LT1490AIDD#PBF

LT1490A/LT1491A Dual/Quad Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps DESCRIPTION FEATURES n n n n n n n n n n n n n n n Low Input Offset Voltage: 500μV Max Output Swings to 10mV Max from V– Rail-to-Rail Input and Output Micropower: 50μA/Amplifier Max Over-The-Top® Input Common Mode Range Extends 44V Above V–, Independent of V+ Specified on 3V, 5V and ±15V Supplies High Output Current: 20mA Output Drives 10,000pF with Output Compensation Reverse Battery Protection to 18V No Supply Sequencing Problems High Voltage Gain: 1500V/mV High CMRR: 98dB No Phase Reversal Gain Bandwidth Product: 200kHz Tiny 3mm × 3mm × 0.8mm DFN Package APPLICATIONS n n n n n Battery- or Solar-Powered Systems Portable Instrumentation Sensor Conditioning Supply Current Sensing Battery Monitoring Micropower Active Filters 4mA to 20mA Transmitters The LT1490A/LT1491A have 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. Built-in resistors protect the inputs for faults below the negative supply up to 15V. There is no phase reversal of the output for inputs 15V below V– or 44V above V–, independent of V+. The LT1490A dual op amp is available in the 8-pin MSOP, PDIP and SO packages. For space limited applications LT1490A is available in a 3mm × 3mm × 0.8mm, dual fine pitch leadless package (DFN). The quad LT1491A is available in the 14-pin SO, PDIP and 5mm × 3mm × 0.8mm DFN packages. L, LT, LTC, LTM, Over-The-Top, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5825228. TYPICAL APPLICATION CHARGER VOLTAGE The LT®1490A/LT1491A are dual and quad op amps with a low input offset voltage of 500μV max. The LT1490A/LT1491A operate on all single and split supplies with a total voltage of 2V to 44V, drawing only 40μA of quiescent current per amplifier. These amplifiers are reverse supply protected; they draw virtually no current for reverse supply up to 18V. The input range of the LT1490A/LT1491A includes both supplies and the output swings to both supplies. Unlike most micropower op amps, the LT1490A/LT1491A can drive heavy loads; their rail-to-rail outputs drive 20mA. The LT1490A/LT1491A are unity-gain stable and drive all capacitive loads up to 10,000pF when optional 0.22μF and 150Ω compensation is used. Battery Monitor RS 0.2Ω RA 2k IBATT RA´ 2k + Q1 2N3904 1/4 LT1491A – – 1/4 LT1491A LOGIC + RB 2k R B´ 2k LOAD + Q2 2N3904 LOGIC HIGH (5V) = CHARGING LOGIC LOW (0V) = DISCHARGING 1/4 LT1491A – + + RG 10k VBATT = 12V S1 1/4 LT1491A VOUT – 10k 90.9k S1 = OPEN, GAIN = 1 S1 = CLOSED, GAIN = 10 RA = RB VS = 5V, 0V 1490A TA01 IBATT = VOUT V = OUT AMPS (RS)(RG /RA)(GAIN) GAIN 14901afd 1 LT1490A/LT1491A ABSOLUTE MAXIMUM RATINGS (Note 1) Total Supply Voltage (V+ to V–) ............................... 44V Differential Input Voltage ......................................... 44V Input Current (Note 9) ......................................... ±12mA Output Short-Circuit Duration (Note 2) ........ Continuous Operating Temperature Range (Note 3) LT1490AC/LT1491AC ...........................–40°C to 85°C LT1490AI/LT1491AI .............................–40°C to 85°C LT1490AH/LT1491AH......................... –40°C to 125°C Specified Temperature Range (Note 4) LT1490AC/LT1490AI ............................–40°C to 85°C LT1491AC/LT1491AI.............................–40°C to 85°C LT1490AH/LT1491AH......................... –40°C to 125°C Junction Temperature .......................................... 150°C Junction Temperature (DD/DHC Package) ........... 