LT6011/LT6012 Dual/Quad135µA, 14nV/√Hz, Rail-to-Rail Output Precision Op Amp U FEATURES DESCRIPTIO The LT®6011/LT6012 op amps combine low noise and high precision input performance with low power consumption and rail-to-rail output swing. 60µV Maximum Offset Voltage 300pA Maximum Input Bias Current 135µA Supply Current per Amplifier Rail-to-Rail Output Swing 120dB Minimum Voltage Gain, VS = ±15V 0.8µV/°C Maximum VOS Drift 14nV/√Hz Input Noise Voltage 2.7V to ±18V Supply Voltage Operation Operating Temperature Range: – 40°C to 85°C Space Saving 3mm × 3mm DFN Package ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Input offset voltage is trimmed to less than 60µV. The low drift and excellent long-term stability guarantee a high accuracy over temperature and time. The 300pA maximum input bias current and 120dB minimum voltage gain further maintain this precision over operating conditions. The LT6011/LT6012 work on any power supply voltage from 2.7V to 36V and draw only 135µA of supply current on a 5V supply. The output swings to within 40mV of either supply rail, making the amplifier a good choice for low voltage single supply applications. U APPLICATIO S Thermocouple Amplifiers Precision Photo Diode Amplifiers Instrumentation Amplifiers Battery-Powered Precision Systems Low Voltage Precision Systems ■ ■ ■ ■ ■ The LT6011/LT6012 are specified at 5V and ±15V supplies and from –40°C to 85°C. The LT6011 (dual) is available in SO-8 and space saving 3mm × 3mm DFN packages. The LT6012 (quad) is available in SO-14 and 16-pin SSOP packages. , LTC and LT are registered trademarks of Linear Technology Corporation. SoftSpan is a trademark of Linear Technology Corporation. U TYPICAL APPLICATIO Low Power Programmable Output Range 16-Bit SoftSpanTM DAC VS+ 20V Output Step Response LT1236-5 5 + 1/2 LT6011 6 7 5V/DIV 0V SUPPLY CURRENT ≅ 1.6mA TO 4mA DEPENDING ON CODE – C2 270pF 2 1 16 15 R1 RCOM R2 REF ROFS RFB R1 5V 9 13 12 11 10 4 VS+ VCC IOUT1 CLR SCK SDO 5 2 IOUT2 6 3 16-BIT DAC CS/LD SDI 5V/DIV 0V C1 270pF R2 0.1µF 14 3 AGND LTC1592 GND – 8 1/2 LT6011 7 8 + 1 VOUT 100µs/DIV 6011 TA03 4 VS– 6011 TA01 sn60112 60112fas 1 LT6011/LT6012 W W W AXI U U ABSOLUTE RATI GS (Note 1) Total Supply Voltage (V+ to V–) .............................. 40V Differential Input Voltage (Note 2) .......................... 10V Input Voltage .................................................... V+ to V– Input Current (Note 2) ....................................... ±10mA Output Short-Circuit Duration (Note 3) ........... Indefinite Operating Temperature Range (Note 4) .. – 40°C to 85°C Specified Temperature Range (Note 5) ... – 40°C to 85°C Maximum Junction Temperature DD Package ..................................................... 125°C All Other Packages .......................................... 