LT6003/LT6004/LT6005 1.6V, 1µA Precision Rail-to-Rail Input and Output Op Amps FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTION Wide Supply Range: 1.6V to 16V Low Supply Current: 1µA/Amplifier Max Low Input Bias Current: 90pA Max Low Input Offset Voltage: 500µV Max Low Input Offset Voltage Drift: 1µV/°C CMRR: 100dB PSRR: 95dB AVOL Driving 20kΩ Load: 100,000 Min Capacitive Load Handling: 500pF Specified from –40°C to 125°C Tiny 2mm × 2mm DFN Package APPLICATIONS ■ ■ ■ ■ Portable Gas Monitors Battery- or Solar-Powered Systems Low Voltage Signal Processing Micropower Active Filters The LT®6003/LT6004/LT6005 are single/dual/quad op amps designed to maximize battery life and performance for portable applications. These amplifiers operate on supplies as low as 1.6V and are fully specified and guaranteed over temperature on 1.8V, 5V and ±8V supplies while only drawing 1µA maximum quiescent current. The ultralow supply current and low operating voltage are combined with excellent amplifier specifications; input offset voltage of 500µV maximum with a typical drift of only 1µV/°C, input bias current of 90pA maximum, open loop gain of 100,000 and the ability to drive 500pF capacitive loads, making the LT6003/LT6004/LT6005 amplifiers ideal when excellent performance is required in battery powered applications. The single LT6003 is available in the 5-pin TSOT-23 and tiny 2mm × 2mm DFN packages. The dual LT6004 is available in the 8-pin MSOP and 3mm × 3mm DFN packages. The quad LT6005 is available in the 16-pin TSSOP and 5mm × 3mm DFN packages. These devices are specified over the commercial, industrial and automotive temperature ranges. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Start-Up Characteristics Supply Current vs Supply Voltage Micropower Oxygen Sensor 100k 1% OXYGEN SENSOR CITY TECHNOLOGY 4OX(2) 100k 1% 1.6V LT6003 VOUT = 1V IN AIR ISUPPLY = 0.95µA 100Ω 1% SUPPLY CURRENT PER AMPLIFIER (µA) 2.5 10M 1% AV = 1 VCM = 0.5V 2.0 TA = 125°C 1.5 TA = 85°C 1.0 TA = 25°C 0.5 TA = –55°C 0 0.5 www.citytech.com 600345 TA01a 0.7 0.9 1.1 1.3 1.5 1.7 1.9 TOTAL SUPPLY VOLTAGE (V) 2.1 600345 TA01b 600345f 1 LT6003/LT6004/LT6005 ABSOLUTE MAXIMUM RATINGS (Note 1) Total Supply Voltage (V+ to V–) .................................18V Differential Input Voltage ..........................................18V Input Voltage Below V– ...............................................9V Input Current..........................................................10mA Output Short Circuit Duration (Note 2) ............ Indefinite Operating Temperature Range (Note 3) LT6003C, LT6004C, LT6005C............... –40°C to 85°C LT6003I, LT6004I, LT6005I .................. –40°C to 85°C LT6003H, LT6004H, LT6005H ............ –40°C to 125°C Specified Temperature Range (Note 4) LT6003C, LT6004C, LT6005C................... 0°C to 70°C LT6003I, LT6004I, LT6005I .................. –40°C to 85°C LT6003H, LT6004H, LT6005H ............ –40°C to 125°C Junction Temperature DFN Packages ................................................... 125°C All Other Packages ............................................ 150°C Storage Temperature Range DFN Packages .................................... –65°C to 125°C All Other Packages ............................. –65°C to 150°C Lead Temperature (Soldering, 10 sec.) TSOT, MSOP, TSSOP Packages......................... 300°C PACKAGE/ORDER INFORMATION TOP VIEW TOP VIEW +IN 1 –IN 2 – + OUT 1 V+ V– 2 5 – + OUT 3 5 V+ 4 –IN +IN 3 4 DC PACKAGE 4-LEAD (2mm × 2mm) PLASTIC DFN TJMAX = 125°C, θJA = 102°C/W (NOTE 2) EXPOSED PAD (PIN 5) IS V–, MUST BE SOLDERED TO PCB S5 PACKAGE 5-LEAD PLASTIC TSOT-23 TJMAX = 150°C, θJA = 250°C/W 8 V+ +IN A 3 V– 4 – +A 9 7 OUT B – B+ 6 –IN B 5 +IN B DD PACKAGE 8-LEAD (3mm × 3mm) PLASTIC DFN TJMAX = 125°C, θJA = 160°C/W (NOTE 2) EXPOSED PAD (PIN 9) CONNECTED TO V– (PCB CONNECTION OPTIONAL) TOP VIEW OUT A –IN A +IN A V– 1 2 3 4 – + + – –IN A 2 DC PART MARKING* LT6003CDC LT6003IDC LT6003HDC LCKF LCKF LCKF ORDER PART NUMBER S5 PART MARKING* LT6003CS5 LT6003IS5 LT6003HS5 ORDER PART NUMBER TOP VIEW OUT A 1 ORDER PART NUMBER 8 7 6 5 V+ OUT B –IN B +IN B MS8 PACKAGE 8-LEAD PLASTIC MSOP TJMAX = 150°C, θJA = 250°C/W LT6004CDD LT6004IDD LT6004HDD ORDER PART NUMBER LT6004CMS8 