125°C Storage Temperature Range ................. –65°C to 150°C Storage Temperature Range DD/DHC Package .............................. –65°C to 125°C Lead Temperature (Soldering, 10 sec).................. 300°C PIN CONFIGURATION LT1490A LT1490A LT1490A TOP VIEW TOP VIEW TOP VIEW OUT A –IN A +IN A V– 1 2 3 4 A B 8 7 6 5 V+ OUT B –IN B +IN B OUT A 1 –IN A 2 +IN A 3 V– MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 150°C, θJA = 250°C/W 8 V+ 7 OUT B –IN A 2 6 –IN B +IN A 3 +IN B V– 4 A B 4 5 OUT A 1 N8 PACKAGE S8 PACKAGE 8-LEAD PDIP 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 130°C/W (N8) TJMAX = 150°C, θJA = 190°C/W (S8) LT1491A A B 8 V+ 7 OUT B 6 –IN B 5 +IN B DD PACKAGE 8-LEAD (3mm w 3mm) PLASTIC DFN TJMAX = 125°C, θJA = 160°C/W (NOTE 2) UNDERSIDE METAL CONNECTED TO V– LT1491A TOP VIEW TOP VIEW 14 OUT D OUT A 1 –IN A 2 +IN A 3 A D V+ 4 +IN B 5 –IN B 6 OUT B 7 13 –IN D 12 +IN D 11 V – B C 10 +IN C 9 –IN C 8 OUT C N PACKAGE S PACKAGE 14-LEAD PDIP 14-LEAD PLASTIC SO TJMAX = 150°C, θJA = 110°C/W (N) TJMAX = 150°C, θJA = 150°C/W (S) OUT A 1 –IN A 2 +IN A 3 16 OUT D A D 15 –IN D 14 +IN D V+ 4 +IN B 5 13 V– –IN B 6 OUT B 7 10 OUT C NC 8 9 B C 12 +IN C 11 –IN C NC DHC16 PACKAGE 16-LEAD (5mm w 3mm) PLASTIC DFN TJMAX = 125°C, θJA = 160°C/W (NOTE 2) UNDERSIDE METAL CONNECTED TO V– 14901afd 2 LT1490A/LT1491A ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LT1490ACMS8#PBF LT1490ACMS8#TRPBF LTNG 8-Lead Plastic MSOP 0°C to 70°C LT1490AIMS8#PBF LT1490AIMS8#TRPBF LTPU 8-Lead Plastic MSOP –40°C to 85°C LT1490AHMS8#PBF LT1490AHMS8#TRPBF LTRK 8-Lead Plastic MSOP –40°C to 125°C LT1490ACS8#PBF LT1490ACS8#TRPBF 1490A 8-Lead Plastic SO 0°C to 70°C LT1490AIS8#PBF LT1490AIS8#TRPBF 1490AI 8-Lead Plastic SO –40°C to 85°C LT1490AHS8#PBF LT1490AHS8#TRPBF 1490AH 8-Lead Plastic SO –40°C to 125°C LT1490ACN8#PBF LT1490ACN8#TRPBF LT1490ACN8 8-Lead PDIP 0°C to 70°C LT1490AIN8#PBF LT1490AIN8#TRPBF LT1490AIN8 8-Lead PDIP –40°C to 85°C LT1490ACDD#PBF LT1490ACDD#TRPBF LAAH 8-Lead (3mm × 3mm) Plastic DFN 0°C to 70°C LT1490AIDD#PBF LT1490AIDD#TRPBF LAAH 8-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C LT1491ACS#PBF LT1491ACS#TRPBF LT1491ACS 14-Lead Plastic SO 0°C to 70°C LT1491AIS#PBF LT1491AIS#TRPBF LT1491AIS 14-Lead Plastic SO –40°C to 85°C LT1491AHS#PBF LT1491AHS#TRPBF LT1491AHS 14-Lead Plastic SO –40°C to 125°C LT1491ACN#PBF LT1491ACN#TRPBF LT1491ACN 14-Lead PDIP 0°C to 70°C LT1491AIN#PBF LT1491AIN#TRPBF LT1491AIN 14-Lead PDIP –40°C to 85°C LT1491ACDHC#PBF LT1491ACDHC#TRPBF 1491A 16-Lead (5mm × 3mm) Plastic DFN 0°C to 70°C LT1491AIDHC#PBF LT1491AIDHC#TRPBF 1491A 16-Lead (5mm × 3mm) Plastic DFN –40°C to 85°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ 14901afd 3 LT1490A/LT1491A ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range of – 40°C ≤ TA ≤ 85°C, otherwise specifications are at TA = 25°C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise noted. (Note 4) LT1490AC/LT1491AC LT1490AI/LT1491AI MIN TYP MAX SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage (Note 5) LT1490A N, S Packages 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C l l LT1490A MS8 Package, LT1491A N, S Packages 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C l l LT1490A DD, LT1491A DHC 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C l l –40°C ≤ TA ≤ 85°C LT1490A DD, LT1491A DHC, –40°C ≤ TA ≤ 85°C VCM = 44V (Note 6) Input Offset Voltage Drift (Note 9) IOS IB Input Offset Current Input Bias Current VCM = 44V (Note 6) VS = 0V UNITS 110 500 700 800 μV μV μV 220 1000 1200 1400 μV μV μV 250 1200 1400 1600 μV μV μV l l 2 2 4 6 l l 0.2 0.8 0.8 nA μA l l 1 3 0.3 8 