150°C Storage Temperature Range DD Package ..................................... – 65°C to 125°C All Other Packages .......................... – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C U U W PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER OUT A 1 –IN A 2 A +IN A 3 V – B 4 8 V+ 7 OUT B 6 –IN B 5 +IN B LT6011CDD LT6011IDD LT6011ACDD LT6011AIDD TOP VIEW OUT A 1 –IN A 2 V– DD PACKAGE 8-LEAD (3mm × 3mm) PLASTIC DFN TJMAX = 125°C, θJA = 160°C/W UNDERSIDE METAL CONNECTED TO V– (PCB CONNECTION OPTIONAL) TOP VIEW 14 OUT D OUT A 1 +IN A 3 – A + + – –IN A 2 D V+ 4 +IN B 5 –IN B 6 OUT B 7 13 –IN D 12 +IN D 11 V – + –B + 10 +IN C – 9 –IN C C 8 OUT C DD PART MARKING* LT6012CS LT6012IS LT6012ACS LT6012AIS V+ 7 OUT B 6 –IN B 5 +IN B B 4 S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 190°C/W LACD ORDER PART NUMBER 8 A +IN A 3 TOP VIEW OUT A 1 –IN A 2 +IN A 3 16 OUT D – A + + – TOP VIEW ORDER PART NUMBER D V+ 4 +IN B 5 –IN B 6 OUT B 7 S PACKAGE 14-LEAD PLASTIC SO TJMAX = 150°C, θJA = 110°C/W NC 8 15 –IN D 14 +IN D 13 V – + –B + 12 +IN C C– 11 –IN C 10 OUT C 9 NC GN PACKAGE 16-LEAD PLASTIC SSOP TJMAX = 150°C, θJA = 135°C/W LT6011CS8 LT6011IS8 LT6011ACS8 LT6011AIS8 S8 PART MARKING 6011 6011I 6011A 6011AI ORDER PART NUMBER LT6012CGN LT6012IGN LT6012ACGN LT6012AIGN GN PART MARKING 6012 6012I 6012A 6012AI *Temperature and electrical grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. sn60112 60112fas 2 LT6011/LT6012 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 5V, 0V; VCM = 2.5V; RL to 0V; unless otherwise specified. (Note 5) SYMBOL PARAMETER CONDITIONS MIN VOS Input Offset Voltage (Note 8) LT6011AS8, LT6012AS TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6011ADD, LT6012AGN TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6011S8, LT6012S TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6011DD, LT6012GN TA = 0°C to 70°C TA = –40°C to 85°C ● ● ∆VOS/∆T Input Offset Voltage Drift (Note 6) LT6011AS8, LT6011S8, LT6012AS,LT6012S LT6011ADD, LT6011DD,LT6012AGN, LT6012GN ● ● IOS Input Offset Current (Note 8) LT6011AS8, LT6011ADD, LT6012AS, LT6012AGN TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6011S8, LT6011DD, LT6012S, LT6012GN TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6011AS8, LT6011ADD, LT6012AS, LT6012AGN TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6011S8, LT6011DD, LT6012S, LT6012GN TA = 0°C to 70°C TA = –40°C to 85°C ● ● IB Input Bias Current (Note 8) TYP MAX UNITS 20 60 85 110 µV µV µV 25 85 135 170 µV µV µV 25 75 100 125 µV µV µV 30 125 175 210 µV µV µV 0.2 0.2 0.8 1.2 µV/°C µV/°C 20 300 450 600 pA pA pA 150 900 1200 1500 pA pA pA 20 ±300 ±450 ±600 pA pA pA 150 ±900 ±1200 ±1500 pA pA pA Input Noise Voltage 0.1Hz to 10Hz 400 nVP-P en Input Noise Voltage Density f = 1kHz 14 nV/√Hz in Input Noise Current Density f = 1kHz, Unbalanced Source Resistance 0.1 pA/√Hz RIN Input Resistance Common Mode, VCM = 1V to 3.8V Differential 120 20 GΩ MΩ CIN Input Capacitance 4 pF VCM Input Voltage Range (Positive) Input Voltage Range (Negative) Guaranteed by CMRR Guaranteed by CMRR ● ● 3.8 Common Mode Rejection Ratio VCM = 1V to 3.8V ● 107 135 CMRR 10 4 0.7 2.4 V V 1 dB Minimum Supply Voltage Guaranteed by PSRR ● PSRR Power Supply Rejection Ratio VS = 2.7V to 36V, VCM = 1/2VS ● 112 135 2.7 dB V AVOL Large-Signal Voltage Gain RL = 10k, VOUT = 1V to 4V RL = 2k, VOUT = 1V to 4V ● ● 300 250 2000 2000 V/mV V/mV Channel Separation VOUT = 1V to 4V ● 110 140 dB sn60112 60112fas 3 LT6011/LT6012 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 5V, 0V; VCM = 2.5V; RL to 0V; unless otherwise specified. (Note 