LT1636 Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO Rail-to-Rail Input and Output Micropower: 50µA IQ, 44V Supply Operating Temperature Range: – 40°C to 125°C Over-The-Top®: Input Common Mode Range Extends 44V Above VEE, Independent of VCC Low Input Offset Voltage: 225µV Max Specified on 3V, 5V and ±15V Supplies High Output Current: 18mA Output Shutdown Output Drives 10,000pF with Output Compensation Reverse Battery Protection to 27V High Voltage Gain: 2000V/mV High CMRR: 110dB 220kHz Gain-Bandwidth Product 8-Lead DFN, MSOP, PDIP and SO Packages U APPLICATIO S ■ ■ ■ ■ Battery- or Solar-Powered Systems Portable Instrumentation Sensor Conditioning Supply Current Sensing Battery Monitoring MUX Amplifiers 4mA to 20mA Transmitters Over-The-Top is a registered trademark of Linear Technology Corporation. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. U ■ The LT®1636 op amp operates on all single and split supplies with a total voltage of 2.7V to 44V drawing less than 50µA of quiescent current. The LT1636 can be shut down, making the output high impedance and reducing the quiescent current to 4µA. The LT1636 has a unique input stage that operates and remains high impedance when above the positive supply. The inputs take 44V both differential and common mode, even when operating on a 3V supply. The output swings to both supplies. Unlike most micropower op amps, the LT1636 can drive heavy loads; its rail-to-rail output drives 18mA. The LT1636 is unity-gain stable into all capacitive loads up to 10,000pF when a 0.22µF and 150Ω compensation network is used. The LT1636 is reverse supply protected: it draws no current for reverse supply up to 27V. Built-in resistors protect the inputs for faults below the negative supply up to 22V. There is no phase reversal of the output for inputs 5V below VEE or 44V above VEE, independent of VCC. The LT1636 op amp is available in the 8-pin MSOP, PDIP and SO packages. For space limited applications the LT1636 is available in a 3mm × 3mm × 0.8mm dual fine pitch leadless package (DFN). TYPICAL APPLICATIO Input Bias Current vs Common Mode Voltage 5000 Over-The-Top Current Source with Shutdown VS = 5V, 0V LT1004-1.2 R* 1M R + LT1636 TPO610 – IOUT SHDN IOUT = 1.2 R e.g., 10mA = 120Ω *OPTIONAL FOR LOW OUTPUT CURRENTS 1636 TA01 INPUT BIAS CURRENT (nA) 3000 4V TO 44V 1000 40 30 TA = – 55°C 20 10 TA = 125°C TA = 25°C 0 –10 4.0 4.4 4.8 5.2 10 20 30 40 50 COMMON MODE VOLTAGE (V) 1636 G03 1636fc 1 LT1636 U W W W ABSOLUTE MAXIMUM RATINGS Total Supply Voltage (V + (Note 1) V –) to .............................. 44V Input Differential Voltage ......................................... 44V Input Current ...................................................... ±25mA Shutdown Pin Voltage Above V – ............................. 32V Shutdown Pin Current ....................................... ±10mA Output Short-Circuit Duration (Note 2) ......... Continuous Operating Temperature Range (Note 3) LT1636C/LT1636I .............................. – 40°C to 85°C LT1636H .......................................... – 40°C to 125°C Specified Temperature Range (Note 4) LT1636C/LT1636I .............................. – 40°C to 85°C LT1636H .......................................... – 40°C to 125°C Junction Temperature ........................................... 150°C Junction Temperature (DD Package) ................... 125°C Storage Temperature Range ................. – 65°C to 150°C Storage Temperature Range (DD Package) ....................................... – 65°C to 125°C Lead Temperature (Soldering, 10 sec).................. 