LT6004IMS8 LT6004HMS8 LTCKG LTCKG LTCKG DD PART MARKING* LCCB LCCB LCCB MS8 PART MARKING* LTCBZ LTCBZ LTCBZ 600345f 2 LT6003/LT6004/LT6005 PACKAGE/ORDER INFORMATION TOP VIEW TOP VIEW 7 8 11 –IN C 10 OUT C 9 NC DHC PACKAGE 16-LEAD (5mm × 3mm) PLASTIC DFN TJMAX = 125°C, θJA = 160°C/W (NOTE 2) EXPOSED PAD (PIN 17) CONNECTED TO V–, (PCB CONNECTION OPTIONAL) 3 V+ 4 +IN B 5 –IN B 6 OUT B 7 10 OUT C NC 8 9 A D 15 –IN D 14 +IN D 13 V– B – C +IN A DHC PART MARKING* LT6005CDHC LT6005IDHC LT6005HDHC 6005 6005 6005 ORDER PART NUMBER GN PART MARKING LT6005CGN LT6005IGN LT6005HGN 6005 6005I 6005H 16 OUT D 12 +IN C – + – NC + OUT B B – 6 12 +IN C 2 + –IN B 13 V– 17 1 –IN A + 5 14 +IN D OUT A + +IN B 15 –IN D + 4 – V+ D A + 3 – +IN A 16 OUT D + 2 – 1 –IN A – OUT A ORDER PART NUMBER 11 –IN C C NC GN PACKAGE 16-LEAD PLASTIC TSSOP TJMAX = 150°C, θJA = 135°C/W Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. ELECTRICAL CHARACTERISTICS (LT6003C/I, LT6004C/I, LT6005C/I) The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 1.8V, 0V, VCM = 0.5V; VS = 5V, 0V, VCM = 2.5V, VOUT = half supply, RL to ground, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN VOS Input Offset Voltage LT6003S5, LT6004MS8 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ● ● LT6005GN 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ● ● LT6004DD, LT6005DHC 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ● ● LT6003DC 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ● ● TYP MAX UNITS 175 500 725 950 µV µV µV 190 650 925 1.15 µV µV mV 290 850 1.15 1.4 µV mV mV 290 950 1.3 1.6 µV mV mV ΔVOS/ΔT Input Offset Voltage Drift (Note 5) S5, MS8, GN DC, DD, DHC ● ● 2 2 5 7 IB Input Bias Current (Note 7) VCM = 0.3V, 0°C ≤ TA ≤ 70°C VCM = V+ – 0.3V, 0°C ≤ TA ≤ 70°C VCM = 0.3V, –40°C ≤ TA ≤ 85°C VCM = V+ – 0.3V, –40°C ≤ TA ≤ 85°C VCM = 0V ● ● ● ● ● 5 40 5 40 130 90 140 120 170 1.4 pA pA pA pA nA IOS Input Offset Current (Note 7) VCM = 0.3V VCM = V+ – 0.3V VCM = 0V ● ● ● 5 7 5 80 80 100 pA pA pA µV/°C µV/°C 600345f 3 LT6003/LT6004/LT6005 ELECTRICAL CHARACTERISTICS (LT6003C/I, LT6004C/I, LT6005C/I) The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 1.8V, 0V, VCM = 0.5V; VS = 5V, 0V, VCM = 2.5V, VOUT = half supply, RL to ground, unless otherwise noted. SYMBOL PARAMETER CONDITIONS Input Noise Voltage 0.1Hz to 10Hz MIN TYP MAX 3 UNITS µVP-P en Input Noise Voltage Density f = 100Hz 325 nV/√Hz in Input Noise Current Density f = 100Hz 12 fA/√Hz RIN Input Resistance Differential Common Mode CIN Input Capacitance CMRR Common Mode Rejection Ratio (Note 7) PSRR AVOL 10 2000 GΩ GΩ 6 pF VS = 1.8V VCM = 0V to 0.7V VCM = 0V to 1.8V, S5, MS8, GN VCM = 0V to 1.8V, DC, DD, DHC ● ● ● 73 63 60 100 80 78 dB dB dB VS = 5V VCM = 0V to 3.9V VCM = 0V to 5V, S5, MS8, GN VCM = 0V to 5V, DC, DD, DHC ● ● ● 88 72 69 115 90 86 dB dB dB Input Offset Voltage Shift (Note 7) VCM = 0V to V+ – 1.1V VCM = 0V to V+, S5, MS8, GN VCM = 0V to V+, DC, DD, DHC ● ● ● Input Voltage Range Guaranteed by CMRR ● 0 Power Supply Rejection Ratio VS = 1.6V to 6V, VCM = 0.5V, 0°C ≤ TA ≤ 70°C VS = 1.7V to 6V, VCM = 0.5V, –40°C ≤ TA ≤ 85°C ● ● 80 78 Minimum Supply Voltage Guaranteed by PSRR, 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ● ● 1.6 1.7 Large Signal Voltage Gain (Note 7) VS = 1.8V RL = 20kΩ, VOUT = 0.25V to 1.25V 25 15 150 ● V/mV V/mV VS = 5V RL = 20kΩ, VOUT = 0.25V to 4.25V 100 60 500 ● V/mV V/mV 7 0.16 0.23 155 1.3 1.8 µV mV mV V+ V 95 95 dB dB V V VOL Output Swing Low (Notes 6, 8) No Load ISINK = 100µA ● ● 15 110 50 240 mV mV VOH Output Swing High (Notes 6, 9) No Load ISOURCE = 100µA ● ● 45 200 100 350 mV mV ISC Short Circuit Current (Note 8) Short to GND 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C 2 1.5 0.5 5 ● ● mA mA mA Short to V+ 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C 2 1.5 0.5 7 ● ● mA mA mA VS = 1.8V 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ● ● VS = 5V 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ● ● IS Supply Current per Amplifier GBW Gain Bandwidth Product f = 100Hz SR Slew Rate (Note 8) AV = –1, RF = RG = 1MΩ 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C FPBW Full Power Bandwidth VOUT = 1.5VP-P (Note 10) ● ● 0.55 0.4 0.2 0.85 1 1.4 1.6 µA µA µA 1 1.2 1.6 1.9 µA µA µA 2 kHz 0.8 V/ms