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 of Linear Technology Corporation. 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 1782fb 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 TOP VIEW 5 V+ OUT 1 V- 2 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/ 1782fb 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 VCM = 18V (Note 5) IB Input Bias Current 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 1782fb 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 Maximum Shutdown Pin Current MIN TYP MAX l l l 0.5 2 5 8 nA A A VPIN5 = 2V, No Load (Note 10) l 0.05 1 A VPIN5 = 18V, No Load (Note 10) l 10 30 A VL Shutdown Pin Input Low Voltage (Note 10) l VH Shutdown Pin Input High Voltage (Note 10) l UNITS 0.3 V 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 l l 110 100 90 200 kHz kHz kHz SR Slew Rate (Note 5) AV = -1, RL = 0C TA 70C -40C TA 85C l l 0.035 0.031 0.028 0.07 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 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 VOS/T Input Offset Voltage Drift (Note 7) IOS IB MIN TYP MAX UNITS 500 900 1050 1200 V V V l 2 5 V/C Input Offset Current l 0.7 2 nA Input Bias Current l 8 15 Input Bias Current Drift l 0.01 l l 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 Input Capacitance l l 3.4 1.5 l -5 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 1782fb 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 PSRR Power Supply Rejection Ratio VS = 1.5V to 9V l 90 100 dB IS Supply Current 0C TA 70C -40C TA 85C l l Supply Current, SHDN VPIN5 = -3V, VS = 5V, No Load (Note 10) Shutdown Pin Current ISHDN Maximum Shutdown Pin Current 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 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 l l 120 110 100 225 kHz kHz kHz SR Slew Rate AV = -1, RL = , VO = 4V, Measured at VO = 2V 0C TA 70C -40C TA 85C l l 0.0375 0.033 0.030 0.075 V/s V/s V/s tS Settling Time VOUT = 4V to 0.1%, AV = 1 50 s FPBW Full-Power Bandwidth (Note 9) VOUT = 8VP-P 3 kHz -3 V 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 VOS/T Input Offset Voltage Drift IOS Input Offset Current IB CONDITIONS TYP MAX UNITS 400 800 3 V mV l 15 V/C VCM = 18V (Note 5) l l 3 2 nA A VCM = 18V (Note 5) l l 30 25 nA A 18 V l Input Bias Current Input Voltage Range CMRR Common Mode Rejection Ratio MIN VCM = 0.3V to VCC - 1V VCM = 0.3V to 18V l 0.3 l l 76 60 dB dB 1782fb 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 l 200 50 1500 V/mV V/mV l 400 80 1500 V/mV V/mV VS = 5V, VO = 500mV to 4.5V, RL = 10k MAX UNITS 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 Supply Current 15 900 1500 VPIN5 = 2V, No Load (Note 10) l Shutdown Pin Current VPIN5 = 0.3V, No Load (Note 10) VPIN5 = 2V, No Load (Note 10) l l Output Leakage Current VPIN5 = 2V, No Load (Note 10) l V 40 l Supply Current, SHDN mV mV mV 55 100 A A 25 A 12 nA A 3 A 0.5 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) l 110 65 200 kHz kHz SR Slew Rate AV = -1, RL = (Note 7) l 0.035 0.020 0.07 V/s V/s 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 VOS /T Input Offset Voltage Drift (Note 9) IOS Input Offset Current IB Input Bias Current CONDITIONS MIN TYP MAX UNITS 500 900 3.2 V mV l 15 V/C l 3 nA l 30 nA l 