5) SYMBOL PARAMETER VOUT Maximum Output Swing (Positive, Referred to V +) CONDITIONS MIN No Load, 50mV Overdrive TYP MAX 35 55 65 mV mV 120 170 220 mV mV 40 55 65 mV mV 150 225 275 mV mV ● ISOURCE = 1mA, 50mV Overdrive ● Maximum Output Swing (Negative, Referred to 0V) No Load, 50mV Overdrive ● ISINK = 1mA, 50mV Overdrive ● ISC Output Short-Circuit Current (Note 3) VOUT = 0V, 1V Overdrive, Source 10 4 14 ● mA mA 10 4 21 ● mA mA 0.06 0.05 0.04 0.09 ● ● V/µs V/µs V/µs 250 225 330 ● kHz kHz 45 µs VOUT = 5V, –1V Overdrive, Sink SR GBW Slew Rate Gain Bandwidth Product AV = –10, RF = 50k, RG = 5k TA = 0°C to 70°C TA = –40°C to 85°C UNITS f = 10kHz ts Settling Time AV = –1, 0.01%, VOUT = 1.5V to 3.5V tr, tf Rise Time, Fall Time AV = 1, 10% to 90%, 0.1V Step 1 ∆VOS Offset Voltage Match (Note 7) LT6011AS8, LT6012AS TA = 0°C to 70°C TA = –40°C to 85°C 50 ● ● 120 170 220 µV µV µV LT6011ADD, LT6012AGN TA = 0°C to 70°C TA = –40°C to 85°C 50 ● ● 170 270 340 µV µV µV LT6011S8, LT6012S TA = 0°C to 70°C TA = –40°C to 85°C 50 ● ● 150 200 250 µV µV µV LT6011DD, LT6012GN TA = 0°C to 70°C TA = –40°C to 85°C 60 ● ● 250 350 420 µV µV µV LT6011AS8, LT6011ADD, LT6012AS, LT6012AGN TA = 0°C to 70°C TA = –40°C to 85°C 50 ● ● 600 900 1200 pA pA pA LT6011S8, LT6011DD, LT6012S, LT6012GN TA = 0°C to 70°C TA = –40°C to 85°C ● ● 1800 2400 3000 pA pA pA ∆IB Input Bias Current Match (Note 7) µs ∆CMRR Common Mode Rejection Ratio Match (Note 7) ● 101 135 dB ∆PSRR Power Supply Rejection Ratio Match (Note 7) ● 106 135 dB IS Supply Current per Amplifier TA = 0°C to 70°C TA = –40°C to 85°C 135 ● ● 150 190 210 µA µA µA sn60112 60112fas 4 LT6011/LT6012 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = ±15V, VCM = 0V, RL to 0V, unless otherwise specified. (Note 5) SYMBOL VOS PARAMETER Input Offset Voltage (Note 8) ∆VOS/∆T Input Offset Voltage Drift (Note 6) IOS Input Offset Current (Note 8) IB Input Bias Current (Note 8) CONDITIONS LT6011AS8, LT6012AS TA = 0°C to 70°C TA = –40°C to 85°C LT6011ADD, LT6012AGN TA = 0°C to 70°C TA = –40°C to 85°C LT6011S8, LT6012S TA = 0°C to 70°C TA = –40°C to 85°C LT6011DD, LT6012GN TA = 0°C to 70°C TA = –40°C to 85°C LT6011AS8, LT6011S8, LT6012AS, LT6012S LT6011ADD, LT6011DD, LT6012AGN, LT6012GN LT6011AS8, LT6011ADD, LT6012AS LT6012AGN TA = 0°C to 70°C TA = –40°C to 85°C LT6011S8, LT6011DD, LT6012S, LT6012GN TA = 0°C to 70°C TA = –40°C to 85°C LT6011AS8, LT6011ADD, LT6012AS, LT6012AGN TA = 0°C to 70°C TA = –40°C to 85°C LT6011S8, LT6011DD, LT6012S, LT6012GN TA = 0°C to 70°C TA = –40°C to 85°C 0.1Hz to 10Hz f = 1kHz f = 1kHz, Unbalanced Source Resistance Common Mode, VCM = ±13.5V Differential MIN ● ● 35 ● ● 35 ● ● 40 ● ● ● ● 150 ● ● 20 ● ● 150 ● ● Input Noise Voltage Input Noise Voltage Density Input Noise Current Density Input Resistance CIN VCM CMRR Input Capacitance Input Voltage Range Common Mode Rejection Ratio Guaranteed by CMRR VCM = –13.5V to 13.5V ● Minimum Supply Voltage Power Supply Rejection Ratio Large-Signal Voltage Gain Guaranteed by PSRR VS = ±1.35V to ±18V RL = 10k, VOUT = –13.5V to 13.5V ● PSRR AVOL 50 ±13.5 115 ● 112 ● ● RL = 5k, VOUT = –13.5V to 13.5V ● VOUT VOUT = –13.5V to 13.5V No Load, 50mV Overdrive 0.2 0.2 20 ● ● en in RIN Channel