LT1101CJ8

LT1101 Precision, Micropower, Single Supply Instrumentation Amplifier (Fixed Gain = 10 or 100) DESCRIPTIO U FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ The LT®1101 establishes the following milestones: (1) It is the first micropower instrumentation amplifier, (2) It is the first single supply instrumentation amplifier, (3) It is the first instrumentation amplifier to feature fixed gains of 10 and/or 100 in low cost, space-saving 8-lead packages. Gain Error: 0.04% Max Gain Nonlinearity: 0.0008% (8ppm) Max Gain Drift: 4ppm/°C Max Supply Current: 105µA Max Offset Voltage: 160µV Max Offset Voltage Drift: 0.4µV/°C Typ Offset Current: 600pA Max CMRR, G = 100: 100dB Min 0.1Hz to 10Hz Noise: 0.9µVp-p Typ 2.3pAp-p Typ Gain Bandwidth Product: 250kHz Min Single or Dual Supply Operation Surface Mount Package Available The LT1101 is completely self-contained: no external gain setting resistor is required. The LT1101 combines its micropower operation (75µA supply current) with a gain error of 0.008%, gain linearity of 3ppm, gain drift of 1ppm/°C. The output is guaranteed to drive a 2k load to ±10V with excellent gain accuracy. Other precision specifications are also outstanding: 50µV input offset voltage, 130pA input offset current, and low drift (0.4µV/°C and 0.7pA/°C). In addition, unlike other instrumentation amplifiers, there is no output offset voltage contribution to total error. U APPLICATIO S ■ ■ ■ ■ ■ Differential Signal Amplification in Presence of Common Mode Voltage Micropower Bridge Transducer Amplifier – Thermocouples – Strain Gauges – Thermistors Differential Voltage-to-Current Converter Transformer Coupled Amplifier 4mA to 20mA Bridge Transmitter A full set of specifications are provided with ±15V dual supplies and for single 5V supply operation. The LT1101 can be operated from a single lithium cell or two Ni-Cad batteries. Battery voltage can drop as low as 1.8V, yet the LT1101 still maintains its gain accuracy. In single supply applications, both input and output voltages swing to within a few millivolts of ground. The output sinks current while swinging to ground—no external, power consuming pull down resistors are needed. , LTC and LT are registered trademarks of Linear Technology Corporation. U TYPICAL APPLICATIO Gain Error Distribution GROUND 1 (REF) 8 9R 9R R – 20 G = 100 RL = 50k TA = 25°C 930 UNITS TESTED IN ALL PACKAGES 15 10 B R ≈ 9.2k + A + 7 SHORT TO 8 G = 10 N.C. G = 100 R – INVERTING 3 INPUT 4 V– 25 90R PERCENT OF UNITS 90R SHORT TO 1, 2 G = 10 N.C. G = 100 30 OUTPUT GROUND PIN 1, OUTPUT AT PIN 8 G = 100: NO ADDITIONAL CONNECTIONS G = 10: SHORT PIN 2 TO PIN 1, SHORT PIN 7 TO PIN 8 6 NONINVERTING INPUT 5 + V LT1101 • TA01 5 0 –0.04 –0.03 –0.02 –0.01 0 0.01 0.02 0.03 0.04 GAIN ERROR (%) LT1101 • TA02 1101fa 1 LT1101 RATI GS (Note 1) W Supply Voltage ...................................................... ±22V Differential Input Voltage ....................................... ±36V Input Voltage ............... Equal to Positive Supply Voltage ..........10V Below Negative Supply Voltage Output Short Circuit Duration .......................... Indefinite Operating Temperature Range LT1101AM/LT1101M (OBSOLETE) ... – 55°C to 125°C LT1101AI/LT1101I .............................. –40°C to 85°C LT1101AC/LT1101C ................................ 