LT6000/LT6001/LT6002 Single, Dual and Quad, 1.8V, 13µA Precision Rail-to-Rail Op Amps U FEATURES DESCRIPTIO ■ The LT®6000/LT6001/LT6002 are single, dual and quad precision rail-to-rail input and output operational amplifiers. Designed to maximize battery life in always-on applications, the devices will operate on supplies down to 1.8V while drawing only 13µA quiescient current. The low supply current and low voltage operation is combined with precision specifications; input offset is guaranteed less than 600µV. The performance on 1.8V supplies is fully specified and guaranteed over temperature. A shutdown feature available in the LT6000 and the 10-lead dual LT6001 version can be used to extend battery life by allowing the amplifiers to be switched off during periods of inactivity. ■ ■ ■ ■ ■ Ideal for Battery-Powered Applications – Low Voltage: 1.8V to 16V Operation – Low Current: 16µA/Amplifier Max – Small Packages: DFN, MSOP, SSOP – Shutdown to 1.5µA Max (LT6000, LT6001DD) Low Offset Voltage: 600µV Max Rail-to-Rail Input and Output Fully Specified on 1.8V and 5V Supplies Operating Temperature Range: –40°C to 85°C Single Available in DFN Dual Available in MSOP and DFN Quad Available in SSOP and DFN U APPLICATIO S ■ ■ ■ ■ ■ The LT6000 is available in a tiny, dual fine pitch leadless DFN package. The LT6001 is available in the 8-pin MSOP package; a 10-lead version with the shutdown feature is available in DFN package. The quad LT6002 is available in the 16-pin SSOP package and the 16-pin DFN package. These devices are specified over the commercial and industrial temperature range. Gas Sensing Portable Instrumentation Battery- or Solar-Powered Systems Low Voltage Signal Processing Micropower Active Filters , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. U TYPICAL APPLICATIO Micropower Oxygen Sensor OXYGEN SENSOR CITY TECHNOLOGY 40X(2) 25 – 330Ω 1/2 LT6001 + + VOUT = 1V IN AIR, 0V WITHOUT OXYGEN 330Ω +VE www.citytech.com – VS – VS 200k 1/2 LT6001 + VS = 1.8V ISUPPLY = 145µA IN AIR, 45µA WITHOUT OXYGEN SUPPLY CURRENT PER AMPLIFIER (µA) 10k 100Ω –VE Start-Up Characteristics Supply Current vs Supply Voltage AV = 1 VCM = 0.5V 20 TA = 125°C 15 TA = 25°C 10 TA = –55°C 5 0 0.4 0.6 20k 60012 TA01a 0.8 1.0 1.2 1.4 1.6 1.8 TOTAL SUPPLY VOLTAGE (V) 2.0 60012 TA01b 600012fa 1 LT6000/LT6001/LT6002 W W U W ABSOLUTE AXI U RATI GS (Note 1) Total Supply Voltage (V+ to V–) .............................. 18V Input Current ..................................................... ±10mA SHDN Pin Voltage (Note 7) ............................... V– to V+ Output Short Current Duration (Note 2) ......... Indefinite Operating Temperature Range (Note 3) ... –40°C to 85°C Specified Temperature Range (Note 4) .... –40°C to 85°C Junction Temperature ........................................... 150°C Junction Temperature (DFN Packages) ................ 125°C Storage Temperature Range .................. –65°C to 150°C Storage Temperature Range DFN Packages ................................... –65°C to 125°C Lead Temperature (Soldering, 10 sec) MSOP, SSOP Packages .................................... 