Separation Maximum Output Swing (Positive, Referred to V +) TYP 30 ● 112 1000 600 500 300 120 400 13 0.1 400 20 4 ±14 135 135 ±1.2 135 2000 140 45 140 ● Maximum Output Swing (Negative, Referred to V –) No Load, 50mV Overdrive 45 ● ISINK = 1mA, 50mV Overdrive 150 ● ±1.35 1500 ● ISOURCE = 1mA, 50mV Overdrive MAX 135 160 185 160 210 225 150 175 200 200 250 275 0.8 1.3 300 450 600 900 1200 1500 ±300 ±450 ±600 ±900 ±1200 ±1500 80 100 195 240 80 100 250 300 UNITS µV µV µV µV µV µV µV µV µV µV µV µV µV/°C µV/°C pA pA pA pA pA pA pA pA pA pA pA pA nVP-P nV/√Hz pA/√Hz GΩ MΩ pF V dB dB V dB V/mV V/mV V/mV V/mV dB mV mV mV mV mV mV mV mV sn60112 60112fas 5 LT6011/LT6012 ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = ±15V, VCM = 0V, RL to 0V, unless otherwise specified. (Note 5) SYMBOL ISC PARAMETER Output Short-Circuit Current (Note 3) CONDITIONS VOUT = 0V, 1V Overdrive (Source) ● 109 135 UNITS mA mA mA mA V/µs V/µs V/µs kHz kHz µs µs µV µV µV µV µV µV µV µV µV µV µV µV pA pA pA pA pA pA dB ● 106 135 dB ● VOUT = 0V, –1V Overdrive (Sink) ● SR GBW Slew Rate Gain Bandwidth Product AV = –10, RF = 50k, RG = 5k TA = 0°C to 70°C TA = –40°C to 85°C f = 10kHz ● ● ● ts tr, tf ∆VOS ∆IB ∆CMRR ∆PSRR IS Settling Time Rise Time, Fall Time Offset Voltage Match (Note 7) Input Bias Current Match (Note 7) Common Mode Rejection Ratio Match (Note 7) Power Supply Rejection Ratio Match (Note 7) Supply Current AV = –1, 0.01%, VOUT = 0V to 10V AV = 1, 10% to 90%, 0.1V Step LT6011AS8, LT6012AS TA = 0°C to 70°C TA = –40°C to 85°C LT6011ADD, LT6012AGN TA = 0°C to 70°C TA = –40°C to 85°C LT6011S8, LT6012S TA = 0°C to 70°C TA = –40°C to 85°C LT6011DD, LT6012GN TA = 0°C to 70°C TA = –40°C to 85°C LT6011AS8, LT6011ADD, LT6012AS, LT6012AGN TA = 0°C to 70°C TA = –40°C to 85°C LT6011S8, LT6011DD, LT6012S, LT6012GN TA = 0°C to 70°C TA = –40°C to 85°C per Amplifier TA = 0°C to 70°C TA = –40°C to 85°C Note 1: Absolute Maximum Ratings are those beyond which the life if the device may be impaired. Note 2: The inputs are protected by back-to-back diodes and internal series resistors. If the differential input voltage exceeds 10V, the input current must be limited to less than 10mA. Note 3: A heat sink may be required to keep the junction temperature below absolute maximum ratings. Note 4: Both the LT6011C/LT6012C and LT6011I/LT6012I are guaranteed functional over the operating temperature range of – 40°C to 85°C. Note 5: The LT6011C/LT6012C are guaranteed to meet the specified performance from 0°C to 70°C and is designed, characterized and expected to meet specified performance from – 40°C to 85°C but is not tested or QA sampled at these temperatures. The LT6011I/LT6012I are guaranteed to meet specified performance from –40°C to 85°C. MIN 10 5 10 5 0.08 0.07 0.05 275 250 TYP 15 20 0.11 350 85 1 50 ● ● 50 ● ● 70 ● ● 80 ● ● 50 ● ● ● ● 260 ● ● MAX 270 320 370 320 420 450 300 350 400 400 500 550 600 900 1200 1800 2400 3000 330 380 400 µA µA µA Note 6: This parameter is not 100% tested. Note 7: Matching parameters are the difference between any two amplifiers. ∆CMRR and ∆PSRR are defined as follows: (1) CMRR and PSRR are measured in µV/V for the individual amplifiers. (2) The difference between