VPIN5 = V-, pulse power tested unless otherwise specified. (Note 4) LT1782H SYMBOL PARAMETER CONDITIONS PSRR Power Supply Rejection Ratio VS = 1.5V to 9V MIN Minimum Supply Voltage IS TYP MAX UNITS l 80 dB l 1.35 V Supply Current 45 l 60 110 A A Supply Current, SHDN VPIN5 = -3V, VS = 5V, No Load (Note 10) l Shutdown Pin Current VPIN5 = -4.7V, VS = 5V, No Load (Note 10) VPIN5 = -3V, VS = 5V, No Load (Note 10) l l Maximum Shutdown Pin Current VPIN5 = 9V, VS = 9V, No Load (Note 10) l Output Leakage Current VPIN5 = -7V, VS = 9V, No Load l VL Shutdown Pin Input Low Voltage VS = 5V l VH Shutdown Pin Input High Voltage VS = 5V l -3 GBW Gain Bandwidth Product f = 5kHz 120 70 225 l kHz kHz 0.0375 0.0220 0.075 l V/s V/s ISHDN SR Slew Rate AV = -1, RL = , VO = 4V Measured at VO = 2V 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: A heat sink may be required to keep the junction temperature below absolute maximum. Note 3: The LT1782C and LT1782I are guaranteed functional over the operating temperature range of -40C to 85C. The LT1782H is guaranteed functional over the operating temperature range of -40C to 125C. Note 4: The LT1782C is guaranteed to meet specified performance from 0C to 70C. The LT1782C is designed, characterized and expected to meet specified performance from -40C to 85C but is not tested or QA sampled at these temperatures. The LT1782I is guaranteed to meet specified performance from - 40C to 85C. The LT1782H is guaranteed to meet specified performance from -40C to 125C. 0.5 25 A 12 nA A 45 A 3 A -4.7 V V Note 5: VS = 5V limits are guaranteed by correlation to VS = 3V and VS = 5V or VS = 9V tests. Note 6: VS = 3V limits are guaranteed by correlation to VS = 5V and VS = 5V or VS = 9V tests. Note 7: Guaranteed by correlation to slew rate at VS = 5V, and GBW at VS = 3V and VS = 5V tests. Note 8: This specification implies a typical input offset voltage of 1.8mV at VCM = 18V and a maximum input offset voltage of 7.2mV at VCM = 18V. Note 9: This parameter is not 100% tested. Note 10: Specifications apply to 6-lead SOT-23 with shutdown. Note 11: Full-power bandwidth is calculated for the slew rate. FPBW = SR/2VP. 1782fc 7 LT1782 TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs Supply Voltage 400 50 TA = -55C 30 25 2 4 6 8 10 12 14 SUPPLY VOLTAGE (V) 16 18 4 200 100 0 TA = -55C TA = 125C -100 -300 -400 1 2 3 4 TOTAL SUPPLY VOLTAGE (V) 0 OUTPUT SATURATION VOLTAGE (V) INPUT BIAS CURRENT (nA) 1 TA = 125C 3000 2000 TA = 25C 1000 40 30 TA = -55C 20 10 0 1 TA = 125C 0.1 TA = 25C TA = -55C 10 100 1m SOURCING LOAD CURRENT (A) 10m Output Saturation Voltage vs Input Overdrive 40 100 OUTPUT HIGH 0 10 20 30 40 50 INPUT OVERDRIVE (mV) 0.01 0.001 OUTPUT CURRENT (mA) 60 1782 G07 10 1 1m SINKING LOAD CURRENT (A) 1 1782 G06 VS = 2.5V SINKING CURRENT 30 SOURCING CURRENT 25 15 -50 -25 10m 0.1Hz to 10Hz Noise Voltage 20 VS = 2.5V NO LOAD TA = -55C TA = 25C VS = 5V 35 OUTPUT LOW TA = 125C 0.1 Output Short-Circuit Current vs Temperature 10 VS = 2.5V VOD = 30mV 1782 G05 1782 G04 OUTPUT SATURATION VOLTAGE (mV) Output Saturation Voltage vs Load Current (Output Low) VS = 2.5V VOD = 30mV 0.01 1 -10 15 16 18 3.8 4 4.2 4.4 4.6 4.8 5 5.2 5.4 COMMON MODE VOLTAGE (V) 1 1782 G03 Output Saturation Voltage vs Load Current (Output High) VS = 5V, 0V 4000 0 -10-8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 VIN (V) 5 1782 G02 Input Bias Current vs Common Mode Voltage 5000 + - 1 1782 G01 6000 5V 2 VIN TA = 25C -200 3 NOISE VOLTAGE (400nV/DIV) 35 VS = 5V, 0V 300 VOUT (V) TA = 25C 5 OUTPUT SATURATION VOLTAGE (V) SUPPLY CURRENT (A) 40 INPUT OFFSET VOLTAGE CHANGE (V) TA = 125C 45 20 Output Voltage vs Large Input Voltage Minimum Supply Voltage 0 25 50 75 TEMPERATURE (C) 100 125 1782 G08 0 1 2 3 4 5 6 TIME (sec) 7 8 9 10 1782 G09 1782fc 8 LT1782 TYPICAL PERFORMANCE CHARACTERISTICS Noise Voltage Density vs Frequency 70 60 50 40 30 100 1k FREQUENCY (Hz) 0.35 50 0.30 0.20 0.15 0.10 0.05 0 1 10 100 1k FREQUENCY (Hz) 200 190 180 100 0.08 FALLING 0.07 0.06 -25 0 25 50 75 TEMPERATURE (C) 100 VS = 2.5V AV = -1 RF = RG = 10k f = 5kHz GAIN BANDWIDTH PRODUCT 100 50 1k 10k LOAD RESISTANCE () 100k 1782 G16 POWER SUPPLY REJECTION RATIO (dB) GAIN BANDWIDTH PRODUCT (kHz) 50 PHASE MARGIN (DEG) 60 PHASE MARGIN 125 50 220 GAIN BANDWIDTH PRODUCT 200 AV = -1 RF = RG = 10k f = 5kHz 180 160 2 0 4 6 8 10 12 14 16 TOTAL SUPPLY VOLTAGE (V) CMRR vs Frequency 110 VS = 2.5V 80 70 60 50 POSITIVE SUPPLY 40 30 20 10 NEGATIVE SUPPLY 0 -10 1k 10k 100k FREQUENCY (Hz) 18 1782 G15 PSRR vs Frequency 90 55 240 1782 G14 70 150 1782 G12 PHASE MARGIN 0.09 0.04 -50 125 -100 1M 10k 100k FREQUENCY (Hz) 1k RISING Gain Bandwidth Product and Phase Margin vs Load Resistance 200 -80 60 1782 G13 250 -60 -20 COMMON MODE REJECTION RATIO (dB) 0 25 50 75 TEMPERATURE (C) -40 -10 Gain Bandwidth Product and Phase Margin vs Supply Voltage 0.05 -25 -20 0 VS = 2.5V 0.10 SLEW RATE (V/s) GAIN BANDWIDTH (kHz) 0.11 0 10 Slew Rate vs Temperature 210 170 -50 20 GAIN 20 1782 G11 f = 5kHz VS = 2.5V 220 40 PHASE MARGIN (DEG) 230 60 PHASE 30 -30 10k 1782 G10 Gain Bandwidth Product vs Temperature 80 40 0.25 10k 100 VS = 2.5V 60 GAIN BAINDWIDTH PRODUCT (kHz) 10 1 70 VS = 2.5V GAIN (dB) INPUT NOISE CURRENT DENSITY (pA/Hz) 0.40 PHASE SHIFT (DEG) INPUT NOISE VOLTAGE DENSITY (nV/Hz) 80 20 Gain and Phase Shift vs Frequency Input Noise Current vs Frequency 1M 1782 G17 VS = 2.5V 100 90 80 70 60 50 40 30 1k 10k FREQUENCY (Hz) 100k 1782 G18 1782fc 9 LT1782 TYPICAL PERFORMANCE CHARACTERISTICS Disabled Output Impedance vs Frequency (Note 8) Output Impedance vs Frequency 1M VS = 2.5V AV = 100 100 AV = 10 10 AV = 1 1 4 VS = 2.5V VPIN5 (SHUTDOWN) = 2.5V 3 100k AV = 1 10k 1 VS = 5V 0 -1 -2 1k AV = 1 -3 100 1k 10k 100k FREQUENCY (Hz) 100 100 1M 1k 10k 100k FREQUENCY (Hz) Capacitive Load Handling Overshoot vs Capacitive Load Undistorted Output Swing vs Frequency 12 VS = 5V, 0V VCM = 2.5V OUTPUT SWING (VP-P) OVERSHOOT (%) 25 20 AV = 1 15 AV = 5 10 AV = 10 5 0 10 VS = 5V 10 30 6 4 VS = 1.5V 10000 1k 10k FREQUENCY (Hz) THD + NOISE (%) THD + NOISE (%) 0.001 100 VS = 3V, 0V VIN = 0.5V TO 2.5V 100k f = 1kHz, RL = 10k AV = 1 VS = 1.5V VCM = 0V 1 1 0.01 0.1 AV = -1 RF = RG = 100k 0.010 AV = -1, RF = RG = 100k VS = 1.5V VCM = 0V 0.1 0.01 VS = 3V, 0V VIN = 0.2V TO 2.2V 0.001 1k 10k LOAD RESISTANCE TO GROUND () 100k 1782 G25 0.001 10 1k 100 FREQUENCY (Hz) 10k 1782 G24 Total Harmonic Distortion + Noise vs Output Voltage Amplitude VS = 3V TOTAL AV = 1 VIN = 2VP-P AT 1kHz 80 VS = 3V, 0V VOUT = 2VP-P VCM = 1.2V RL = 10k 1782 G23 10 VS = 1.5V VIN = 1V 70 AV = 1 0 100 Total Harmonic Distortion + Noise vs Load Resistance 0.1 1 DISTORTION 1% AV = 1 8 1782 G22 10 35 40 50 60 SETTLING TIME (s) Total Harmonic Distortion + Noise vs Frequency 2 100 1000 CAPACITIVE LOAD (pF) 30 1782 G21 THD + NOISE (%) 35 25 AV = -1 1782 G20 1782 G19 40 -4 1M AV = 1 VS = 3V. 0V VCM = 1.5V 0 AV = -1, RF = RG = 100k VS = 3V, 0V VCM = 1.5V 1 2 OUTPUT VOLTAGE AMPLITUDE (VP-P) Open-Loop Gain INPUT OFFSET VOLTAGE CHANGE (50V/DIV) 0.1 AV = -1 2 OUTPUT STEP (V) 1k OUTPUT IMPEDANCE () OUTPUT IMPEDANCE () 10k Settling Time to 0.1% vs Output Step 3 1782 G26 VS = 5V RL = 10k RL = 50k RL = 2k -6 -5 -4 -3 -2 -1 0 1 2 3 OUTPUT VOLTAGE (V) 4 5 6 1782 G27 1782fc 10 LT1782 TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs Shutdown Voltage 50 Large-Signal Response Small-Signal Response VS = 5V, 0V TA = 125C SUPPLY CURRENT (A) 40 TA = 25C 30 TA = -55C 20 10 0 0 0.5 1 1.5 2 SHUTDOWN PIN VOLTAGE (V) 2.5 1782 G29 VS = 5V AV = 1 CL = 15pF VS = 5V AV = 1 CL = 15pF 1782 G30 1782 G28 APPLICATIONS INFORMATION Supply Voltage The positive supply pin of the LT1782 should be bypassed with a small capacitor (typically 0.1F) within an inch of the pin. When driving heavy loads, an additional 4.7F electrolytic capacitor should be used. When using split supplies, the same is true for the negative supply pin. The LT1782 is protected against reverse battery voltages up to 18V. In the event a reverse battery condition occurs, the supply current is typically less than 1nA. Inputs The LT1782 has two input stages, NPN and PNP (see the Simplified Schematic), resulting in three distinct operating regions as shown in the Input Bias Current vs Common Mode typical performance curve. For input voltages about 0.8V or more below V+, the PNP input stage is active and the input bias current is typically -8nA. When the input common mode voltage is within 0.5V of the positive rail, the NPN stage is operating and the input bias current is typically 15nA. Increases in temperature will cause the voltage at which operation switches from the PNP input stage to the NPN input stage to move towards V+. The input offset voltage of the NPN stage is untrimmed and is typically 1.8mV. A Schottky diode in the collector of the input NPN transistors, along with special geometries for these NPN transistors, allows the LT1782 to operate with either or both of its inputs above V+. At about 0.3V above V+, the NPN input transistor is fully saturated and the input bias current is typically 4A at room temperature. The input offset voltage is typically 1.8mV when operating above V+. The LT1782 will operate with its inputs 18V above V- regardless of V+. The inputs are protected against excursions as much as 10V below V- by an internal 