LT6013/LT6014 Single/Dual 145µA, 9.5nV/√Hz, AV ≥5, Rail-to-Rail Output Precision Op Amps U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO 35µV Maximum Offset Voltage (LT6013A) Low 1/f Noise: 200nVP-P (0.1Hz to 10Hz) 40nVRMS (0.1Hz to 10Hz) Low White Noise: 9.5nV/√Hz (1kHz) Rail-to-Rail Output Swing 145µA Supply Current per Amplifier 250pA Maximum Input Bias Current (LT6013A) AV ≥5 Stable; Up to 500pF CLOAD 0.2V/µs Slew Rate 1.4MHz Gain Bandwidth Product 120dB Minimum Voltage Gain, VS = ±15V 0.8µV/°C Maximum VOS Drift 2.7V to ±18V Supply Voltage Operation Operating Temperature Range: – 40°C to 85°C Available in SO-8 and Space Saving 3mm × 3mm DFN Packages The LT®6013 and LT6014 op amps combine low noise and high precision input performance with low power consumption and rail-to-rail output swing. The amplifiers are stable in a gain of 5 or more and feature greatly improved CMRR and PSRR versus frequency compared to other precision op amps. Thermocouple Amplifiers Precision Photodiode Amplifiers Instrumentation Amplifiers Battery-Powered Precision Systems Low-Voltage Precision Systems Micro-Power Sensor Interface The amplifiers are fully specified at 5V and ±15V supplies and from –40°C to 85°C. The single LT6013 and dual LT6014 are both available in SO-8 and space saving 3mm × 3mm DFN packages. For unity gain stable versions, refer to the LT6010 and LT6011 data sheets. U APPLICATIO S ■ ■ ■ ■ ■ The LT6013 and LT6014 operate from any supply voltage from 2.7V to 36V and draw only 145µA of supply current per amplifier on a 5V supply. The output swings to within 40mV of either supply rail, making the amplifiers very useful for low voltage single supply operation. , LTC and LT are registered trademarks of Linear Technology Corporation. U ■ Input offset voltage is factory-trimmed to less than 35µV. The low drift and excellent long-term stability ensure a high accuracy over temperature and time. The 250pA maximum input bias current and 120dB minimum voltage gain further maintain this precision over operating conditions. TYPICAL APPLICATIO Gain of 10 Single Ended to Differential Converter LT6013/LT6014 0.1Hz to 10Hz Voltage Noise V+ 1/2 LT6014 5 • VIN – 2k 8.06k 10k 2k – 1/2 LT6014 INPUT VOLTAGE NOISE (0.1µV/DIV) + VIN VS = 5V, 0V TA = 25°C EQUIVALENT RMS VOLTAGE = 40nVRMS –5 • VIN + 0 V– 60134 TA01a 1 2 3 4 5 6 TIME (SEC) 7 8 9 10 60134 TA01b 60134fa 1 LT6013/LT6014 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 S8 Package ...................................................... 150°C Storage Temperature Range DD Package ..................................... – 65°C to 125°C S8 Package ...................................... – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C U U W PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER TOP VIEW *NC 1 8 *NC –IN 2 – 7 V+ +IN 3 + 6 OUT V– 4 5 NC LT6013CDD LT6013IDD LT6013ACDD LT6013AIDD ORDER PART NUMBER TOP VIEW *NC 1 TJMAX = 125°C, θJA = 160°C/W UNDERSIDE METAL CONNECTED TO V– (PCB CONNECTION OPTIONAL) DD PART MARKING* – 7 V+ +IN 3 + 6 OUT 5 NC *No Connection 8 V+ OUT A 1 +IN A 3 V – 4 7 OUT B A B 6 –IN B 5 +IN B LT6014CDD LT6014IDD LT6014ACDD LT6014AIDD TOP VIEW OUT A 1 –IN A 2 TJMAX = 125°C, θJA = 160°C/W UNDERSIDE METAL CONNECTED TO V– (PCB CONNECTION OPTIONAL) 8 V+ 7 OUT B 6 –IN B 5 +IN B A +IN A 3 V– DD PACKAGE 8-LEAD (3mm × 3mm) PLASTIC DFN LT6013CS8 LT6013IS8 LT6013ACS8 LT6013AIS8 S8 PART MARKING 6013 6013I 6013A 6013AI ORDER PART NUMBER ORDER PART NUMBER TOP VIEW –IN A 2 4 S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 190°C/W LBHC *No Connection *NC –IN 2 V– DD PACKAGE 8-LEAD (3mm × 3mm) PLASTIC DFN 8 DD PART MARKING* LBCB B 4 S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, θJA = 190°C/W LT6014CS8 LT6014IS8 LT6014ACS8 LT6014AIS8 S8 PART MARKING 6014 6014I 6014A 6014AI *Temperature and electrical grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. 60134fa 2 LT6013/LT6014 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 TYP MAX VOS Input Offset Voltage (Note 8) LT6013AS8 TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6013S8, LT6014AS8 TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6013ADD TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6014S8 TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6013DD, LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C ● ● 10 35 60 75 µV µV µV 20 60 85 110 µV µV µV 20 60 110 150 µV µV µV 20 75 100 125 µV µV µV 30 85 135 170 µV µV µV 30 125 175 210 µV µV µV 0.2 0.2 0.8 1.4 µV/°C µV/°C 100 250 500 600 pA pA pA 100 500 600 700 pA pA pA 150 800 1000 1200 pA pA pA 100 ±250 ±500 ±600 pA pA pA LT6013S8, LT6013DD, LT6014AS8, LT6014ADD ● TA = 0°C to 70°C ● TA = –40°C to 85°C 100 ±400 ±600 ±800 pA pA pA LT6014S8, LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C 150 ±800 ±1000 ±1200 pA pA pA ∆VOS/∆T Input Offset Voltage Drift (Note 6) S8 Packages DD Packages ● ● IOS Input Offset Current (Note 8) LT6013AS8, LT6013ADD TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6014AS8, LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6013/LT6014 (Standard grades) TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6013AS8, LT6013ADD TA = 0°C to 70°C TA = –40°C to 85°C ● ● IB en Input Bias Current (Note 8) Input Noise Voltage Density f = 1kHz, LT6013/LT6014 f = 1kHz, LT6013A/LT6014A ● ● 9.5 9.5 13 UNITS nV/√Hz nV/√Hz Input Noise Voltage (Low Frequency) Bandwidth = 0.01Hz to 1Hz 200 50 nVP-P nVRMS Bandwidth = 0.1Hz to 10Hz 200 40 nVP-P nVRMS 60134fa 3 LT6013/LT6014 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 in Input Noise Current Density f = 1kHz MIN TYP MAX UNITS 0.15 pA/√Hz Input Noise Current (Low Frequency) Bandwidth = 0.01Hz to 1Hz 7 1.3 pAP-P pARMS Bandwidth = 0.1Hz to 10Hz 5 0.4 pAP-P pARMS Common Mode, VCM = 1V to 3.8V Differential 120 20 GΩ MΩ 4 pF RIN Input Resistance CIN Input Capacitance VCM Input Voltage Range (Positive) Input Voltage Range (Negative) Guaranteed by CMRR Guaranteed by CMRR ● ● 3.8 CMRR Common Mode Rejection Ratio VCM = 1V to 3.8V ● 107 135 Minimum Supply Voltage Guaranteed by PSRR ● PSRR Power Supply Rejection Ratio VS = 2.7V to 36V, VCM = 1/2VS ● 112 135 dB 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, LT6014 ● 110 140 dB Maximum Output Swing (Positive, Referred to V +) No Load, 50mV Overdrive VOUT 4 0.7 2.4 No Load, 50mV Overdrive Output Short-Circuit Current (Note 3) VOUT = 0V, 1V Overdrive, Source 170 220 mV mV 40 55 65 mV mV 150 225 275 mV mV 8 4 14 ● mA mA 8 4 21 ● mA mA 0.15 0.12 0.1 0.2 ● ● V/µs V/µs V/µs 1 0.9 1.4 ● MHz MHz 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 V 120 ● ISC 2.7 mV mV ● ISINK = 1mA, 50mV Overdrive dB 55 65 ● Maximum Output Swing (Negative, Referred to 0V) V V 35 ● ISOURCE = 1mA, 50mV Overdrive 1 f = 10kHz ts Settling Time AV = –4, 0.01%, VOUT = 1.5V to 3.5V 20 µs tr, tf Rise Time, Fall Time AV = 5, 10% to 90%, 0.1V Step 1 µs 60134fa 4 LT6013/LT6014 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 ∆VOS Offset Voltage Match (Note 7) LT6014AS8 TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6014S8 TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6014AS8, LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6014S8, LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C ● ● ∆IB Input Bias Current Match (Note 7) MIN TYP MAX UNITS 50 120 170 220 µV µV µV 50 170 270 340 µV µV µV 50 150 200 250 µV µV µV 60 250 350 420 µV µV µV 200 800 1200 1400 pA pA pA 300 1600 2000 2400 pA pA pA ∆CMRR Common Mode Rejection Ratio Match (Note 7) LT6014 ● 101 135 dB ∆PSRR Power Supply Rejection Ratio Match (Note 7) LT6014 ● 106 135 dB IS Supply Current per Amplifier TA = 0°C to 70°C TA = –40°C to 85°C ● ● 145 µA µA µA 165 210 230 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 PARAMETER CONDITIONS VOS Input Offset Voltage (Note 8) LT6013AS8 TA = 0°C to 70°C TA = –40°C to 85°C MIN ● ● LT6013S8 TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6013ADD TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6013DD, LT6014AS8 TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6014S8 TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C ● ● TYP MAX UNITS 20 60 80 110 µV µV µV 25 85 110 135 µV µV µV 25 85 135 170 µV µV µV 30 135 160 185 µV µV µV 35 150 175 200 µV µV µV 35 160 210 225 µV µV µV 40 200 250 275 µV µV µV 60134fa 5 LT6013/LT6014 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 PARAMETER CONDITIONS ∆VOS/∆T Input Offset Voltage Drift (Note 6) S8 Packages DD Packages ● ● IOS Input Offset Current (Note 8) LT6013AS8, LT6013ADD TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6014AS8, LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6013/LT6014 (Standard grades) TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6013AS8, LT6013ADD TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6013S8, LT6013DD, LT6014AS8, LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C ● ● LT6014S8, LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C ● ● IB en in Input Bias Current (Note 8) Input Noise Voltage Density MIN f = 1kHz, LT6013/LT6014 f = 1kHz, LT6013A/LT6014A TYP MAX UNITS 0.2 0.2 0.8 1.2 µV/°C µV/°C 100 250 500 600 pA pA pA 100 500 600 700 pA pA pA 