300°C U U W PACKAGE/ORDER I FOR ATIO TOP VIEW TOP VIEW OUT A IN– A IN+ A V– 5 V– 7 –IN 2 4 OUT +IN 3 1 2 3 4 IN– A 2 8 V+ – + – + 8 IN– B 11 V– 4 7 IN+ B NC 5 6 SHDN DD PACKAGE 10-LEAD (3mm ´ 3mm) PLASTIC DFN TJMAX = 150°C, θJA = 250°C/W TJMAX = 125°C, θJA = 160°C/W (NOTE 2) 9 OUT B IN+ A 3 7 OUT B 6 IN– B 5 IN+ B MS8 PACKAGE 8-LEAD PLASTIC MSOP DCB PACKAGE 6-LEAD (2mm × 3mm) PLASTIC DFN 10 V+ OUT A 1 TOP VIEW 6 V+ SHDN 1 TJMAX = 125°C, θJA = 160°C/W (NOTE 2) EXPOSED PAD (PIN 7) IS CONNECTED TO V– (PIN 5) EXPOSED PAD (PIN 11) IS CONNECTED TO V– (PIN 4) ORDER PART NUMBER DCB PART MARKING* ORDER PART NUMBER LT6000CDCB LT6000IDCB LCDM LCDM LT6001CMS8 LT6001IMS8 MS8 PART MARKING* ORDER PART NUMBER DD PART MARKING* LT6001CDD LT6001IDD LBVH LBVH LTBVD LTBVD TOP VIEW TOP VIEW OUT A 1 IN– A 2 IN+ A 3 V+ 4 IN+ B 5 IN– B 6 OUT B 7 10 OUT C NC 8 9 16 OUT D – +A – – 15 IN D D+ 14 IN+ D 13 V – + –B + + 12 IN C C– 11 IN– C NC OUT A 1 IN– A 2 IN+ A 3 V+ 4 + 5 IN B IN– 16 OUT D A D 15 IN– D 14 IN+ D 13 V – 17 12 IN+ C B C 11 IN– C B 6 OUT B 7 10 OUT C NC 8 9 NC DHC PACKAGE 16-LEAD (5mm ´ 3mm) DFN GN PACKAGE 16-LEAD NARROW PLASTIC SSOP TJMAX = 125°C, θJA = 160°C/W (NOTE 2) TJMAX = 150°C, θJA = 135°C/W EXPOSED PAD (PIN 17) IS CONNECTED TO V– (PIN 13) ORDER PART NUMBER GN PART MARKING ORDER PART NUMBER DHC PART MARKING* LT6002CGN LT6002IGN 6002 6002I LT6002CDHC LT6002IDHC 6002 6002 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/ *Temperature grades are identified on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. 600012fa 2 LT6000/LT6001/LT6002 ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full specified temperature range, otherwise specifications are TA = 25°C. VS = 1.8V, 0V, VCM = VOUT = 0.5V. For the LT6000 and the LT6001DD, VSHDN = V+, unless otherwise noted. SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS LT6001MS8 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C LT6000DCB, LT6001DD, LT6002GN 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C LT6002DHC 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C VCM = V+ LT6001MS8 MIN TYP 200 MAX 600 800 950 750 1000 1200 900 1100 1300 UNITS µV µV µV µV µV µV µV µV µV 400 1000 1300 µV µV 500 1200 1550 µV µV 500 1300 1700 5 µV µV µV/°C nA nA nA nA nA nA µVP-P nV/√Hz fA/√Hz GΩ MΩ pF dB dB dB V dB ● ● 250 ● ● 300 ● ● ● VCM = V+ LT6000DCB, LT6001DD, LT6002GN ● VCM = V+ LT6002DHC ● ∆VOS/∆T IB Input Offset Voltage Drift (Note 5) Input Bias Current IOS Input Offset Current en in RIN Input Noise Voltage Input Voltage Noise Density Input Current Noise Density Input Resistance CIN CMRR Input Capacitance Common Mode Rejection Ratio PSRR Input Voltage Range Power Supply Rejection Ratio AVOL Minimum Supply Large-Signal Gain VOL VOH Output Swing Low (Note 6) Output Swing High (Note 6) VCM = 0.5V VCM = 0.5V VCM = V– VCM = V+ VCM = 0.5V VCM = V– VCM = V+ 0.1Hz to 10Hz f = 1kHz f = 1kHz Common Mode (VCM = 0V to 0.6V) Differential ● VCM = 0V to 0.6V, 0°C ≤ TA ≤ 70°C VCM = 0.1V to 0.6V, –40°C ≤ TA ≤ 85°C VCM = 0V to 1.8V ● ● ● ● ● ● ● ● ● 10 ● 82 82 60 0 86 ● 1.8 ● VS = 1.8V to 16V VCM = VO = 0.5V VCM = VO = 0.5V VO = 0.25V to 1.25V RL = 100k to GND RL = 100k to GND RL = 10k to GND RL = 10k to GND Input Overdrive = 30mV No Load ISINK = 100µA Input Overdrive = 30mV No Load ISOURCE = 100µA RL = 10k to GND –5 –5 ● ● 25 20 40 25 2 –2 –2 4 0.2 0.2 0.4 1.2 75 25 3.5 25 5 96 96 78 10 1 1 2 1.8 100 V 65 V/mV V/mV V/mV V/mV 125 ● ● 30 120 60 200 mV mV ● ● ● 30 140 160 60 225 250 mV mV mV 600012fa 3 LT6000/LT6001/LT6002 ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full specified temperature range, otherwise specifications are TA = 25°C. VS = 1.8V, 0V, VCM = VOUT = 0.5V. For the LT6000 and the LT6001DD, VSHDN = V+, unless otherwise noted. SYMBOL ISC PARAMETER Short-Circuit Current IS Supply Current per Amplifier ISHDN Total Supply Current in Shutdown (Note 7) SHDN Pin Current (Note 7) VL VH tON Shutdown Output Leakage Current (Note 7) SHDN Pin Input Low Voltage (Note 7) SHDN Pin Input High Voltage (Note 7) Turn On Time (Note 