V/ms V/ms 170 Hz 600345f 4 LT6003/LT6004/LT6005 ELECTRICAL CHARACTERISTICS (LT6003H, LT6004H, LT6005H) The ● denotes the specifications which apply over the full specified temperature range of –40°C ≤ TA ≤ 125°C. VS = 1.8V, 0V, VCM = 0.5V; VS = 5V, 0V, VCM = 2.5V, VOUT = half supply, RL to ground, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN VOS Input Offset Voltage LT6003S5, LT6004MS8 LT6005GN LT6004DD, LT6005DHC LT6003DC ● ● ● ● ΔVOS/ΔT Input Offset Voltage Drift (Note 5) S5, MS8, GN DC, DD, DHC ● ● IB Input Bias Current (Note 7) LT6003, VCM = 0.3V, V+ – 0.3V LT6004, LT6005, VCM = 0.3V, V+ – 0.3V IOS Input Offset Current (Note 7) CMRR Common Mode Rejection Ratio (Note 7) TYP MAX 1.5 1.7 1.9 2.1 2 3 UNITS mV mV mV mV 6 8 µV/°C µV/°C ● ● 6 12 nA nA LT6003, VCM = 0.3V, V+ – 0.3V LT6004, LT6005, VCM = 0.3V, V+ – 0.3V ● ● 2 4 nA nA VS = 1.8V VCM = 0.3V to 0.7V VCM = 0.3V to 1.5V, S5, MS8, GN VCM = 0.3V to 1.5V, DC, DD, DHC ● ● ● 67 57 55 dB dB dB VS = 5V VCM = 0.3V to 3.9V VCM = 0.3V to 4.7V, S5, MS8, GN VCM = 0.3V to 4.7V, DC, DD, DHC ● ● ● 86 68 66 dB dB dB Input Offset Voltage Shift (Note 7) VCM = 0.3V to V+ – 1.1V VCM = 0.3V to V+ – 0.3V, S5, MS8, GN VCM = 0.3V to V+ – 0.3V, DC, DD, DHC ● ● ● Input Voltage Range Guaranteed by CMRR ● 0.3 PSRR Power Supply Rejection Ratio VS = 1.7V to 6V, VCM = 0.5V ● 76 Minimum Supply Guaranteed by PSRR ● 1.7 AVOL Large Signal Voltage Gain (Note 7) VS = 1.8V, RL = 20kΩ, VOUT = 0.4V to 1.25V ● 4 V/mV VS = 5V, RL = 20kΩ, VOUT = 0.4V to 4.25V ● 20 V/mV 180 1.7 2.2 V+ – 0.3V µV mV mV V dB V VOL Output Swing Low (Notes 6, 8) No Load ISINK = 100µA ● ● 60 275 mV mV VOH Output Swing High (Notes 6, 9) No Load ISOURCE = 100µA ● ● 120 400 mV mV ISC Short Circuit Current (Note 8) Short to GND ● 0.5 mA Short to V+ ● 0.5 mA IS Supply Current per Amplifier VS = 1.8V VS = 5V ● ● SR Slew Rate (Note 8) AV = –1, RF = RG = 1MΩ ● 2.2 2.5 0.2 µA µA V/ms 600345f 5 LT6003/LT6004/LT6005 ELECTRICAL CHARACTERISTICS (LT6003C/I, LT6004C/I, LT6005C/I) The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = ±8V, VCM = VOUT = half supply, RL to ground, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN VOS Input Offset Voltage LT6003S5, LT6004MS8 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ● ● LT6005GN 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ● ● LT6004DD, LT6005DHC 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ● ● LT6003DC 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ● ● TYP MAX UNITS 185 600 825 1.05 µV µV mV 200 750 1.05 1.25 µV mV mV 300 950 1.25 1.5 µV mV mV 300 1.05 1.4 1.65 mV mV mV ΔVOS/ΔT Input Offset Voltage Drift (Note 5) S5, MS8, GN DC, DD, DHC ● ● 2 2 5 7 IB Input Bias Current 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ● ● IOS Input Offset Current 7 7 7 100 150 90 ● Input Noise Voltage 0.1Hz to 10Hz 3 µV/°C µV/°C pA pA pA µVP-P en Input Noise Voltage Density f = 100Hz 325 nV/√Hz in Input Noise Current Density f = 100Hz 12 fA/√Hz RIN Input Resistance Differential Common Mode CIN Input Capacitance CMRR Common Mode Rejection Ratio VCM = –8V to 6.9V VCM = –8V to 8V, S5, MS8, GN VCM = –8V to 8V, DC, DD, DHC ● ● ● Input Offset Voltage Shift VCM = –8V to 6.9V VCM = –8V to 8V, S5, MS8, GN VCM = –8V to 8V, DC, DD, DHC ● ● ● Input Voltage Range Guaranteed by CMRR ● –8 ● 86 PSRR Power Supply Rejection Ratio VS = ±1.1V to ±8V AVOL Large Signal Voltage Gain RL = 100kΩ, VOUT = –7.3V to 7.3V VOL Output Swing Low (Notes 6, 8) ● ● VOH Output Swing High (Notes 6, 9) ISC Short Circuit Current No Load ISINK = 100µA No Load ISOURCE = 100µA Short to GND 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C f = 100Hz ● ● IS ● ● ● ● Gain Bandwidth Product SR Slew Rate (Note 8) Full Power Bandwidth AV = –1, RF = RG = 1MΩ 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C VOUT = 14VP-P (Note 10) GΩ GΩ pF 120 100 96 dB dB dB 15 0.16 0.25 4 3 1 Supply Current per Amplifier GBW FPBW 92 82 78 10 2000 6 8 ● ● µV mV mV V 105 dB 350 V/mV 10 105 50 195 9 50 240 120 350 1.25 1.5 1.9 2.2 3 0.55 0.4 0.2 375 1.3 2 1.3 30 mV mV mV mV mA mA mA µA µA µA kHz V/ms V/ms V/ms Hz 600345f 6 LT6003/LT6004/LT6005 ELECTRICAL CHARACTERISTICS (LT6003H, LT6004H, LT6005H) The ● denotes the specifications which apply over the full specified temperature