0°C to 70°C Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C U U W PACKAGE/ORDER I FOR ATIO TOP VIEW OUTPUT 8 OUT G = 10 90R 7 90R R 9R – + –IN 3 GROUND (REF) 1 8 90R 9R 6 +IN R R – + –IN 3 5 V+ 9R NC 1 OUTPUT NC 3 REF 4 G = 10 –IN 5 OUT 7 G = 10 6 +IN NC 6 V– 7 R ≈ 9.2k V– 4 4 V – (CASE) H PACKAGE 8-LEAD TO-5 METAL CAN TJMAX = 150°C, θJA = 150°C/W, θJC = 45°C/W 5 V+ 15 OUTPUT 90R 90R 9R 9R R – + 14 NC 13 OUT G = 10 R R ≈ 9.2k 12 +IN 11 NC 10 V + NC 8 9 N PACKAGE 8-LEAD PDIP TJMAX = 150°C, θJA = 130°C/W SW PACKAGE 16-LEAD PLASTIC SO J PACKAGE 8-LEAD CERDIP TJMAX = 150°C, θJA = 100°C/W TJMAX = 150°C, θJA = 100°C/W ORDER PART NUMBER ORDER PART NUMBER LT1101AMH LT1101MH LT1101ACH LT1101CH 16 NC GND (REF) 2 90R REF G = 10 2 9R R + – REF 2 G = 10 TOP VIEW + – GROUND (REF) 1 TOP VIEW + – W W AXI U U ABSOLUTE LT1101AMJ8 LT1101MJ8 LT1101ACJ8 LT1101CJ8 NC ORDER PART NUMBER LT1101SW LT1101ISW LT1101AIN8 LT1101IN8 LT1101ACN8 LT1101CN8 OBSOLETE PACKAGES Consider the N8 as an Alternate Source Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS otherwise noted. (Note 4) VS = 5V, 0V, VCM = 0.1V, VREF(PIN 1) = 0.1V, G = 10 or 100, TA = 25°C, unless SYMBOL PARAMETER CONDITIONS GE Gain Error G = 100, V0 = 0.1V to 3.5V, RL = 50k G = 10, V0 = 0.1V to 3.5V, RL = 50k GNL Gain Nonlinearity G = 100, RL = 50k G = 10, RL = 50k (Note 2) VOS Input Offset Voltage LT11O1AM/AI/AC MIN TYP MAX MIN LT1101M/I/C TYP MAX UNITS 0.010 0009 0.050 0.040 0.011 0.010 0.075 0.060 20 3 60 7 20 3 75 8 ppm ppm 50 160 60 250 220 600 µV µV 0.13 0.60 0.15 0.90 nA nA LT1101SW lOS Input Offset Current IB Input Bias Current 6 8 6 10 IS Supply Current 75 105 78 120 % % µA 1101fa 2 LT1101 ELECTRICAL CHARACTERISTICS otherwise noted. (Note 4) VS = 5V, 0V, VCM = 0.1V, VREF(PIN 1) = 0.1V, G = 10 or 100, TA = 25°C, unless LT11O1AM/AI/AC MIN TYP MAX SYMBOL PARAMETER CONDITIONS CMRR Common Mode Rejection Ratio 1k Source Imbalance G = 100, VCM = 0.07V to 3.4V G = 10, VCM = 0.07V to 3.1V Minimum Supply Voltage (Note 5) Maximum 0utput Voltage Swing Output High, 50k to GND Output High, 2k to GND Output Low, VREF = 0, No Load Output Low, VREF = 0, 2k to GND Output Low, VREF = 0, lSINK = 100µA 4.1 3.5 VO 95 84 106 100 1.8 4.3 3.9 3.3 0.5 90 MIN 92 82 2.3 LT1101M/I/C TYP MAX 105 99 1.8 4.1 3.5 6 1 130 4.3 3.9 3.3 0.5 90 UNITS dB dB 2.3 V 6 1 130 V V mV mV mV BW Bandwidth G = 100 (Note 2) G = 10 (Note 2) 2.0 22 3.0 33 2.0 22 3.0 33 kHz kHz SR Slew Rate (Note 2) 0.04 0.07 0.04 0.07 V/µs LT1101AM/AI/AC MIN TYP MAX MIN VS = ±15V, VCM = 0V, TA = 25°C, Gain = 10 or 100, unless otherwise noted. SYMBOL PARAMETER CONDITIONS GE Gain Error G = 100, VO = ±10V, RL = 50k G = 100, VO = ±10V, RL = 2k G = 100, VO = ±10V, RL = 50k or 2k GNL Gain Nonlinearity G = 100, RL = 50k G = 100, RL = 2k G = 10, RL = 50k or 2k VOS Input Offset Voltage lOS Input Offset Current IB Input Bias Current en in 0.040 0.055 0.040 0.009 0.012 0.009 0.060 0.070 0.060 7 24 3 16 45 8 8 25 3 20 60 9 ppm ppm ppm 50 160 60 250 220 600 µV µV 0.13 0.60 0.15 0.90 nA 6 8 6 10 nA Input Resistance Common Mode Differential Mode (Note 2) (Note 2) Input Noise Voltage 0.1Hz to 10Hz (Note 3) 0.9 Input Noise Voltage Density fO = 10Hz (Note 3) fO = 1000Hz (Note 3) Input Noise Current 7 12 3 5 % % % 7 12 GΩ GΩ 1.8 0.9 µVp-p 45 43 64 54 45 43 nV/√Hz nV/√Hz 0.1Hz to 10Hz (Note 3) 2.3 4.0 2.3 pAp-p Input Noise Current Density fO =10Hz (Note 3) fO = 1000Hz 0.06 0.02 0.10 0.06 0.02 pA/√Hz pA/√Hz lnput Voltage Range G = 100 G = 10 CMRR UNITS 0.008 0.011 0.008 LT1101SW 4 7 LT1101M/I/C TYP MAX 13.0 – 14.4 11.5 – 13.0 13.8 – 14.7 12.5 – 13.3 13.0 – 14.4 11.5 – 13.0 13.8 – 14.7 12.5 – 13.3 V V V V Common Mode Rejection Ratio 1k Source Imbalance G = 100, Over CM Range G = 10, Over CM Range 100 84 112 100 98 82 112 99 dB dB PSRR Power Supply