LT1783 1.25MHz, Over-The-Top Micropower, Rail-to-Rail Input and Output Op Amp in SOT-23 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: 300μA Supply Current Max Operating Temperature Range: –40°C to 125°C Gain Bandwidth Product: 1.25MHz Slew Rate: 0.42V/μs Low Input Offset Voltage: 800μV 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 Low Profile (1mm) ThinSOT™ Package APPLICATIONS n n n n n n n Portable Instrumentation Battery- or Solar-Powered Systems Sensor Conditioning Supply Current Sensing Battery Monitoring MUX Amplifiers 4mA to 20mA Transmitters The LT®1783 is a 1.25MHz 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 300μA of quiescent current and has reverse-battery protection, drawing negligible current for reverse supply voltages up to 18V. The input range of the LT1783 includes ground, and a unique feature of this device is its Over-The-Top® operation capabilitity 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 LT1783 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 5μA. The LT1783 op amp is available in the 5- and 6-lead SOT-23 packages. For applications requiring lower power, refer to the LT1782. L, LT, LTC, LTM, Linear Technology, the Linear logo and Over-The-Top are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark 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 200Ω 5V 0.2Ω 200Ω LOAD ILOAD + LT1783 2N3904 – VOUT = 2Ω(ILOAD) 0V TO 4.3V 2k 1783 TA01 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 (μV) 900 1783 TA01b 1783fd 1 LT1783 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) LT1783C ............................................. –40°C to 85°C LT1783I .............................................. –40°C to 85°C LT1783H ........................................... –40°C to 125°C Specified Temperature Range (Note 4) LT1783C ............................................. –40°C to 85°C LT1783I .............................................. –40°C to 85°C LT1783H ........................................... –40°C to 125°C Junction Temperature ......................................... 150°C Storage Temperature Range.................. –65°C to 150°C Lead Temperature (Soldering, 10 sec) ................. 300°C 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 = 150°C, θJA = 250°C/W TJMAX = 150°C, θJA = 230°C/W ORDER INFORMATION TAPE AND REEL (MINI) TAPE AND REEL PART MARKING PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT1783CS5#TRMPBF LT1783CS5#TRPBF LTLF 5-Lead Plastic SOT-23 0°C to 70°C LT1783IS5#TRMPBF LT1783IS5#TRPBF LTLG 5-Lead Plastic SOT-23 –40°C to 85°C LT1783HS5#TRMPBF LT1783HS5#TRPBF LTXR 5-Lead Plastic SOT-23 –40°C to 125°C LT1783CS6#TRMPBF LT1783CS6#TRPBF LTIU 6-Lead Plastic SOT-23 0°C to 70°C LT1783IS6#TRMPBF LT1783IS6#TRPBF LTIV 6-Lead Plastic SOT-23 –40°C to 85°C LT1783HS6#TRMPBF LT1783HS6#TRPBF LTXS 6-Lead Plastic SOT-23 –40°C to 125°C TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on 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/ 1783fd 2 LT1783 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at TA = 25°C. 