LT1636CS8

LT1636 Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp 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 APPLICATIO S ■ ■ ■ ■ ■ Battery- or Solar-Powered Systems Portable Instrumentation Sensor Conditioning Supply Current Sensing Battery Monitoring MUX Amplifiers 4mA to 20mA Transmitters 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). 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. TYPICAL APPLICATIO Input Bias Current vs Common Mode Voltage Over-The-Top Current Source with Shutdown INPUT BIAS CURRENT (nA) 5000 3000 VS = 5V, 0V 4V TO 44V R* LT1004-1.2 1M R 1000 40 30 20 10 0 –10 4.0 4.4 4.8 5.2 10 20 30 40 50 COMMON MODE VOLTAGE (V) 1636 G03 + LT1636 TPO610 IOUT = 1.2 R e.g., 10mA = 120Ω 1636 TA01 TA = – 55°C TA = 125°C TA = 25°C – IOUT SHDN *OPTIONAL FOR LOW OUTPUT CURRENTS U 1636fc U U 1 LT1636 ABSOLUTE MAXIMUM RATINGS Total Supply Voltage (V + 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 PACKAGE/ORDER I FOR ATIO TOP VIEW NULL 1 –IN 2 +IN 3 V– 4 8 7 6 5 NULL V + OUT SHDN NULL –IN +IN V– 1 2 3 4 DD PACKAGE 8-LEAD (3mm × 3mm) PLASTIC DFN TJMAX = 125°C, θJA = 160°C/W (NOTE 2) UNDERSIDE METAL CONNECTED TO V – MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 150°C, θJA = 250°C/W ORDER PART NUMBER LT1636CDD LT1636IDD DD PART* MARKING LAAJ ORDER PART NUMBER LT1636CMS8 LT1636IMS8 *The temperature grades are identified by a label on the shipping container. Consult factory for parts specified with wider operating temperature ranges. 3V A D 5V ELECTRICAL CHARACTERISTICS 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 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) 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 U U W WW U W (Note 1) 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 TOP VIEW TOP VIEW 8 7 6 5 NULL V+ OUT SHDN NULL 1 –IN 2 +IN 3 V– 4 N8 PACKAGE 8-LEAD PDIP 8 7 6 5 NULL V+ OUT SHDN S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 150°C/W (N8) TJMAX = 150°C, θJA = 190°C/W (S8) MS8 PART* MARKING LTCL ORDER PART NUMBER LT1636CN8 LT1636CS8 LT1636IN8 LT1636IS8 LT1636HS8 S8 PART* MARKING 1636 1636I 1636H U ● ● ● ● ● ● LT1636 3V A D 5V ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER 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) 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 VCM = 44V (Note 5) 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 IOS IB en in RIN CIN CMRR AVOL VOL VOH ISC PSRR IS ISD tON tOFF U ● ● ● ● ● ● ● ● ● ● Input Offset Voltage Drift (Note 9) Input Offset Current Input Bias Current VCM = 44V (Note 5) V S = 0V 0.1Hz to 10Hz f = 1kHz f = 1kHz Differential Common Mode, VCM = 0V to 44V 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 ● Output Voltage Swing LOW Output Voltage Swing HIGH Short-Circuit Current (Note 2) Power Supply Rejection Ratio Reverse Supply Voltage Supply Current Supply Current, SHDN Shutdown Pin Current Output Leakage Current, SHDN Maximum Shutdown Pin Current Turn-On Time Turn-Off Time 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 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● 