7) tOFF Turn Off Time (Note 7) GBW Gain Bandwidth Product (Note 8) SR FPBW Slew Rate Full Power Bandwidth (Note 9) CONDITIONS Short to GND 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C Short to V+ 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C VSHDN = 0.3V VSHDN = 1.8V VSHDN = 0V VSHDN = 0.3V (V– ≤ VOUT ≤ V+) ● ● ● ● MIN 2 1 0.4 0.7 0.4 0.15 TYP 4 400 UNITS mA mA mA mA mA mA µA µA µA µA nA nA nA V V µs 100 µs 50 kHz kHz kHz V/ms V/ms V/ms kHz 2 13 ● ● ● ● ● –300 ● 0.8 0 –200 20 ● ● VSHDN = 0V to 1.8V, RL = 10k VSHDN = 1.8V to 0V, RL = 10k Freq = 1kHz 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C AV = –1, VOUT = 0.25V to 1.5V Measure 0.5V to 1.25V, 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C VOUT = 1.25VP-P ● ● ● ● MAX 16 22 24 1.5 30 0.3 1.5V 32 28 24 9 7 5 2.3 15 3.8 600012fa 4 LT6000/LT6001/LT6002 ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full specified temperature range, otherwise specifications are TA = 25°C. VS = 5V, 0V, VCM = VOUT = 1/2 Supply. For the LT6000 and the LT6001DD, VSHDN = V+, unless otherwise noted. SYMBOL PARAMETER CONDITIONS VOS Input Offset Voltage LT6001MS8 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C LT6000DCB, LT6001DD, LT6002GN 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C LT6002DHC 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C VCM = V+ LT6001MS8 MIN TYP MAX UNITS 200 600 800 950 750 1000 1200 900 1100 1300 µV µV µV µV µV µV µV µV µV 400 1000 1300 µV µV 500 1200 1550 µV µV 500 1300 1700 5 µV µV µV/°C ● ● 250 ● ● 300 ● ● ● VCM = V+ LT6000DCB, LT6001DD, LT6002GN ● VCM = V+ LT6002DHC ● ∆VOS/∆T Input Offset Voltage Drift (Note 5) VCM = VS/2 ● IB Input Bias Current VCM = VS/2 VCM = V– VCM = V+ ● ● ● Input Offset Current VCM = VS/2 VCM = V– VCM = V+ ● ● ● Input Noise Voltage 0.1Hz to 10Hz IOS 2 –6 –6 –2 –2 4 12 nA nA nA 0.2 0.2 0.4 1.2 1.2 2.4 nA nA nA 1.2 µVP-P en Input Voltage Noise Density f = 1kHz 75 nV/√Hz in Input Current Noise Density f = 1kHz 25 fA/√Hz RIN Input Resistance Common Mode (VCM = 0V to 3.8V) Differential 3.5 25 GΩ MΩ 5 pF 105 105 86 dB dB dB CIN Input Capacitance CMRR Common Mode Rejection Ratio VCM = 0V to 3.8V, 0°C ≤ TA ≤ 70°C VCM = 0.1V to 3.8V, –40°C ≤ TA ≤ 85°C VCM = 0V to 5V Input Voltage Range PSRR Power Supply Rejection Ratio VS = 1.8V to 16V VCM = VO = 0.5V Minimum Supply AVOL VOL Large-Signal Gain Output Swing Low (Note 6) VO = 0.5V to 4.5V RL = 100k to VS/2 RL = 100k to VS/2 RL = 10k to VS/2 RL = 10k to VS/2 RL = 10k to GND RL = 10k to GND Input Overdrive = 30mV No Load ISINK = 100µA ISINK = 500µA ● 8.5 ● ● ● 90 90 68 ● 0 ● 86 ● 1.8 ● ● ● ● ● ● 30 25 16 10 160 80 5 100 V dB V 60 V/mV V/mV V/mV V/mV V/mV V/mV 25 1000 30 120 180 60 200 300 mV mV mV 600012fa 5 LT6000/LT6001/LT6002 ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full specified temperature range, otherwise specifications are TA = 25°C. VS = 5V, 0V, VCM = VOUT = 1/2 Supply. For the LT6000 and the LT6001DD, VSHDN = V+, unless otherwise noted. SYMBOL PARAMETER CONDITIONS VOH Output Swing High (Note 6) Input Overdrive = 30mV No Load ISOURCE = 100µA RL = 10k to GND ● ● ● Short to GND 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C 5 4 3 10 ● ● mA mA mA Short to V+ 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C 3.5 2.5 1.5 7.5 ● ● mA mA mA 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C ● ● ISC IS Short-Circuit Current Supply Current per Amplifier MIN VS = ±8V ISHDN TYP MAX UNITS 30 140 160 60 225 400 mV mV mV 15 18 24 27 µA µA µA 20 25 34 µA µA ● Total Supply Current in Shutdown (Note 7) VSHDN = 0.3V ● 3 5 µA SHDN