150 800 1000 1200 pA pA pA 100 ±250 ±500 ±600 pA pA pA 100 ±400 ±600 ±800 pA pA pA 150 ±800 ±1000 ±1200 pA pA pA 9.5 9.5 13 nV/√Hz nV/√Hz Input Noise Voltage (Low Frequency) Bandwidth = 0.01Hz to 1Hz 200 50 nVP-P nVRMS Bandwidth = 0.1Hz to 10Hz 200 40 nVP-P nVRMS f = 1kHz 0.15 pA/√Hz Input Noise Current (Low Frequency) Bandwidth = 0.01Hz to 1Hz 7 1.3 pAP-P pARMS Bandwidth = 0.1Hz to 10Hz 5 0.4 pAP-P pARMS Common Mode, VCM = ±13.5V Differential 400 20 GΩ MΩ 4 pF Input Noise Current Density RIN Input Resistance CIN Input Capacitance VCM Input Voltage Range Guaranteed by CMRR CMRR Common Mode Rejection Ratio VCM = –13.5V to 13.5V ● ±13.5 ±14 V ● 115 112 135 135 dB dB ±1.2 ±1.35 Minimum Supply Voltage Guaranteed by PSRR ● PSRR Power Supply Rejection Ratio VS = ±1.35V to ±18V ● 112 135 dB AVOL Large-Signal Voltage Gain RL = 10k, VOUT = –13.5V to 13.5V 2000 ● 1000 600 V/mV V/mV 500 300 1500 ● V/mV V/mV ● 120 140 dB RL = 5k, VOUT = –13.5V to 13.5V Channel Separation VOUT = –13.5V to 13.5V, LT6014 V 60134fa 6 LT6013/LT6014 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 PARAMETER CONDITIONS VOUT Maximum Output Swing (Positive, Referred to V +) No Load, 50mV Overdrive MIN TYP MAX UNITS 45 80 100 mV mV 140 195 240 mV mV 45 80 100 mV mV 150 250 300 mV mV ● ISOURCE = 1mA, 50mV Overdrive ● Maximum Output Swing (Negative, Referred to V –) No Load, 50mV Overdrive ● ISINK = 1mA, 50mV Overdrive ● ISC Output Short-Circuit Current (Note 3) VOUT = 0V, 1V Overdrive (Source) 8 5 15 ● mA mA 8 5 20 ● mA mA 0.15 0.12 0.1 0.2 ● ● V/µs V/µs V/µs 1.1 1 1.6 ● MHz MHz µs 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 Settling Time AV = –4, 0.01%, VOUT = 0V to 10V 40 tr, tf Rise Time, Fall Time AV = 5, 10% to 90%, 0.1V Step 0.9 ∆VOS Offset Voltage Match (Note 7) LT6014AS8 TA = 0°C to 70°C TA = –40°C to 85°C 50 ● ● 270 320 370 µV µV µV LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C 50 ● ● 320 420 450 µV µV µV LT6014S8 TA = 0°C to 70°C TA = –40°C to 85°C 70 ● ● 300 350 400 µV µV µV LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C 80 ● ● 400 500 550 µV µV µV LT6014AS8, LT6014ADD TA = 0°C to 70°C TA = –40°C to 85°C 200 ● ● 800 1200 1400 pA pA pA LT6014S8, LT6014DD TA = 0°C to 70°C TA = –40°C to 85°C 300 ● ● 1600 2000 2400 pA pA pA ∆IB Input Bias Current Match (Note 7) µs ∆CMRR Common Mode Rejection Ratio Match (Note 7) LT6014 ● 109 135 dB ∆PSRR Power Supply Rejection Ratio Match (Note 7) LT6014 ● 106 135 dB IS Supply Current per Amplifier TA = 0°C to 70°C TA = –40°C to 85°C ● ● 200 250 290 310 µA µA µA 60134fa 7 LT6013/LT6014 ELECTRICAL CHARACTERISTICS Note 1: Absolute Maximum Ratings are those beyond which the life of 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: The LT6013C/LT6014C and LT6013I/LT6014I are guaranteed functional over the operating temperature range of – 40°C to 85°C. Note 5: The LT6013C and LT6014C are guaranteed to meet the specified performance from 0°C to 70°C and are 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 LT6013I and LT6014I are guaranteed to meet specified