300°C U W U PACKAGE/ORDER I FOR ATIO TOP VIEW NULL 1 TOP VIEW TOP VIEW NULL 8 + –IN 2 7 V +IN 3 6 OUT V– 4 5 SHDN DD PACKAGE 8-LEAD (3mm × 3mm) PLASTIC DFN NULL –IN +IN V– 8 7 6 5 1 2 3 4 NULL V+ OUT SHDN MS8 PACKAGE 8-LEAD PLASTIC MSOP NULL 1 8 NULL –IN 2 7 V+ +IN 3 6 OUT V– 4 5 SHDN N8 PACKAGE 8-LEAD PDIP TJMAX = 150°C, θJA = 250°C/W S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 150°C/W (N8) TJMAX = 150°C, θJA = 190°C/W (S8) TJMAX = 125°C, θJA = 160°C/W (NOTE 2) UNDERSIDE METAL CONNECTED TO V – ORDER PART NUMBER DD PART* MARKING ORDER PART NUMBER MS8 PART* MARKING ORDER PART NUMBER S8 PART* MARKING LT1636CDD LT1636IDD LAAJ LT1636CMS8 LT1636IMS8 LTCL LT1636CN8 LT1636CS8 LT1636IN8 LT1636IS8 LT1636HS8 1636 1636I 1636H *The temperature grades are identified by a label on the shipping container. Consult factory for parts specified with wider operating temperature ranges. U 3V A D 5V ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise specified. (Note 4) SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS N8 Package 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C S8 Package 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C MS8 Package 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C ● ● ● ● ● ● LT1636C/LT1636I MIN TYP MAX 50 225 400 550 50 225 600 750 50 225 700 1050 UNITS µV µV µV µV µV µV µV µV µV 1636fc 2 LT1636 U 3V A D 5V ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise specified. (Note 4) SYMBOL PARAMETER Input Offset Voltage Drift (Note 9) IOS CONDITIONS DD Package 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C N8 Package, – 40°C ≤ TA ≤ 85°C S8 Package, – 40°C ≤ TA ≤ 85°C MS8 Package, – 40°C ≤ TA ≤ 85°C DD Package, – 40°C ≤ TA ≤ 85°C Input Offset Current VCM = 44V (Note 5) IB en in RIN CIN CMRR AVOL Input Bias Current Input Noise Voltage Input Noise Voltage Density Input Noise Current Density Input Resistance Input Capacitance Input Voltage Range Common Mode Rejection Ratio (Note 5) Large-Signal Voltage Gain VOL Output Voltage Swing LOW VOH Output Voltage Swing HIGH ISC Short-Circuit Current (Note 2) PSRR IS Power Supply Rejection Ratio Reverse Supply Voltage Supply Current ISD Supply Current, SHDN Shutdown Pin Current tON tOFF Output Leakage Current, SHDN Maximum Shutdown Pin Current Turn-On Time Turn-Off Time VCM = 44V (Note 5) VS = 0V 0.1Hz to 10Hz f = 1kHz f = 1kHz Differential Common Mode, VCM = 0V to 44V ● ● ● ● ● ● ● ● ● ● ● VCM = 0V to VCC – 1V VCM = 0V to 44V (Note 8) 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 VS = 2.7V to 12.5V, VCM = VO = 1V IS = – 100µA (Note 6) ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● VPIN5 = 2V, No Load (Note 6) VPIN5 = 0.3V, No Load (Note 6) VPIN5 = 2V, No Load (Note 5) VPIN5 = 2V, No Load (Note 6) VPIN5 = 32V, No Load (Note 5) VPIN5 = 5V to 0V, RL = 10k VPIN5 = 0V to 5V, RL = 10k ● ● ● ● ● LT1636C/LT1636I MIN TYP MAX 75 425 900 1050 1 5 2 8 2 10 2 10 0.1 0.8 0.6 5 8 3 6 0.1 0.7 52 0.035 6 10 7 15 4 0 44 84 110 86 98 200 1300 133 100 400 2000 250 200 2 10 480 875 860 1600 2.95 2.985 2.55 2.8 4.95 4.985 4.30 4.75 7 15 20 42 12 25 25 50 90 103 27 40 42 55 60 4 12 0.5 15 1.1 5 0.05 1 27 150 120 2.5 UNITS µV µV µV µV/°C µV/°C µV/°C µV/°C nA µA nA µA nA µVP-P nV/√Hz pA/√Hz MΩ MΩ pF V 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 dB V µA µA µA nA µA µA µA µs µs 1636fc 3 LT1636 U 3V A D 5V ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise specified. (Note 4) SYMBOL GBW SR PARAMETER Gain Bandwidth Product (Note 5) Slew Rate (Note 7) CONDITIONS f = 1kHz 