Rejection Ratio VS = +2.2V, –0.1V to ±18V 102 114 100 114 dB IS Supply Current 92 130 94 150 µA 1101fa 3 LT1101 ELECTRICAL CHARACTERISTICS VS = ±15V, VCM = 0V, TA = 25°C, Gain = 10 or 100, unless otherwise noted. MIN LT1101M/I TYP 14.2 13.2 13.0 11.0 14.2 13.2 V V 2.3 25 3.5 37 2.3 25 3.5 37 kHz kHz 0.06 0.10 0.06 0.10 V/µs SYMBOL PARAMETER CONDITIONS MIN VO Maximum 0utput Voltage Swing RL = 50k RL = 2k 13.0 11.0 BW Bandwidth G = 100 (Note 2) G = 10 (Note 2) SR Slew Rate LT1101AM/AI TYP MAX MAX UNITS ELECTRICAL CHARACTERISTICS VS = ±15V, VCM = 0V, Gain = 10 or 100, –55°C ≤ TA ≤ 125°C for AM/M grades, –40°C ≤ TA ≤ 85°C for AI/I grades, unless otherwise noted. SYMBOL PARAMETER CONDITIONS GE Gain Error G = 100, VO = ±10V, RL = 50k G = 100, VO = ±10V, RL = 5k G = 10, VO = ±10V, RL = 50k or 5k TCGE Gain Error Drift (Note 2) GNL Gain Nonlinearity VOS Input Offset Voltage MIN LT1101AM/AI TYP MAX MIN LT1101M/I TYP MAX UNITS % % % 0.024 0.030 0.015 0.070 0.100 0.070 0.026 0.035 0.018 0.100 0.130 0.100 G = 100, RL = 50k G = 100, RL = 5k G = 10, RL = 50k or 5k 2 2 1 4 7 4 2 2 1 5 8 5 G = 100, RL = 50k G = 100, RL = 5k G = 10, RL = 50k G = 10, RL = 5k 24 70 4 10 70 300 13 40 26 75 5 12 90 500 15 60 ppm ppm ppm ppm 90 350 110 110 500 950 µV µV 0.4 2.0 0.5 0.5 2.8 4.8 µV/°C mV/°C 0.16 0.80 0.19 1.30 nA 0.5 4.0 0.8 7.0 pA/°C 7 10 7 12 nA 10 25 10 30 pA/°C LT1101ISW (Note 2) LT1101ISW ppm/°C ppm/°C ppm/°C ∆VOS/∆T Input Offset Voltage Drift lOS Input Offset Current ∆lOS/∆T Input Offset Current Drift IB Input Bias Current ∆IB/∆T Input Bias Current Drift (Note 2) CMRR Common Mode Rejection Ratio G = 100, VCM = –14.4V to 13V G = 100, VCM = –13V to 11.5V 96 80 111 99 94 78 111 98 dB dB PSRR Power Supply Rejection Ratio VS = 3.0, –0.1V to ±18V 98 110 94 110 dB IS Supply Current VO Maximum 0utput Voltage Swing (Note 2) 105 RL = 50k RL = 5k 12.5 11.0 14.0 13.5 165 108 12.5 11.0 14.0 13.5 190 µA V V 1101fa 4 LT1101 ELECTRICAL CHARACTERISTICS otherwise noted. VS = ±15V, VCM = 0V, Gain = 10 or 100, 0°C ≤ TA ≤ 70°C, unless LT1101AC TYP MAX 0.012 0.018 0.009 G = 100, RL = 50k G = 100, RL = 2k G = 10, RL = 50k or 5k G = 100, RL = 50k G = 100, RL = 2k G = 10, RL = 50k or 2k SYMBOL PARAMETER CONDITIONS GE Gain Error G = 100, VO = ±10V, RL = 50k G = 100, VO = ±10V, RL = 2k G = 10, VO = ±10V, RL = 50k or 2k TCGE Gain Error Drift (Note 2) GNL Gain Nonlinearity VOS Input Offset Voltage MIN LT1101C/S TYP MAX UNITS 0.055 0.085 0.055 0.014 0.020 0.010 0.080 0.100 0.080 % % % 1 2 1 4 7 4 1 2 1 5 9 5 9 33 4 25 75 10 10 36 4 35 100 11 ppm ppm ppm 70 250 85 300 350 800 µV µV 0.4 2.0 0.5 1.2 2.8 4.5 µV/°C µV/°C 0.14 0.70 0.17 1.10 nA 0.5 4.0 0.8 7.0 pA/°C 6 9 6 11 nA 10 25 10 30 pA/°C MIN LT1101SW (Note 2) LT1101SW ppm/°C ppm/°C ppm/°C ∆VOS/∆T Input Offset Voltage Drift lOS Input Offset Current ∆IOS/∆T Input Offset Current Drift IB Input Bias Current ∆IB/∆T Input Bias Current Drift (Note 2) CMRR Common Mode Rejection Ratio G = 100, VCM = –14.4V to 13V G = 100, VCM = –13V to 11.5V 98 82 112 100 96 80 112 99 dB dB PSRR Power Supply Rejection Ratio VS = 2.5, –0.1V to ±18V 100 112 97 112 dB IS Supply Current VO Maximum 0utput Voltage Swing (Note 2) 98 RL = 50k RL = 2k ±12.5 ±10.5 ±14.1 ±13.0 148 100 ±12.5 ±10.5 ±14.1 ±13.0 170 µA V V 1101fa 5 LT1101 ELECTRICAL CHARACTERISTICS VS = 5V, 0V, VCM = 0.1V, VREF(PIN 1) = 0.1V, Gain = 10 or 100, – 40°C ≤ TA ≤ 85°C for AI/I grades, unless otherwise noted (Note 4). SYMBOL PARAMETER CONDITIONS GE Gain Error G = 100, V0 = 0.1V to 3.5V, RL = 50k G = 10, VCM = 0.15, RL = 50k TCGE Gain Error Drift GNL Gain