performance from –40°C to 85°C. Note 6: This parameter is not 100% tested. Note 7: Matching parameters are the difference between the 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. STANDARD GRADE A GRADE S8 Package LT6013S8, LT6014S8 LT6013AS8, LT6014AS8 DFN Package LT6013DD, LT6014DD LT6013ADD, LT6014ADD U W TYPICAL PERFOR A CE CHARACTERISTICS Input Offset Voltage vs Temperature Distribution of Input Offset Voltage 100 1000 VS = 5V, 0V REPRESENTATIVE UNITS CHANGE IN OFFSET VOLTAGE (µV) PERCENT OF UNITS (%) 25 125 LT6013AS8 VS = 5V, 0V TA = 25°C 75 OFFSET VOLTAGE (µV) 30 Offset Voltage vs Input Common Mode Voltage 20 15 10 50 25 0 –25 –50 –75 5 –100 5 15 25 35 45 INPUT OFFSET VOLTAGE (µV) 50 25 0 75 TEMPERATURE (°C) 800 LT6013AS8 600 INPUT BIAS CURRENT (pA) PERCENT OF UNITS (%) 30 20 15 10 5 100 –175 –125 –75 –25 25 75 125 175 INPUT BIAS CURRENT (pA) 60134 G04 TA = 25°C 500 TA = 85°C 400 300 200 0 125 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 INPUT COMMON MODE VOLTAGE (V) 60134 G03 Input Bias Current vs Input Common Mode Voltage 400 VS = 5V, 0V TYPICAL PART 400 200 0 –200 –400 –600 0 600 Input Bias Current vs Temperature Distribution of Input Bias Current 25 TA = –40°C 700 60134 G02 60134 G01 35 800 100 –125 –50 –25 CHANGE IN INPUT BIAS CURRENT (pA) 0 –45 –35 –25 –15 –5 VS = 5V, 0V 900 –800 –50 TA = –40°C 200 100 0 0 25 75 50 TEMPERATURE (°C) 100 125 60134 G05 TA = 25°C –100 TA = 85°C –200 –300 –400 –25 VS = 5V, 0V 300 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 INPUT COMMON MODE VOLTAGE (V) 60134 G06 60134fa 8 LT6013/LT6014 U W TYPICAL PERFOR A CE CHARACTERISTICS Total Input Noise vs Source Resistance en, in vs Frequency 100 1/f CORNER = 2Hz VOLTAGE NOISE VS = 5V, 0V TA = 25°C 1 10 100 FREQUENCY (Hz) 1 VS = 5V, 0V TA = 25°C f = 1kHz 1 UNBALANCED SOURCE RESISTORS 0.1 TOTAL NOISE 0.01 RESISTOR NOISE ONLY 0.001 0.0001 100 1000 1k 1 0 10 20 30 40 50 60 70 80 90 100 TIME (SEC) 2 3 4 5 6 TIME (SEC) 7 40 20 V– – 50 – 25 75 50 25 TEMPERATURE (°C) 0 100 125 60134 G11 8 INPUT CURRENT NOISE (2pA/DIV) 60134 G32 1 TA = 85°C TA = 25°C 0.1 TA = –40°C 0.1 1 LOAD CURRENT (mA) 10 Output Saturation Voltage vs Load Current (Output Low) VS = 5V, 0V 0.01 0.01 9 10 20 30 40 50 60 70 80 90 100 TIME (SEC) 0 10 OUTPUT LOW SATURATION VOLTAGE (V) OUTPUT LOW OUTPUT HIGH SATURATION VOLTAGE (V) OUTPUT VOLTAGE SWING (mV) 1 OUTPUT HIGH 7 VS = 5V, 0V TA = 25°C BALANCED SOURCE RESISTANCE Output Saturation Voltage vs Load Current (Output High) –60 4 5 6 TIME (SEC) 60134 G31 Output Voltage Swing vs Temperature 60 9 8 60134 G10 –40 3 0.01Hz to 1Hz Current Noise VS = 5V, 0V TA = 25°C BALANCED SOURCE RESISTANCE INPUT CURRENT NOISE (2pA/DIV) INPUT VOLTAGE NOISE (0.1µV/DIV) VS = 5V, 0V TA = 25°C –20 2 60134 G09 0.1Hz to 10Hz Current Noise VS = 5V, 0V NO LOAD 1 0 60134 G08 0.01Hz to 1Hz Voltage Noise V+ 100M 10k 100k 1M 10M SOURCE RESISTANCE (Ω) 60134 G07 0 VS = 5V, 0V TA = 25°C INPUT VOLTAGE NOISE (0.1µV/DIV) 10 TOTAL INPUT NOISE (µV/√Hz) INPUT VOLTAGE NOISE DENSITY (nV/√Hz) 1/f CORNER = 40Hz INPUT CURRENT NOISE