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C AV = – 1, RL = ∞ 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C ● ● ● ● LT1636C/LT1636I MIN TYP MAX 110 200 100 90 0.035 0.07 0.031 0.030 UNITS kHz kHz kHz V/µs V/µs V/µs ±15V ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C. VS = ±15V, VCM = 0V, VOUT = 0V, VSHDN = V – unless otherwise specified. (Note 4) LT1636C/LT1636I MIN TYP MAX SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage N8 Package 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C ● ● S8 Package 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C ● ● MS8 Package 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C ● ● DD Package 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C ● ● N8 Package, – 40°C ≤ TA ≤ 85°C S8 Package, – 40°C ≤ TA ≤ 85°C MS8 Package, – 40°C ≤ TA ≤ 85°C DD Package, – 40°C ≤ TA ≤ 85°C Input Offset Voltage Drift (Note 9) IOS Input Offset Current IB Input Bias Current Input Noise Voltage UNITS 100 450 550 700 µV µV µV 100 450 750 900 µV µV µV 100 450 850 1200 µV µV µV 125 650 1050 1200 µV µV µV ● ● ● ● 1 2 2 2 4 8 10 10 µV/°C µV/°C µV/°C µV/°C ● 0.2 1.0 nA ● 4 10 0.1Hz to 10Hz nA µVP-P 1 en Input Noise Voltage Density f = 1kHz 52 nV/√Hz in Input Noise Current Density f = 1kHz 0.035 pA/√Hz RIN Input Resistance Differential Common Mode, VCM = – 15V to 14V 13 12000 MΩ MΩ CIN Input Capacitance 4 pF 5.2 ● – 15 CMRR Common Mode Rejection Ratio VCM = – 15V to 29V ● 86 103 dB AVOL Large-Signal Voltage Gain VO = ±14V, RL = 10k 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C 100 75 50 500 ● ● V/mV V/mV V/mV VOL Output Voltage Swing LOW No Load ISINK = 5mA ISINK = 10mA ● ● ● VOH Output Voltage Swing HIGH No Load ISOURCE = 5mA ISOURCE = 10mA ● ● ● Input Voltage Range 29 – 14.997 – 14.500 – 14.125 14.9 14.5 14.3 14.975 14.750 14.650 – 14.95 – 14.07 – 13.35 V V V V V V V 1636fc 4 LT1636 ±15V ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 85°C, otherwise specifications are at TA = 25°C. VS = ±15V, VCM = 0V, VOUT = 0V, VSHDN = V – unless otherwise specified. (Note 4) SYMBOL PARAMETER ISC Short-Circuit Current (Note 2) PSRR Power Supply Rejection Ratio IS Supply Current LT1636C/LT1636I MIN TYP MAX CONDITIONS Short to GND 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C VS = ±1.35V to ±22V ±30 ● ● ±18 ±15 ±10 ● 90 114 GBW SR mA mA mA dB 50 70 85 µA µA ● ISHDN UNITS Positive Supply Current, SHDN VPIN5 = – 20V, VS = ±22V, No Load ● 12 30 µA Shutdown Pin Current VPIN5 = – 21.7V, VS = ±22V, No Load VPIN5 = – 20V, VS = ±22V, No Load ● ● 0.7 1.2 15 8 nA µA Maximum Shutdown Pin Current VPIN5 = 32V, VS = ±22V ● 27 150 µA Output Leakage Current, SHDN VPIN5 = – 20V, VS = ±22V, No Load ● 0.1 2 Gain Bandwidth Product f = 1kHz 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C AV = – 1, RL = ∞, VO = ±10V Measured at ±5V 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C Slew Rate µA 220 ● ● 125 110 100 kHz kHz kHz 0.0375 0.033 0.030 0.075 ● ● V/µs V/µs V/µs U 3V A D 5V ELECTRICAL CHARACTERISTICS The ● 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 unless otherwise specified. (Note 4) SYMBOL PARAMETER VOS Input Offset Voltage CONDITIONS MIN LT1636H TYP MAX UNITS 50 325 3 µV mV 3 10 µV/°C ● ● Input Offset Voltage Drift (Note 9) IOS IB VCM = 44V (Note 5) ● ● 3 1 nA µA VCM = 44V (Note 5) ● ● 30 10 nA µA Input Offset Current Input Bias Current Input Voltage Range CMRR Common Mode Rejection Ratio (Note 5) VCM = 0.3V to VCC – 1V VCM = 0.3V to 44V AVOL Large-Signal Voltage Gain VS = 3V, VO = 500mV to 2.5V, RL = 10k VS = 5V, VO = 500mV to 4.5V, RL = 10k ● 0.3 ● ● 72 74 200 20 1300 ● V/mV V/mV 400 35 2000 ● V/mV V/mV 44 V dB dB VOL Output Voltage Swing LOW No Load ISINK = 2.5mA ● ● VOH Output Voltage Swing HIGH VS = 3V, No Load VS = 3V, ISOURCE = 5mA ● ● 2.925 2.35 V V VS = 5V, No Load VS = 5V, ISOURCE = 10mA ● ● 4.925 4.10 V V VS = 2.7V to 12.5V, VCM = VO = 1V ● 80 dB ● 2.7 V PSRR Power Supply Rejection Ratio Minimum Supply Voltage 15 875 mV mV 1636fc 5 LT1636 U 3V A D 5V ELECTRICAL CHARACTERISTICS The ● 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 unless otherwise specified. (Note 4) SYMBOL IS ISD PARAMETER CONDITIONS Reverse Supply Voltage IS = – 100µA Supply Current (Note 6) MIN ● LT1636H TYP MAX 25 UNITS V 42 ● 55 75 µA µA Supply Current, SHDN VPIN5 = 2V, No Load (Note 6) ● 15 µA Shutdown Pin Current VPIN5 = 0.3V, No Load (Note 6) VPIN5 = 2V, No Load (Note 5) ● ● 200 7 nA µA Output Leakage Current, SHDN VPIN5 = 2V, No Load (Note 6) ● 5 µA ● Maximum Shutdown Pin Current VPIN5 = 32V, No Load (Note 5) GBW Gain Bandwidth Product f = 1kHz (Note 5) SR Slew Rate AV = – 1, RL = ∞ (Note 7) 200 µA 200 ● 110 60 kHz kHz 0.035 0.015 0.07 ● V/µs V/µs ±15V ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range of –40°C ≤ TA ≤ 125°C. VS = ±15V, VCM = 0V, VOUT = 0V, VSHDN = V – unless otherwise specified. (Note 4) SYMBOL PARAMETER VOS Input Offset Voltage CONDITIONS MIN LT1636H TYP MAX UNITS 100 550 3.4 µV mV 3 11 µV/°C ● Input Offset Voltage Drift (Note 9) ● IOS Input Offset Current ● IB Input Bias Current CMRR Common Mode Rejection Ratio VCM = – 14.7V to 29V AVOL Large-Signal Voltage Gain VO = ±14V, RL = 10k ● ● 72 ● 100 4 Output Voltage Swing No Load IOUT = ±2.5mA ● ● PSRR Power Supply Rejection Ratio VS = ±1.35V to ±22V ● 84 ● ±1.35 Minimum Supply Voltage nA 50 nA dB 500 V/mV V/mV ±14.8 ±14.3 VO IS 5 Supply Current V V dB V 50 ● 70 100 µA µA Positive Supply Current, SHDN VPIN5 = – 20V, VS = ±22V, No Load ● 40 µA Shutdown Pin Current VPIN5 = – 21.7V, VS = ±22V, No Load VPIN5 = – 20V, VS = ±22V, No Load ● ● 200 10 nA µA Maximum Shutdown Pin Current VPIN5 = 32V, VS = ±22V ● 200 µA Output Leakage Current, SHDN VPIN5 = – 20V, VS = ±22V, No Load ● 100 µA VL Shutdown Pin Input Low Voltage VS = ±22V ● VH Shutdown Pin Input High Voltage VS = ±22V ● –20 GBW Gain Bandwidth Product f = 1kHz 125 75 220 ● kHz kHz 0.0375 0.02 0.075 ● V/µs V/µs ISHDN SR Slew Rate AV = – 1, RL = ∞, VO = ±10V Measured at VO = ±5V –21.7 V V 1636fc 6 LT1636 ELECTRICAL CHARACTERISTICS sampled at these temperatures. The LT1636I is guaranteed to meet specified performance from – 40°C to 85°C. The LT1636H is guaranteed to meet specified performance from –40°C to 125°C. Note 5: VS = 5V limits are guaranteed by correlation to VS = 3V and VS = ±15V or VS = ±22V tests. Note 6: VS = 3V limits are guaranteed by correlation to VS = 5V and VS = ±15V or VS = ±22V tests. Note 7: Guaranteed by correlation to slew rate at VS = ±15V and GBW at VS = 3V and VS = ±15V tests. Note 8: This specification implies a typical input offset voltage of 600µV at VCM = 44V and a maximum input offset voltage of 3mV at VCM = 44V. Note 9: This parameter is not 100% tested. Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: A heat sink may be required to keep the junction temperature below absolute maximum. The θJA specified for the DD package is with minimal PCB heat spreading metal. A significant reduction in θJA can be obtained with expanded PCB metal area on all layers of a board. Note 3: The LT1636C and LT1636I are guaranteed functional over the operating temperature range of – 40°C to 85°C. The LT1636H is guaranteed functional over the operating temperature range of –40°C to 125°C. Note 4: The LT1636C is guaranteed to meet specified performance from 0°C to 70°C. The LT1636C is designed, characterized and expected to meet specified performance from – 40°C to 85°C but is not tested or QA U W TYPICAL PERFOR A CE CHARACTERISTICS Supply Current vs Supply Voltage 300 60 TA = 25°C 50 40 TA = – 55°C TA = 125°C 30 20 10 200 100 0 –100 TA = 125°C TA = – 55°C 5 10 15 20 25 30 35 40 TOTAL SUPPLY VOLTAGE (V) TA = 25°C 30 TA = – 55°C 20 10 TA = 125°C TA = 25°C 0 –10 0 45 1 2 3 4 TOTAL SUPPLY VOLTAGE (V) 5 4.0 1636 G03 Output Saturation Voltage vs Load Current (Output Low) Output Saturation Voltage vs Input Overdrive 10 1 OUTPUT SATURATION VOLTAGE (V) VS = 5V VOD = 30mV 0.1 TA = 125°C TA = 25°C TA = – 55°C 100 1636 G04 4.4 4.8 5.2 10 20 30 40 50 COMMON MODE VOLTAGE (V) 1636 G02 Output Saturation Voltage vs Load Current (Output High) 0.01 0.1 1 10 0.0001 0.001 0.01 SOURCING LOAD CURRENT (mA) 40 –200 1636 G01 OUTPUT SATURATION VOLTAGE (V) 1000 –300 0 VS = 5V, 0V 3000 100 VS = 5V VOD = 30mV OUTPUT SATURATION VOLTAGE (mV) SUPPLY CURRENT (µA) 70 5000 INPUT BIAS CURRENT (nA) CHANGE IN INPUT OFFSET VOLTAGE (µV) 80 0 Input Bias Current vs Common Mode Voltage Minimum Supply Voltage 1 0.1 TA = 125°C TA = 25°C 0.01 TA = – 55°C 0.001 0.1 1 10 0.0001 0.001 0.01 SINKING LOAD CURRENT (mA) 80 70 60 50 40 30 20 1636 G05 OUTPUT HIGH 10 0 100 VS = ± 2.5V NO LOAD 90 OUTPUT LOW 0 10 20 30 40 50 60 70 80 90 100 INPUT OVERDRIVE (mV) 1636 G06 1636fc 7 LT1636 U W TYPICAL PERFOR A CE CHARACTERISTICS Noise Voltage Density vs Frequency 0.1Hz to 10Hz Noise Voltage Input Noise Current vs Frequency 80 INPUT NOISE CURRENT DENSITY (pA/√Hz) NOISE VOLTAGE (400nV/DIV) INPUT NOISE VOLTAGE DENSITY (nV/√Hz) VS = ± 2.5V 0.35 70 60 50 40 3 4 5 6 TIME (SEC) 7 8 9 1 10 10 100 FREQUENCY (Hz) Open-Loop Gain and Phase Shift vs Frequency 100 GAIN (dB) PHASE 30 20 20 0 –20 0 – 40 –10 – 60 –20 – 80 GAIN-BANDWIDTH PRODUCT (kHz) 40 GAIN –100 –30 10k 100k FREQUENCY (Hz) 200 VS = ±1.5V 180 GAIN BANDWIDTH 30 200 20 180 5 10 15 20 25 30 35 40 TOTAL SUPPLY VOLTAGE (V) 45 1636 G13 COMMON MODE REJECTION RATIO (dB) GAIN-BANDWIDTH PRODUCT (kHz) 240 0 0.09 FALLING, VS = ±15V 0.08 0.07 FALLING, VS = ±1.5V 0.06 160 0.05 50 25 75 0 TEMPERATURE (°C) 100 0.04 – 50 125 – 25 0 50 75 25 TEMPERATURE (°C) 110 100 VS = ±15V 80 70 VS = ±1.5V 60 125 PSRR vs Frequency 80 90 100 1636 G12 120 PHASE MARGIN (DEG) 40 220 RISING, VS = ±15V 0.10 VS = ±15V CMRR vs Frequency PHASE MARGIN RISING, VS = ±1.5V 1636 G11 50 RL = 10k f = 1kHz 260 Slew Rate vs Temperature 0.11 220 Gain-Bandwidth Product and Phase Margin vs Supply Voltage 280 1635 G09 240 140 – 50 –25 1M 1000 0.12 1636 G10 300 10 100 FREQUENCY (Hz) f = 1kHZ PHASE SHIFT (DEG) 60 40 1k 0.05 1 260 80 50 10 0.10 Gain-Bandwidth Product vs Temperature VS = ±2.5V 60 0.15 1636 G08 1636 G07 70 0.20 1000 SLEW RATE (V/µs) 2 POWER SUPPLY REJECTION RATIO (dB) 1 0.25 0 30 0 0.30 50 40 30 70 VS = ±2.5V 60 POSITIVE SUPPLY 50 40 30 20 NEGATIVE SUPPLY 10 0 –10 – 20 20 1K 10K FREQUENCY (Hz) 100K 1636 G14 1k 10k FREQUENCY (Hz) 100k 1636 G15 1636fc 8 LT1636 U W TYPICAL PERFOR A CE CHARACTERISTICS Gain-Bandwidth Product and Phase Margin vs Load Resistance 400 70 350 60 300 50 250 40 200 30 150 20 OUTPUT IMPEDANCE (Ω) 1k PHASE MARGIN 35 VS = ± 2.5V AV = 100 100 AV = 10 10 AV = 1 100 20 15 10 1k 0.1 100 0 100k 10k LOAD RESISTANCE (Ω) 1k 10k FREQUENCY (Hz) 100 80 4 OVERSHOOT (%) AV = – 1 2 0 –2 AV = – 1 –4 AV = 1 –6 10 VS = 3V, 0V VOUT = 2VP-P VCM = 1.2V RL = 50k 1 70 AV = 1 60 AV = 2 THD + NOISE (%) AV = 1 Total Harmonic Distortion + Noise vs Frequency VS = ±2.5V ISOURCE = 40µA NO OUTPUT COMPENSATION 90 50 40 30 AV = 5 20 0.1 0.01 AV = 10 AV = – 1 AV = 1 10 –8 0 –10 40 60 80 100 120 140 160 SETTLING TIME (µs) 10 100 1000 CAPACITIVE LOAD (pF) 0.1 0.01 100 1k FREQUENCY (Hz) 10k 1636 G21 Total Harmonic Distortion + Noise vs Output Voltage 10 RL = 10k VCM = HALF SUPPLY f = 1kHz VS = 3V TOTAL AV = 1 VIN = 2VP-P AT 1kHz 1 10 1636 G20 Total Harmonic Distortion + Noise vs Load Resistance 10 0.001 10000 1636 G19 1 VS = ±1.5V VIN = ±1V THD + NOISE (%) 20 THD + NOISE (%) 0 100k 1635 G18 Capacitive Load Handling, Overshoot vs Capacitive Load VS = ±15V 6 1k 10k FREQUENCY (Hz) 1635 G17 Settling Time to 0.1% vs Output Step 8 0 100 100k 1636 G16 10 Vs = ± 2.5V 5 10 50 OUTPUT STEP (V) 25 1 GAIN BANDWIDTH DISTORTION ≤ 1% AV = 1 Vs = ±15V 30 OUTPUT SWING (VP-P) 10k 80 VS = ± 2.5V PHASE MARGIN (DEG) GAIN-BANDWIDTH PRODUCT (kHz) 450 Undistorted Output Swing vs Frequency Output Impedance vs Frequency VS = 3V, 0V VIN = 0.5V TO 2.5V AV = –1 VS = ±1.5V 0.1 AV = –1 VS = 3V, 0V 0.01 VS = 3V, 0V VIN = 0.2V TO 2.2V AV = 1 VS = ±1.5V AV = 1 VS = 3V, 0V 0.001 0.001 100 1k 10k LOAD RESISTANCE TO GROUND (Ω) 100k 1636 G22 0 2 1 OUTPUT VOLTAGE (VP-P) 3 1636 G23 1636fc 9 LT1636 U W TYPICAL PERFOR A CE CHARACTERISTICS CHANGE IN INPUT OFFSET VOLTAGE (100µV/DIV) Open-Loop Gain Large-Signal Response A B A: RL = 2k B: RL = 10k C: RL = 50k B C C Small-Signal Response A 1636 G24 1636 G25 VS = ±15V AV = –1 VS = ±15V AV = 1 1636 G26 U W 0V 10V VS = ±15V –10V OUTPUT VOLTAGE (5V/DIV) U U APPLICATIONS INFORMATION Supply Voltage The positive supply pin of the LT1636 should be bypassed with a small capacitor (about 0.01µF) 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 LT1636 is protected against reverse battery voltages up to 27V. In the event a reverse battery condition occurs, the supply current is less than 1nA. When operating the LT1636 on total supplies of 20V or more, the supply must not be brought up faster than 1µs. This is especially true if low ESR bypass capacitors are used. A series RLC circuit is formed from the supply lead inductance and the bypass capacitor. 5Ω of resistance in the supply or the bypass capacitor will dampen the tuned circuit enough to limit the rise time. Inputs The LT1636 has two input stages, NPN and PNP (see 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 – 4nA. When the input voltage is about 0.5V or less from V +, the NPN input stage is operating and the input bias current is typically 10nA. Increases in temperature will cause the voltage at which operation switches from the PNP stage to the NPN stage to move towards V +. The input offset voltage of the NPN stage is untrimmed and is typically 600µV. A Schottky diode in the collector of each NPN transistor of the NPN input stage allows the LT1636 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 3µA at room temperature. The input offset voltage is typically 600µV when operating above V +. The LT1636 will operate with its input 44V above V – regardless of V +. The inputs are protected against excursions as much as 22V below V – by an internal 1k resistor in series with each input and a diode from the input to the negative supply. There is no output phase reversal for inputs up to 5V below V –. There are no clamping diodes between the inputs and the maximum differential input voltage is 44V. Output The output voltage swing of the LT1636 is affected by input overdrive as shown in the typical performance curves. When