Nonlinearity VOS Input Offset Voltage MIN LT1101AM/AI TYP MAX MIN LT1101M/I TYP MAX UNITS % % 0.026 0.011 0.080 0.070 0.028 0.014 0.120 0.100 RL = 50k (Note 2) 1 4 1 5 G = 100, RL = 50k G = 10, RL = 50k (Note 2) 45 4 110 13 48 5 140 15 ppm ppm 90 350 110 110 500 950 µV µV 0.4 2.0 0.5 0.5 2.8 4.8 µV/°C µV/°C 0.16 0.80 0.19 1.30 nA 0.5 4.0 0.8 7.0 pA/°C 7 10 7 12 nA 10 25 10 30 pA/°C LT1101ISW ∆VOS/∆T Input Offset Voltage Drift (Note 2) LT1101ISW lOS Input Offset Current ∆VOS/∆T Input Offset Current Drift IB Input Bias Current ∆IB/∆T Input Bias Current Drift (Note 2) CMRR Common Mode Rejection Ratio G = 100, VCM = 0.1V to 3.2V G = 10, VCM = 0.1V to 2.9V, VREF = 0.15V IS Supply Current V0 Maximum 0utput Voltage Swing (Note 2) 91 80 105 98 88 Output High, 50k to GND Output High, 2k to GND Output Low, VREF = 0, No Load Output Low, VREF = 0, 2k to GND Output Low, VREF = 0, ISINK = 100µA 3.8 3.0 4.1 3.7 4.5 0.7 125 88 77 135 92 3.8 3.0 8 1.5 170 104 97 4.1 3.7 4.5 0.7 125 ppm/°C dB dB 160 µA 8 1.5 170 V V mV mV mV 1101fa 6 LT1101 ELECTRICAL CHARACTERISTICS 0°C ≤ TA ≤ 70°C, unless otherwise noted (Note 4). VS = 5V, 0V, VCM = 0.1V, VREF(PIN 1) = 0.1V, Gain = 10 or 100, SYMBOL PARAMETER CONDITIONS GE Gain Error G = 100, VO = 0.1V to 3.5V, RL = 50k G = 10, VCM = 0.15V, RL = 50k TCGE Gain Error Drift GNL Gain Nonlinearity VOS Input Offset Voltage MIN LT1101AC TYP MAX MIN LT1101C/S TYP MAX UNITS % % 0.017 0.010 0.065 0.060 0.018 0.012 0.095 0.080 RL = 50k (Note 2) 1 4 1 5 G = 100, RL = 50k G = 10, RL = 50k (Note 2) 25 4 80 10 25 4 100 11 ppm ppm 70 250 85 300 350 800 µV µV 0.4 2.0 0.5 1.2 2.8 4.5 µV/°C µV/°C 0.14 0.70 0.17 1.10 nA 0.5 4.0 0.8 7 pA/°C 6 9 6 11 nA 10 25 10 30 pA/°C LT1101SW ∆VOS/∆T Input Offset Voltage Drift (Note 2) LT1101SW lOS Input Offset Current ∆IOS/∆T Input Offset Current Drift IB Input Bias Current ∆IB/∆T Input Bias Current Drift (Note 2) CMRR Common Mode Rejection Ratio G = 100, VCM = 0.07V to 3.3V G = 10, VCM = 0.07V to 3V, VREF = 0.15V IS Supply Current VO Maximum 0utput Voltage Swing (Note 2) 93 82 105 99 80 Output High, 50k to GND Output High, 2k to GND Output Low, VREF = 0, No Load Output Low, VREF = 0, 2k to GND Output Low, VREF = 0, ISINK = 100µA Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: This parameter is not tested. It is guaranteed by design and by inference from other tests. Note 3: This parameter is tested on a sample basis only. 4.0 3.3 4.2 3.8 4 0.6 100 90 80 120 7 1.2 150 104 98 85 4.0 3.3 ppm/°C 4.2 3.8 4 0.6 100 dB dB 145 µA 7 1.2 150 V V mV mV mV Note 4: These test conditions are equivalent to VS = 4.9V, – 0.1V, VCM = 0V, VREF(PIN1) = 0V. Note 5: Minimum supply voltage is guaranteed by the power supply rejection test. The LT1101 actually works at 1.8V supply with minimal degradation in performance. 1101fa 7 LT1101 U W TYPICAL PERFOR A CE CHARACTERISTICS 30 50 VS = ± 15V TA = 25°C RL ≥ 50kΩ 25 20 PERCENT OF UNITS 708 UNITS TESTED IN ALL PACKAGES 15 10 Gain vs Frequency 40 VS = ± 15V TA = 25°C RL ≥ 2kΩ 30 708 UNITS TESTED IN ALL PACKAGES 20 VS = ± 15V TA = 25°C 40 G = 100 0 –0.5 30 –1.0 –1.5 G = 10 0 20 GAIN (dB) PERCENT OF UNITS Gain = 10 Nonlinearity Distribution GAIN ERROR (%) Gain = 100 Nonlinearity Distribution –0.5 10 5 0 16 0 18 –1.5 2 6 8 4 GAIN NONLINEARITY (PPM) 0 LT1101 • TPC01 Gain Error Over Temperature 4 6 0.01 7 GAIN NONLINEARITY (PPM) 0.02 1 VOLTAGE GAIN ERROR (%) 0.03 50 25 0 75 TEMPERATURE (°C) 100 SEE GAIN VS T FOR DEFINITIONS 50 4 40 30 2 20 OFFSET CURRENT (pA) VS = 5V, 0V 200 BIAS CURRENT (nA) 90 70 60 50 25 75 0 TEMPERATURE (°C) 100 