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) SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage TA = 25°C 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C IOS Input Offset Voltage Drift (Note 9) Input Offset Current Input Bias Current VCM = 18V (Note 5) SHDN or VS = 0V, VCM = 0V to 18V en in RIN CIN CMRR PSRR AVOL Input Bias Current Drift Input Noise Voltage Input Noise Voltage Density Input Noise Current Density Input Resistance Input Capacitance Input Voltage Range Common Mode Rejection Ratio (Note 5) Power Supply Rejection Ratio Large-Signal Voltage Gain VOL Output Voltage Swing LOW VOH Output Voltage Swing HIGH ISC IS ISHDN Short-Circuit Current (Note 2) Minimum Supply Voltage Reverse Supply Voltage Supply Current (Note 6) Supply Current, SHDN Shutdown Pin Current Shutdown Output Leakage Current Maximum Shutdown Pin Current l l 2 4 l l l l l 0.1Hz to 10Hz f = 1kHz f = 1kHz Differential Common Mode, VCM = 0V to (VCC – 1V) Common Mode, VCM = 0V to 18V VCM = 0V to VCC – 1V VCM = 0V to 18V (Note 8) VS = 3V to 12.5V, VCM = VO = 1V VS = 3V, VO = 500mV to 2.5V, RL = 10k VS = 3V, 0°C ≤ TA ≤ 70°C VS = 3V, –40°C ≤ TA ≤ 85°C VS = 5V, VO = 500mV to 4.5V, RL = 10k VS = 5V, 0°C ≤ TA ≤ 70°C VS = 5V, –40°C ≤ TA ≤ 85°C No Load ISINK = 5mA VS = 5V, ISINK = 10mA VS = 3V, No Load VS = 3V, ISOURCE = 5mA VS = 5V, No Load VS = 5V, ISOURCE = 10mA VS = 3V, Short to GND VS = 3V, Short to VCC VS = 5V, Short to GND VS = 5V, Short to VCC l 0.65 l 0.3 l 0 90 68 90 200 133 100 400 250 200 l l l l l l l l l l l l l l 2.91 2.6 4.91 4.5 5 15 15 20 l IS = –100μA l 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C VPIN5 = 2V, No Load (Note 10) VPIN5 = 0.3V, No Load (Note 10) VPIN5 = 2V, No Load (Note 10) VPIN5 = 5V, No Load (Note 10) VPIN5 = 2V, No Load (Note 10) VPIN5 = 18V, No Load (Note 10) l l l l l l l LT1783C/LT1783I TYP MAX 400 l VCM = 18V (Note 5) IB MIN 45 35 0.1 0.06 0.6 20 0.14 1.3 1 0.5 5 800 950 1100 5 8 7 80 60 18 100 80 100 1500 1500 3 200 330 2.94 2.8 4.94 4.74 10 30 30 40 2.5 8 400 600 210 300 350 375 18 2.7 18 5 0.5 2 5 0.05 10 8 1 30 UNITS μV μV μV μV/°C nA μA nA μA nA nA/°C μVP-P nV/√Hz pA/√Hz MΩ GΩ MΩ pF V dB dB dB V/mV V/mV V/mV V/mV V/mV V/mV mV mV mV V V V V mA mA mA mA V V μA μA μA μA nA μA μA μA μA 1783fd 3 LT1783 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at TA = 25°C. 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) SYMBOL PARAMETER CONDITIONS VL VH tON tOFF GBW Shutdown Pin Input Low Voltage Shutdown Pin Input High Voltage Turn-On Time Turn-Off Time Gain Bandwidth Product (Note 5) (Note 10) (Note 10) VPIN5 = 5V to 0V, RL = 10k (Note 10) VPIN5 = 0V to 5V, RL = 10k (Note 10) f = 5kHz 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C SR Slew Rate (Note 7) FPBW tS Full-Power Bandwidth (Note 11) Settling Time AV = –1, RL = ∞ 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C VOUT = 2VP-P THD Distortion MIN LT1783C/LT1783I TYP MAX l l l l l l 0.3 2 750 600 550 0.24 0.21 0.19 VS = 5V, ΔVOUT = 2V to 0.1%, AV = –1 VS = 3V, VO = 2VP-P , AV = 1, RL = 10k, f = 1kHz 25 3 1250 0.42 UNITS V V μs μs kHz kHz kHz V/μs V/μs V/μs 66 12 kHz μs 0.001 % The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at TA = 25°C. VS = ±5V, VCM = 0V, VOUT = 0V, for the 6-lead part VPIN5 = V –, pulse power tested unless otherwise specified. (Note 4) SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage TA = 25°C 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C IOS IB en in RIN CIN Input Offset Voltage Drift (Note 9) Input Offset Current Input Bias Current Input Bias Current Drift Input Noise Voltage Input Noise Voltage Density Input Noise Current Density Input Resistance CMRR AVOL Input Capacitance Input Voltage Range Common Mode Rejection Ratio Large-Signal Voltage Gain VOL Output Voltage Swing LOW VOH Output Voltage Swing HIGH ISC Short-Circuit Current (Note 2) PSRR Power Supply Rejection Ratio LT1783C/LT1783I MIN TYP MAX 500 l l l l l l 0.1Hz to 10Hz f = 1kHz f = 1kHz Differential Common Mode, VCM = –5V to 13V VCM = –5V to 13V VO = ±4V, RL= 10k 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C No Load ISINK = 5mA ISINK = 10mA No Load ISOURCE = 5mA ISOURCE = 10mA Short to GND 0°C ≤ TA ≤ 70°C VS = ±1.5V to ±9V l l 0.65 0.3 l –5 68 70 50 40 l l l l l l l l l l l 4.91 4.6 4.5 18 15 90 2 4 40 0.06 1 20 0.14 1.3 0.5 5 900 1050 1200 5 8 80 13 80 160 –4.997 –4.8 –4.67 4.94 4.8 4.74 30 100 –4.992 –4.6 –4.4 UNITS μV μV μV μV/°C nA nA nA/°C μVP-P nV/√Hz pA/√Hz MΩ MΩ pF V dB V/mV V/mV V/mV V V V V V V mA mA dB 1783fd 4 LT1783 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified temperature range, otherwise specifications are at TA = 25°C. VS = ±5V, VCM = 0V, VOUT = 0V, for the 6-lead part VPIN5 = V –, pulse power tested unless otherwise specified. (Note 4) SYMBOL PARAMETER IS Supply Current ISHDN Supply Current, SHDN Shutdown Pin Current VL VH tON tOFF GBW Maximum Shutdown Pin Current Shutdown Output Leakage Current Shutdown Pin Input Low Voltage Shutdown Pin Input High Voltage Turn-On Time Turn-Off Time Gain Bandwidth Product SR Slew Rate FPBW tS Full-Power Bandwidth (Note 11) Settling Time LT1783C/LT1783I MIN TYP MAX CONDITIONS 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C VPIN5 = –3V, VS = ±5V, No Load (Note 10) VPIN5 = –4.7V, VS = ±5V, No Load (Note 10) VPIN5 = –3V, VS = ±5V, No Load (Note 10) VPIN5 = 9V, VS = ±9V (Note 10) VPIN5 = –7V, VS = ±9V, No Load (Note 10) VS = ±5V (Note 10) VS = ±5V (Note 10) VPIN5 = 0V to –5V, RL = 10k (Note 10) VPIN5 = –5V to 0V, RL = 10k (Note 10) f = 5kHz 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C AV = –1, RL = ∞, VO = ±4V, Measured at VO = ±2V 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C VOUT = 8VP-P 230 l l l 6 0.5 2 10 0.05 l l l l l l l l 8 30 1 –4.7 –2.8 l l l 325 375 400 20 800 700 625 0.26 0.23 0.21 25 3 1300 0.45 18 10 ΔVOUT = 4V to 0.1%, AV = 1 UNITS μA μA μA μA nA μA μA μA V V μs μs kHz kHz kHz V/μs V/μs V/μs kHz μs The l denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 125°C. 