10 nA μA nA l 2 pA/°C 1 μVP-P μV/°C μV/°C Input Bias Current Drift –40°C ≤ TA ≤ 85°C Input Noise Voltage 0.1Hz to 10Hz en Input Noise Voltage Density f = 1kHz 50 nV/√Hz in Input Noise Current Density f = 1kHz 0.015 pA/√Hz RIN Input Resistance Differential Common Mode, VCM = 0V to 44V CIN Input Capacitance 6 4 17 11 MΩ MΩ 4.6 pF l 0 CMRR Common Mode Rejection Ratio (Note 6) VCM = 0V to VCC – 1V VCM = 0V to 44V l l 84 80 98 98 AVOL Large-Signal Voltage Gain VS = 3V, VO = 500mV to 2.5V, RL = 10k 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C l l 200 133 100 1500 V/mV V/mV V/mV VS = 5V, VO = 500mV to 4.5V, RL = 10k 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C l l 400 250 200 1500 V/mV V/mV V/mV VS = 3V, No Load VS = 3V, ISINK = 5mA l l 3 250 10 450 mV mV VS = 5V, No Load VS = 5V, ISINK = 5mA VS = 5V, ISINK = 10mA l l 3 250 330 10 500 500 mV mV mV VS = 3V, No Load VS = 3V, ISOURCE = 5mA l l 2.95 2.55 2.978 2.6 V V VS = 5V, No Load VS = 5V, ISOURCE = 10mA l l 4.95 4.30 4.978 4.6 V V Input Voltage Range VOL VOH ISC Output Voltage Swing Low Output Voltage Swing High Short-Circuit Current (Note 2) 44 V dB dB VS = 3V, Short to GND VS = 3V, Short to VCC 10 10 15 30 mA mA VS = 5V, Short to GND VS = 5V, Short to VCC 15 15 25 30 mA mA 14901afd 4 LT1490A/LT1491A ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range of – 40°C ≤ TA ≤ 85°C, otherwise specifications are at TA = 25°C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise noted. (Note 4) SYMBOL PARAMETER CONDITIONS PSRR Power Supply Rejection Ratio VS = 2.5V to 12.5V, VCM = VO = 1V l 84 98 18 27 l Minimum Operating Supply Voltage Reverse Supply Voltage LT1490AC/LT1491AC LT1490AI/LT1491AI MIN TYP MAX IS = –100μA per Amplifier l 2 40 UNITS dB 2.5 V V IS Supply Current per Amplifier (Note 7) GBW Gain Bandwidth Product (Note 6) f = 1kHz 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C l l 110 100 90 180 kHz kHz kHz SR Slew Rate (Note 8) AV = –1, RL = ∞ 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C l l 0.035 0.031 0.030 0.06 V/μs V/μs V/μs l 50 55 μA μA The ● denotes 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 unless otherwise noted. (Note 4) LT1490AC/LT1491AC LT1490AI/LT1491AI MIN TYP MAX SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage (Note 5) LT1490A N, S Packages 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C l l LT1490A MS8 Package, LT1491A N, S Packages 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C l l LT1490A DD, LT1491A DHC 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C l l –40°C ≤ TA ≤ 85°C LT1490A DD, LT1491A DHC, –40°C ≤ TA ≤ 85°C Input Offset Voltage Drift (Note 9) IOS Input Offset Current IB Input Bias Current Input Bias Current Drift –40°C ≤ TA ≤ 85°C Input Noise Voltage 0.1Hz to 10Hz UNITS 150 700 950 1100 μV μV μV 250 1200 1350 1500 μV μV μV 285 1400 1550 1700 μV μV μV l l 2 2 6 7 l 0.2 0.8 l 1 8 l 5 pA/°C 1 μVP-P μV/°C μV/°C nA nA en Input Noise Voltage Density f = 1kHz 50 nV/√Hz in Input Noise Current Density f = 1kHz 0.015 pA/√Hz RIN Input Resistance Differential Common Mode, VCM = –15V to 14V 17 15000 MΩ MΩ CIN Input Capacitance 4.6 pF Input Voltage Range 6 l –15 29 V CMRR Common Mode Rejection Ratio VCM = –15V to 29V l 80 98 dB AVOL Large-Signal Voltage Gain VO = ±14V, RL = 10k 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C l l 100 75 50 250 V/mV V/mV V/mV VO Output Voltage Swing No Load IOUT = ±5mA IOUT = ±10mA ±14.9 ±14.5 ±14.5 ±14.978 ±14.750 ±14.670 l l V V V 14901afd 5 LT1490A/LT1491A ELECTRICAL CHARACTERISTICS The ● denotes 