matching amplifiers is calculated in µV/V. (3) The result is converted to dB. Note 8: The specifications for VOS, IB, and IOS depend on the grade and on the package. The following table clarifies the notations. S8 Package STANDARD GRADE A GRADE LT6011S8 LT6011AS8 DFN Package LT6011DD LT6011ADD S14 Package LT6012S LT6012AS GN16 Package LT6012GN LT6012AGN sn60112 60112fas 6 LT6011/LT6012 U W TYPICAL PERFOR A CE CHARACTERISTICS Input Offset Voltage vs Temperature Distribution of Input Offset Voltage 125 30 LT6011S8, LT6012S VS = 5V, 0V TA = 25°C 25 120 VS = 5V, 0V REPRESENTATIVE UNITS 100 15 10 OFFSET VOLTAGE (µV) 20 50 25 0 –25 –50 TA = 85°C 60 TA = –40°C 40 TA = 25°C 20 0 –100 0 –90 –70 –50 –30 –10 10 30 50 70 INPUT OFFSET VOLTAGE (µV) –125 –50 –25 90 50 25 0 75 TEMPERATURE (°C) 1600 LT6011A, LT6012A INPUT BIAS CURRENT (pA) 20 15 10 5 1000 800 600 400 –25 0 TA = 25°C –14.2V 0 25 75 50 TEMPERATURE (°C) 100 –200 –15 125 10 –5 0 5 –10 COMMON MODE VOLTAGE (V) 10 1000 0.1Hz to 10Hz Noise VS = ±15V TA = 25°C VS = 5V, 0V TA = 25°C f = 1kHz 1 UNBALANCED SOURCE RESISTORS NOISE VOLTAGE (0.2µV/DIV) TOTAL INPUT NOISE (µV/√Hz) INPUT CURRENT NOISE DENSITY (fA/√Hz) VOLTAGE NOISE 0.1 TOTAL NOISE 0.01 RESISTOR NOISE ONLY 0.001 0.0001 100 1k 15 1635 G06 10 1000 100 6011 G07 TA = –40°C 100 Total Input Noise vs Source Resistance CURRENT NOISE UNBALANCED SOURCE RESISTORS 10 100 FREQUENCY (Hz) 13.9V TA = 85°C 6011 G05 en, in vs Frequency 1 200 IB+ –200 –50 6011 G04 100 VS = ±15V TYPICAL PART –100 IB– 0 0 –400 –300 –200 –100 0 100 200 300 400 INPUT BIAS CURRENT (pA) 300 1200 200 15 Input Bias Current vs Input Common Mode Voltage VS = 5V, 0V TYPICAL PART 1400 VS = ±15V TA = 25°C 5 0 10 –10 –5 INPUT COMMON MODE VOLTAGE (V) 6011 G03 INPUT BIAS CURRENT (pA) VS = 5V, 0V TA = 25°C –20 –15 125 Input Bias Current vs Temperature Distribution of Input Bias Current 25 100 6011 G02 6011 G01 PERCENT OF UNITS (%) 80 –75 5 INPUT VOLTAGE NOISE DENSITY (nV/√Hz) VS = ±15V TYPICAL PART 100 75 OFFSET VOLTAGE (µV) PERCENT OF UNITS (%) Offset Voltage vs Input Common Mode Voltage 10k 100k 1M 10M SOURCE RESISTANCE (Ω) 100M 6011 G08 0 1 2 3 4 5 6 TIME (SEC) 7 8 9 10 6011 G09 sn60112 60112fas 7 LT6011/LT6012 U W TYPICAL PERFOR A CE CHARACTERISTICS Output Saturation Voltage vs Load Current (Output High) Output Voltage Swing vs Temperature V+ NOISE VOLTAGE (0.2µV/DIV) OUTPUT VOLTAGE SWING (mV) VS = ±15V TA = 25°C 1 VS = 5V, 0V NO LOAD –20 –40 OUTPUT HIGH –60 60 OUTPUT LOW 40 20 Output Saturation Voltage vs Load Current (Output Low) 75 50 25 TEMPERATURE (°C) 0 TA = 85°C TA = 25°C 0.1 TA = –40°C 0.01 0.01 125 500 Warm-Up Drift PER AMPLIFIER CHANGE IN OFFSET VOLTAGE (µV) 400 TA = 25°C TA = –40°C 350 TA = 85°C 300 TA = 25°C 250 10 3 450 0.1 0.1 1 LOAD CURRENT (mA) 6011 G12 Supply Current vs Supply Voltage TA = 85°C VS = 5V, 0V 6011 G11 VS = 5V, 0V 200 TA = –40°C 150 100 ±15V 2 ±2.5V 1 50 0.1 1 LOAD CURRENT (mA) 0 10 0 0 2 4 6011 G13 VS = 5V, 0V VOUT = 2VP-P TA = 25°C AV = 1: RL = 10k AV = –1: RF = RG = 10k 1 THD + NOISE (%) 1 THD + Noise vs Frequency 10 0.1 0.01 AV = –1 AV = 1 0.001 0.0001 10 100 1k 10k FREQUENCY (Hz) Settling Time vs Output Step 10 VS = ±15V VIN = 20VP-P TA = 25°C AV = –1 AV = 1 6011 G16 0.0001 