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) SYMBOL PARAMETER VOS Input Offset Voltage CONDITIONS IB LT1783H TYP MAX UNITS 850 3 μV mV l 15 μV/°C VCM = 18V (Note 5) l l 15 10 nA μA VCM = 18V (Note 5) l l 150 150 nA μA 400 l Input Offset Voltage Drift (Note 9) IOS MIN Input Offset Current Input Bias Current Input Voltage Range CMRR Common Mode Rejection Ratio VCM = 0.3V to VCC – 1V VCM = 0.3V to 18V AVOL Large-Signal Voltage Gain VS = 3V, VO = 500mV to 2.5V, RL = 10k VS = 5V, VO = 500mV to 4.5V, RL = 10k l 0.3 l l 76 60 l 200 50 1500 V/mV V/mV l 400 100 1500 V/mV V/mV 18 V dB dB 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 2.30 V V VS = 5V, No Load VS = 5V, ISOURCE = 10mA l l 4.85 4 V V VS = 3V to 12.5V, VCM = VO = 1V l 80 PSRR Power Supply Rejection Ratio 15 800 1200 mV mV mV dB 1783fd 5 LT1783 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 125°C. 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) SYMBOL PARAMETER CONDITIONS Minimum Supply Voltage Reverse Supply Voltage IS ISHDN IS = –100μA Supply Current MIN l 2.7 l 18 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 MAX UNITS V V 210 l Supply Current, SHDN LT1783H TYP 300 600 μA μA 25 μA 12 nA μA 0.5 Output Leakage Current VPIN5 = 2V, No Load (Note 10) l 2.5 μA Maximum Shutdown Pin Current VPIN5 = 18V, No Load (Note 10) l 40 μA GBW Gain Bandwidth Product f = 5kHz (Note 5) SR Slew Rate AV = –1, RL = ∞ (Note 7) l 750 400 1250 kHz kHz l 0.24 0.12 0.42 V/μs V/μs The l denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 125°C. VS = ±5V, VCM = 0V, VOUT = 0V, VSHDN = V –, TA = –40°C to 125°C, for the 6-lead part VPIN5 = V–, pulse power tested unless otherwise specified. (Note 4) SYMBOL PARAMETER VOS Input Offset Voltage CONDITIONS MIN LT1783H TYP 500 l MAX UNITS 950 3.1 μV mV 15 μV/°C Input Offset Voltage Drift (Note 9) l IOS Input Offset Current l 15 nA IB Input Bias Current l 150 nA CMRR Common Mode Rejection Ratio VCM = –4.7V to 13V AVOL Large-Signal Voltage Gain VO = ±4V, RL = 10k VO Output Voltage Swing PSRR Power Supply Rejection Ratio l 60 l 70 10 No Load IOUT = ±5mA IOUT = ±10mA l l l ±4.85 ±4.20 ±3.80 V V V VS = ±1.5V to ±9V l 80 dB l ±1.35 V Minimum Supply Voltage IS ISHDN Supply Current dB 160 230 l V/mV V/mV 325 650 μA μA 25 μA 12 nA μA 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 (Note 10) l 45 μA Output Leakage Current VPIN5 = –7V, VS = ±9V, No Load l 3 μA 0.5 VL Shutdown Pin Input Low Voltage VS = ±5V l VH Shutdown Pin Input High Voltage VS = ±5V l –2.8 GBW Gain Bandwidth Product f = 5kHz l 800 425 1300 kHz kHz SR Slew Rate AV = –1, RL = ∞, VO = 4V Measured at VO = ±2V l 0.26 0.14 0.45 V/μs V/μs –4.7 V V 1783fd 6 LT1783 ELECTRICAL CHARACTERISTICS 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 from the slew rate: FPBW = SR/2πVP . 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 LT1783C and LT1873I are guaranteed functional over the operating temperature range of –40°C to 85°C. The LT1783H is guaranteed functional over the operating temperature range of –40°C to 125°C. Note 4: The LT1783C is guaranteed to meet specified performance from 0°C to 70°C. The LT1783C is designed, characterized and expected to meet specified performance from –40°C to 85°C but is not tested or QA sampled at these temperatures. The LT1783I is guaranteed to meet specified performance from –40°C to 85°C. The LT1783H is guaranteed to meet specified performance from –40°C to 125°C. TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs Supply Voltage 300 240 TA = 25°C 220 200 180 