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 unless otherwise noted. (Note 4) SYMBOL PARAMETER CONDITIONS LT1490AC/LT1491AC LT1490AI/LT1491AI MIN TYP MAX ISC Short-Circuit Current (Note 2) Short to GND 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ±20 ±15 ±10 ±25 mA mA mA PSRR Power Supply Rejection Ratio VS = ±1.25V to ±22V 88 98 dB IS Supply Current per Amplifier GBW Gain Bandwidth Product f = 1kHz 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C SR Slew Rate AV = –1, RL = ∞, VO = ±10V, Measured at VO = ±5V 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C l 50 l l l l l 70 85 UNITS μA μA 125 110 100 200 kHz kHz kHz 0.0375 0.07 V/μs 0.0330 0.0300 V/μs V/μs The ● denotes 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 noted. (Note 4) SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage (Note 5) LT1490AHS8 LT1490AHMS8, LT1491AHS IOS IB 500 2500 μV μV 220 1000 3000 μV μV 3 6 l VCM = 44V (Note 6) l l 2 1.5 nA μA VCM = 44V (Note 6) l l 20 15 nA μA Input Bias Current Common Mode Rejection Ratio (Note 6) 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 PSRR l 110 Input Offset Voltage Drift (Note 9) Input Voltage Range VOH l UNITS Input Offset Current CMRR VOL LT1490AH/LT1491AH MIN TYP MAX Output Voltage Swing Low Output Voltage Swing High Power Supply Rejection Ratio l 0.3 l l 60 74 l 200 25 1500 V/mV V/mV l 400 50 1500 V/mV V/mV 44 V dB dB VS = 3V, No Load VS = 3V, ISINK = 2.5mA l l 15 450 mV mV VS = 5V, No Load VS = 5V, ISINK = 2.5mA l l 15 500 mV mV VS = 3V, No Load VS = 3V, ISOURCE = 5mA l l 2.925 2.350 V V VS = 5V, No Load VS = 5V, ISOURCE = 10mA l l 4.925 4.100 V V VS = 2.5V to 12.5V, VCM = VO = 1V l 80 dB l Minimum Operating Supply Voltage Reverse Supply Voltage μV/°C IS = –100μA per Amplifier l 2.5 18 V V 14901afd 6 LT1490A/LT1491A ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating temperature range of – 40°C ≤ TA ≤ 125°C. VS = ±15V, VCM = 0V, VOUT = 0V unless otherwise noted. (Note 4) SYMBOL PARAMETER IS Supply Current per Amplifier (Note 7) GBW Gain Bandwidth Product (Note 6) f = 1kHz SR Slew Rate (Note 8) AV = –1, RL = ∞ VOS Input Offset Voltage (Note 5) LT1490AHS8 LT1490AH/LT1491AH MIN TYP MAX CONDITIONS 40 l 110 60 180 kHz kHz l 0.035 0.015 0.06 V/μs V/μs l Input Offset Voltage Drift (Note 9) l IOS Input Offset Current l IB Input Bias Current l Input Voltage Range l –14.7 l 72 l 100 4 CMRR Common Mode Rejection Ratio VCM = –14.7V to 29V AVOL Large-Signal Voltage Gain VO = ±14V, RL = 10k VO Output Voltage Swing No Load IOUT = ±2.5mA l l ±14.8 ±14.3 PSRR Power Supply Rejection Ratio VS = ±1.25V to ±22V l 84 IS Supply Current per Amplifier GBW Gain Bandwidth Product f = 1kHz SR Slew Rate AV = –1, RL = ∞ 150 700 2700 μV μV 250 1200 3200 μV μV 3 7 μV/°C 2 nA 20 nA 29 V dB 250 V/mV V/mV V V dB 50 l 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. This depends on the power supply voltage and how many amplifiers are shorted. The θJA specified for the DD and DHC package is with minimal PCB heat spreading metal. Using expanded metal area on all layers of a board reduces this value. Note 3: The LT1490AC/LT1491AC and LT1490AI/LT1491AI are guaranteed functional over the operating temperature range of – 40°C to 85°C. The LT1490AH/LT1491AH are guaranteed functional over the operating temperature range of –40°C to 125°C. Note 4: The LT1490AC/LT1491AC are guaranteed to meet specified performance from 0°C to 70°C. The LT1490AC/LT1491AC are designed, characterized and expected to meet specified performance from –40°C to 85°C but are not tested or QA sampled at these