10 6 0.1% 0.01% 4 2 0.001 100k VS = ±15V AV = 1 8 0.1 0.01 150 6011 G15 6011 G14 THD + Noise vs Frequency 10 30 60 90 120 TIME AFTER POWER-ON (SECONDS) 6 8 10 12 14 16 18 20 SUPPLY VOLTAGE (±V) OUTPUT STEP (V) 0.01 0.01 THD + NOISE (%) 100 6011 G10 SUPPLY CURRENT (µA) OUTPUT LOW SATURATION VOLTAGE (V) 1 V– – 50 – 25 10 20 30 40 50 60 70 80 90 100 TIME (SEC) 0 OUTPUT HIGH SATURATION VOLTAGE (V) 0.01Hz to 1Hz Noise 0 100 1k FREQUENCY (Hz) 10k 6011 G17 0 10 20 30 40 50 60 70 SETTLING TIME (µs) 80 90 6011 G18 sn60112 60112fas 8 LT6011/LT6012 U W TYPICAL PERFOR A CE CHARACTERISTICS Channel Separation vs Frequency 160 VS = ±15V AV = –1 CHANNEL SEPARATION (dB) OUTPUT STEP (V) VS = 5V, 0V TA = 25°C 140 8 6 0.1% 0.01% 4 2 CMRR vs Frequency 160 COMMON MODE REJECTION RATIO (dB) Settling Time vs Output Step 10 120 100 80 60 40 20 0 0 0 10 30 40 50 60 70 SETTLING TIME (µs) 20 80 1 90 10 100 1k 10k FREQUENCY (Hz) 100k PSRR vs Frequency POWER SUPPLY REJECTION RATIO (dB) +PSRR 60 –PSRR 40 AV = 100 1 AV = 10 10 100 1k 10k FREQUENCY (Hz) 100k 20 –40 0.01 0.1 1M 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) CL = 500pF 0 CL = 50pF –5 CL = 50pF –5 –10 –10 – 240 –15 –15 –280 10M –20 –10 VS = 5V, 0V TA = 25°C 5 CL = 500pF GAIN (dB) –200 Gain vs Frequency, AV = –1 10 0 GAIN (dB) –160 – 20 1 6011 G24 VS = 5V, 0V TA = 25°C 5 –120 PHASE 0 10 PHASE SHIFT (DEG) OPEN-LOOP GAIN (dB) 40 Gain vs Frequency, AV = 1 30 10 60 6011 G23 Gain and Phase vs Frequency 20 80 0 1 –80 1M –20 6011 G22 GAIN 100k VS = 5V, 0V TA = 25°C RL = 10k 100 10 1M VS = 5V, 0V TA = 25°C RL = 10k 100 1k 10k FREQUENCY (Hz) 10 120 0.01 0 40 20 Open-Loop Gain vs Frequency AV = 1 50 40 140 0.1 60 60 6011 G21 VS = 5V, 0V TA = 25°C 20 10 100 1k 10k 100k FREQUENCY (Hz) VS = 5V, 0V 1 OPEN-LOOP GAIN (dB) OUTPUT IMPEDANCE (Ω) 80 1 VS = ±15V 80 0 1M 100 100 0.1 100 Output Impedance vs Frequency 1000 VS = 5V, 0V TA = 25°C 120 120 6011 G20 6011 G19 140 TA = 25°C 140 –30 – 40 1k 10k 100k 1M FREQUENCY (Hz) 6011 G25 –20 1k 10k 100k FREQUENCY (Hz) 1M 6011 G26 1k 10k 100k FREQUENCY (Hz) 1M 6011 G27 sn60112 60112fas 9 LT6011/LT6012 U W TYPICAL PERFOR A CE CHARACTERISTICS Small-Signal Transient Response Large-Signal Transient Response Rail-to-Rail Output Swing 5V 20mV/DIV 2V/DIV 0V 1V/DIV 0V 6011 G28 W 2µs/DIV AV = –1 VS = ±15V 50µs/DIV 6011 G29 AV = –1 VS = 5V, 0V 100µs/DIV 6011 G30 U AV = 1 U U APPLICATIO S I FOR ATIO Preserving Input Precision Preserving the input accuracy of the LT6011/LT6012 requires that the applications circuit and PC board layout do not introduce errors comparable to or greater than the 25µV typical offset of the amplifiers. Temperature differentials across the input connections can generate thermocouple voltages of 10’s of microvolts so the connections to the input leads should be short, close together and away from heat dissipating components. Air currents across the board can also generate temperature differentials. The extremely low input bias currents (20pA typical) allow high accuracy to be maintained with high impedance sources and feedback resistors. The LT6011/LT6012 low input bias currents are obtained by a cancellation circuit on-chip. This causes the resulting I B + and I B – to be