LT1102ACH

LT1102 High Speed, Precision, JFET Input Instrumentation Amplifier (Fixed Gain = 10 or 100) FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTIO Slew Rate: 30V/μs Gain-Bandwidth Product: 35MHz Settling Time (0.01%): 3μs Overdrive Recovery: 0.4μs Gain Error: 0.05% Max Gain Drift: 5ppm/°C Gain Nonlinearity: 16ppm Max Offset Voltage (Input + Output): 600μV Max – Drift with Temperature: 2μV/°C Input Bias Current: 40pA Max Input Offset Current: 40pA Max – Drift with Temperature (to 70°C): 0.5pA/°C The LT ®1102 is the first fast FET input instrumentation amplifier offered in the low cost, space saving 8-pin packages. Fixed gains of 10 and 100 are provided with excellent gain accuracy (0.01%) and non-linearity (3ppm). No external gain setting resistor is required. Slew rate, settling time, gain-bandwidth product, overdrive recovery time are all improved compared to competitive high speed instrumentation amplifiers. Industry best speed performance is combined with impressive precision specifications: less than 10pA input bias and offset currents, 180μV offset voltage. Unlike other FET input instrumentation amplifiers, on the LT1102 there is no output offset voltage contribution to total error, and input bias currents do not double with every 10°C rise in temperature. Indeed, at 70°C ambient temperature the input bias current is only 40pA. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. APPLICATIO S ■ ■ ■ ■ Fast Settling Analog Signal Processing Multiplexed Input Data Acquisition Systems High Source Impedance Signal Amplification from High Resistance Bridges, Capacitance Sensors, Photodetector Sensors Bridge Amplifier with < 1Hz Lowpass Filtering TYPICAL APPLICATIO Wideband Instrumentation Amplifier with ± 150mA Output Current V+ = 15V 6 5 R 7 LT1102 3 4 8 LT1010 OUT – 1 2 V – = – 15V OUTPUT = ± 10V INTO 75Ω TO 330kHz (R = 50Ω) ± 10V INTO 200Ω TO 330kHz (R = 200Ω) DRIVES 2.2nF CAP LOAD GAIN = 10, DEGRADED 0.01% DUE TO LT1010 LT1102 • TA01 5V/DIV + BIAS G = 10 U Slew Rate FPO 0.5μs/DIV FPOLT1102 • TA02 U U 1102fb 1 LT1102 ABSOLUTE AXI U RATI GS Supply Voltage ...................................................... ± 20V Differential Input Voltage ....................................... ± 40V Input Voltage ......................................................... ± 20V 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/ PACKAGE/ORDER I FOR ATIO TOP VIEW OUTPUT 8 ORDER PART NUMBER GROUND (REF) 1 REF 2 G = 10 OUT G = 10 90R 7 R + – 6 +IN 9R –IN 3 + – 9 = 1.8k 5 V+ V– 4 N8 PACKAGE 8-LEAD PDIP TJMAX = 100°C, θJA = 130°C/W 4 V – (CASE) H PACKAGE 8-LEAD TO-5 METAL CAN J8 PACKAGE 8-LEAD CERDIP OBSOLETE PACKAGE Consider the N8 Package for Alternate Source OBSOLETE PACKAGE Consider the N8 Package for Alternate Source Consult LTC Marketing for parts specified with wider operating temperature ranges. 2 + – + – 90R R 9R LT1102AMH LT1102MH LT1102ACH LT1102CH U U W WW U W (Note 1) Output Short-Circuit Duration .......................... Indefinite Operating Temperature Range LT1102I .............................................. –40°C to 85°C LT1102AC/LT1102C ................................ 