3 LT1636 3V A D 5V ELECTRICAL CHARACTERISTICS SYMBOL GBW 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 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) 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 SR 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) 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 DD Package 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C Input Offset Voltage Drift (Note 9) 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 ● ● ±15V ELECTRICAL CHARACTERISTICS IOS IB en in RIN CIN CMRR AVOL VOL VOH 4 U ● ● ● ● LT1636C/LT1636I MIN TYP MAX 100 450 550 700 450 750 900 450 850 1200 650 1050 1200 4 8 10 10 1.0 10 UNITS µV µV µV µV µV µV µV µV µV µV µV µV µV/°C µV/°C µV/°C µV/°C nA nA µVP-P nV/√Hz pA/√Hz MΩ MΩ pF 100 ● ● 100 ● ● 125 ● ● ● ● ● ● ● ● 1 2 2 2 0.2 4 1 52 0.035 5.2 13 12000 4 Input Offset Current 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 Large-Signal Voltage Gain VCM = – 15V to 29V VO = ± 14V, RL = 10k 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C No Load ISINK = 5mA ISINK = 10mA No Load ISOURCE = 5mA ISOURCE = 10mA 0.1Hz to 10Hz f = 1kHz f = 1kHz Differential Common Mode, VCM = – 15V to 14V ● ● ● ● ● ● ● ● ● ● – 15 86 100 75 50 103 500 29 V dB V/mV V/mV V/mV Output Voltage Swing LOW – 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 1636fc Output Voltage Swing HIGH LT1636 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 ISC PARAMETER Short-Circuit Current (Note 2) CONDITIONS Short to GND 0°C ≤ TA ≤ 70°C – 40°C ≤ TA ≤ 85°C VS = ± 1.35V to ± 22V ● ● ● ● ±15V ELECTRICAL CHARACTERISTICS LT1636C/LT1636I MIN TYP MAX ± 18 ± 15 ± 10 90 ± 30 UNITS mA mA mA dB PSRR IS Power Supply Rejection Ratio Supply Current Positive Supply Current, SHDN 114 50 70 85 30 15 8 150 2 µA µA µA nA µA µA µA kHz kHz kHz V/µs V/µs V/µs VPIN5 = – 20V, VS = ± 22V, No Load VPIN5 = – 21.7V, VS = ± 22V, No Load VPIN5 = – 20V, VS = ± 22V, No Load VPIN5 = 32V, VS = ± 22V VPIN5 = – 20V, VS = ± 22V, No Load 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 ● ● ● ● ● ● ● ● ● 12 0.7 1.2 27 0.1 125 110 100 0.0375 0.033 0.030 220 ISHDN Shutdown Pin Current Maximum Shutdown Pin Current Output Leakage Current, SHDN GBW Gain Bandwidth Product SR Slew Rate 0.075 3V A D 5V ELECTRICAL CHARACTERISTICS SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS 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) MIN ● IOS IB CMRR AVOL VOL VOH PSRR U LT1636H TYP 50 MAX 325 3 10 3 1 30 10 UNITS µV mV µV/°C nA µA nA µA V dB dB Input Offset Voltage Drift (Note 9) Input Offset Current VCM = 44V (Note 5) Input Bias Current VCM = 44V (Note 5) Input Voltage Range Common Mode Rejection Ratio (Note 5) Large-Signal Voltage Gain VCM = 0.3V to VCC – 1V VCM = 0.3V to 44V VS = 3V, VO = 500mV to 2.5V, RL = 10k VS = 5V, VO = 500mV to 4.5V, RL = 10k Output Voltage Swing LOW Output Voltage Swing HIGH No Load ISINK = 2.5mA VS = 3V, No Load VS = 3V, ISOURCE = 5mA VS = 5V, No Load VS = 5V, ISOURCE = 10mA Power Supply Rejection Ratio Minimum Supply Voltage VS = 2.7V to 12.5V, VCM = VO = 1V ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● 3 0.3 72 74 200 20 400 35 1300 2000 44 V/mV V/mV V/mV V/mV 15 875 mV mV V V V V dB V 1636fc 2.925 2.35 4.925 4.10 80 2.7 5 LT1636 3V A D 5V ELECTRICAL CHARACTERISTICS SYMBOL IS PARAMETER Reverse Supply Voltage Supply Current Supply Current, SHDN ISD Shutdown Pin Current Output Leakage Current, SHDN Maximum Shutdown Pin Current GBW SR Gain Bandwidth Product Slew Rate CONDITIONS IS = – 100µA (Note 6) 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) MIN ● ● 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 VOS PARAMETER Input Offset Voltage ● ±15V ELECTRICAL CHARACTERISTICS IOS IB CMRR AVOL VO PSRR IS ISHDN VL VH GBW SR 6 U LT1636H TYP 42 MAX 55 75 15 200 7 5 200 UNITS V µA µA µA nA µA µA µA kHz kHz V/µs V/µs 25 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) f = 1kHz (Note 5) ● ● ● ● ● ● 110 60 0.035 0.015 200 0.07 AV = – 1, RL = ∞ (Note 7) ● CONDITIONS MIN LT1636H TYP 100 MAX 550 3.4 11 5 50 UNITS µV mV µV/°C nA nA dB V/mV V/mV Input Offset Voltage Drift (Note 9) Input Offset Current Input Bias Current Common Mode Rejection Ratio Large-Signal Voltage Gain Output Voltage Swing Power Supply Rejection Ratio Minimum Supply Voltage Supply Current VCM = – 14.7V to 29V VO = ± 14V, RL = 10k ● ● ● ● ● 3 72 100 4 500 ± 14.8 ± 14.3 84 ± 1.35 50 70 100 40 200 10 200 100 –21.7 –20 125 75 0.0375 0.02 220 0.075 No Load IOUT = ± 2.5mA VS = ± 1.35V to ± 22V ● ● ● ● ● V V dB V µA µA µA nA µA µA µA V V kHz kHz V/µs V/µs 1636fc Positive Supply Current, SHDN Shutdown Pin Current Maximum Shutdown Pin Current Output Leakage Current, SHDN Shutdown Pin Input Low Voltage Shutdown Pin Input High Voltage Gain Bandwidth Product Slew Rate VPIN5 = – 20V, VS = ± 22V, No Load VPIN5 = – 21.7V, VS = ± 22V, No Load VPIN5 = – 20V, VS = ± 22V, No Load VPIN5 = 32V, VS = ± 22V VPIN5 = – 20V, VS = ± 22V, No Load VS = ± 22V VS = ± 22V f = 1kHz ● ● ● ● ● ● ● ● AV = – 1, RL = ∞, VO = ± 10V Measured at VO = ± 5V ● LT1636 ELECTRICAL CHARACTERISTICS 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 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. TYPICAL PERFOR A CE CHARACTERISTICS Supply Current vs Supply Voltage 80 CHANGE IN INPUT OFFSET VOLTAGE (µV) 70 SUPPLY CURRENT (µA) 60 50 40 30 20 10 0 0 5 10 15 20 25 30 35 40 TOTAL SUPPLY VOLTAGE (V) 45 TA = 25°C TA = 125°C 100 0 –100 TA = 125°C –200 –300 0 1 2 3 4 TOTAL SUPPLY VOLTAGE (V) 5 1636 G02 INPUT BIAS CURRENT (nA) TA = – 55°C Output Saturation Voltage vs Load Current (Output High) 1 10 OUTPUT SATURATION VOLTAGE (mV) OUTPUT SATURATION VOLTAGE (V) OUTPUT SATURATION VOLTAGE (V) VS = 5V VOD = 30mV 0.1 TA = 125°C TA = 25°C TA = – 55°C 0.01 0.1 1 10 0.0001 0.001 0.01 SOURCING LOAD CURRENT (mA) UW 1636 G01 Minimum Supply Voltage 300 200 1000 5000 3000 Input Bias Current vs Common Mode Voltage VS = 5V, 0V 40 30 20 10 0 –10 4.0 4.4 4.8 5.2 10 20 30 40 50 COMMON MODE VOLTAGE (V) 1636 G03 TA = – 55°C TA = 125°C TA = 25°C TA = – 55°C TA = 25°C Output Saturation Voltage vs Load Current (Output Low) 100 VS = 5V VOD = 30mV 1 Output Saturation Voltage vs Input