TA = –55°C 160 140 100 TA = –55°C 0 TA = 125°C –100 4 6 8 10 12 14 SUPPLY VOLTAGE (V) 16 0 1 2 3 4 TOTAL SUPPLY VOLTAGE (V) 10000 250 TA = –55°C 150 100 TA = 25°C TA = 125°C OUTPUT SATURATION VOLTAGE (V) INPUT BIAS CURRENT (nA) Output Saturation Voltage vs Load Current (Output Low) 1 VS = ±2.5V VOD = 30mV 40000 0 1783 G03 1 50000 –50 0 –10–8 –6 –4 –2 0 2 4 6 8 10 12 14 16 18 VIN (V) 5 Output Saturation Voltage vs Load Current (Output High) 20000 + – 1783 G02 Input Bias Current vs Common Mode Voltage 50 VIN 1 18 30000 5V 2 –300 1783 G01 200 3 TA = 25°C –200 –400 2 VS = 5V, 0V 4 200 OUTPUT SATURATION VOLTAGE (V) SUPPLY CURRENT (μA) TA = 125°C 260 5 300 VOUT (V) INPUT OFFSET VOLTAGE CHANGE (μV) 400 280 120 Output Voltage vs Large Input Voltage Minimum Supply Voltage TA = 125°C 0.1 TA = –55°C TA = 25°C VS = ±2.5V VOD = 30mV TA = 125°C 0.1 0.01 TA = 25°C TA = –55°C 3.8 4 4.2 4.4 4.6 4.8 5 5.2 5.4 5.6 14 16 18 COMMON MODE VOLTAGE (V) 1783 G04 0.01 1μ 0.001 10μ 100μ 1m SOURCING LOAD CURRENT (A) 10m 1783 G05 1μ 100μ 1m 10μ SINKING LOAD CURRENT (A) 10m 1783 G06 1783fd 7 LT1783 TYPICAL PERFORMANCE CHARACTERISTICS Output Saturation Voltage vs Input Overdrive Output Short-Circuit Current vs Temperature 55 0.1Hz to 10Hz Noise Voltage VS = ±2.5V VS = ±5V OUTPUT HIGH 10 OUTPUT LOW NOISE VOLTAGE (400nV/DIV) 50 OUTPUT CURRENT (mA) OUTPUT SATURATION VOLTAGE (mV) 100 SOURCING CURRENT 45 40 SINKING CURRENT 35 VS = ±2.5V NO LOAD 1 0 10 20 30 40 50 INPUT OVERDRIVE (mV) 30 –50 60 –25 0 25 50 75 TEMPERATURE (°C) 100 1783 G07 40 30 20 1 10 100 1k FREQUENCY (Hz) 10k 2.0 1.5 1.0 0.5 0 9 10 1 100 1k FREQUENCY (Hz) 10k 10 120 100 80 40 60 30 40 20 20 GAIN 10 0 0 –20 –10 –40 –20 –60 –30 1k 10k 100k 1M FREQUENCY (Hz) –80 10M 1783 G12 1783 G11 Slew Rate vs Temperature 0.8 VS = ±5V 0.7 SLEW RATE (V/μs) GAIN BANDWIDTH (kHz) 8 PHASE 50 f = 5kHz VS = ±2.5V 1300 1250 1200 1150 1100 –50 7 VS = ±2.5V 60 2.5 Gain Bandwidth Product vs Temperature 1350 4 5 6 TIME (sec) 70 VS = ±2.5V 1783 G10 1400 3 Gain and Phase Shift vs Frequency GAIN (dB) INPUT NOISE CURRENT DENSITY (pA/√Hz) 50 2 PHASE SHIFT (DEG) INPUT NOISE VOLTAGE DENSITY (nV/√Hz) 3.0 VS = ±2.5V 1 1783 G09 Input Noise Current vs Frequency 60 10 0 1783 G08 Noise Voltage Density vs Frequency 70 125 RISING 0.6 0.5 FALLING 0.4 0.3 –25 0 25 50 75 TEMPERATURE (°C) 100 125 1783 G13 0.2 –50 –25 0 25 50 75 TEMPERATURE (°C) 100 125 1783 G14 1783fd 8 LT1783 TYPICAL PERFORMANCE CHARACTERISTICS Gain Bandwidth Product and Phase Margin vs Supply Voltage Gain Bandwidth and Phase Margin vs Load Resistance PHASE MARGIN PHASE MARGIN (DEG) 60 65 60 PHASE MARGIN 55 PHASE MARGIN (DEG) 65 AV = –1 RF = RG = 10k f = 5kHz GAIN BAINDWIDTH PRODUCT (kHz) 55 GAIN BAINDWIDTH PRODUCT (kHz) 1300 GAIN BANDWIDTH PRODUCT 1250 1200 0 2 4 6 8 10 12 14 16 TOTAL SUPPLY VOLTAGE (V) 1400 GAIN BANDWIDTH PRODUCT 1200 VS = 2.5V AV = –1 RF = RG = 10k f = 5kHz 1000 800 1k 18 10k LOAD RESISTANCE (Ω) 100k 1783 G16 1783 G15 PSRR vs Frequency VS = ±2.5V 70 60 POSITIVE SUPPLY 50 40 30 NEGATIVE SUPPLY 20 10 0 –10 10k 100k FREQUENCY (Hz) 1k Output Impedance vs Frequency 100 AV = 100 90 80 70 60 50 10 AV = 10 1 0.1 AV = 1 40 30 10k 