range of –40°C ≤ TA ≤ 125°C. VS = ±8V, VCM = VOUT = half supply, RL to ground, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN VOS Input Offset Voltage LT6003S5, LT6004MS8 LT6005GN LT6004DD, LT6005DHC LT6003DC ● ● ● ● ΔVOS/ΔT Input Offset Voltage Drift (Note 5) S5, MS8, GN DC, DD, DHC ● ● IB Input Bias Current LT6003 LT6004, LT6005 IOS Input Offset Current CMRR TYP MAX 1.6 1.8 2 2.2 2 3 UNITS mV mV mV mV 6 8 µV/°C µV/°C ● ● 6 12 nA nA LT6003 LT6004, LT6005 ● ● 2 4 nA nA Common Mode Rejection Ratio VCM = –7.7V to 6.9V VCM = –7.7V to 7.7V, S5, MS8, GN VCM = –7.7V to 7.7V, DC, DD, DHC ● ● ● Input Offset Voltage Shift VCM = –7.7V to 6.9V VCM = –7.7V to 7.7V, S5, MS8, GN VCM = –7.7V to 7.7V, DC, DD, DHC ● ● ● 90 78 76 dB dB dB 460 1.9 2.5 µV mV mV Input Voltage Range Guaranteed by CMRR ● –7.7 PSRR Power Supply Rejection Ratio VS = ±1.1V to ±8V ● 84 VOL Output Swing Low (Notes 6, 8) No Load ISINK = 100µA ● ● 60 275 mV mV VOH Output Swing High (Note 6) No Load ISOURCE = 100µA ● ● 140 400 mV mV ISC Short Circuit Current Short to GND ● IS Supply Current per Amplifier SR Slew Rate (Note 8) 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 specfied for the DC, DD and DHC packages is with minimal PCB heat spreading metal. Using expanded metal area on all layers of a board reduces this value. Note 3: The LT6003C/LT6004C/LT6005C and LT6003I/LT6004I/LT6005I are guaranteed functional over the temperature range of –40°C to 85°C. The LT6003H/LT6004H/LT6005H are guaranteed functional over the operating temperature range of –40°C to 125°C. Note 4: The LT6003C/LT6004C/LT6005C are guaranteed to meet specified performance from 0°C to 70°C. The LT6003C/LT6004C/LT6005C are ● mA 3 0.2 V dB 1 ● AV = –1, RF = RG = 1MΩ 7.7 µA V/ms 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 LT6003I/LT6004I/LT6005I are guaranteed to meet specified performance from –40°C to 85°C. The LT6003H/LT6004H/LT6005H are guaranteed to meet specified performance from –40°C to 125°C. Note 5: This parameter is not 100% tested. Note 6: Output voltage swings are measured between the output and power supply rails. Note 7: Limits are guaranteed by correlation to VS = 5V tests. Note 8: Limits are guaranteed by correlation to VS = 1.8V tests Note 9: Limits are guaranteed by correlation to VS = ±8V tests Note 10: Full-power bandwidth is calculated from the slew rate: FPBW = SR/πVP-P. 600345f 7 LT6003/LT6004/LT6005 TYPICAL PERFORMANCE CHARACTERISTICS VOS Distribution TC VOS Distribution 20 16 20 15 10 Supply Current vs Supply Voltage 5.0 VS = 5V, 0V VCM = 2.5V MS8, GN16, SOT23 PACKAGES –40°C TO 85°C 18 PERCENT OF UNITS (%) PERCENT OF UNITS (%) VS = 5V, 0V VCM = 2.5V 30 MS8 PACKAGE 1377 AMPLIFIERS 25 14 SUPPLY CURRENT PER AMPLIFIER (µA) 35 12 10 8 6 4 5 2 –400 –200 0 200 400 INPUT OFFSET VOLTAGE (µV) 0 600 –5 –4 –3 –2 –1 0 1 2 3 DISTRIBUTION (µV/°C) 600345 G01 300 200 200 OFFSET VOTLAGE (µV) CHANGE IN OFFSET VOLTAGE (µV) 250 TA = –55°C 50 TA = 25°C 0 TA = 125°C –50 –100 1.5 2.0 2.5 TOTAL SUPPLY VOLTAGE (V) 1 TA = 25°C 0 TA = –55°C –100 TA = 125°C –200 0 TA = –55°C TA = 25°C –0.2 –0.3 –0.4 0 0 2 1 3 4 COMMON MODE VOLTAGE (V) 5 600345 G07 2 6 8 4 10 12 SUPPLY VOLTAGE (V) 14 100 50 4 6 8 10 12 14 TOTAL SUPPLY VOLTAGE (V) TA = 25°C 0 TA = –55°C –50 –100 –150 TA = 125°C –200 –300 2 VS = 5V, 0V TYPICAL PART 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 INPUT COMMON MODE VOLTAGE (V) 16 Output Saturation Voltage vs Load Current (Output Low) 1.0 VS = 5V, 0V INPUT OVERDRIVE = 30mV TA = 125°C TA = 25°C TA = –55°C 0.01 0.00001 0.1 0.001 SOURCING LOAD CURRENT (mA) 5 600345 G06 60012 G05 0.1 16 600345 G03 OUTPUT LOW SATURATION VOLTAGE (V) TA = 85°C –0.1 0.5 –400 0 OUTPUT HIGH SATURATION VOLTAGE (V) INPUT BIAS CURRENT (nA) 1.0 TA = –55°C 1.0 –250 1.0 1.5 0.1 1.5 Output Saturation Voltage vs Load Current (Output High) TA = 125°C TA = 25°C 2.0 –300 3.0 VS = 5V, 0V 2.0 2.5 0 5 VCM = 0.5V TYPICAL PART 100 Input Bias Current vs Common Mode Voltage 2.5 TA = 85°C 3.0 Input Offset Voltage vs Input Common Mode Voltage 600345 G04 3.0 3.5 Input Offset Voltage vs Total Supply Voltage 150 TA = 125°C 4.0 600345 G02 Change in Input Offset Voltage vs Total Supply Voltage 100 4 INPUT OFFSET VOLTAGE (µV) 0 –600 VCM = 0.5V 4.5 10 600345 G08 VS = 5V, 