Overdrive 90 80 70 60 50 40 30 20 10 0 100 1636 G05 VS = ± 2.5V NO LOAD 0.1 TA = 125°C TA = 25°C 0.01 TA = – 55°C OUTPUT HIGH OUTPUT LOW 0 10 20 30 40 50 60 70 80 90 100 INPUT OVERDRIVE (mV) 1636 G06 100 1636 G04 0.001 0.1 1 10 0.0001 0.001 0.01 SINKING LOAD CURRENT (mA) 1636fc 7 LT1636 TYPICAL PERFOR A CE CHARACTERISTICS 0.1Hz to 10Hz Noise Voltage INPUT NOISE VOLTAGE DENSITY (nV/√Hz) VS = ± 2.5V INPUT NOISE CURRENT DENSITY (pA/√Hz) 1 10 100 FREQUENCY (Hz) 1000 1636 G08 NOISE VOLTAGE (400nV/DIV) 0 1 2 3 456 TIME (SEC) 7 Open-Loop Gain and Phase Shift vs Frequency 70 60 50 40 PHASE VS = ± 2.5V 100 GAIN-BANDWIDTH PRODUCT (kHz) 220 200 SLEW RATE (V/µs) GAIN (dB) 30 20 10 0 –10 –20 –30 1k 10k 100k FREQUENCY (Hz) 1M 1636 G10 GAIN Gain-Bandwidth Product and Phase Margin vs Supply Voltage 300 GAIN-BANDWIDTH PRODUCT (kHz) COMMON MODE REJECTION RATIO (dB) POWER SUPPLY REJECTION RATIO (dB) 280 260 240 RL = 10k f = 1kHz PHASE MARGIN GAIN BANDWIDTH 220 200 180 0 5 10 15 20 25 30 35 40 TOTAL SUPPLY VOLTAGE (V) 45 20 30 8 UW 8 9 1636 G07 Noise Voltage Density vs Frequency 80 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 Input Noise Current vs Frequency 70 60 50 40 30 10 1 10 100 FREQUENCY (Hz) 1000 1635 G09 Gain-Bandwidth Product vs Temperature 260 f = 1kHZ 240 VS = ±15V 0.11 0.10 0.09 0.08 0.07 0.06 160 140 – 50 –25 0.05 50 25 75 0 TEMPERATURE (°C) 100 125 0.12 80 60 40 20 0 –20 – 40 – 60 – 80 –100 Slew Rate vs Temperature RISING, VS = ± 1.5V RISING, VS = ± 15V PHASE SHIFT (DEG) PHASE MARGIN (DEG) FALLING, VS = ± 15V VS = ±1.5V 180 FALLING, VS = ± 1.5V 0.04 – 50 – 25 0 50 75 25 TEMPERATURE (°C) 100 125 1636 G11 1636 G12 CMRR vs Frequency 50 120 110 100 90 80 70 60 50 40 30 20 1K 10K FREQUENCY (Hz) 100K 1636 G14 PSRR vs Frequency 80 70 60 50 40 30 20 10 0 –10 – 20 1k 10k FREQUENCY (Hz) 100k 1636 G15 VS = ± 2.5V POSITIVE SUPPLY 40 VS = ±15V VS = ±1.5V NEGATIVE SUPPLY 1636 G13 1636fc LT1636 TYPICAL PERFOR A CE CHARACTERISTICS Gain-Bandwidth Product and Phase Margin vs Load Resistance 450 GAIN-BANDWIDTH PRODUCT (kHz) VS = ± 2.5V 400 350 300 250 200 150 GAIN BANDWIDTH 100 50 1k 10k LOAD RESISTANCE (Ω) PHASE MARGIN OUTPUT IMPEDANCE (Ω) OUTPUT SWING (VP-P) Settling Time to 0.1% vs Output Step 10 8 6 OUTPUT STEP (V) VS = ± 15V AV = 1 AV = – 1 OVERSHOOT (%) 2 0 –2 –4 –6 –8 –10 0 20 40 60 80 100 120 140 160 SETTLING TIME (µs) 1636 G19 60 50 40 30 20 10 0 10 THD + NOISE (%) 4 AV = – 1 AV = 1 Total Harmonic Distortion + Noise vs Load Resistance 10 1 THD + NOISE (%) THD + NOISE (%) 0.1 VS = 3V, 0V VIN = 0.5V TO 2.5V 0.01 0.001 100 1k 10k LOAD RESISTANCE TO GROUND (Ω) 100k UW 1636 G16 Output Impedance vs Frequency 80 70 1k 60 50 40 30 20 10 PHASE MARGIN (DEG) Undistorted Output Swing vs Frequency 35 30 Vs = ± 15V DISTORTION ≤ 1% AV = 1 10k VS = ± 2.5V AV = 100 AV = 10 AV = 1 25 20 15 10 5 Vs = ± 2.5V 100 10 1 0 100k 0.1 100 1k 10k FREQUENCY (Hz) 100k 1635 G17 0 100 1k 10k FREQUENCY (Hz) 100k 1635 G18 Capacitive Load Handling, Overshoot vs Capacitive Load 100 90 80 70 VS = ±2.5V ISOURCE = 40µA NO OUTPUT COMPENSATION AV = 1 AV = 2 10 Total Harmonic