10 6 7 50 25 75 0 TEMPERATURE (°C) 100 0 125 –200 125 LT1101 • TPC07 –100 200 0 100 INPUT OFFSET VOLTAGE (µV) LT1101 • TPC06 –5 Input Bias Current vs Common Mode Voltage 0 VS = 5V, 0V TO ±15V 150 VS = 5V, 0V –2 IOS 100 80 50 –50 –25 20 Input Bias and Offset Currents vs Temperature VS = ±15V TA = 25°C 746 UNITS MEASURED IN ALL PACKAGES EACH UNIT MEASURED AT VS = 15V, 0V AND AT VS = ±15V LT1101 • TPC05 Supply Current vs Temperature 100 1M 5 LT1101 • TPC04 SUPPLY CURRENT (µA) 30 3 0 –50 –25 125 110 100k Input Offset Voltage Distribution 1 10 5 0 –50 –25 1k 10k FREQUENCY (Hz) LT1101 • TPC03 Gain Nonlinearity Temperature 60 G = 100, VS = ± 15V, RL = 2k G = 10, VS = ± 15V, RL = 2k G = 100, VS = ± 15V, RL = 5k G = 100, VS = 5V, 0V, RL = 50k 2 G = 100, VS = ± 15V, RL = 50k G = 10, VS = ± 15V, RL = 5k G = 10, VS = ± 15V or 5V, 0V, 3 RL = 50k 100 LT1101 • TPC02 0.05 1 2 3 4 5 6 7 10 10 PERCENT OF UNITS 6 4 8 10 12 14 GAIN NONLINEARITY (PPM) INPUT BIAS CURRENT (nA) 2 0 0.04 10 –1.0 IB –6 –7 – 50 – 25 –4 TA = 25°C –6 TA = –55°C TA = 125°C –8 –10 50 25 0 75 TEMPERATURE (°C) 100 125 LT1101 • TPC08 –12 –1 0 1 2 3 COMMON MODE VOLTAGE (V) 4 LT1101 • TPC09 1101fa 8 LT1101 U W TYPICAL PERFOR A CE CHARACTERISTICS Common Mode Rejection Ratio vs Frequency 80 60 40 V + –1 25°C V + –3 G = 10 ALL TEMPERATURES V– 1 G = 10 G = 100 10 100 1k FREQUENCY (Hz) 1 10k ±2 ±4 ±6 ±8 ±10 ±12 ±14 ±16 ±18 SUPPLY VOLTAGE (V) ISINK = 1µA 10 NO LOAD V+ –1 0 25 50 75 25°C –55°C V– 2 125°C 25°C V– 1 V– 0.01 0.1 1 10 SOURCING OR SINKING LOAD CURRENT (mA) 125 TEMPERATURE (°C) PEAK-TO-PEAK OUTPUT SWING, VS = ± 15V (V) TA = 25°C 80 G = 10 60 G = 100 40 20 0 1 10 CAPACITIVE LOAD (nF) TA = 25°C, VS = 5V, 0V TA = 25°C, VS = ± 15V 20 10 TA = 125°C, VS = 5V, 0V 0 TA = 125°C, VS = ± 15V –10 TA = 125°C, VS = ± 15V –20 TA = 5°C, VS = ± 15V –30 –40 1 2 3 0 TIME FROM OUTPUT SHORT TO GROUND (MINUTES) LT1101 • TPC15 Undistorted Output Swing vs Frequency Capacitive Load Handling 100 100k 30 LT1101 • TPC14 LT1101 • TPC13 VS = ± 2.0V TO ± 15V 1k 10k FREQUENCY (Hz) Short-Circuit Current vs Time –55°C 100 100 LT1101 • TPC12 V+ –2 RL = 5k TO GROUND OVERSHOOT (%) 10 40 125°C ISINK = 10µA 0.1 20 Output Voltage Swing vs Load Current OUTPUT VOLTAGE SWING (V) SATURATION VOLTAGE (mV) 100 100 40 LT1101 • TPC11 ISINK = 2mA ISINK = 100µA NEGATIVE SUPPLY 60 30 Output Impedance vs Frequency TA = 25°C LOAD, RL, TO GROUND 5 VS = 5V, 0V, RL ≥ 100k 20 4 VS = ±15V RL ≥ 100k VS = 5V, 0V, RL ≥ 1k 3 10 2 VS = ±15V RL ≥ 30k 0 100 1k 10k FREQUENCY (Hz) 1 100 0 1k OUTPUT IMPEDANCE (Ω) VS = 5V, 0V POSITIVE SUPPLY 80 V+ ISINK = 1mA 120 100 0 0 Output Saturation vs Temperature vs Sink Current 1 –50 –25 TA = 25°C V– 100k LT1101 • TPC10 1000 – 55°C V– 2 VS = ± 15V TA = 25°C 0.1 125°C V + –2 SHORT-CIRCUIT CURRENT (mA) SINKING SOURCING 0 125°C 25°C PEAK-TO-PEAK OUTPUT SWING, VS = 5V, 0V (V) 20 – 55°C POWER SUPPLY REJECTION RATIO (dB) G = 10 120 G = 100 G = 100 100 Power Supply Rejection Ratio vs Frequency V+ G = 100 C = 82pF PIN 1 TO PIN 2 COMMON MODE RANGE (V) COMMON MODE REJECTION RATIO (dB) 120 Common Mode Range vs Supply Voltage 100 G = 100 10 G = 10 1 0.1 10 10k 100 1k FREQUENCY (Hz) 100k LT1101 • TPC16 LT1101 • TPC17 LT1101 • TPC18 1101fa 9 LT1101 U W TYPICAL PERFOR A CE CHARACTERISTICS VS = ± 2.5V TO ± 15V TA = 25°C 300 CURRENT NOISE 100 VOLTAGE NOISE 30 1/f CORNER 0.6Hz 10 0.1 0.8 CHANGE IN OFFSET VOLTAGE (µV) VOLTAGE NOISE DENSITY (nV/√Hz) VOLTAGE NOISE DENSITY (fA/√Hz) 1000 Large Signal Transient Response G = 10, VS = 5V, 0V Warm-Up Drift VS = ± 15V TA = 25°C WARM UP DRIFT 