0V INPUT OVERDRIVE = 30mV 0.1 TA = 125°C TA = –55°C 0.01 TA = 25°C 0.001 0.00001 0.001 0.1 SINKING LOAD CURRENT (mA) 10 600345 G09 600345f 8 LT6003/LT6004/LT6005 TYPICAL PERFORMANCE CHARACTERISTICS 90 80 70 60 OUTPUT HIGH 50 40 30 20 OUTPUT LOW 10 14 OUTPUT SHORT-CIRCUIT CURRENT (mA) VS = ±2.5V NO LOAD Output Short-Circuit Current vs Total Supply Voltage (Sinking) 14 VCM = 0.5V OUTPUT SHORTED TO V– 12 10 TA = 125°C 8 TA = 25°C 6 4 TA = –55°C 2 0 0 5 0 0 30 10 15 20 25 INPUT OVERDRIVE (mV) 2 3 1 4 TOTAL SUPPLY VOLTAGE (V) VCM = 0.5V OUTPUT SHORTED TO V+ 12 TA = 125°C 10 TA = 25°C 8 6 4 TA = –55°C 2 0 5 0 1 2 3 4 5 TOTAL SUPPLY VOLTAGE (V) 600345 G11 600345 G10 600345 G12 0.1Hz to 10Hz Voltage Noise Voltage Noise vs Frequency 450 0 1 2 3 4 5 6 7 TIME (SECONDS) 8 9 10 600345 G13 Current Noise vs Frequency 100 VS = 5V, 0V TA = 25°C 400 CURRENT NOISE (fA/√Hz) INPUT VOLTAGE NOISE (nV/√Hz) VS = ±2.5V TA = 25°C VOLTAGE NOISE (1µV/DIV) OUTPUT SATURATION VOLTAGE (mV) 100 Output Short-Circuit Current vs Total Supply Voltage (Sourcing) OUTPUT SHORT-CIRCIUT CURRENT (mA) Output Saturation Voltage vs Input Overdrive VCM = 4.5V 350 VCM = 2.5V 300 VS = 5V, 0V TA = 25°C VCM = 4.5V 10 VCM = 2.5V 250 200 1 1 10 FREQUENCY (Hz) 100 600345 G14 1 10 100 FREQUENCY (Hz) 1000 600345 G15 600345f 9 LT6003/LT6004/LT6005 TYPICAL PERFORMANCE CHARACTERISTICS Open-Loop Gain VS = 1.8V, 0V VCM = 0.5V TA = 25°C 40 CHANGE IN INPUT OFFSET VOLTAGE (µV) CHANGE IN INPUT OFFSET VOLTAGE (µV) Open-Loop Gain 40 RL = 1M 20 RL = 100k 0 RL = 20k –20 120 VS = 5V, 0V VCM = 0.5V TA = 25°C 30 RL = 100k CHANGE IN INPUT OFFSET VOLTAGE (µV) Open-Loop Gain 60 20 RL = 1M 10 0 RL = 20k –10 –20 –30 0 0.3 0.6 0.9 1.2 OUTPUT VOLTAGE (V) 1.5 1 0 1.8 80 RL = 20k 60 40 RL = 100k 20 RL = 1M 0 –20 –40 –60 –80 – 100 –40 –40 VS = ±8V TA = 25°C 100 2 3 4 OUTPUT VOLTAGE (V) 5 –8 –6 6 –4 –2 0 2 4 OUTPUT VOLTAGE (V) 600345 G17 8 600345 G18 600345 G16 Gain Bandwidth and Phase Margin vs Total Supply Voltage Slew Rate vs Temperature 60 55 45 40 5 4 GAIN 3 125°C 25°C 2 –55°C 1 0 0 2 f = 100Hz (GBW) VCM = HALF SUPPLY EXCEPT WHERE NOTED 4 6 8 10 12 14 TOTAL SUPPLY VOLTAGE (V) 16 600345 G19 VCM = 2.5V PHASE 2.0 1.5 RISING VS = 1.8V, 0V 40 RISING VS = 5V, 0V 1.0 0.5 0 –50 –25 FALLING VS = 1.8V, 0V 60 0 100 125 600345 G20 0 VCM = 2.5V 40 20 FALLING VS = 5V, 0V 25 75 0 50 TEMPERATURE (°C) 80 VCM = 4.5V –20 0.01 VS = 5V, 0V AV = –1 RF = RG = 1M VCM = 4.5V GAIN 0.1 1 FREQUENCY (kHz) 10 600345 G21 600345f 10 PHASE (DEG) 125°C, VCM = V+ – 0.5V 120 AV = –1 RF = RG = 1M 2.5 50 25°C PHASE MARGIN (DEG) GAIN BANDWIDTH (kHz) –55°C Gain and Phase vs Frequency GAIN (dB) 125°C SLEW RATE (V/ms) PHASE 3.0 LT6003/LT6004/LT6005 TYPICAL PERFORMANCE CHARACTERISTICS Capacitive Load Handling Overshoot vs Capacitive Load Common Mode Rejection Ratio vs Frequency 120 45 COMMON MODE REJECTION RATIO (dB) OVERSHOOT (%) VS = 1.8V, 0V 40 VCM = 0.5V RL = 1M 35 30 25 20 AV = 1 15 10 AV = 2 5 AV = 5 0 10 100 1000 CAPACITIVE LOAD (pF) VS = ±2.5V TA = 25°C 100 80 60 40 20 0 0.01 10000 0.1 1 FREQUENCY (kHz) 600345 G22 600345 G23 Power Supply Rejection Ratio vs Frequency Output Impedance vs Frequency VS = ±2.5V TA = 25°C 90 80 POSITIVE SUPPLY 70 60 50 100 OUTPUT IMPEDANCE (kΩ) POWER SUPPLY REJECTION RATIO (dB) 100 10 NEGATIVE SUPPLY 40 30 20 VS = ±2.5V TA = 25°C AV = 10 10 1 AV = 1 10 0 0.01 0.1 1 FREQUENCY (kHz) 10 0.1 0.01 0.1 1 FREQUENCY (kHz) 10 600345 G25 600345 G24 600345f 11 LT6003/LT6004/LT6005 TYPICAL PERFORMANCE CHARACTERISTICS Large-Signal Response Large-Signal Response 4.5V 1.5V 0.25V 0.5V AV = 1 VS = 5V, 0V CL = 100pF RL = 100k 1ms/DIV 600345 G26 AV = 1 VS = 1.8V, 0V CL = 100pF RL = 100k Small-Signal Response 1ms/DIV 600345 G27 Output Saturation Recovery VIN 200mV/DIV 2V/DIV VOUT AV = 1 VS = ±2.5V CL = 50pF RL = 1M 200µs/DIV 600345 G28 AV = –1 VS = ±2.5V RF = RG = 1M 5ms/DIV 600345 G29 600345f 12 LT6003/LT6004/LT6005 SIMPLIFIED SCHEMATIC V+ R5 R4 Q2 Q1 Q14 CM V+ R2 600k +IN Q3 Q4 Q5 Q6 C1 Q7 V+ Q11 Q10 R1 COMPLEMENTARY DRIVE GENERATOR D3 R3 600k Q12 OUT Q13 –IN Q16 Q17 Q8 Q9 R6 Q15 R7 600345 SS V– Figure 1 600345f 13 LT6003/LT6004/LT6005 APPLICATIONS INFORMATION Supply Voltage The positive supply of the LT6003/LT6004/LT6005 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. Rail-to-Rail