Distortion + Noise vs Frequency VS = 3V, 0V VOUT = 2VP-P VCM = 1.2V RL = 50k 1 0.1 AV = 5 AV = 10 0.01 AV = – 1 AV = 1 100 1000 CAPACITIVE LOAD (pF) 10000 1636 G20 0.001 10 100 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 VS = ±1.5V VIN = ±1V 1 AV = –1 VS = ±1.5V 0.1 AV = –1 VS = 3V, 0V AV = 1 VS = 3V, 0V 0.001 0 2 1 OUTPUT VOLTAGE (VP-P) 3 1636 G23 AV = 1 VS = ±1.5V VS = 3V, 0V VIN = 0.2V TO 2.2V 0.01 1636 G22 1636fc 9 LT1636 TYPICAL PERFOR A CE CHARACTERISTICS Open-Loop Gain CHANGE IN INPUT OFFSET VOLTAGE (100µV/DIV) B C A A B C 0V 10V VS = ±15V –10V OUTPUT VOLTAGE (5V/DIV) 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 U W UW 1636 G24 Large-Signal Response Small-Signal Response A: RL = 2k B: RL = 10k C: RL = 50k VS = ±15V AV = – 1 1636 G25 VS = ±15V AV = 1 1636 G26 U U LT1636 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. 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. 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 returned to ground. The typical performance photo of Open-Loop Gain for various loads shows the details. Shutdown 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). 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. U W U U LT1636 8 1 10k V– 1636 F01 Figure 1. Input Offset Nulling 1636fc 11 LT1636 TYPICAL APPLICATIONS MUX Amplifier 5V VIN1 + – LT1636 SHDN VOUT 5V VIN2 + – LT1636 SHDN INPUT SELECT 74HC04 12 U MUX Amplifier Waveforms VS = 5V VIN1 = 1.2kHz AT 4VP-P, VIN2 = 2.4kHz AT 2VP-P INPUT SELECT = 120Hz AT 5VP-P 1636 TA05 Optional Output Compensation for Capacitive Loads Greater Than 200pF VIN + LT1636 – 0.22µF 150Ω 1636 TA09 CL ≤ 10,000pF 1636fc LT1636 SI PLIFIED SCHEMATIC 7 V+ Q1 D1 R2 30k SHDN 5 R1 1M Q3 Q4 R5 40k Q5 Q6 Q7 Q8 D4 D5 NULL 1 R7 300Ω R8 300Ω 1636 SS – IN Q2 + IN 2µA W W Q13 D2 Q19 Q25 Q23 D3 Q21 Q24 6 OUT R3 1k 2 R4 1k 3 Q11 Q12 Q16 Q17 Q9 Q10 Q14 Q15 Q18 Q20 Q22 Q26 R6 40k 8 NULL 4 V– 1636fc 13 LT1636 PACKAGE DESCRIPTION DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1698) R = 0.115 TYP 5 0.675 ± 0.05 0.38 ± 0.10 8 3.5 ± 0.05 1.65 ± 0.05 2.15 ± 0.05 (2 SIDES) PACKAGE OUTLINE 0.28 ± 0.05 0.50 BSC 2.38 ± 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS PIN 1 TOP MARK 5.23 (.206) MIN 0.42 ± 0.04 (.0165 ± .0015) TYP RECOMMENDED SOLDER PAD LAYOUT DETAIL “A” 0° – 6° TYP 4.90 ± 0.15 (1.93 ± .006) 0.254 (.010) GAUGE PLANE 0.18 (.077) SEATING PLANE 0.22 – 0.38 (.009 – .015) TYP 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 U 3.00 ± 0.10 (4 SIDES) 1.65 ± 0.10 (2 SIDES) (DD8) DFN 0203 0.200 REF 0.75 ± 0.05 4 0.28 ± 0.05 2.38 ± 0.10 (2 SIDES) 1 0.50 BSC 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 MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660) 0.889 ± 0.127 (.035 ± .005) 3.2 – 3.45 (.126 – .136) 0.65 (.0256) BSC 3.00 ± 0.102 (.118 ± .004) (NOTE 3) 8 7 65 0.52 (.206) REF 3.00 ± 0.102 (.118 ± .004) NOTE 4 0.53 ± 0.015 (.021 ± .006) DETAIL “A” 1 23 4 1.10 (.043) MAX 0.86 (.034) REF 0.65 (.0256) BSC LT1636 PACKAGE DESCRIPTION N8 Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) .400* (10.160) MAX 8 7 6 5 .300 – .325 (7.620 – 8.255) .008 – .015 (0.203 – 0.381) ( +.035 .325 –.015 8.255 +0.889 –0.381 ) INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm) NOTE: 1. DIMENSIONS ARE .050 BSC 8 N N .245 MIN .160 ±.005 .228 – .244 (5.791 – 6.197) 1 2 3 N/2 .030 ±.005 TYP RECOMMENDED SOLDER PAD LAYOUT .