0.6 AT VS = 5V, 0V IS IMMEASURABLY LOW 1V/DIV Noise Spectrum 0.4 0.2 50µs/DIV OUTPUT FROM 0V TO 4.5V, NO LOAD 0 1 10 100 FREQUENCY (Hz) 1000 0 1 2 TIME AFTER POWER ON (MINUTES) LT1101 • TPC20 LT1101 • TPC19 Large Signal Transient Response G = 100, VS = 5V, 0V Large Signal Transient Response G = 100, VS = ±15V 5V/DIV 1V/DIV Large Signal Transient Response G = 10, VS = 15V 5V/DIV LT1101 • TPC20.1 3 200µs/DIV NO LOAD 100µs/DIV OUTPUT FROM 0V TO 4.5V, NO LOAD 200µs/DIV NO LOAD LT1101 • TPC20.2 LT1101 • TPC20.3 20µs/DIV OUTPUT FROM 0.05V TO 0.15V, NO LOAD LT1101 • TPC20.5 Small Signal Transient Response G = 100, VS = 5V, 0V Small Signal Transient Response G = 10, VS = ±15V 20V/DIV 20mV/DIV 20mV/DIV Small Signal Transient Response G = 10, VS = 5V, 0V LT1101 • TPC20.4 20µs/DIV LT1101 • TPC20.6 200µs/DIV OUTPUT FROM 0.05V TO 0.15V, NO LOAD (RESPONSE WITH VS = ±15V, G = 100 IS IDENTICAL) LT1101 • TPC20.7 1101fa 10 LT1101 U W TYPICAL PERFOR A CE CHARACTERISTICS Single Supply: Minimum Output Voltage vs Common Mode Voltage 10 125°C 100 G = 10 25°C 80 –55°C 60 125°C 25°C 40 –55°C 20 0 G = 100 0 2 V+ = 1.8V TO 15V V– = OV 4 6 8 OUTPUT VOLTAGE (V) 10 2.5 V+ = 1.8V TO 15V V– = OV NO LOAD 9 COMMON MODE VOLTAGE (V) MINIMUM COMMON MODE VOLTAGE (V) 120 8 25°C 7 –55°C 6 25°C 125°C 5 4 G = 100 –55°C 125°C 3 2 G = 10 1 12 0 10 20 30 40 50 60 70 80 90 100 MINIMUM OUTPUT VOLTAGE (mV) 0 LT1101 • TPC21 Minimum Supply Voltage vs Temperature MINIMUM SUPPLY, OUTPUT SWING, COMMON MODE RANGE (V) Single Supply: Minimum Common Mode Voltage vs Output Voltage V – = 0V 2.0 MINIMUM SUPPLY VOLTAGE OUTPUT SWING AT MINIMUM SUPPLY 1.5 1.0 0.5 COMMON-MODE RANGE AT MINIMUM SUPPLY 0 –50 –25 50 25 0 75 TEMPERATURE (°C) LT1101 • TPC22 100 125 LT1101 • TPC23 U W U U APPLICATIO S I FOR ATIO Single Supply Applications The LT1101 is the first instrumentation amplifier which is fully specified for single supply operation, (i.e. when the negative supply is 0V). Both the input common mode range and the output swing are within a few millivolts of ground. Probably the most common application for instrumentation amplifiers is amplifying a differential signal from a transducer or sensor resistance bridge. All competitive instrumentation amplifiers have a minimum required common mode voltage which is 3V to 5V above the negative supply. This means that the voltage across the bridge has to be 6V to 10V or dual supplies have to be used (i.e., micropower) single battery usage is not attainable on competitive devices. The minimum output voltage obtainable on the LT1101 is a function of the input common mode voltage. When the common mode voltage is high and the output is low, current will flow from the output of amplifier A into the output of amplifier B. See the Minimum Output Voltage vs Common Mode Voltage plot. Similarly, the Single Supply Minimum Common Mode Voltage vs Output Voltage plot specifies the expected common mode range. When the output is high and input common mode is low, the output of amplifier A has to sink current coming from the output of amplifier B. Since amplifier A is effectively in unity gain, its input is limited by its output. Common Mode Rejection vs Frequency The common mode rejection ratio (CMRR) of the LT1101 starts to roll off at a relatively low frequency. However, as shown on the Common Mode Rejection Ratio vs Frequency plot, CMRR can be enhanced significantly by connecting an 82pF capacitor between pins 1 and 2. This improvement is only available in the gain 100 configuration, and it is in excess of 30dB at 60Hz. Offset Nulling The LT1101 is not equipped with dedicated offset null terminals. In many bridge transducer or sensor applications, calibrating the bridge simultaneously eliminates the instrumentation amplifier’s offset as a source of error. For example, in the Micropower Remote Temperature Sensor Application shown, one adjustment removes the offset errors due to the temperature sensor, voltage reference and the LT1101. 