temperatures. The LT1490AI/LT1491AI are guaranteed to meet specified performance from –40°C to 85°C. The LT1490AH/LT1491AH are guaranteed to meet specified performance from – 40°C to 125°C. μA μA l l LT1490AHMS8, LT1491AHS 50 70 UNITS 70 95 μA μA l 125 75 200 kHz kHz l 0.0375 0.02 0.07 V/μs V/μs Note 5: ESD (electrostatic discharge) sensitive device. Extensive use of ESD protection devices are used internal to the LT1490A/LT1491A. However, high electrostatic discharge can damage or degrade the device. Use proper ESD handling precautions. Note 6: VS = 5V limits are guaranteed by correlation to VS = 3V and VS = ±15V tests. Note 7: VS = 3V limits are guaranteed by correlation to VS = 5V and VS = ±15V tests. Note 8: Guaranteed by correlation to slew rate at VS = ±15V and GBW at VS = 3V and VS = ±15V tests. Note 9: This parameter is not 100% tested. 14901afd 7 LT1490A/LT1491A TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs Supply Voltage TA = 125°C 60 TA = 25°C 50 40 TA = –55°C 30 400 5000 300 3000 VS = 5V, 0V 200 100 TA = –55°C TA = 25°C 0 –100 20 –200 –300 10 0 5 10 15 20 25 30 35 40 TOTAL SUPPLY VOLTAGE (V) – 400 45 1 OUTPUT SATURATION VOLTAGE (V) OUTPUT SATURATION VOLTAGE (V) TA = 125°C TA = 25°C TA = –55°C 10μ 1m 10m 100μ SOURCING LOAD CURRENT (A) 1 3 4 2 TOTAL SUPPLY VOLTAGE (V) TA = 125°C TA = –55°C 10m 1490A G03 1μ 10μ 100μ 1m 10m SINKING LOAD CURRENT (A) 100m 60 50 40 30 9 10 1490A G07 OUTPUT HIGH 20 10 OUTPUT LOW 0 10 30 40 20 INPUT OVERDRIVE (mV) 50 1490A G06 Input Noise Current vs Frequency 0.35 INPUT NOISE CURRENT DENSITY (pA/√Hz) INPUT NOISE VOLTAGE DENSITY (nV/√Hz) 8 70 Noise Voltage Density vs Frequency NOISE VOLTAGE (400nV/DIV) 7 80 1490A G05 100 80 60 40 20 4 5 6 TIME (SEC) VS = 5V, 0V 90 NO LOAD 0 120 3 44 Output Saturation Voltage vs Input Overdrive TA = 25°C 0.1Hz to 10Hz Noise Voltage 2 0 4.0 4.4 4.8 5.2 5.6 COMMON MODE VOLTAGE (V) 100 1490A G04 1 –0.4 5 VS = 5V, 0V 1m 0.1μ 100m VS = ±2.5V TA = 125°C 10 –10 0 100m 100m TA = 25°C 20 Output Saturation Voltage vs Load Current (Output Low) VS = 5V, 0V 0 30 1490A G02 Output Saturation Voltage vs Load Current (Output High) 1μ TA = –55°C 0 TA = 125°C 1490A G01 1 1000 OUTPUT SATURATION VOLTAGE (mV) 0 10m INPUT BIAS CURRENT (nA) CHANGE IN INPUT OFFSET VOLTAGE (μV) SUPPLY CURRENT PER AMPLIFIER (μA) 80 70 Input Bias Current vs Common Mode Voltage Minimum Supply Voltage 0.30 0.25 0.20 0.15 0.10 0.05 0 1 10 100 FREQUENCY (Hz) 1k 1490A G08 1 10 100 FREQUENCY (Hz) 1k 1490A G09 14901afd 8 LT1490A/LT1491A TYPICAL PERFORMANCE CHARACTERISTICS Gain and Phase Shift vs Frequency Gain Bandwidth Product vs Temperature 40 30 20 20 0 GAIN 10 f = 1kHz –20 0 – 40 –10 – 60 –20 – 80 –30 1 PHASE SHIFT (DEG) GAIN (dB) 240 60 PHASE 40 80 –100 1000 10 100 FREQUENCY (kHz) 200 VS = ±15V 180 VS = ±1.5V 160 100 –50 –25 50 25 0 75 TEMPERATURE (°C) 220 40 210 200 GAIN BANDWIDTH 30 180 20 170 RL = 10k f = 1kHz COMMON MODE REJECTION RATIO (dB) 50 PHASE MARGIN (DEG) GAIN BANDWIDTH PRODUCT (kHz) 0.04 –50 –25 125 100 VS = ±15V 80 VS = ±1.5V 60 40 VS = ±2.5V 70 60 POSITIVE SUPPLY 50 40 30 20 NEGATIVE SUPPLY 10 0 –10 –20 1 10 125 100 PSRR vs Frequency 80 20 10 15 20 25 30 35 40 TOTAL SUPPLY VOLTAGE (V) 50 25 0 75 TEMPERATURE (°C) 1490A G12 CMRR vs Frequency PHASE MARGIN 5 100 120 240 0 FALLING, VS = ±1.5V 120 60 150 FALLING, VS = ±15V 1490A G11 250 160 RISING, VS = ±1.5V 0.08 0.06 140 Gain Bandwidth Product and Phase Margin vs Supply Voltage 190 RISING, VS = ±15V 0.10 220 1490A G10 230 Slew Rate vs Temperature 0.12 POWER SUPPLY REJECTION RATIO (dB) 50 260 SLEW RATE (V/μs) VS = ±2.5V 60 100 GAIN BANDWIDTH PRODUCT (kHz) 70 45 10 FREQUENCY (kHz) 1 100 10 FREQUENCY (kHz) 100 1490A G15 1490A G14 1490A G13 Gain Bandwidth Product and Phase Margin vs Load Resistance PHASE MARGIN 250 70 60 50 200 GAIN BANDWIDTH 150 40 100 30 50 1 10 LOAD RESISTANCE (kΩ) 20 100 1490A G16 VS = ±15V 110 OUTPUT IMPEDANCE (Ω) 300 Output Impedance vs Frequency 10k 120 CHANNEL SEPARATION (dB) VS = ±2.5V AV = –1 RF = RG = 100k f = 1kHz Channel Separation vs Frequency 130 80 PHASE MARGIN (DEG) GAIN BANDWIDTH PRODUCT (kHz) 350 100 90 80 70 60 VS = ±2.5V 1k AV = 100 100 AV = 10 10 1 AV = 1 50 40 0.1 1 10 FREQUENCY (kHz) 100 1490A G17 0.1 0.1 1 10 FREQUENCY (kHz) 100 1490A G18 14901afd 9 LT1490A/LT1491A TYPICAL PERFORMANCE CHARACTERISTICS Undistorted Output Swing vs Frequency Settling Time to 0.1% vs Output Step 10 35 DISTORTION ≤ 1% VS = ±15V 30 15 10 VS = 5V, 0V 5 –4 0 100 60 50 40 AV = 1 AV = 2 AV = 10 AV = 5 30 10 0 –10 1 10 FREQUENCY (kHz) 70 20 AV = –1 AV = 1 20 40 60 80 100 120 140 160 SETTLING TIME (μs) 10 100 1000 CAPACITIVE LOAD (pF) 10000 1490A G19 1490A F20 1490A G21 Total Harmonic Distortion + Noise vs Frequency Total Harmonic Distortion + Noise vs Load Resistance Total Harmonic Distortion + Noise vs Output Voltage 10 VS = 3V, 0V VOUT = 2VP-P VCM = 1.2V RL = 50k 1 VS = ±1.5V VIN = ±1V 0.1 VS = 3V, 0V VIN = 0.5V TO 2.5V 0.1 1 FREQUENCY (kHz) 10 0.001 0.1 AV = –1 VS = 3V, 0V 0.001 1 10 LOAD RESISTANCE TO GROUND (kΩ) 1490A G22 Open-Loop Gain AV = 1 VS = ±1.5V AV = 1 VS = 3V, 0V VS = 3V, 0V VIN = 0.2V TO 2.2V AV = 1 CHANGE IN INPUT OFFSET VOLTAGE (100μV/DIV) AV = –1 VS = ±1.5V 0.1 0.01 0.01 AV = –1 0.001 0.01 RL = 10k VCM = HALF SUPPLY f = 1kHz 1 0.1 0.01 10 VS = 3V TOTAL AV = 1 VIN = 2VP-P AT 1kHz THD + NOISE (%) THD + NOISE (%) 1 0 –2 –6 THD + NOISE (%) 10 2 –8 0 0.1 80 AV = 1 4 VS = 5V, 0V ISOURCE = 170μA 90 AV = –1 OVERSHOOT (%) OUTPUT STEP (V) OUTPUT SWING (VP-P) 20 100 VS = ±15V 8 6 25 Capacitive Load Handling, Overshoot vs Capacitive Load 100 0 1 2 OUTPUT VOLTAGE (VP-P) 1490A G24 1490A G23 Large-Signal Response 3 Small-Signal Response VS = ±15V RL = 2k RL = 10k RL = 50k –10V 0V 10V OUTPUT VOLTAGE (5V/DIV) 1490A G25 VS = ±15V AV = –1 1491A G26 VS = ±15V AV = 1 1491A G27 14901afd 10 LT1490A/LT1491A APPLICATIONS INFORMATION Supply Voltage The positive supply pin of the LT1490A/LT1491A 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 LT1490A/LT1491A are protected against reverse battery voltages up to 18V. In the event a reverse battery condition occurs, the supply current is less than 1nA. The LT1490A/LT1491A can be shut down by removing V +. In this condition the input bias current is typically less than 0.5nA, even if the inputs are 44V above the negative supply. When operating the LT1490A/LT1491A on total supplies of 20V or more, the supply must not rise to its final voltage in less 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. A resistance of 7.5Ω in the supply or in the bypass capacitor will dampen the tuned circuit enough to limit the rise time. Inputs The LT1490A/LT1491A have 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 –1nA. 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 25nA. 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 LT1490A/LT1491A to operate with either or both of their 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 700μV when operating above V+. The LT1490A/LT1491A will operate with their inputs 44V above V – regardless of V +. The inputs are protected against excursions as much as 15V 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 15V 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 LT1490A/LT1491A is affected by input overdrive as shown in the typical performance curves. The output of the LT1490A/LT1491A can be pulled up to 18V beyond V + with less than 1nA of leakage current, provided that V+ is less than 0.5V. 