DENSITY (fA/√Hz) CURRENT NOISE UNBALANCED SOURCE RESISTORS 0.1Hz to 10Hz Voltage Noise 10 1000 10 60134 G12 VS = 5V, 0V TA = 85°C TA = 25°C 0.1 TA = –40°C 0.01 0.01 0.1 1 LOAD CURRENT (mA) 10 60134 G13 60134fa 9 LT6013/LT6014 U W TYPICAL PERFOR A CE CHARACTERISTICS Warm-Up Drift Supply Current vs Supply Voltage PER AMPLIFIER CHANGE IN OFFSET VOLTAGE (µV) 450 SUPPLY CURRENT (µA) 400 350 TA = 85°C 300 TA = 25°C 250 200 150 TA = –40°C 100 THD + Noise vs Frequency 10 3 VS = 5V, 0V VOUT = 2VP-P TA = 25°C AV = 5 1 ±15V THD + NOISE (%) 500 2 ±2.5V 1 0.1 0.01 0.001 50 0 0 2 0 4 30 60 90 120 TIME AFTER POWER-ON (SECONDS) 6 8 10 12 14 16 18 20 SUPPLY VOLTAGE (±V) THD + Noise vs Frequency VS = 5V, 0V AV = 5 TA = 25°C 0.1% LT6014 VS = 5V, 0V TA = 25°C 140 0.01% 2 1 0.001 100k Channel Separation vs Frequency CHANNEL SEPARATION (dB) OUTPUT STEP (V) THD + NOISE (%) 0.01 1k 10k FREQUENCY (Hz) 160 3 0.1 100 60134 G16 Settling Time vs Output Step 4 VS = ±15V VOUT = 20VP-P TA = 25°C AV = 5 1 0.0001 10 60134 G15 60134 G14 10 150 120 100 80 60 40 20 0.0001 10 0 0 100 1k FREQUENCY (Hz) 0 10k 5 60134 G17 120 100 80 60 40 20 0 100 1k 10k FREQUENCY (Hz) 100k 1M 60134 G21 10 100 1k 10k FREQUENCY (Hz) VS = 5V, 0V TA = 25°C 120 100 80 60 40 20 100k 1M 60134 G20 PSRR vs Frequency, Split Supplies 140 POWER SUPPLY REJECTION RATIO (dB) POWER SUPPLY REJECTION RATIO (dB) COMMON MODE REJECTION RATIO (dB) 140 140 10 1 30 PSRR vs Frequency, Single Supply TA = 25°C 1 25 60134 G18 CMRR vs Frequency 160 15 10 20 SETTLING TIME (µs) VS = ±15V TA = 25°C 120 100 POSITIVE SUPPLY 80 60 NEGATIVE SUPPLY 40 20 0 0 0.1 1 10 100 1k 10k 100k FREQUENCY (Hz) 1M 60134 G19 0.1 1 10 100 1k 10k 100k FREQUENCY (Hz) 1M 60134 G22 60134fa 10 LT6013/LT6014 U W TYPICAL PERFOR A CE CHARACTERISTICS Output Impedance vs Frequency 1000 VS = 5V, 0V TA = 25°C AV = 10 40 OPEN-LOOP GAIN (dB) AV = 100 1 80 60 40 20 AV = 5 0.01 1 10 100 1k FREQUENCY (Hz) 10k 100k –160 GAIN 10 0 –30 –40 0.01 0.1 – 40 1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) –200 – 240 1k 10k 100k 1M FREQUENCY (Hz) 60134 G24 –280 10M 60134 G25 Gain vs Frequency, AV = –4 20 VS = 5V, 0V TA = 25°C VS = 5V, 0V TA = 25°C 16 CL = 500pF CL = 500pF 14 12 CL = 50pF GAIN (dB) GAIN (dB) PHASE 20 – 20 Gain vs Frequency, AV = 5 18 –120 30 –20 60134 G23 22 –80 –10 0 0.1 VS = 5V, 0V TA = 25°C RL = 10k 50 10 CL = 50pF 8 6 4 2 0 –2 1k 10k 100k FREQUENCY (Hz) –4 1M 10k 100k FREQUENCY (Hz) 1k 60134 G26 Small-Signal Transient Response 1M 60134 G27 Large-Signal Transient Response Rail-to-Rail Output Swing 5V 20mV/DIV 5V 1V/DIV 1V/DIV 0V AV = 5 PHASE SHIFT (DEG) OPEN-LOOP GAIN (dB) 100 10 60 VS = 5V, 0V TA = 25°C RL = 10k 120 100 OUTPUT IMPEDANCE (Ω) Gain and Phase vs Frequency Open-Loop Gain vs Frequency 140 2µs/DIV 60134 G28 AV = –4 VS = 5V, 0V RL = 2k 20µs/DIV 60134 G29 0V AV = –4 VS = 5V, 0V RL = 2k 100µs/DIV 60134 G30 60134fa 11 LT6013/LT6014 U W U U APPLICATIO S I FOR ATIO Not Unity-Gain Stable 3. Find the differential voltage that would appear across the two inputs of the op amp. The LT6013 and LT6014 amplifiers are optimized for the lowest possible noise and smallest package size, and are intentionally decompensated to be stable in a gain configuration of 5 or greater. Do not connect the amplifiers in a gain less than 5 (such as unity-gain). For a unity-gain stable amplifier with similar performance though slightly higher noise and lower bandwidth, see the LT6010 and LT6011/LT6012 datasheets. 