Pin Current (Note 7) VSHDN = 5V VSHDN = 0V ● ● 0 –650 30 nA nA Shutdown Output Leakage Current (Note 7) VSHDN = 0.3V (V– ≤ VOUT ≤ V+) ● –1000 20 nA VL SHDN Pin Input Low Voltage (Note 7) ● VH SHDN Pin Input High Voltage (Note 7) ● tON Turn On Time (Note 7) VSHDN = 0V to 5V, RL = 10k 400 µs tOFF Turn Off Time (Note 7) VSHDN = 5V to 0V, RL = 10k 100 µs GBW Gain Bandwidth Product Freq = 1kHz 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C 40 35 30 60 ● ● kHz kHz kHz AV = –1, VOUT = 0.5V to 4.5V Measure 1V to 4V, 0°C ≤ TA ≤ 70°C –40°C ≤ TA ≤ 85°C 11 8 6 18 ● ● V/ms V/ms V/ms 0.87 1.4 kHz SR FPBW Slew Rate Full Power Bandwidth (Note 9) VOUT = 4VP-P 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 the absolute maximum. This depends on the power supply voltage and how many amplifiers are shorted. The θJA specified for the 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 LT6000C/LT6000I/LT6001C/LT6001I and LT6002C/LT6002I are guaranteed functional over the temperature range of –40°C to 85°C. Note 4: The LT6000C/LT6001C/LT6002C is guaranteed to meet specified performance from 0°C to 70°C. The LT6000C/LT6001C/LT6002C are designed, characterized and expected to meet specified performance from 0.3 V 4.7 V –40°C to 85°C but are not tested or QA sampled at these temperatures. The LT6000I/LT6001I/ LT6002I is guaranteed to meet specified performance from –40°C to 85°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: Specifications apply to the LT6000 or the LT6001DD with shutdown. Note 8: Guaranteed by correlation to slew rate at VS = 1.8V and GBW at VS = 5V. Note 9: Full-power bandwidth is calculated from the slew rate: FPBW = SR/πVP-P. 600012fa 6 LT6000/LT6001/LT6002 U W TYPICAL PERFOR A CE CHARACTERISTICS VOS Distribution VS = 5V, 0V VCM = 2.5V MS8 PACKAGE PERCENT OF UNITS (%) 25 PERCENT OF UNITS (%) TC VOS Distribution Supply Current vs Supply Voltage 20 20 15 10 35 VS = 5V, 0V 18 VCM = 2.5V MS8, GN16, 16 DD10 PACKAGES 14 –40°C TO 85°C SUPPLY CURRENT PER AMPLIFIER (µA) 30 12 10 8 6 4 5 2 0 –600 0 400 –400 –200 0 200 INPUT OFFSET VOLTAGE (µV) 600 –5 –4 –3 –2 –1 0 1 2 3 DISTRIBUTION (µV/°C) 4 Change in Input Offset Voltage vs Total Supply Voltage 150 TA = 25°C TA = 125°C 100 TA = 25°C 0 –100 TA = 25°C 0 TA = 125°C 5.0 TA = 25°C TA = –55°C –2.5 –5.0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 COMMON MODE VOLTAGE (V) 60012 G07 TA = –55°C –200 2 4 6 8 10 12 14 TOTAL SUPPLY VOLTAGE (V) 16 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 INPUT COMMON MODE VOLTAGE (V) 18 Output Saturation Voltage vs Load Current (Output Low) 1.0 VS = 5V, 0V INPUT OVERDRIVE = 30mV TA = 25°C TA = 125°C 0.1 TA = –55°C 0.01 0.001 0.01 0.1 1 SOURCING LOAD CURRENT (mA) 5 60012 G06 OUTPUT LOW SATURATION VOLTAGE (V) OUTPUT HIGH SATURATION VOLTAGE (V) INPUT BIAS CURRENT (nA) TA = 125°C 100 600012 G05 1.0 7.5 0 200 Output Saturation Voltage vs Load Current (Output High) 10.0 18 VS = 5V, 0V TYPICAL PART –100 0 Input Bias Current vs Common Mode Voltage 2.5 400 –300 3 VS = 5V, 0V 16 TA = –55°C 60012 G35 12.5 4 6 8 10 12 14 TOTAL SUPPLY VOLTAGE (V) 600012 G03 –100 2 1.5 2.5 TOTAL SUPPLY VOLTAGE (V) 2 Input Offset Voltage vs Input Common Mode Voltage TA = 125°C TA = –55°C 1 TA = –55°C 5 300 200 –50 –100 10 0 OFFSET VOLTAGE (µV) 200 0 TA = 25°C 15 0 5 VCM = 0.5V TYPICAL PART 300 OFFSET VOLTAGE (µV) CHANGE IN OFFSET VOLTAGE (µV) 400 250 50 20 Input Offset Voltage vs Total Supply Voltage VCM = 0.5V 100 TA = 125°C 25 20012 G02 60012 G01 300 VCM = 0.5V 30 10 60012 G08 VS = 5V, 0V INPUT OVERDRIVE = 30mV TA = 25°C TA = 125°C 0.1 0.01 0.001 TA = –55°C 0.01 0.1 1 SINKING LOAD CURRENT (mA) 10 60012 G08 600012fa 7 LT6000/LT6001/LT6002 U W TYPICAL PERFOR A CE CHARACTERISTICS Output Saturation Voltage vs Input Overdrive 90 80 70 60 50 40 OUTPUT HIGH 30 OUTPUT LOW 20 10 14 0 10 VCM = 0.5V OUTPUT SHORTED TO V– 12 TA = 25°C 10 TA = 125°C 8 TA = –55°C 6 4 2 1 30 15 20 25 10 INPUT OVERDRIVE (mV) 2 3 TA = 25°C 4 TA = –55°C 2 0.1Hz to 10Hz Output Voltage Noise VS = 5V, 0V TA = 25°C 90 VCM = 4.5V 80 VCM = 2.5V 70 4 5 6 7 TIME (SECONDS) 8 9 50 10 20 RL = 10k RL = 100k –40 0.3 0.6 0.9 1.2 OUTPUT VOLTAGE (V) 1.5 1.8 60012 G16 10 100 FREQUENCY (Hz) 1000 60012 G15 Open-Loop Gain 200 40 CHANGE IN INPUT OFFSET VOLTAGE (µV) 40 0 1 Open-Loop Gain VS = 1.8V, 0V VCM = 0.5V TA = 25°C –20 VCM = 2.5V 60012 G14 Open-Loop Gain 60 VCM = 4.5V 100 1000 60012 G13 0 VS = 5V, 0V TA = 25°C 10 10 100 FREQUENCY (Hz) 1 VS = 5V, 0V VCM = 2.5V TA = 25°C CHANGE IN INPUT OFFSET VOLTAGE (µV) 3 20 RL = 10k 0 RL = 100k –20 –40 5 Input Noise Current vs Frequency INPUT NOISE CURRENT DENSITY (fA/√Hz) NOISE VOLTAGE (nV/√Hz) NOISE VOLTAGE (500nV/DIV) 2 3 2 4 TOTAL SUPPLY VOLTAGE (V) 1000 60 1 1 60012 G12 Noise Voltage Density vs Frequency 100 VS = ±2.5V 0 0 60012 G11 60012 G10 CHANGE IN INPUT OFFSET VOLTAGE (µV) TA = 125°C 6 5 4 TOTAL SUPPLY VOLTAGE (V) VCM = 0.5V OUTPUT SHORTED TO V+ 8 0 5 0 –60 OUTPUT SHORT-CIRCIUT CURRENT (mA) VS = 5V, 0V NO LOAD OUTPUT SHORT-CIRCUIT CURRENT (mA) OUTPUT SATURATION VOLTAGE (mV) 100 Output Short-Circuit Current vs Total Supply Voltage (Sinking) Output Short-Circuit Current vs Total Supply Voltage (Sourcing) 0 1 3 4 2 OUTPUT VOLTAGE (V) 5 60012 G17 VS = ±2.5V TA = 25°C 150 100 RL = 10k 50 0 RL = 100k –50 –100 –150 – 200 –2.5 –2 –1.5 –1 –0.5 0 0.5 1 1.5 OUTPUT VOLTAGE (V) 2 2.5 20012 G18 600012fa 8 LT6000/LT6001/LT6002 U W TYPICAL PERFOR A CE CHARACTERISTICS Gain Bandwidth and Phase Margin vs Temperature 80 VS = 5V, 0V 70 VCM = 2.5V 60 50 VS = 1.8V, 0V 40 VCM = 0.5V 30 GAIN BANDWIDTH 20 10 75 100 0 50 –50 –25 25 TEMPERATURE (°C) AV = –1 RF = RG = 100k 30 25 120 60 50 RISING VS = 5V, 0V FALLING VS = 1.8V, 0V 15 30 40 VCM = 2.5V 20 125 10 0 –20 GAIN –10 50 25 75 0 TEMPERATURE (°C) 100 125 –30 0.1 1 –60 60012 G19 Capacitive Load Handling Overshoot vs Capacitive Load 55 GAIN BANDWIDTH (kHz) 50 80 45 40 70 GAIN BANDWIDTH 60 100 COMMON MODE REJECTION RATIO (dB) 60 PHASE MARGIN 35 30 25 20 AV = 1 15 50 10 40 5 AV = 5 AV = 2 0 30 0 2 6 4 8 10 12 14 16 TOTAL SUPPLY VOLTAGE (V) 100 1000 CAPACITIVE LOAD (pF) 10 18 10000 90 30 NEGATIVE SUPPLY 40 1000 VS = ±2.5V TA = 25°C AV = 10 100 AV = 1 10 1 10 1 10 FREQUENCY (kHz) 50 100 60012 G25 1 10 FREQUENCY (kHz) 0.1 0.01 0.1 1 10 FREQUENCY (kHz) 100 60012 G24 OUTPUT IMPEDANCE (kΩ) OUTPUT IMPEDANCE (Ω) POSITIVE SUPPLY 0.1 60 Disabled Output Impedance vs Frequency (LT6000/LT6001DD) 1000 50 –10 0.01 70 Output Impedance vs Frequency VS = ±2.5V TA = 25°C 70 80 60012 G23 Power Supply Rejection Ratio vs Frequency 110 VS = ±2.5V TA = 25°C 90 30 0.1 10000 600012 G36 COMMON MODE REJECTION RATIO (dB) Common Mode Rejection Ratio vs Frequency 50 VS = 5V, 0V 45 VCM = 2.5V OVERSHOOT (%) 65 PHASE MARGIN (DEG) 70 –80 1000 10 100 FREQUENCY (kHz) 60012 G22 RF = RG = 100k AV = –1 f = 1kHz –40 VS = 5V, 0V RF = RG = 100k AV = –1 60012 G21 Gain Bandwidth and Phase Margin vs Supply Voltage 20 VCM = 4.5V –20 5 –50 –25 60 VCM = 4.5V 0 FALLING VS = 5V, 0V 10 80 VCM = 2.5V 40 RISING VS = 1.8V, 0V 20 100 PHASE PHASE (DEG) VS = 5V, 0V VCM = 2.5V 70 GAIN (dB) VS = 1.8V, 0V VCM = 0.5V 35 SLEW RATE (V/ms) PHASE MARGIN PHASE MARGIN (DEG) f = 1kHz GAIN BANDWIDTH (kHz) Gain and