1M VS = ±2.5V VS = ±2.5V 100 OUTPUT IMPEDANCE (Ω) 80 CMRR vs Frequency 110 COMMON MODE REJECTION RATIO (dB) POWER SUPPLY REJECTION RATIO (dB) 90 100k FREQUENCY (Hz) 0.01 100 1M 1k 10k 100k FREQUENCY (Hz) 1783 G17 1783 G19 1783 G18 Disabled Output Impedance vs Frequency (Note 8) 1M Settling Time to 0.1% vs Output Step 40 VS = 5V, 0V 35 VCM = 2.5V VS = ±5V 3 AV = 1 AV = –1 2 10k 30 OVERSHOOT (%) 100k OUTPUT STEP (V) OUTPUT IMPEDANCE (Ω) Capacitive Load Handling Overshoot vs Capacitive Load 4 VS = ±2.5V VPIN5 (SHUTDOWN) = 2.5V 1 0 –1 AV = 1 10k 100k FREQUENCY (Hz) 1M 1783 G20 AV = 1 15 AV = 5 5 AV = 10 0 –4 1k 20 AV = –1 –3 100 100 25 10 –2 1k 1M 0 2 4 6 8 10 12 14 16 18 20 SETTLING TIME (μs) 1783 G21 10 100 1000 CAPACITIVE LOAD (pF) 10000 1783 G22 1783fd 9 LT1783 TYPICAL PERFORMANCE CHARACTERISTICS Total Harmonic Distortion + Noise vs Frequency 1 12 THD + NOISE (%) 6 VS = ±2.5V 4 0.010 AV = –1 0.001 2 100k 10 100 1k 10k FREQUENCY (Hz) 100k 1783 G23 AV = –1 RF = RG = 100k VS = ±1.5V VCM = 0V THD + NOISE (%) AV = –1 RF = RG = 100k VS = 3V, 0V VCM = 1.5V AV = 1 VS = 3V, 0V VCM = 1.5V 0.01 AV = 1 VS = ±1.5V VCM = 0V 0.001 0 1 2 OUTPUT VOLTAGE AMPLITUDE (VP-P) 1k 10k LOAD RESISTANCE TO GROUND (Ω) 3 1783 G25 275 RL = 2k RL = 10k RL = 50k –6 –5 –4 –3 –2 –1 0 1 2 3 OUTPUT VOLTAGE (V) 4 5 6 VS = 5V, 0V 250 TA = 125°C 225 200 TA = 25°C 175 150 TA = –55°C 125 100 75 50 25 0 0 0.5 1 1.5 2 SHUTDOWN PIN VOLTAGE (V) 1783 G27 Large-Signal Response 100k Supply Current vs SHDN Pin Voltage VS = ±5V 1783 G26 VS = ±5V AV = 1 CL = 15pF 0.0001 100 Open-Loop Gain INPUT OFFSET VOLTAGE CHANGE (50μV/DIV) 10 0.1 VS = 3V, 0V VIN = 0.2V TO 2.2V 1783 G24 Total Harmonic Distortion + Noise vs Output Voltage Amplitude 1 VS = 3V, 0V VIN = 0.5V TO 2.5V 0.001 0.0001 1k 10k FREQUENCY (Hz) VS = 3V TOTAL AV = 1 VIN = 2VP-P AT 1kHz 0.01 AV = 1 DISTORTION ≤ 1% AV = 1 0 100 VS = ±1.5V VIN = ±1V 0.1 SUPPLY CURRENT PER AMPLIFIER (μA) OUTPUT SWING (VP-P) 0.1 8 1 VS = 3V, 0V VOUT = 2VP-P VCM = 1.2V RL = 10k VS = ±5V 10 Total Harmonic Distortion + Noise vs Load Resistance THD + NOISE (%) Undistorted Output Swing vs Frequency 2.5 1783 G28 Small-Signal Response 1783 G29 VS = ±5V AV = 1 CL = 15pF 1783 G30 1783fd 10 LT1783 APPLICATIONS INFORMATION Supply Voltage Output The positive supply pin of the LT1783 should be bypassed with a small capacitor (typically 0.1μF) within an inch of the pin. When driving heavy loads, an additional 4.7μF electrolytic capacitor should be used. When using split supplies, the same is true for the negative supply pin. The output of the LT1783 can swing to within 60mV of the positive rail with no load and within 3mV of the negative rail with no load. When monitoring input 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 LT1783 can sink and source over 30mA at ±5V supplies, sourcing current is reduced to 10mA at 3V total supplies as noted in the Electrical Characteristics. The LT1783 is protected against reverse-battery voltages up to 18V. In the event a reverse-battery condition occurs, the supply current is less than 1nA. Inputs The LT1783 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 –40nA. 