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 LT1490A/LT1491A are 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 LT1490A/LT1491A switch 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 LT1490A/ LT1491A 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. 14901afd 11 LT1490A/LT1491A APPLICATIONS INFORMATION 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. Gain The open-loop gain is almost independent of load when the output is sourcing current. This optimizes performance TYPICAL APPLICATIONS Square Wave Oscillator Optional Output Compensation for Capacitive Loads Greater Than 200pF 59k 5V + VIN 100k 1/2 LT1490A + 1/2 LT1490A 100k CL ≤ 10,000pF – VOUT – R 50k C 0.1μF 0.22μF 150Ω 1490A TA02 1490A TA04 f= 1 2RC VOUT = 5VP-P WITH 5V SUPPLY IS = 200μA AT VS = 5V, R = 50k, C = 1nF OUTPUT IS 5kHz SLEW LIMITED TRIANGLE WAVE SIMPLIFIED SCHEMATIC V+ Q2 Q1 D1 R1 30k Q3 D2 Q22 D3 R2 1k Q4 Q19 – IN Q17 Q7 R3 1k + Q8 Q11 OUT Q16 +IN 2μA Q18 Q15 Q9 Q5 Q20 Q12 Q6 D4 D5 Q10 Q13 Q14 R4 40k Q21 R5 40k V– ONE AMPLIFIER 1490A SS 14901afd 12 LT1490A/LT1491A PACKAGE DESCRIPTION Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. DD Package 8-Lead Plastic DFN (3mm w 3mm) (Reference LTC DWG # 05-08-1698 Rev C) R = 0.125 TYP 5 0.40 t 0.10 8 0.70 t0.05 3.00 t0.10 (4 SIDES) 3.5 t0.05 1.65 t0.05 2.10 t0.05 (2 SIDES) 1.65 t 0.10 (2 SIDES) PIN 1 TOP MARK (NOTE 6) 0.200 REF PACKAGE OUTLINE 4 0.25 t 0.05 0.75 t0.05 (DD8) DFN 0509 REV C 1 0.25 t 0.05 0.50 BSC 0.50 BSC 2.38 t0.05 2.38 t0.10 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1) 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. 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 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON TOP AND BOTTOM OF PACKAGE MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660 Rev F) 3.00 t 0.102 (.118 t .004) (NOTE 3) 0.889 t 0.127 (.035 t .005) 0.254 (.010) 5.23 (.206) MIN 3.20 – 3.45 (.126 – .136) 0.65 (.0256) BSC RECOMMENDED SOLDER PAD LAYOUT 7 6 5 0.52 (.0205) REF 3.00 t 0.102 (.118 t .004) (NOTE 4) 4.90 t 0.152 (.193 t .006) DETAIL “A” 0s – 6s TYP GAUGE PLANE 1 0.53 t 0.152 (.021 t .006) 0.42 t 0.038 (.0165 t .0015) TYP 8 DETAIL “A” 1.10 (.043) MAX 2 3 4 0.86 (.034) REF 0.18 (.007) SEATING PLANE 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 0.22 – 0.38 (.009 – .015) TYP 0.65 (.0256) BSC 0.1016 t 0.0508 (.004 t .002) MSOP (MS8) 0307 REV F 14901afd 13 LT1490A/LT1491A PACKAGE DESCRIPTION Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. N Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510 Rev I) .300 – .325 (7.620 – 8.255) 8.255 +0.889 –0.381 .130 t .005 (3.302 t 0.127) .045 – .065 (1.143 – 1.651) .065 (1.651) TYP .008 – .015 (0.203 – 0.381) +.035 .325 –.015 .400* (10.160) MAX 8 7 6 1 2 3 5 .255 t .015* (6.477 t 0.381) .120 (3.048) .020 MIN (0.508) MIN .018 t .003 .100 (2.54) BSC  4 N8 REV I 0711 (0.457 t 0.076) 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 p.005 .050 BSC 8 .245 MIN 7 6 5 .160 p.005 .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) .030 p.005 TYP 1 RECOMMENDED SOLDER PAD LAYOUT .010 – .020 s 45o (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 0o– 8o TYP .016 – .050 (0.406 – 1.270) NOTE: 1. DIMENSIONS IN .053 – .069 (1.346 – 1.752) .