Characteristics The LT6003/LT6004/LT6005 are fully functional for an input signal range from the negative supply to the positive supply. Figure 1 shows a simplified schematic of the amplifier. The input stage consists of two differential amplifiers, a PNP stage Q3/Q6 and an NPN stage Q4/ Q5 that are active over different ranges of the input common mode voltage. The PNP stage is active for common mode voltages, VCM, between the negative supply to approximately 0.9V below the positive supply. As VCM moves closer towards the positive supply, the transistor Q7 will steer Q2’s tail current to the current mirror Q8/Q9, activating the NPN differential pair. The PNP pair becomes inactive for the rest of the input common mode voltage range up to the positive supply. The second stage is a folded cascode and current mirror that converts the input stage differential signals into a single ended output. Capacitor C1 reduces the unity cross frequency and improves the frequency stability without degrading the gain bandwidth of the amplifier. The complementary drive generator supplies current to the output transistors that swing from rail to rail. Input Input bias current (IB) is minimized with cancellation circuitry on both input stages. The cancellation circuitry remains active when VCM is more than 300mV from either rail. As VCM approaches V– the cancellation circuitry turns off and IB is determined by the tail current of Q2 and the beta of the PNP input transistors. As VCM approaches V+ devices in the cancellation circuitry saturate causing IB to increase (in the nanoamp range). Input offset voltage errors due to IB can be minimized by equalizing the noninverting and inverting source impedances. The input offset voltage changes depending on which input stage is active; input offset voltage is trimmed on both input stages, and is guaranteed to be 500μV max in the PNP stage. By trimming the input offset voltage of both input stages, the input offset voltage shift over the entire common mode range (CMRR) is typically 160μV, maintaining the precision characteristics of the amplifier. The input stage of the LT6003/LT6004/LT6005 incorporates phase reversal protection to prevent wrong polarity outputs from occurring when the inputs are driven up to 9V below the negative rail. 600k protective resistors are included in the input leads so that current does not become excessive when the inputs are forced below V– or when a large differential signal is applied. Input current should be limited to 10mA when the inputs are driven above the positive rail. Output The output of the LT6003/LT6004/LT6005 is guaranteed to swing within 100mV of the positive rail and 50mV of the negative rail with no load, over the industrial temperature range. The LT6003/LT6004/LT6005 can typically source 8mA on a single 5V supply. Sourcing current is reduced to 5mA on a single 1.8V supply as noted in the electrical characteristics. However, when sourcing more than 250μA with an output load impedance greater than 20kΩ, a 1μF capacitor in series with a 2k resistor should be placed from the output to ground to insure stability. 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. 600345f 14 LT6003/LT6004/LT6005 APPLICATIONS INFORMATION Gain VS VS The open-loop gain is almost independent of load when the output is sourcing current. This optimizes performance in single supply applications where the load is returned to ground. The typical performance curve of Open-Loop Gain for various loads shows the details. Start-Up and Output Saturation Characteristics Micropower op amps are often not micropower during start-up or during output saturation. This can wreak havoc on limited current supplies, in the worst case there may not be enough supply current available to take the system up to nominal voltages. Unlike the LT6003/LT6004/LT6005, when the output saturates, some op amps may draw excessive current and pull down the supplies, compromising rail-to-rail performance. Figure 2 shows the start-up characteristics of the LT6003/LT6004/LT6005 for three limiting cases. The circuits are shown in Figure 3. One circuit creates a positive offset forcing the output to come up saturated high. Another circuit creates a negative offset