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 80nA. 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 transistors, along with special geometries for these NPN transistors, allow the LT1783 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 30μA at room temperature. The input offset voltage is typically 1.8mV when operating above V+. The LT1783 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 1k resistor in series with each input and a diode from the input to the negative supply. The input stage of the LT1783 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. The LT1783 is internally compensated to drive at least 400pF of capacitance under any output loading conditions. A 0.22μF capacitor in series with a 150Ω resistor between the output and ground will compensate these amplifiers for larger capacitive loads, up to 10,000pF, at all output currents. 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 LT1783 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 LT1783 should be operated single supply, with the output always sourcing current and with the input voltage swing between ground and (V+ – 0.8V). See the Typical Performance Characteristics curves, “Total Harmonic Distortion + Noise vs Output Voltage Amplitude.” 1783fd 11 LT1783 APPLICATIONS INFORMATION Gain Shutdown 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. 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 5μA and the output leakage current is less than 1μA (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 Voltage.” SIMPLIFIED SCHEMATIC V+ Q2 Q1 Q3 SHDN R1 6k R2 1k Q4 Q19 –IN Q17 + J1 Q7 R3 1k 10μA Q8 Q11 OUT Q16 Q9 Q5 Q18 Q15 Q26 Q24 Q20 Q12 +IN Q25 Q23 Q22 D3 D1 Q6 D4 D5 Q10 Q13 Q14 R4 8k Q21 R5 8k V– 1783 SS 1783fd 12 LT1783 TYPICAL APPLICATION Protected Fault Conditions OK! –18V OK! 5V V+ V+ LT1783 LT1783 + 24V REVERSE BATTERY 18V 5V + OK! LT1783 LT1783 10V INPUT DIFFERENTIAL VOLTAGE 5V + OK! INPUT OVERVOLTAGE INPUTS BELOW GROUND 1783 TA02 1783fd 13 LT1783 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 1783fd 14 LT1783 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 S6 TSOT-23 0302 REV B 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 1783fd 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 LT1783 TYPICAL APPLICATION Current Source VCC LT1634-1.25 R1 + LT1783 2N3906 – IOUT = 1.25V R1 1783 TA03 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1782 Micropower, Over-The-Top SOT-23 Rail-to-Rail Input and Output Op Amp SOT-23 Package, Micropower 40μA per Amplifier, Rail-to-Rail Input and Output, 200kHz 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 50μA per Amplifier, Rail-to-Rail Input and Output , 200kHz GBW LT1636 Single Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp 55μA Supply Current, VCM Extends 44V Above VEE, Independent of VCC, MSOP Package, Shutdown Function LT1638/LT1639 Dual/Quad, 1.2MHz, 0.4V/μs, Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps 170μA Supply Current, Single Supply Input Range: –0.4V to 44V, Rail-to-Rail Input and Output 1783fd 16 Linear Technology Corporation LT 0609 REV D • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 1999