Phase vs Frequency Slew Rate vs Temperature 80 75 70 65 60 55 50 45 100 60012 G26 VS = ±2.5V VPIN6(SHDN) = –2.5V 100 10 1 0 0.01 0.1 1 10 FREQUENCY (kHz) 100 60012 G27 600012fa 9 LT6000/LT6001/LT6002 U W TYPICAL PERFOR A CE CHARACTERISTICS Large-Signal Response Large-Signal Response Small-Signal Response 4.5V 1.5V 20mV/DIV 0.25V 0.5V AV = 1 VS = 5V, 0V CL = 100pF RL = 10k 60012 G28 100µs/DIV AV = 1 VS = 1.8V, 0V CL = 100pF RL = 10k SUPPLY CURRENT BOTH AMPLIFIERS (µA) TA = 125°C 40 30 TA = 25°C TA = –55°C 20 10 SUPPLY CURRENT BOTH AMPLIFIERS (µA) 60 VS = 1.8V, 0V AV = 1 VS = ±2.5V CL = 100pF RL = 100k Total Supply Current vs SHDN Pin Voltage (LT6001DD) Total Supply Current vs SHDN Pin Voltage (LT6001DD) 50 60012 G29 100µs/DIV Shutdown Response (LT6000/LT6001DD) TA = 125°C VSHDN 40 TA = 25°C 0V TA = –55°C VOUT 30 20 0V 10 0 –5 –4 –3 –2 –1 0 1 2 3 SHDN PIN VOLTAGE (V) 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 SHDN PIN VOLTAGE (V) 5 500µs/DIV 60012 G33 Supply Current vs SHDN Pin Voltage (LT6000) Supply Current vs SHDN Pin Voltage (LT6000) 30 VS = 1.8V, 0V VS = ±5V TA = 125°C 25 25 TA = 125°C SUPPLY CURRENT (µA) SUPPLY CURRENT (µA) 4 VIN = 1V AV = 1 VS = 1.8V, 0V RL = 100k 60012 G32 60012 G31 30 60012 G30 VS = ±5V 50 0 0 10µs/DIV 20 TA = 25°C 15 10 TA = –55°C 20 TA = 25°C 15 TA = –55°C 10 5 5 0 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 SHDN PIN VOLTAGE (V) 60012 G37 –5 –4 –3 –2 –1 0 1 2 3 SHDN PIN VOLTAGE (V) 4 5 60012 G34 600012fa 10 LT6000/LT6001/LT6002 W W SI PLIFIED SCHE ATIC V+ R4 Q17 Q16 R5 Q2 Q1 Q14 R8 7M CM Q10 R1 Q11 V+ V– Q7 R2 30k IN+ SHDN Q3 Q4 Q5 C1 Q6 COMPLEMENTARY DRIVE GENERATOR + V IN– Q18 Q19 R3 D3 30k Q12 Q20 Q8 Q9 R6 Q13 OUT V– Q15 R7 V– Figure 1 U W U U APPLICATIO S I FOR ATIO Supply Voltage The positive supply of the LT6000/LT6001/LT6002 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 LT6000/LT6001/LT6002 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 1V 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 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 The input bias current depends on which stage is active. The input bias current polarity depends on the input common mode voltage. When the PNP stage is active, the input bias currents flow out of the input pins. They flow in the opposite direction when the NPN stage is active. The offset error due to the input bias currents can be minimized by equalizing the noninverting and inverting source impedance. 600012fa 11 LT6000/LT6001/LT6002 U W U U APPLICATIO S I FOR ATIO Start-Up and Output Saturation Characteristics 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 600µV max in the PNP stage. By trimming the input offset voltage of both input stages, the input offset voltage over the entire common mode range (CMRR) is typically 400µV, maintaining the precision characteristics of the amplifier. Micropower op amps are often not micropower during start-up characteristics 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. Also, when the output saturates, the part may draw excessive current and pull down the supplies, compromising rail-to-rail performance. Figure 1 shows the start-up characteristics of the LT6000/LT6001/LT6002 for three limiting cases. The circuits are shown in Figure 2. 