forcing the output to come up saturated low, while the last circuit brings the output up at 1/2 supply. In all cases, the supply current is well controlled and is not excessive when the output is on either rail. SUPPLY CURRENT PER AMPLIFIER (µA) 1.2 TA = 25°C OUTPUT AT VS/2 1.0 OUTPUT HIGH 0.8 OUTPUT LOW 0.6 0.4 0.2 0 0 0.5 1 1.5 2 2.5 3 3.5 4 SUPPLY VOLTAGE (V) 4.5 5 30mV + + – 30mV – VS VS/2 + – 600345 F03 Output High Output Low Output at VS/2 Figure 3. Circuits for Start-Up Characteristics Adaptive Filter The circuit of Figure 4 shows the LT6005 applied as a micropower adaptive filter, which automatically adjusts the time constant depending on the signal level. Op amp A1 buffers the input onto the RC which has either a 1ms or 20ms time constant depending on the state of switch S1. The signal is then buffered to the output by op amp A2. Op amps A3 and A4 are configured as gain-of-40 difference amplifiers, gaining up the difference between the buffered input voltage and the output. When there is no difference, the outputs of A3 and A4 will be near zero. When a positive signal step is applied to the input, the output of A3 rises. When a negative signal step is applied to the input, the output of A4 rises. These voltages are fed to the LT6700-2 comparator which has a built in 400mV reference. If the input step exceeds 10mV, the output of the difference amplifiers will exceed 400mV and the comparator output (wired in OR gate fashion) falls low. This turns on S1, reducing the time constant and speeding up the settling. The overall effect is that the circuit provides “slow filtering” with “fast settling”. Waveforms are shown in the accompanying photo, for a 100mV input step. The fast 1ms time constant is obvious in the output waveform, while the slow time constant is discernible as the slow ramping sections. That the slow time constant is discernible at all is due to delay time in the difference amplifier and comparator functions. 600345 F02 Figure 2. Start-Up Characteristics 600345f 15 LT6003/LT6004/LT6005 APPLICATIONS INFORMATION 10M 10M VCC A3 1/4 LT6005 + VCC 10M –INB –INA VS GND VOUT 50mV/DIV 1M 10k S COMPOUT A B – S1 – + VIN 100mV/DIV OUTA VCC VIN 249k 10M LT6700-2 OUTB A1 1/4 LT6005 249k A4 1/4 LT6005 + 249k – – 249k A2 1/4 LT6005 200k COMPOUT 5V/DIV VOUT + 2ms/DIV 0.1µF 600345 F04b S1: FAIRCHILD FSA1157 VCC = 1.8V TO 5V ICC = 10µA, RISING TO 20µA WITH LARGE SIGNAL ADAPTIVE FILTER IMPROVES INHERENT TRADEOFF OF SETTLING TIME VS NOISE FILTERING. SMALL SIGNAL DC STEPS SETTLE WITH A 20ms TIME CONSTANT, FOR AN 8Hz NOISE BANDWIDTH. LARGE STEP SIGNALS (>10mV) CAUSE S1 TO TURN ON, SPEEDING UP THE TIME CONSTANT TO 1ms, FOR IMPROVED SETTLING. AS THE OUTPUT SETTLES BACK TO WITHIN 10mV, 51 TURNS OFF AGAIN, RESTORING THE 20ms TIME CONSTANT, FOR IMPROVED FILTERING. 600345 F04 Figure 4. Adaptive Filter VS R2 390k R1 1M VS LT1389-1.25 + – LT6003 ILOAD 600345 F05 VLOAD LOAD 1.25V ILOAD = R1 VS = VLOAD + 2V Figure 5. Precision 1.25µA Current Source 600345f 16 LT6003/LT6004/LT6005 PACKAGE DESCRIPTION DC Package 4-Lead Plastic DFN (2mm × 2mm) (Reference LTC DWG # 05-08-1724 Rev A) 1.30 ±0.05 2.00 ±0.05 1.35 ±0.05 1.00 ±0.05 PACKAGE OUTLINE 0.25 ± 0.05 0.45 BSC 1.35 REF RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDEDED R = 0.115 TYP 2.00 ±0.10 (4 SIDES) PIN 1 BAR TOP MARK (SEE NOTE 6) 0.40 ±0.05 1.35 ± 0.10 1.00 ± 0.10 4 PIN 1 NOTCH R = 0.20 OR 0.25 × 45° CHAMFER 1 0.70 ±0.05 0.75 ±0.05 0.200 REF R = 0.05 TYP 0.23 ± 0.05 0.45 BSC 1.35 REF BOTTOM VIEW—EXPOSED PAD (DC4) DFN 0506 REV A NOTE: 1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 0.00 – 0.05 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 S5 Package 5-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1635) 0.62 MAX 0.95 REF 2.90 BSC (NOTE 4) 1.22 REF 1.4 MIN 3.85 MAX 2.62 REF 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.30 – 0.45 TYP 5 PLCS (NOTE 3) 0.95 BSC 0.80 – 0.90 0.20 BSC 0.01 – 0.10 1.00 MAX DATUM ‘A’ 0.30 – 0.50 REF NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 0.09 – 0.20 (NOTE 3) 1.90 BSC S5 TSOT-23 0302 REV B 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 600345f 17 LT6003/LT6004/LT6005 PACKAGE DESCRIPTION DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1698) 0.675 ±0.05 3.5 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) PACKAGE OUTLINE 0.25 ± 0.05 0.50 BSC 2.38 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS R = 0.115 TYP 5 3.00 ±0.10 (4 SIDES) 0.38 ± 0.10 8 1.65 ± 0.10 (2 SIDES) PIN 1 TOP MARK (NOTE 6) (DD) DFN 1203 4 0.25 ± 0.05 0.75 ±0.05 0.200 REF 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. 