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 0°– 8° TYP NOTE: 1. DIMENSIONS IN 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) 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. U .255 ± .015* (6.477 ± 0.381) 1 2 3 4 .130 ± .005 (3.302 ± 0.127) .045 – .065 (1.143 – 1.651) .065 (1.651) TYP .120 (3.048) .020 MIN (0.508) MIN .018 ± .003 (0.457 ± 0.076) N8 1002 .100 (2.54) BSC S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .189 – .197 (4.801 – 5.004) NOTE 3 7 6 5 .045 ±.005 .150 – .157 (3.810 – 3.988) NOTE 3 N/2 1 2 3 4 .053 – .069 (1.346 – 1.752) .004 – .010 (0.101 – 0.254) .016 – .050 (0.406 – 1.270) .014 – .019 (0.355 – 0.483) TYP .050 (1.270) BSC SO8 0502 1636fc 15 LT1636 TYPICAL APPLICATIONS Over-The-Top Comparator with Hysteresis 1M 3V TO 44V IN1 (0V TO 44V) 10k 4V TO 44V + LT1636 VOUT 1M 2N5087 1M 0.1µF – IN2 (0V TO 44V) 10k 1M 2N5210 V HYSTERESIS = CC 100 Lamp Outage Detector 5V TO 44V 1M LAMP ON/OFF 100k 5k 0.5Ω 3V – LT1636 OUT + ILOAD OUT = 0V FOR GOOD BULB 3V FOR OPEN BULB 1636 TA07 RELATED PARTS PART NUMBER LT1078/LT1079 LT2078/LT2079 LT1178/LT1179 LT2178/LT2179 LT1366/LT1367 LT1490/LT1491 LT1637 LT1638/LT1639 LT1782 LT1783 DESCRIPTION Dual/Quad 55µA Max, Single Supply, Precision Op Amps Dual/Quad 17µA Max, Single Supply, Precison Op Amps Dual/Quad Precision, Rail-to-Rail Input and Output Op Amps Dual/Quad Over-The-Top Micropower, Rail-to-Rail Input and Output Op Amps Single Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp Dual/Quad 1.2MHz Over-The-Top Micropower, Rail-to-Rail Input and Output Op Amps Micropower, Over-The-Top, SOT-23, Rail-to-Rail Input and Output Op Amp 1.2MHz, Over-The-Top, Micropower, Rail-to-Rail Input and Output Op Amp 16 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● U Self-Buffered Micropower Reference – LT1636 + 1M LT1634-1.25 VOUT = 1.25V IOUT ≤ 10mA 1N5711 1636 TA04 1636 TA03 Over-The-Top Current Sense 5V TO 44V R1 200Ω 5V RS 0.2Ω + LT1636 – LOAD VOUT ILOAD = (RS)(R2/R1) R2 2k VOUT (0V TO 4.3V) 1636 TA08 COMMENTS Input/Output Common Mode Includes Ground, 70µV VOS(MAX) and 2.5µV/°C Drift (Max), 200kHz GBW, 0.07V/µs Slew Rate Input/Output Common Mode Includes Ground, 70µV VOS(MAX) and 4µV/°C Drift (Max), 85kHz GBW, 0.04V/µs Slew Rate 475µV VOS(MAX), 500V/mV AVOL(MIN), 400kHz GBW Single Supply Input Range: – 0.4V to 44V, Micropower 50µA per Amplifier, Rail-to-Rail Input and Output, 200kHz GBW 1.1MHz, VCM Extends 44V above VEE, Independent of VCC; MSOP Package, Shutdown Function 0.4V/µs Slew Rate, 230µA Supply Current per Amplifier SOT-23, 800µV VOS(MAX), IS = 55µA (Max), Gain-Bandwidth = 200kHz, Shutdown Pin SOT-23, 800µV VOS(MAX), IS = 300µA (Max), Gain-Bandwidth = 1.2MHz, Shutdown Pin 1636fc LT/LT 0505 REV C • PRINTED IN USA www.linear.com © LINEAR TECHNOLOGY CORPORATION 1998