6k resistor in series with each input and a diode from the input to the negative supply. The input stage of the LT1782 incorporates phase reversal protection to prevent the output from phase reversing for inputs up to 9V below V-. There are no clamping diodes between the inputs and the maximum differential input voltage is 18V. Output The output of the LT1782 can swing to within 60mV of the positive rail with no load and within 3mV of the negative rail with no load. When monitoring voltages within 60mV of the positive rail or within 3mV of the negative rail, gain should be taken to keep the output from clipping. The LT1782 can sink and source over 30mA at 5V supplies, 1782fc 11 LT1782 APPLICATIONS INFORMATION the input voltage swing between ground and (V+ - 0.8V). See the Typical Performance Characteristics curves, "Total Harmonic Distortion + Noise vs Ouput Voltage Amplitude." sourcing current is reduced to 10mA at 3V total supplies as noted in the Electrical Characteristics section. The LT1782 is internally compensated to drive at least 600pF of capacitance under any output loading conditions. A 0.22F capacitor in series with a 150 resistor between the output and ground will compensate these amplifiers for larger capacitive loads, up to 10,000pF, at all output currents. Gain The open-loop gain is almost independent of load when the output is sourcing current. This optimizes performance in single supply applications where the load is returned to ground. The typical performance curve of open-loop gain for various loads shows the details. Distortion There are two main contributors to distortion in op amps: output crossover distortion as the output transitions from sourcing to sinking current, and distortion caused by nonlinear common mode rejection. If the op amp is operating inverting, there is no common mode induced distortion. If the op amp is operating in the PNP input stage (input is not within 0.8V of V+), the CMRR is very good, typically 100dB. When the LT1782 switches between input stages, there is significant nonlinearity in the CMRR. Lower load resistance increases the output crossover distortion but has no effect on the input stage transition distortion. For lowest distortion, the LT1782 should be operated single supply, with the output always sourcing current and with Shutdown The 6-lead part includes a shutdown feature that disables the part, reducing quiescent current and making the output high impedance. The part can be shut down by bringing the SHDN pin 1.2V or more above V-. When shut down, the supply current is about 5A and the output leakage current is less than 1A (V- VOUT V+). In normal operation, the SHDN pin can be tied to V- or left floating. See the Typical Performance Characteristics curves, "Supply Current vs Shutdown Pin Voltage." SIMPLIFIED SCHEMATIC V+ Q2 Q1 Q3 D1 SHDN R1 30k Q4 R2 6k -IN Q19 Q17 + J1 Q7 R3 6k 2A +IN Q9 Q24 Q5 Q6 Q8 Q11 D4 D5 Q10 Q20 OUT Q12 Q15 Q26 Q25 Q23 Q22 D3 Q13 Q14 R4 40k Q16 Q18 Q21 R5 40k V- 1782 SS 1782fc 12 LT1782 TYPICAL APPLICATIONS Protected Fault Conditions OK! -18V OK! 5V V+ LT1782 LT1782 + 24V REVERSE BATTERY OK! 5V + OK! 5V LT1782 LT1782 10V INPUT DIFFERENTIAL VOLTAGE + 18V INPUT OVERVOLTAGE INPUT BELOW GROUND 1782 TA02 Compact, High Output Current, Low Dropout, Precision 2.5V Supply VS 2.8V to 3.3V SUPPLY CURRENT 120A, NO LOAD 22 5% 680 5% 1k 5% + LT1782 - 100k 5% VISHAY SILICONIX Si3445DV 0.1F LT1790-2.5 1F 1782 TA03 VOUT 2.5V ILOAD = 0mA TO 300mA NOTE: NOT CURRENT LIMITED 1782fc 13 LT1782 PACKAGE DESCRIPTION S5 Package 5-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1635) 0.62 MAX 0.95 REF 2.90 BSC (NOTE 4) 1.22 REF 2.80 BSC 1.4 MIN 3.85 MAX 2.62 REF 1.50 - 1.75 (NOTE 4) PIN ONE RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.30 - 0.45 TYP 5 PLCS (NOTE 3) 0.95 BSC 0.80 - 0.90 0.09 - 0.20 (NOTE 3) 0.20 BSC 0.01 - 0.10 1.00 MAX DATUM `A' 0.30 - 0.50 REF NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 1.90 BSC 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 S5 TSOT-23 0302 REV B S6 Package 6-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1636) 0.62 MAX 2.90 BSC (NOTE 4) 0.95 REF 1.22 REF 3.85 MAX 2.62 REF 1.4 MIN 2.80 BSC 1.50 - 1.75 (NOTE 4) PIN ONE ID RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.30 - 0.45 6 PLCS (NOTE 3) 0.95 BSC 0.80 - 0.90 0.09 - 0.20 (NOTE 3) 0.20 BSC 0.30 - 0.50 REF NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 14 0.01 - 0.10 1.00 MAX DATUM `A' 1.90 BSC 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 S6 TSOT-23 0302 REV B 1782fc LT1782 REVISION HISTORY (Revision history begins at Rev C) REV DATE DESCRIPTION PAGE NUMBER C 10/10 Revised supply current in shutdown mode from 5mA to 5A in Shutdown section of Applications Information 12 1782fc 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. 15 LT1782 TYPICAL APPLICATIONS Current Source VCC LT1634-1.25 R1 + LT1782 2N3906 - IOUT = 1.25V R1 1782 TA04 Programmable Gain, AV = 2, AV = 20, 100kHz Amplifier Programmable Gain Amplifier Frequency Response 30 VCC 25 AV = 2 SHDN 15 VCC + IN SHDN OUT LT1784 VCC - + 10 5 AV = 2 0 -5 VEE -10 LT1782 -15 - AV = 1+ VEE R2 9.09k AV = 20 20 GAIN (dB) AV = 20 R1 10k OR 1+ ( ( R1 + R2 R3 R1 R2 + R3 ) ) -20 1k 10k 100k 1M FREQUENCY (Hz) 10M 1782 TA06 1782 TA05 R3 1k RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1783 Micropower Over-The-Top SOT-23 Rail-to-Rail Input and Output Op Amp SOT-23 Package, Micropower 210A per Amplifier, Rail-to-Rail Input and Output, 1.25MHz GBW LT1490/LT1491 Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps Single Supply Input Range: -0.4V to 44V, Micropower 50A per Amplifier, Rail-to-Rail Input and Output , 200kHz GBW LT1636 Single Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp 55A Supply Current, VCM Extends 44V Above VEE, Independent of VCC, MSOP Package, Shutdown Function LT1638/LT1639 Dual/Quad, 1.2MHz, 0.4V/s, Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps 170mA Supply Current, Single Supply Input Range: -0.4V to 44V, Rail-to-Rail Input and Output 1782fc 16 Linear Technology Corporation LT 1010 REV C * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com LINEAR TECHNOLOGY CORPORATION 1999