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) 3.00 ± 0.102 (.118 ± .004) (NOTE 3) 0.889 ± 0.127 (.035 ± .005) 5.23 (.206) MIN 3.20 – 3.45 (.126 – .136) 0.254 (.010) 8 7 6 5 3.00 ± 0.102 (.118 ± .004) (NOTE 4) 4.90 ± 0.152 (.193 ± .006) DETAIL “A” 0.52 (.0205) REF 0° – 6° TYP GAUGE PLANE 0.42 ± 0.038 (.0165 ± .0015) TYP 0.65 (.0256) BSC 1 0.53 ± 0.152 (.021 ± .006) RECOMMENDED SOLDER PAD LAYOUT 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 0.127 ± 0.076 (.005 ± .003) MSOP (MS8) 0204 600345f 18 LT6003/LT6004/LT6005 PACKAGE DESCRIPTION DHC Package 16-Lead Plastic DFN (5mm × 3mm) (Reference LTC DWG # 05-08-1706) R = 0.115 TYP 5.00 ±0.10 (2 SIDES) R = 0.20 TYP 0.65 ±0.05 9 0.40 ± 0.10 16 3.00 ±0.10 (2 SIDES) 3.50 ±0.05 1.65 ±0.05 (2 SIDES) 2.20 ±0.05 1.65 ± 0.10 (2 SIDES) PACKAGE OUTLINE PIN 1 TOP MARK (SEE NOTE 6) PIN 1 NOTCH (DHC16) DFN 1103 8 0.25 ± 0.05 0.50 BSC 1 0.25 ± 0.05 0.50 BSC 0.75 ±0.05 0.200 REF 4.40 ±0.05 (2 SIDES) 4.40 ±0.10 (2 SIDES) 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 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 GN Package 16-Lead Plastic SSOP (Narrow .150 Inch) (Reference LTC DWG # 05-08-1641) .189 – .196* (4.801 – 4.978) .015 ± .004 × 45° (0.38 ± 0.10) .007 – .0098 (0.178 – 0.249) .016 – .050 (0.406 – 1.270) NOTE: 1. CONTROLLING DIMENSION: INCHES INCHES 2. DIMENSIONS ARE IN (MILLIMETERS) 0° – 8° TYP .0532 – .0688 (1.35 – 1.75) .008 – .012 (0.203 – 0.305) TYP .004 – .0098 (0.102 – 0.249) .0250 (0.635) BSC 16 15 14 13 12 11 10 9 .229 – .244 (5.817 – 6.198) 3. DRAWING NOT TO SCALE *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE .009 (0.229) REF .150 – .157** (3.810 – 3.988) 1 2 3 4 5 6 7 8 .045 ±.005 .254 MIN .0165 ± .0015 .150 – .165 .0250 BSC RECOMMENDED SOLDER PAD LAYOUT GN16 (SSOP) 0204 600345f 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. 19 LT6003/LT6004/LT6005 TYPICAL APPLICATION Gain of –50 Ultra Low Power Precision Gas Sensor Amplifier 20k 976k* 1M 1% VS+ 1M 1% – – A1 1/2 LT6004 CITY TECHNOLOGY MODEL 40X(2) OXYGEN SENSOR BURNS 100µA IN AIR 20k (~21% O2) A S3 B – A N 100Ω S2 + B + 1M 1% B VS– S1 VOUT = 500mV IN AIR (DURING READ PHASE) N 1M 1% C1 0.1µF X7R N OXYGEN SENSOR A2 1/2 LT6004 + A VS+ NULL READ VS– GAIN = –50 VOS = 5µV TYPICAL (INPUT REFERRED), AVERAGED ISUPPLY = 3µA VSUPPLY = ±0.9V TO ±2.7V S1, S2: FAIRCHILD FSA1157 (NC) S3: FAIRCHILD FSA1156 (NO) CONNECT SWITCH GND PINS TO VS– *20M FOR AV = 1000 S1, S2 ARE NORMALLY CLOSED (N = LOW). S3 IS NORMALLY OPEN (N = LOW). A1's OUTPUT OFFSET IS STORED ON C1. WHEN A READING IS DESIRED, SWITCHES REVERSE STATE, AND A2 ACTS AS A DIFFERENCE AMPLIFIER FROM THE STORED OFFSET. NULL PHASE SHOULD BE ASSERTED 200ms OR MORE. A2 SETTLES 50ms AFTER READ PHASE IS ASSERTED, WITH WORST CASE ROOM TEMPERATURE DROOP RATE IS 0.8µV/ms DOMINATED BY ANALOG SWITCH LEAKAGE CURRENT. 600345 TA02 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS ® LT1490A/LT1491A 50µA Dual/Quad Over-The-Top Rail-to-Rail Input and Output Op Amps 950µV VOS(MAX), Gain Bandwidth = 200kHz LT1494/LT1495/ LT1496 1.5µA Max Single/Dual/Quad Over-The-Top Precision Rail-to-Rail Input and Output Op Amps 375µV VOS(MAX), Gain Bandwidth = 2.7kHz LT1672/LT1673/ LT1674 2µA Max, AV ≥ 5, Single/Dual/Quad Over-The-Top Precision Rail-to-Rail Input and Output Op Amps Gain of 5 Stable, Gain Bandwidth = 12kHz LT1782 Micropower, Over-The-Top, SOT-23, Rail-to-Rail Input and Output Op Amps SOT-23, 800µV VOS(MAX), IS = 55µA(MAX), Gain Bandwidth = 200kHz, Shutdown Pin LT2178/LT2179 17µA Dual/Quad Single Supply Op Amps 120µV VOS(MAX), Gain Bandwidth = 60kHz LT6000/LT6001/ LT6002 1.8V, 16µA Max Single/Dual/Quad Precision Rail-to-Rail Op Amps 600µV VOS(MAX), Gain Bandwidth = 50kHz, Shutdown Over-The-Top is a registered trademark of Linear Technology Corporation. 600345f 20 Linear Technology Corporation LT 0906 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2006