uncorrelated, as implied by the IOS specification being comparable to IB. Do not try to balance the input resistances in each input lead; instead keep the resistance at either input as low as possible for maximum accuracy. Leakage currents on the PC board can be higher than the input bias current. For example, 10GΩ of leakage between a 15V supply lead and an input lead will generate 1.5nA! Surround the input leads with a guard ring driven to the same potential as the input common mode to avoid excessive leakage in high impedance applications. Input Protection The LT6011/LT6012 feature on-chip back-to-back diodes between the input devices, along with 500Ω resistors in 10 series with either input. This internal protection limits the input current to approximately 10mA (the maximum allowed) for a 10V differential input voltage. Use additional external series resistors to limit the input current to 10mA in applications where differential inputs of more than 10V are expected. For example, a 1k resistor in series with each input provides protection against 30V differential voltage. Input Common Mode Range The LT6011/LT6012 output is able to swing close to each power supply rail (rail-to-rail out), but the input stage is limited to operating between V – + 1V and V+ – 1.2V. Exceeding this common mode range will cause the gain to drop to zero, however, no phase reversal will occur. Total Input Noise The LT6011/LT6012 amplifier contributes negligible noise to the system when driven by sensors (sources) with impedance between 20kΩ and 1MΩ. Throughout this range, total input noise is dominated by the 4kTRS noise of the source. If the source impedance is less than 20kΩ, the input voltage noise of the amplifier starts to contribute with a minimum noise of 14nV/√Hz for very low source impedance. If the source impedance is more than 1MΩ, the input current noise of the amplifier, multiplied by this high impedance, starts to contribute and eventually dominate. Total input noise spectral density can be calculated as: vn(TOTAL) = en2 + 4kTRS + (in RS )2 sn60112 60112fas LT6011/LT6012 U W U U APPLICATIO S I FOR ATIO Rail-to-Rail Operation where en = 14nV/√Hz , in = 0.1pA/√Hz and RS is the total impedance at the input, including the source impedance. The LT6011/LT6012 outputs can swing to within millivolts of either supply rail, but the inputs can not. However, for most op amp configurations, the inputs need to swing less than the outputs. Figure 1 shows the basic op amp configurations, lists what happens to the op amp inputs and specifies whether or not the op amp must have rail-to-rail inputs. Select a rail-to-rail input op amp only when really necessary, because the input precision specifications are usually inferior. Capacitive Loads The LT6011/LT6012 can drive capacitive loads up to 500pF in unity gain. The capacitive load driving capability increases as the amplifier is used in higher gain configurations. A small series resistance between the output and the load further increases the amount of capacitance that the amplifier can drive. + VREF VIN RG + VIN – + VIN – RF – RF 6011 F01 RG VREF INVERTING: AV = –RF/RG OP AMP INPUTS DO NOT MOVE, BUT ARE FIXED AT DC BIAS POINT VREF