monitoring voltages within 100mV of V + , gain should be taken to keep the output from clipping. The output of the LT1636 can be pulled up to 27V beyond V + with less than 1nA of leakage current, provided that V + is less than 0.5V. 1636fc 10 LT1636 U W U U APPLICATIONS INFORMATION The normally reverse biased substrate diode from the output to V – will cause unlimited currents to flow when the output is forced below V –. If the current is transient and limited to 100mA, no damage will occur. returned to ground. The typical performance photo of Open-Loop Gain for various loads shows the details. The LT1636 is internally compensated to drive at least 200pF 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. The LT1636 can be shut down two ways: using the shutdown pin or bringing V + to within 0.5V of V –. When V + is brought to within 0.5V of V – both the supply current and output leakage current drop to less than 1nA. When the shutdown pin is brought 1.2V above V –, the supply current drops to about 4µA and the output leakage current is less than 1µA, independent of V +. In either case the input bias current is less than 0.1nA (even if the inputs are 44V above the negative supply). Distortion There are two main contributors of distortion in op amps: output crossover distortion as the output transitions from sourcing to sinking current and distortion caused by nonlinear common mode rejection. Of course, if the op amp is operating inverting there is no common mode induced distortion. When the LT1636 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 LT1636 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. Gain The open-loop gain is less sensitive to load resistance when the output is sourcing current. This optimizes performance in single supply applications where the load is Shutdown The shutdown pin can be taken up to 32V above V –. The shutdown pin can be driven below V –, however the pin current through the substrate diode should be limited with an external resistor to less than 10mA. Input Offset Nulling The input offset voltage can be nulled by placing a 10k potentiometer between Pins 1 and 8 with its wiper to V – (see Figure 1). The null range will be at least ±1mV. LT1636 8 1 10k V– 1636 F01 Figure 1. Input Offset Nulling 1636fc 11 LT1636 U TYPICAL APPLICATIONS MUX Amplifier Waveforms MUX Amplifier 5V + VIN1 LT1636 SHDN VOUT – 5V + VIN2 LT1636 SHDN – INPUT SELECT VS = 5V VIN1 = 1.2kHz AT 4VP-P, VIN2 = 2.4kHz AT 2VP-P INPUT SELECT = 120Hz AT 5VP-P 1636 TA05 74HC04 Optional Output Compensation for Capacitive Loads Greater Than 200pF VIN + LT1636 CL ≤ 10,000pF – 0.22µF 150Ω 1636 TA09 1636fc 12 LT1636 W W SI PLIFIED SCHEMATIC 7 V+ Q1 Q13 D1 – IN SHDN 2µA Q25 Q23 R3 1k R2 30k 5 Q19 D2 2 Q2 R1 1M D3 Q21 R4 1k + IN Q9 Q10 Q14 Q15 Q18 Q20 Q24 6 OUT Q22 3 Q11 Q12 Q17 Q16 Q26 Q3 Q4 Q5 Q6 Q7 Q8 D4 D5 NULL R5 40k R6 40k R7 300Ω R8 300Ω 1 8 NULL 4 V– 1636 SS 1636fc 13 LT1636 U PACKAGE DESCRIPTION DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1698) R = 0.115 TYP 5 0.38 ± 0.10 8 0.675 ±0.05 3.5 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) 1.65 ± 0.10 (2 SIDES) 3.00 ±0.10 (4 SIDES) PIN 1 TOP MARK PACKAGE OUTLINE (DD8) DFN 0203 0.28 ± 0.05 4 0.28 ± 0.05 0.75 ±0.05 0.200 REF 0.50 BSC 2.38 ±0.05 (2 SIDES) 1 0.50 BSC 2.38 ±0.10 (2 SIDES) 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1) 2. ALL DIMENSIONS ARE IN MILLIMETERS 3. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 4. EXPOSED PAD SHALL BE SOLDER PLATED RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660) 0.889 ± 0.127 (.035 ± .005) 5.23 (.206) MIN 3.2 – 3.45 (.126 – .136) 0.42 ± 0.04 (.0165 ± .0015) TYP 3.00 ± 0.102 (.118 ± .004) (NOTE 3) 0.65 (.0256) BSC 8 7 6 5 0.52 (.206) REF RECOMMENDED SOLDER PAD LAYOUT 0.254 (.010) 3.00 ± 0.102 (.118 ± .004) NOTE 4 4.90 ± 0.15 (1.93 ± .006) DETAIL “A” 0° – 6° TYP GAUGE PLANE 0.53 ± 0.015 (.021 ± .006) DETAIL “A” 1 2 3 4 1.10 (.043) MAX 0.86 (.034) REF 0.18 (.077) SEATING PLANE 0.22 – 0.38 (.009 – .015) TYP 0.65 (.0256) BSC 0.13 ± 0.076 (.005 ± .003) MSOP (MS8) 0802 NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 1636fc 14 LT1636 U PACKAGE DESCRIPTION N8 Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) .400* (10.160) MAX 8 7 6 5 1 2 3 4 .255 ± .015* (6.477 ± 0.381) .300 – .325 (7.620 – 8.255) .065 (1.651) TYP .008 – .015 (0.203 – 0.381) ( +.035 .325 –.015 8.255 +0.889 –0.381 .130 ± .005 (3.302 ± 0.127) .045 – .065 (1.143 – 1.651) ) .120 (3.048) .020 MIN (0.508) MIN .018 ± .003 (0.457 ± 0.076) .100 (2.54) BSC N8 1002 NOTE: 1. DIMENSIONS ARE INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm) S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .189 – .197 (4.801 – 5.004) NOTE 3 .045 ±.005 .050 BSC 8 7 6 5 N N .245 MIN .160 ±.005 1 .030 ±.005 TYP .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) 2 3 N/2 N/2 RECOMMENDED SOLDER PAD LAYOUT .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) .053 – .069 (1.346 – 1.752) 0°– 8° TYP .016 – .050 (0.406 – 1.270) NOTE: 1. DIMENSIONS IN 1 .014 – .019 (0.355 – 0.483) TYP INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) 2 3 4 .004 – .010 (0.101 – 0.254) .050 (1.270) BSC SO8 0502 1636fc 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 LT1636 U TYPICAL APPLICATIONS Self-Buffered Micropower Reference Over-The-Top Comparator with Hysteresis 1M 4V TO 44V 3V TO 44V 10k IN1 (0V TO 44V) + – VOUT LT1636 – VOUT = 1.25V IOUT ≤ 10mA LT1636 + 1M 1N5711 1M 2N5087 10k IN2 (0V TO 44V) 1M 1M 0.1µF 2N5210 V HYSTERESIS = CC 100 1636 TA04 1636 TA03 Lamp Outage Detector Over-The-Top Current Sense 5V TO 44V R1 200Ω 3V 5V TO 44V 1M LAMP ON/OFF LT1634-1.25 100k 5k 5V – 0.5Ω OUT LT1636 RS 0.2Ω + LT1636 + VOUT (0V TO 4.3V) – ILOAD OUT = 0V FOR GOOD BULB 3V FOR OPEN BULB LOAD VOUT ILOAD = (RS)(R2/R1) R2 2k 1636 TA08 1636 TA07 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1078/LT1079 LT2078/LT2079 Dual/Quad 55µA Max, Single Supply, Precision Op Amps Input/Output Common Mode Includes Ground, 70µV VOS(MAX) and 2.5µV/°C Drift (Max), 200kHz GBW, 0.07V/µs Slew Rate LT1178/LT1179 LT2178/LT2179 Dual/Quad 17µA Max, Single Supply, Precison Op Amps Input/Output Common Mode Includes Ground, 70µV VOS(MAX) and 4µV/°C Drift (Max), 85kHz GBW, 0.04V/µs Slew Rate LT1366/LT1367 Dual/Quad Precision, Rail-to-Rail Input and Output Op Amps 475µV VOS(MAX), 500V/mV AVOL(MIN), 400kHz 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 LT1637 Single Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp 1.1MHz, VCM Extends 44V above VEE, Independent of VCC; MSOP Package, Shutdown Function LT1638/LT1639 Dual/Quad 1.2MHz Over-The-Top Micropower, Rail-to-Rail Input and Output Op Amps 0.4V/µs Slew Rate, 230µA Supply Current per Amplifier LT1782 Micropower, Over-The-Top, SOT-23, Rail-to-Rail Input and Output Op Amp SOT-23, 800µV VOS(MAX), IS = 55µA (Max), Gain-Bandwidth = 200kHz, Shutdown Pin LT1783 1.2MHz, Over-The-Top, Micropower, Rail-to-Rail Input and Output Op Amp SOT-23, 800µV VOS(MAX), IS = 300µA (Max), Gain-Bandwidth = 1.2MHz, Shutdown Pin 1636fc 16 Linear Technology Corporation LT/LT 0505 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 1998