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 0303 14901afd 14 LT1490A/LT1491A PACKAGE DESCRIPTION Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. N Package 14-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510 Rev I) .770* (19.558) MAX 14 13 12 11 10 9 8 1 2 3 4 5 6 7 .255 ± .015* (6.477 ± 0.381) .300 – .325 (7.620 – 8.255) .045 – .065 (1.143 – 1.651) .130 ± .005 (3.302 ± 0.127) .020 (0.508) MIN .065 (1.651) TYP .008 – .015 (0.203 – 0.381) +.035 .325 –.015 +0.889 8.255 –0.381 .005 (0.127) .100 MIN (2.54) BSC .120 (3.048) MIN  NOTE: 1. DIMENSIONS ARE .018 ± .003 (0.457 ± 0.076) N14 REV I 0711 INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm) S Package 14-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .337 – .344 (8.560 – 8.738) NOTE 3 .045 ±.005 .050 BSC 14 N 12 11 10 9 8 N .245 MIN .160 ±.005 .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) 1 .030 ±.005 TYP 13 2 3 N/2 N/2 RECOMMENDED SOLDER PAD LAYOUT 1 .010 – .020 w 45 (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 2 3 4 5 .053 – .069 (1.346 – 1.752) NOTE: 1. DIMENSIONS IN .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) 7 .004 – .010 (0.101 – 0.254) 0° – 8° TYP .016 – .050 (0.406 – 1.270) 6 .050 (1.270) BSC S14 0502 14901afd 15 LT1490A/LT1491A PACKAGE DESCRIPTION Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. DHC Package 16-Lead Plastic DFN (5mm × 3mm) (Reference LTC DWG # 05-08-1706) 0.65 p0.05 3.50 p0.05 1.65 p0.05 2.20 p0.05 (2 SIDES) PACKAGE OUTLINE 0.25 p 0.05 0.50 BSC 4.40 p0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS R = 0.115 TYP 5.00 p0.10 (2 SIDES) R = 0.20 TYP 3.00 p0.10 (2 SIDES) 9 0.40 p 0.10 16 1.65 p 0.10 (2 SIDES) PIN 1 TOP MARK (SEE NOTE 6) PIN 1 NOTCH (DHC16) DFN 1103 8 0.200 REF 1 0.25 p 0.05 0.50 BSC 0.75 p0.05 4.40 p0.10 (2 SIDES) 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD NOTE: 1. DRAWING PROPOSED TO BE MADE VARIATION OF VERSION (WJED-1) IN JEDEC PACKAGE OUTLINE MO-229 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. 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 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 14901afd 16 LT1490A/LT1491A REVISION HISTORY (Revision history begins at Rev C) REV DATE DESCRIPTION PAGE NUMBER C 10/10 Changed units from mV to V for VO in Electrical Characteristics D 12/11 7 Updated package drawings 13-16 Revised Order Information 3 14901afd 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. 17 LT1490A/LT1491A TYPICAL APPLICATION Ring-Tone Generator 60V R16 100k R2 47k R3 10k C2 0.47μF 3 + R1 1/4 LT1491A 33k 2 1 D1 1N4148 R5 100k 5 – 7 R9 300k R7 16k – R11 10k 10 + 1/4 LT1491A C4 0.068μF 9 R4 1.6M R8 620k CADENCE OSCILLATOR 8 13 – R14 10k R13 130k R15 47k C5 0.01μF 4 – 1/4 LT1491A R12 R10 SMOOTHING FILTER 10k 620k 20Hz OSCILLATOR + R24 11 420 14 C7 47μF R18 100Ω R26 2k R23 4.7k OPTO1* R25 4.7k Q5 2N3904 Z2 15V *LED OF OPTO1 ILLUMINATES WHEN THE PHONE IS OFF THE HOOK SEE DESIGN NOTE DN134 FOR A DISCUSSION OF THE CIRCUIT R17 620Ω Z1 15V 100k 12 C1 1μF Q3 2N3904 C3 0.047μF + 1/4 LT1491A 6 Q1 IRF628 R6 10k UP TO LOAD TEN PHONES R19 620Ω Q4 2N3906 Q2 IRF9620 R21 150Ω C6 0.033μF POWER AMPLIFIER –180V R20 100k 1490A TA03 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1366/LT1367 Dual/Quad Precision, Rail-to-Rail Input and Output Op Amps 475μV VOS(MAX), 500V/mV AVOL(MIN), 400kHz 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 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 14901afd 18 Linear Technology Corporation LT 1211 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 2011