4. The ratio of the output voltage to the input voltage is the gain that the op amp “sees”. This ratio must be 5 or greater. Do not place a capacitor bigger than 200pF between the output to the inverting input unless there is a 5 times larger capacitor from that input to AC ground. Otherwise, the op amp gain would drop to less than 5 at high frequencies, and the stability of the loop would be compromised. Figure 1 shows simple inverting and non-inverting op amp configurations and indicates how to achieve a gain of 5 or greater. For more general feedback networks, determine the gain that the op amp “sees” as follows: The LT6013 and LT6014 can be used in lower gain configurations when an impedance is connected between the op amp inputs. Figure 2 shows inverting and noninverting unity gain connections. The RC network across the op amp inputs results in a large enough noise gain at high frequencies, thereby ensuring stability. At low frequencies, the capacitor is an open circuit so the DC precision (offset and noise) remains very good. 1. Suppose the op amp is removed from the circuit. 2. Apply a small-signal voltage at the output node of the op amp. + VREF RG VIN + VIN – + VIN – RF – RF 60134 F01 RG VREF INVERTING: SIGNAL GAIN = –RF/RG OP AMP GAIN = 1 + RF/RG STABLE IF 1 + RF/RG ≥ 5 NONINVERTING: SIGNAL GAIN = 1 + RF/RG OP AMP GAIN = 1 + RF/RG STABLE IF 1 + RF/RG ≥ 5 UNITY-GAIN: DO NOT USE Figure 1. Use LT6013 and LT6014 in a Gain of 5 or Greater 10k 10k 10k + VIN VOUT 2.5k 1nF – – VIN VOUT 3k 1nF + 60134 F02 UNITY GAIN FOLLOWER UNITY GAIN INVERTER Figure 2. Stabilizing Op Amp for Unity Gain Operation 60134fa 12 LT6013/LT6014 U W U U APPLICATIO S I FOR ATIO Preserving Input Precision Preserving the input accuracy of the LT6013 and LT6014 requires that the applications circuit and PC board layout do not introduce errors comparable to or greater than the 10µV 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 allow high accuracy to be maintained with high impedance sources and feedback resistors. The LT6013 and LT6014 low input bias currents are obtained by a cancellation circuit on-chip. This causes the resulting I B+ and IB– 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 LT6013/LT6014 features on-chip back-to-back diodes between the input devices, along with 500Ω resistors in 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 LT6013/LT6014 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 LT6013 and LT6014 amplifiers contribute negligible noise to the system when driven by sensors (sources) with impedance between 10kΩ and 1MΩ. Throughout this range, total input noise is dominated by the 4kTRS noise of the source. If the source impedance is less than 10kΩ, the input voltage noise of the amplifier starts to contribute with a minimum noise of 9.5nV/√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 where en = 9.5nV/√Hz , in = 0.15pA/√Hz and RS is the total impedance at the input, including the source impedance. Capacitive Loads The LT6013 and LT6014 can drive capacitive loads up to 500pF at a gain of 5. 