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 1782fb 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 TYP MAX UNITS l 80 dB l 1.35 V IS Supply Current Supply Current, SHDN VPIN5 = -3V, VS = 5V, No Load (Note 10) l ISHDN 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) Output Leakage Current 45 60 110 A A 25 A 12 nA A l 45 A VPIN5 = -7V, VS = 9V, No Load l 3 A l 0.5 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 l 120 70 225 kHz kHz SR Slew Rate AV = -1, RL = , VO = 4V Measured at VO = 2V l 0.0375 0.0220 0.075 V/s V/s 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. -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. 1782fb 7 LT1782 TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs Supply Voltage 400 TA = 125C 45 40 TA = 25C 35 TA = -55C 30 25 5 4 200 100 0 TA = -55C TA = 125C -100 TA = 25C -200 4 6 8 10 12 14 SUPPLY VOLTAGE (V) 16 18 1 2 3 4 TOTAL SUPPLY VOLTAGE (V) 0 OUTPUT SATURATION VOLTAGE (V) INPUT BIAS CURRENT (nA) 1 VS = 5V, 0V 4000 3000 2000 TA = 25C 1000 40 30 0 -10-8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 VIN (V) 5 1782 G03 Output Saturation Voltage vs Load Current (Output High) TA = 125C TA = -55C 20 10 - 1782 G02 Input Bias Current vs Common Mode Voltage 5000 + -300 1782 G01 6000 5V 2 1 Output Saturation Voltage vs Load Current (Output Low) 1 VS = 2.5V VOD = 30mV OUTPUT SATURATION VOLTAGE (V) 2 3 VIN -400 20 VS = 5V, 0V 300 VOUT (V) INPUT OFFSET VOLTAGE CHANGE (V) 50 SUPPLY CURRENT (A) Output Voltage vs Large Input Voltage Minimum Supply Voltage TA = 125C 0.1 TA = 25C TA = -55C VS = 2.5V VOD = 30mV TA = 125C 0.1 TA = -55C TA = 25C 0.01 0 -10 0.01 1 15 16 18 3.8 4 4.2 4.4 4.6 4.8 5 5.2 5.4 COMMON MODE VOLTAGE (V) 0.001 10 100 1m SOURCING LOAD CURRENT (A) 10 1 1m SINKING LOAD CURRENT (A) 1 1782 G05 1782 G04 Output Saturation Voltage vs Input Overdrive 40 10m 1782 G06 Output Short-Circuit Current vs Temperature 100 0.1Hz to 10Hz Noise Voltage VS = 5V VS = 2.5V OUTPUT HIGH 10 OUTPUT LOW NOISE VOLTAGE (400nV/DIV) 35 OUTPUT CURRENT (mA) OUTPUT SATURATION VOLTAGE (mV) 10m SINKING CURRENT 30 SOURCING CURRENT 25 20 VS = 2.5V NO LOAD 1 0 10 20 30 40 50 INPUT OVERDRIVE (mV) 60 1782 G07 15 -50 -25 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 1782fb 8 LT1782 TYPICAL PERFORMANCE CHARACTERISTICS Noise Voltage Density vs Frequency 70 60 50 40 30 10 1 100 1k FREQUENCY (Hz) 50 0.30 0.20 0.15 0.10 0.05 0 10 -20 0 -40 -10 -60 -20 -80 -30 1 10 100 1k FREQUENCY (Hz) 1782 G12 Gain Bandwidth Product and Phase Margin vs Supply Voltage 60 VS = 2.5V 200 190 0.09 0.08 FALLING 0.07 0.06 0.05 100 0.04 -50 125 -25 0 25 50 75 TEMPERATURE (C) 100 1782 G13 GAIN BANDWIDTH PRODUCT 150 100 90 POWER SUPPLY REJECTION RATIO (dB) VS = 2.5V AV = -1 RF = RG = 10k f = 5kHz PHASE MARGIN (DEG) 60 50 200 10k LOAD RESISTANCE () 100k 1782 G16 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 1k 10k 100k FREQUENCY (Hz) 18 1782 G15 -10 50 1k 220 PSRR vs Frequency 70 250 50 1782 G14 Gain Bandwidth Product and Phase Margin vs Load Resistance PHASE MARGIN 125 240 COMMON MODE REJECTION RATIO (dB) 0 25 50 75 TEMPERATURE (C) 55 PHASE MARGIN GAIN BAINDWIDTH PRODUCT (kHz) 210 -25 -100 1M 10k 100k FREQUENCY (Hz) 1k 10k RISING 170 -50 0 0.10 SLEW RATE (V/s) GAIN BANDWIDTH (kHz) 