1101fa 11 LT1101 U W U U APPLICATIO S I FOR ATIO A simple resistive offset adjust procedure is shown below. If R = 5Ω for G = 10, and R = 50Ω for G = 100, then the effect of R on gain error is approximately 0.006%. Unfortunately, about 450µA has to flow through R to bias the reference terminal (Pin 1) and to null out the worstcase offset voltage. The total current through the resistor network can exceed 1mA, and the micropower advantage of the LT1101 is lost. 15V 10k 3 5 – 8 LT1101 6 + OUT R 10k – 15V LT1101 • AI01 Another offset adjust scheme uses the LT1077 micropower op amp to drive the reference Pin 1. Gain error and common mode rejection are unaffected, the total current increase is 45µA. The offset of the LT1077 is trimmed and amplified to match and cancel the offset voltage of the LT1101. Output offset null range is ±25mV. 1.2V TO 18V 5 8 LT1101 6 + Rx Gain = 10 + R+Rx/90 The nominal value of R is 9.2kΩ. The usefulness of this method is limited by the fact that R is not controlled to better than ±10% absolute accuracy in production. However, on any specific unit, 90R can be measured between Pins 1 and 2. Input Protection 10k 20k – Gains between 10 and 100 can be achieved by connecting two equal resistors (= Rx) between Pins 1 and 2 and Pins 7 and 8. 1 4 3 Gains Between 10 and 100 Instrumentation amplifiers are often used in harsh environments where overload conditions can occur. The LT1101 employs PNP input transistors, consequently the differential input voltage can be ±30V (with ±15V supplies, ±36V with ±18V supplies) without an increase in input bias current. Competitive instrumentation amplifiers have NPN inputs which are protected by back-to-back diodes. When the differential input voltage exceeds ±1.3V on these competitive devices, input current increases to the milliampere level; more than ±10V differential voltage can cause permanent damage. When the LT1101’s inputs are pulled above the positive supply, the inputs will clamp a diode voltage above the positive supply. No damage will occur if the input current is limited to 20mA. 5k POT 500Ω resistors in series with the inputs protect the LT1101 when the inputs are pulled as much as 10V below the negative supply. OUT 1 1 8 4 7 6 3 LT1077 4 100k + – 2 3.3k –1.2V TO –18V LT1101 • AI02 1101fa 12 LT1101 U W U U APPLICATIO S I FOR ATIO 4mA to 20mA Loop Receiver Micropower, Battery Operated Remote Temperature Sensor 3V 12V 390k REMOTE TEMP SENSOR 75k LM134-3 LT1004-1.2 75k LT1004-1.2 75k ILOOP 6 5 + 2210Ω 7 8 LT1101 62.5Ω 62Ω – 6 + 7 LT1101 G = 10 20k OUTPUT 4 – 2 1 8 4 18k OUT 10mV/°C 2 4mA TO 20mA IN – OV TO 10V OUT TRIM OUTPUT TO 5V AT 12mA IN 1 100nA °K 5k 5 3 2k POT 3 10k LT1101 • AI04 TRIM OUTPUT TO 250mV AT 25°C TEMPERATURE RANGE = 2.5°C TO 150°C ACCURACY = ±0.5°C LT1101 • AI03 Voltage Controlled Current Source Instrumentation Amplifier with ±150mA Output Current V+ = 15V VIN 6 5 + 8 LT1101 3 3 LT1010 + – OUT 8 1 R 4 4 – 9V 5 LT1101 2k 7 6 –1.5V 2 IOUT 1 RL V – = –15V GAIN = 10, DEGRADED BY 0.01% DUE TO LT1010 OUTPUT = ±10V INTO 75Ω (TO 1.5kHz) DRIVES ANY CAPACITIVE LOAD SINGLE SUPPLY APPLICATION (V+ = 5V, V– = OV): VOUT MIN = 120mV, VOUT MAX = 3.4V IOUT = 100VIN R IOUT = 0mA TO 5mA VOLTAGE COMPLIANCE = 6.4V (R ≤ 200Ω) LT1101 • AI06 LT1101 • AI05 1101fa 13 LT1101 U W U U APPLICATIO S I FOR ATIO Differential Voltage Amplification from a Resistance Bridge V+ R TRANSDUCER OR SENSOR R 6 RESISTANCE BRIDGE R R 5 + 8 LT1101 G = 100 3 OUT 4 – 1 SHIELD MINIMUM VOLTAGE ACROSS BRIDGE = 20mV MINIMUM SUPPLY VOLTAGE = 1.8V LT1101 • AI07 Gain = 20, 110 or 200 Instrumentation Amplifier Single Ended Output Differential Output 6 + + LT1101 3 IN – 3 + + OUT IN – – 6 LT1101 – 8 3 – 8 OUT 1 + + LT1101 3 + LT1101 1 – 6 6 8 – 8 1 1 GAIN = 200, AS SHOWN GAIN = 20, SHORT PIN 1 TO PIN 2, PIN 7 TO PIN 8 ON BOTH DEVICES GAIN = 110, SHORT PIN 1 TO PIN 2, PIN 7 TO PIN 8 ON ONE DEVICE, NOT ON THE OTHER INPUT REFERRED NOISE IS REDUCED BY √2 (G = 200 OR 20) LT1101 • AI08 1101fa 14 LT1101 U PACKAGE DESCRIPTIO H Package 8-Lead TO-5 Metal Can (.200 Inch PCD) (Reference LTC DWG # 05-08-1320) .335 – .370 (8.509 – 9.398) DIA .305 – .335 (7.747 – 8.509) .040 (1.016) MAX .050 (1.270) MAX SEATING PLANE .165 – .185 (4.191 – 4.699) GAUGE PLANE .010 – .045* (0.254 – 1.143) REFERENCE PLANE .500 – .750 (12.700 – 19.050) .016 – .021** (0.406 – 0.533) .027 – .045 (0.686 – 1.143) PIN 1 45°TYP .028 – .034 (0.711 – 0.864) .200 (5.080) TYP .110 – .160 (2.794 – 4.064) INSULATING STANDOFF *LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE AND THE SEATING PLANE .016 – .024 **FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS (0.406 – 0.610) H8(TO-5) 0.200 PCD 0801 J8 Package 8-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) CORNER LEADS OPTION (4 PLCS) .023 – .045 (0.584 – 1.143) HALF LEAD OPTION .045 – .068 (1.143 – 1.650) FULL LEAD OPTION .005 (0.127) MIN .405 (10.287) MAX 8 7 6 5 .025 (0.635) RAD TYP .220 – .310 (5.588 – 7.874) 1 2 3 .300 BSC (7.62 BSC) 4 .200 (5.080) MAX .015 – .060 (0.381 – 1.524) .008 – .018 (0.203 – 0.457) 0° – 15° NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS .045 – .065 (1.143 – 1.651) .014 – .026 (0.360 – 0.660) .100 (2.54) BSC .125 3.175 MIN J8 0801 OBSOLETE PACKAGES 1101fa 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 LT1101 U PACKAGE DESCRIPTIO N8 Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) .300 – .325 (7.620 – 8.255) +.035 .325 –.015 8.255 +0.889 –0.381 .400* (10.160) MAX .065 (1.651) TYP .009 – .015 (0.229 – 0.381) ( .130 ± .005 (3.302 ± 0.127) .045 – .065 (1.143 – 1.651) (0.457 ± 0.076) 7 6 5 1 2 3 4 .255 ± .015* (6.477 ± 0.381) .125 (3.175) .020 MIN (0.508) MIN .018 ± .003 .100 (2.54) BSC ) 8 N8 0502 NOTE: 1. DIMENSIONS ARE INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm) SW Package 16-Lead Plastic Small Outline (Wide .300 Inch) (Reference LTC DWG # 05-08-1620) .050 BSC .045 ±.005 .030 ±.005 TYP .398 – .413 (10.109 – 10.490) NOTE 4 16 N 15 14 13 12 11 10 9 N .325 ±.005 .420 MIN .394 – .419 (10.007 – 10.643) NOTE 3 1 2 3 N/2 N/2 RECOMMENDED SOLDER PAD LAYOUT 1 .005 (0.127) RAD MIN .009 – .013 (0.229 – 0.330) .291 – .299 (7.391 – 7.595) NOTE 4 .010 – .029 × 45° (0.254 – 0.737) 2 3 4 5 6 .093 – .104 (2.362 – 2.642) 7 8 .037 – .045 (0.940 – 1.143) 0° – 8° TYP .050 (1.270) BSC NOTE 3 .016 – .050 (0.406 – 1.270) NOTE: 1. DIMENSIONS IN .004 – .012 (0.102 – 0.305) .014 – .019 (0.356 – 0.482) TYP INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS. THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS 4. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) S16 (WIDE) 0502 1101fa 16 Linear Technology Corporation LW/TP 1002 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 1989