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. 60134fa 13 LT6013/LT6014 W W SI PLIFIED SCHE ATIC (One Amplifier) V+ R3 R4 R6 R5 Q7 Q18 Q6 Q8 RC1 Q5 Q4 Q3 D1 D2 +IN Q1 Q2 OUT D4 Q12 D5 Q14 Q17 C B A –IN C3 Q20 Q11 Q15 V– D3 Q22 Q16 R1 500Ω R2 500Ω Q13 C2 Q21 B A Q19 C1 Q9 Q10 60134 SS 60134fa 14 LT6013/LT6014 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 TOP MARK (NOTE 6) PACKAGE OUTLINE (DD8) DFN 1203 0.25 ± 0.05 4 0.25 ± 0.05 0.75 ±0.05 0.200 REF 0.50 BSC 2.38 ±0.05 (2 SIDES) 1 0.50 BSC 0.00 – 0.05 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. 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 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 .245 MIN 8 .160 ±.005 .030 ±.005 TYP 7 6 5 .053 – .069 (1.346 – 1.752) .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) 1 2 3 4 RECOMMENDED SOLDER PAD LAYOUT NOTE: 1. DIMENSIONS IN INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE .004 – .010 (0.101 – 0.254) .050 (1.270) BSC .014 – .019 (0.355 – 0.483) TYP .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) 0°– 8° TYP .016 – .050 (0.406 – 1.270) SO8 0303 60134fa 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 LT6013/LT6014 U TYPICAL APPLICATIO Low Power Hall Sensor Amplifier VS HALL ELEMENT ASAHI-KASEI HW-108A (RANK D) www.asahi-kasei.co.jp 1µF VS 4 LT1790-1.25 1, 2 3 6 400Ω ×4 + 100k 1% 2 + – 49.9k 10k OFFSET VS ADJUST 7.87k 1% 1 1/2 LT6014 2 1 8 + 499Ω 0.1µF VOUT 4 3 499Ω LT1782 49.9k – VS = 3V TO 18V IS = ~600µA VOUT = ~40mV/mT 6 26.7k 1% – 7 1/2 LT6014 5 + – 4 60134 TA02 Precision Micropower Photodiode Amplifier C1 20pF R1 100k VS+ IPHOTODIODE GAIN: AZ = 100kΩ = VOUT IPHOTODIODE 10% TO 90% RISE TIME: tr = 3.2µs BANDWIDTH: BW = 110kHz – 880nm IR PHOTODIODE λ OPTO-DIODE CORP ODD-45W LT6013 CD 170pF + – VS VOUT VS = ±1.35V TO ±18V C1, CD SATISFY GAIN OF 5 STABILITY REQUIREMENT AT AC OUTPUT OFFSET = 60µV MAX FOR LT6013AS8 60134 TA04 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1112/LT1114 Dual/Quad Low Power, Picoamp Input Precision Op Amps 250pA Input Bias Current LT1880 Rail-to-Rail Output, Picoamp Input Precision Op Amp SOT-23 LT1881/LT1882 LT1884/LT1885 Dual/Quad Rail-to-Rail Output, Picoamp Input Precision Op Amps CLOAD Up to 1000pF Dual/Quad Rail-to-Rail Output, Picoamp Input Precision Op Amps 9.5nV/√Hz Input Noise LT6011/LT6012 Dual/Quad Low Power Rail-to-Rail Output, Precision Op Amps 14nV/√Hz, Unity-Gain Stable Version of LT6014 LT6010 Single Low Power Rail-to-Rail Output, Precision Op Amp 200pA Input Bias Current, Shutdown Feature 60134fa 16 Linear Technology Corporation LT/TP 0404 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 2004