0.11 180 GAIN BANDWIDTH PRODUCT (kHz) 20 GAIN 20 PHASE MARGIN (DEG) 220 40 30 Slew Rate vs Temperature f = 5kHz VS = 2.5V 60 PHASE 1782 G11 Gain Bandwidth Product vs Temperature 80 40 0.25 10k 100 VS = 2.5V 60 0.35 1782 G10 230 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 1782fb 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 4 VS = 2.5V VPIN5 (SHUTDOWN) = 2.5V 3 AV = 1 AV = -1 2 100k OUTPUT STEP (V) 1k OUTPUT IMPEDANCE () OUTPUT IMPEDANCE () 10k Settling Time to 0.1% vs Output Step 10k 1 VS = 5V 0 -1 -2 1k 1 AV = 1 AV = -1 -3 100 100 0.1 100 1k 10k 100k FREQUENCY (Hz) 1M -4 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) 25 20 AV = 1 15 AV = 5 10 AV = 10 5 1 DISTORTION 1% AV = 1 8 6 4 80 VS = 1.5V VS = 3V, 0V VOUT = 2VP-P VCM = 1.2V RL = 10k 0.1 AV = -1 RF = RG = 100k 0.010 AV = 1 10 100 1000 CAPACITIVE LOAD (pF) 0.001 0 100 10000 1k 10k FREQUENCY (Hz) 1782 G22 VS = 3V TOTAL AV = 1 VIN = 2VP-P AT 1kHz THD + NOISE (%) VS = 3V, 0V VIN = 0.5V TO 2.5V 0.01 0.001 100 f = 1kHz, RL = 10k AV = 1 VS = 1.5V VCM = 0V 1 1 0.1 AV = -1, RF = RG = 100k VS = 1.5V VCM = 0V 0.1 0.01 VS = 3V, 0V VIN = 0.2V TO 2.2V AV = 1 VS = 3V. 0V VCM = 1.5V 0.001 1k 10k LOAD RESISTANCE TO GROUND () 100k 1782 G25 10 1k 100 FREQUENCY (Hz) 10k 1782 G24 Total Harmonic Distortion + Noise vs Output Voltage Amplitude 10 VS = 1.5V VIN = 1V 100k 1782 G23 Total Harmonic Distortion + Noise vs Load Resistance THD + NOISE (%) 70 2 0 10 35 40 50 60 SETTLING TIME (s) Total Harmonic Distortion + Noise vs Frequency 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) OVERSHOOT (%) VS = 5V 10 30 30 1782 G21 THD + NOISE (%) 35 25 1782 G20 1782 G19 40 1M 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 1782fb 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 1782 G29 VS = 5V AV = 1 CL = 15pF 0 0 0.5 1 1.5 2 SHUTDOWN PIN VOLTAGE (V) 2.5 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, 1782fb 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 5mA 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 R2 6k Q4 Q19 -IN Q17 + J1 Q7 R3 6k 2A Q8 Q11 OUT Q16 Q9 Q5 Q18 Q15 Q26 Q24 Q20 Q12 +IN Q25 Q23 Q22 D3 Q6 D4 D5 Q10 Q13 Q14 R4 40k Q21 R5 40k V- 1782 SS 1782fb 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% 1k 5% + 680 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 1782fb 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 1.4 MIN 3.85 MAX 2.62 REF 2.80 BSC 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 0.20 BSC 0.01 - 0.10 1.00 MAX DATUM `A' 0.30 - 0.50 REF 0.09 - 0.20 (NOTE 3) NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 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 1.90 BSC S5 TSOT-23 0302 REV B 1782fb 14 LT1782 PACKAGE DESCRIPTION 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 0.20 BSC 0.01 - 0.10 1.00 MAX DATUM `A' 0.30 - 0.50 REF 0.09 - 0.20 (NOTE 3) 1.90 BSC NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 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 1782fb 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 OUT LT1784 SHDN 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 1782fb 16 Linear Technology Corporation LT 0809 REV B * PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear.com (c) LINEAR TECHNOLOGY CORPORATION 1999