NONINVERTING: AV = 1 + RF/RG INPUTS MOVE BY AS MUCH AS VIN, BUT THE OUTPUT MOVES MORE INPUT DOES NOT HAVE TO BE RAIL-TO-RAIL INPUT MAY NOT HAVE TO BE RAIL-TO-RAIL NONINVERTING: AV = 1 INPUTS MOVE BY AS MUCH AS OUTPUT INPUT MUST BE RAIL-TO-RAIL FOR OVERALL CIRCUIT RAIL-TO-RAIL PERFORMANCE Figure 1. Some Op Amp Configurations Do Not Require Rail-to-Rail Inputs to Achieve Rail-to-Rail Outputs W W SI PLIFIED SCHE ATIC (One Amplifier) + V R3 R6 R5 R4 Q7 Q18 Q6 Q8 RC1 Q5 Q4 Q3 D1 D2 +IN Q1 Q2 Q12 D5 Q14 C3 Q20 Q11 Q15 V– OUT D4 Q17 C B A –IN R2 500Ω Q13 D3 Q22 Q16 R1 500Ω C1 C2 Q21 B A Q19 Q9 Q10 6011 SS sn60112 60112fas 11 LT6011/LT6012 U PACKAGE DESCRIPTIO DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1698) R = 0.115 TYP 5 0.38 ± 0.10 8 0.675 ±0.05 3.5 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) 3.00 ±0.10 (4 SIDES) 1.65 ± 0.10 (2 SIDES) PIN 1 PACKAGE TOP MARK OUTLINE (DD8) DFN 0203 0.28 ± 0.05 0.200 REF 0.50 BSC 2.38 ±0.05 (2 SIDES) 0.75 ±0.05 0.00 – 0.05 4 0.28 ± 0.05 1 0.50 BSC 2.38 ±0.10 (2 SIDES) BOTTOM VIEW—EXPOSED PAD RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1) 2. ALL DIMENSIONS ARE IN MILLIMETERS 3. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 4. EXPOSED PAD SHALL BE SOLDER PLATED sn60112 60112fas 12 LT6011/LT6012 U PACKAGE DESCRIPTIO S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .189 – .197 (4.801 – 5.004) NOTE 3 .045 ±.005 .050 BSC 8 .245 MIN 7 6 5 .160 ±.005 .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) .030 ±.005 TYP 1 RECOMMENDED SOLDER PAD LAYOUT .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 0°– 8° 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 sn60112 60112fas 13 LT6011/LT6012 U PACKAGE DESCRIPTIO S14 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 × 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 sn60112 60112fas 14 LT6011/LT6012 U PACKAGE DESCRIPTIO GN Package 16-Lead Plastic SSOP (Narrow .150 Inch) (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 TYP RECOMMENDED SOLDER PAD LAYOUT 1 .015 ± .004 × 45° (0.38 ± 0.10) .007 – .0098 (0.178 – 0.249) 2 3 4 5 6 7 .053 – .068 (1.351 – 1.727) 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) .0250 (0.635) BSC 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 GN16 (SSOP) 0502 sn60112 60112fas Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 15 LT6011/LT6012 U TYPICAL APPLICATIO Low Power Hall Sensor Amplifier VS HALL ELEMENT ASAHI-KASEI HW-108A (RANK D) www.asahi-kasei.co.jp VS 4 LT1790-1.25 1, 2 3 6 + 100k 1% 400Ω ×4 2 – 1k – VOUT 49.9k 4 3 LT1782 VS = 3V TO 18V IS = ~600µA VOUT = ~40mV/mT 1 49.9k 10k OFFSET VS ADJUST 7.87k 1% 8 1/2 LT6011 2 1 + 6 26.7k 1% – 7 1/2 LT6011 5 + 4 6011 TA02 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1112/LT1114 Dual/Quad Low Power, Picoamp Input Precision Op Amp 250pA Input Bias Current LT1880 Rail-to-Rail Output, Picoamp Input Precision Op Amp SOT-23 LT1881/LT1882 Dual/Quad Rail-to-Rail Output, Picoamp Input Precision Op Amp CLOAD Up to 1000pF LT1884/LT1885 Dual/Quad Rail-to-Rail Output, Picoamp Input Precision Op Amp 9.5nV/√Hz Input Noise sn60112 60112fas 16 Linear Technology Corporation LT/TP 0903 1K 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 2003