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. The input stage of the LT6000/LT6001/LT6002 incorporates phase reversal protection to prevent wrong polarity outputs from occurring when the inputs are driven up to 2V below the negative rail. 30k 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 20 SUPPLY CURRENT PER AMPLIFIER (µA) The output of the LT6000/LT6001/LT6002 can swing to within 30mV of the positive rail with no load and within 30mV of the negative rail with no load. When monitoring input voltages within 30mV of the positive rail or within 30mV of the negative rail, gain should be taken to keep the output from clipping. The LT6000/LT6001/LT6002 can typically source 10mA on a single 5V supply, sourcing current is reduced to 4mA on a single 1.8V supply as noted in the electrical characteristics. OUTPUT AT VS/2 14 12 OUTPUT HIGH 10 8 6 4 2 0 0.5 1 + 4.5 5 Figure 1. Start-Up Characteristics + 30mV 1.5 2 2.5 3 3.5 4 SUPPLY VOLTAGE (V) 60012 F01 VS VS – OUTPUT LOW 16 0 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. 30mV 18 VS + VS/2 – – 60012 F02 Output High Output Low Output at VS/2 Figure 2. Circuits for Start-Up Characteristics 600012fa 12 LT6000/LT6001/LT6002 U W U U APPLICATIO S I FOR ATIO The LT6000/LT6001/LT6002 outputs can swing to within a respectable 30mV of each rail and draw virtually no excessive supply current. Figure 3 compares the dual LT6001 to a competitive part. Both op amps are in unity gain and their outputs are driven into each rail. The supply current is shown when the op amps are in linear operation and when they are driven into each rail. As can be seen from Figure 3, the supply current of the competitive part increases 3-fold or 5-fold depending on which rail the output goes to whereas the LT6001 draws virtually no excessive current. VOUT (V) COMPETITIVE PART LT6001 4 3 2 1 0 –1 –2 –3 VIN + – SUPPLY CURRENT PER AMPLIFIER VOUT –3 –2 –1 0 VIN (V) 1 2 3 ICC (µA) 70 60 50 40 30 20 10 VS = ±2.5V, AV = 1 Gain 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. Shutdown The single LT6000 and the 10-lead dual LT6001 include a shutdown feature that disables the part reducing quiescent current and makes the output high impedance. The devices can be shut down by bringing the SHDN pin within 0.3V of V–. The amplifiers are guaranteed to shut down if the SHDN pin is brought within 0.3V of V–. The exact switchover point will be a function of the supply voltage. See the Typical Performance Characteristics curves Supply Current vs Shutdown Pin Voltage. When shut down the total supply current is about 0.8µA and the output leakage current is 20nA (V– ≤ VOUT ≤ V+). For normal operation the SHDN pin should be tied to V+. It can be left floating, however, parasitic leakage currents over 1µA at the SHDN pin may inadvertently place the part into shutdown. 60012 F03 Figure 3. VOUT and ICC vs Input Voltage 600012fa 13 LT6000/LT6001/LT6002 U TYPICAL APPLICATIO Gain of 100 Amplifier (400kHz GBW on 30µA Supply) 0.9V (NiMH) 3 VIN 8 + 1 1/2 LT6001 2 5 – + 7 1/2 LT6001 6 –0.9V (NiMH) 90.9k OUT – 90.9k 60012 TA02a 10k 10k Gain vs Frequency 60 50 40 GAIN (dB) 30 20 10 0 –10 –20 –30 –40 100 1k 10k 100k FREQUENCY (Hz) 1M 60012 TA02b 600012fa 14 LT6000/LT6001/LT6002 U PACKAGE DESCRIPTIO DCB Package 6-Lead Plastic DFN (2mm × 3mm) (Reference LTC DWG # 05-08-1715) 0.70 ±0.05 3.55 ±0.05 1.65 ±0.05 (2 SIDES) 2.15 ±0.05 PACKAGE OUTLINE 0.25 ± 0.05 0.50 BSC 1.35 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS R = 0.115 TYP 2.00 ±0.10 (2 SIDES) R = 0.05 TYP 3.00 ±0.10 (2 SIDES) 0.40 ± 0.10 4 6 1.65 ± 0.10 (2 SIDES) PIN 1 NOTCH R0.20 OR 0.25 × 45° CHAMFER PIN 1 BAR TOP MARK (SEE NOTE 6) 3 0.200 REF 0.75 ±0.05 1 (DCB6) DFN 0405 0.25 ± 0.05 0.50 BSC 1.35 ±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 (TBD) 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 600012fa 15 LT6000/LT6001/LT6002 U PACKAGE DESCRIPTIO MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660) 0.889 ± 0.127 (.035 ± .005) 5.23 (.206) MIN 3.20 – 3.45 (.126 – .136) 0.42 ± 0.038 (.0165 ± .0015) TYP 3.00 ± 0.102 (.118 ± .004) (NOTE 3) 0.65 (.0256) BSC 8 7 6 5 0.52 (.0205) REF RECOMMENDED SOLDER PAD LAYOUT 0.254 (.010) 3.00 ± 0.102 (.118 ± .004) (NOTE 4) 4.90 ± 0.152 (.193 ± .006) DETAIL “A” 0° – 6° TYP GAUGE PLANE 0.53 ± 0.152 (.021 ± .006) DETAIL “A” 1 2 3 4 1.10 (.043) MAX 0.86 (.034) REF 0.18 (.007) SEATING PLANE 0.22 – 0.38 (.009 – .015) TYP 0.65 (.0256) NOTE: BSC 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 0.127 ± 0.076 (.005 ± .003) MSOP (MS8) 0204 600012fa 16 LT6000/LT6001/LT6002 U PACKAGE DESCRIPTIO DD Package 10-Lead (3mm × 3mm) Plastic DFN (Reference LTC DWG # 05-08-1699) 0.675 ±0.05 3.50 ±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 6 3.00 ±0.10 (4 SIDES) 0.38 ± 0.10 10 1.65 ± 0.10 (2 SIDES) PIN 1 TOP MARK (SEE NOTE 6) (DD10) DFN 1103 5 0.200 REF 1 0.75 ±0.05 0.00 – 0.05 0.25 ± 0.05 0.50 BSC 2.38 ±0.10 (2 SIDES) BOTTOM VIEW—EXPOSED PAD NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-2). CHECK THE LTC WEBSITE DATA SHEET FOR CURRENT STATUS OF VARIATION ASSIGNMENT 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 600012fa 17 LT6000/LT6001/LT6002 U PACKAGE DESCRIPTIO GN Package 16-Lead Narrow Plastic SSOP (Reference LTC DWG # 05-08-1641) .189 – .196* (4.801 – 4.978) .045 ± .005 16 15 14 13 12 11 10 9 .254 MIN .009 (0.229) REF .150 – .165 .229 – .244 (5.817 – 6.198) .0165 ± .0015 .150 – .157** (3.810 – 3.988) .0250 BSC RECOMMENDED SOLDER PAD LAYOUT 1 .015 ± .004 × 45° (0.38 ± 0.10) .007 – .0098 (0.178 – 0.249) .0532 – .0688 (1.35 – 1.75) 2 3 4 5 6 7 8 .004 – .0098 (0.102 – 0.249) 0° – 8° TYP .016 – .050 (0.406 – 1.270) NOTE: 1. CONTROLLING DIMENSION: INCHES INCHES 2. DIMENSIONS ARE IN (MILLIMETERS) .008 – .012 (0.203 – 0.305) TYP .0250 (0.635) BSC GN16 (SSOP) 0204 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 600012fa 18 LT6000/LT6001/LT6002 U PACKAGE DESCRIPTIO DHC Package 16-Lead (5mm × 5mm) Plastic DFN (Reference LTC DWG # 05-08-1706) 0.65 ±0.05 3.50 ±0.05 1.65 ±0.05 2.20 ±0.05 (2 SIDES) PACKAGE OUTLINE 0.25 ± 0.05 0.50 BSC 4.40 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS R = 0.115 TYP 5.00 ±0.10 (2 SIDES) R = 0.20 TYP 3.00 ±0.10 (2 SIDES) 9 0.40 ± 0.10 16 1.65 ± 0.10 (2 SIDES) PIN 1 TOP MARK (SEE NOTE 6) PIN 1 NOTCH (DHC16) DFN 1103 8 0.200 REF 1 0.25 ± 0.05 0.50 BSC 0.75 ±0.05 4.40 ±0.10 (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 600012fa 19 LT6000/LT6001/LT6002 U TYPICAL APPLICATIO Low Power V-to-F Converter VREF VREF 2M 2M VREF 42.2k 1M 3 + 7 2M 1M 2 1M 3 8 ® – LTC 1440 0.1µF A2 1/2 LT6001 1 VOUT 6 5 2 TP0610 + 1M – 1 42.2k VREF 1000pF VREF 5 VIN 6 + DIODES: CENTRAL SEMI CMOD3003 ×4 8 A1 1/2 LT6001 7 2N7002 – 0.1µF 4 VS 4.3V TO 20V 0.1µF FREQUENCY OUT ≈ 7.5Hz/mV • VIN LINEARITY ≈ 5%, VIN 20mV TO 800mV ISUPPLY ≈ 60µA TO 100µA 6 4 LT1790-4.096 VREF 1µF 42.2k 60012 TA03 1 MUX Amplifier 2 MUX Amplifier Waveforms 1.8V + VIN1 – LT6000 SHDN VOUT VOUT 1.8V + VIN2 – LT6000 SHDN INPUT SELECT VS = 1.8V 5ms/DIV VIN1 = 250Hz AT 1VP-P VIN2 = 500Hz AT 0.5VP-P INPUT SELECT = 25Hz AT 1.8VP-P 60012 TA04a INPUT SELECT SN74LVC2604 60012 TA04b RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT2178/LT2179 17µA Dual/Quad Single Supply Op Amps ® 120µV VOS(MAX), Gain Bandwidth = 60kHz 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 Over-The-Top is a registered trademark of Linear Technology Corporation. 600012fa 20 Linear Technology Corporation LT 0406 REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2005