0°C to 70°C LT1102AM/LT1102M (OBSOLETE).....–55°C to 125°C Storage Temperature Range ................. –65°C to 150°C Lead Temperature (Soldering, 10 sec).................. 300°C TOP VIEW GROUND (REF) 1 90R REF 2 G = 10 9R LT1102 8 OUTPUT 90R 7 R R 9R OUT G = 10 ORDER PART NUMBER LT1102IN8 LT1102ACN8 LT1102CN8 –IN 3 6 +IN 5 V+ LT1102MJ8 LT1102CJ8 LT1102 • POI01 1102fb LT1102 ELECTRICAL CHARACTERISTICS SYMBOL GE GNL PARAMETER Gain Error Gain Nonlinearity CONDITIONS VS = ± 15V, VCM = 0V, TA = 25°C, Gain = 10 or 100, unless otherwise noted. MIN LT1102AM/AC TYP MAX 0.010 3 8 7 180 3 ±3 0.050 14 20 16 600 40 ± 40 MIN LT1102M/I/C TYP MAX 0.012 4 8 7 200 4 ±4 1012 1011 1012 2.8 30 4 ± 10.5 82 86 5.0 ± 13.0 ± 12.0 100 1.7 10 18 37 20 2 ± 11.5 97 101 3.4 ± 13.5 ± 13.0 220 3.5 17 30 400 4.0 6.5 13 18 1.8 3.0 7 9 4.0 6.5 13 18 5.6 5 0.070 18 25 30 900 60 ± 60 UNITS % ppm ppm ppm μV pA pA Ω Ω Ω VO = ± 10V, RL = 50k or 2k G = 100, RL = 50k G = 100, RL = 2k G = 10, RL = 50k or 2k VOS IOS IB Input Offset Voltage Input Offset Current Input Bias Current Input Resistance Common Mode Differential Mode VCM = – 11V to 8V VCM = 8V to 11V 0.1Hz to 10Hz fO = 10Hz fO = 1000Hz (Note 2) fO = 1000Hz, 10Hz (Note 3) ± 10.5 1k Source Imbalance, VCM = ± 10.5V VS = ± 9V to ± 18V 84 88 1012 1011 1012 2.8 37 19 1.5 ± 11.5 98 102 3.3 en Input Noise Voltage Input Noise Voltage Density Input Noise Current Density lnput Voltage Range μVP-P nV/√Hz nV/√Hz fA/√Hz V dB dB mA V V kHz MHz V/μs V/μs ns μs μs μs μs CMRR PSRR IS VO BW SR Common Mode Rejection Ratio Power Supply Rejection Ratio Supply Current Maximum Output Voltage Swing Bandwidth Slew Rate Overdrive Recovery Settling Time RL = 50k RL = 2k G = 100 (Note 4) G = 10 (Note 4) G = 100, VIN = ± 0.13V, VO = ± 5V G = 10, VIN = ±1V, VO = ± 5V 50% Overdrive (Note 5) VO = 20V Step (Note 4) G = 10 to 0.05% G = 10 to 0.01% G = 100 to 0.05% G = 100 to 0.01% ± 13.0 ± 12.0 120 2.0 12 21 ± 13.5 ± 13.0 220 3.5 17 30 400 1.8 3.0 7 9 1102fb 3 LT1102 ELECTRICAL CHARACTERISTICS SYMBOL GE TCGE GNL PARAMETER Gain Error Gain Error Drift (Note 6) Gain Nonlinearity CONDITIONS G = 100, VO = ±10V, RL = 50k or 2k G = 10, VO = ±10V, RL = 50k or 2k G = 100, RL = 50k or 2k G = 10, RL = 50k or 2k G = 100, RL = 50k G = 100, RL = 2k G = 10, RL = 50k or 2k (Note 6) –40°C ≤ TA ≤ 85°C for I grades, unless otherwise noted. VS = ± 15V, VCM = 0V, Gain = 10 or 100, –55°C ≤ TA ≤ 125°C for AM/M grades, LT1102AM TYP MAX 0.10 0.05 9 5 20 28 9 300 2 0.3 ±2 0.25 0.12 20 10 70 85 20 1400 8 4 ±10 80 84 LT1102M/I TYP MAX 0.10 0.06 10 6 24 32 9 400 3 0.4 ± 2.5 96 99 2.5 ± 12.5 ± 12.0 ± 13.2 ± 12.6 0.30 0.15 25 14 90 110 24 2000 12 6 ±15 MIN MIN UNITS % % ppm/°C ppm/°C ppm ppm ppm μV μV/°C nA nA dB dB mA V V VOS ΔVOS/ΔT lOS IB CMRR PSRR IS VO Input Offset Voltage Input Offset Voltage Drift Input Offset Current Input Bias Current Common Mode Rejection Ratio Power Supply Rejection Ratio Supply Current Maximal Output Voltage Swing VCM = ±10.3V VS = ±10V to ±17V TA = 125°C RL = 50k RL = 2k ± 12.5 ± 12.0 82 88 97 100 2.5 ±13.2 ±12.6 VS = ± 15V, VCM = 0V, Gain = 10 or 100, 0°C ≤ TA ≤ 70°C, unless otherwise noted. SYMBOL GE TCGE GNL PARAMETER Gain Error Gain Error Drift (Note 6) Gain Nonlinearity CONDITIONS G = 100, VO = ±10V, RL = 50k or 2k G = 10, VO = ±10V, RL = 50k or 2k G = 100, RL = 50k or 2k G = 10, RL = 50k or 2k G = 100, RL= 50k G = 100, RL= 2k G = 10, RL= 50k or 2k (Note 6) (Note 6) (Note 6) VCM = ±10.3V VS = ±10V to ±17V TA = 70°C RL = 50k RL = 2k ±12.8 ±12.0 83 87 MIN LT1102AC TYP MAX 0.04 0.03 8 5 8 11 8 230 2 10 0.5 ± 40 1 98 101 2.8 ±13.4 ±12.8 ±12.8 ±12.0 0.11 0.09 18 10 30 36 18 1000 8 150 3 ± 300 4 81 85 MIN LT1102C TYP MAX 0.05 0.04 9 6 9 12 8 280 3 15 0.5 ± 50 1 97 100 2.9 ±13.4 ±12.8 0.14 0.12 22 14 40 48 22 1400 12 220 4 ± 400 6 UNITS % % ppm/°C ppm/°C ppm ppm ppm μV μV/°C pA pA/°C pA pA/°C dB dB mA V V VOS ΔVOS/ΔT IOS ΔIOS/ΔT IB ΔIB/ΔT CMRR PSRR IS VO Input Offset Voltage Input Offset Voltage Drift Input Offset Current Input Offset Current Drift Input Bias Current lnput Bias Current Drift Common Mode Rejection Ratio Power Supply Rejection Ratio Supply Current Maximum Output Voltage Swing 1102fb 4 LT1102 ELECTRICAL CHARACTERISTICS 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: This parameter is tested on a sample basis only. Note 3: Current noise is calculated from the formula: in = (2qIB)1/2 where q = 1.6 • 10–19 coulomb. The noise of source resistors up to 1GΩ swamps the contribution of current noise. Note 4: This parameter is not tested. It is guaranteed by design and by inference from the slew rate measurement. Note 5: Overdrive recovery is defined as the time delay from the removal of an input overdrive to the output’s return from saturation to linear operation. 50% overdrive equals VIN = ± 2V (G = 10) or VIN = ± 200mV (G = 100). Note 6: This parameter is not tested. It is guaranteed by design and by inference from other tests. TYPICAL PERFOR A CE CHARACTERISTICS Small Signal Response, G = 10 (Input = 50mV Pulse) Small Signal Response, G = 100 (Input = 5mV Pulse) Slew Rate, G = 100 (Input = ± 130mV Pulse) 100mV/DIV 100mV/DIV 2μS/DIV FPOLT1102 • TPC01 2μS/DIV FPOLT1102 • TPC02 5V/DIV Settling Time, G = 10 (Input From – 10V to 10V) 5mV/DIV AT SUM NODE 1μS/DIV FPOLT1102 • TPC04 5mV/DIV AT SUM NODE Settling Time, G = 100 (Input From – 10V to 10V) 5mV/DIV AT SUM NODE 5mV/DIV AT SUM NODE UW FPOLT1102 • TPC06 2μS/DIV FPOLT1102 • TPC03 Settling Time, G = 10 (Input From 10V to –10V) 1μS/DIV FPOLT1102 • TPC05 Settling Time, G = 100 (Input From 10V to –10V) 2μS/DIV FPOLT1102 • TPC07 2μS/DIV 1102fb 5 LT1102 TYPICAL PERFOR A CE CHARACTERISTICS Capacitive Load Handling 120 100 OVERSHOOT (%) VS = ±15V TA = 25°C OUTPUT IMPEDANCE (Ω) G = 10 G = 100 GAIN ERROR (%) 80 60 40 20 0 0.1 1 10 100 CAPACITIVE LOAD (nF) Undistorted Output vs Frequency 30 RMS VOLTAGE NOISE DENSITY (nV√Hz) INPUT BIAS CURRENT, TA = 125°C (nA) PEAK-TO-PEAK OUTPUT SWING (V) VS = ± 15V TA = 25°C 20 G = 100 RL = 2k OR 50k 10 G = 10 RL = 2k G = 10 RL = 50k 0 10k 100k 1M FREQUENCY (Hz) Warm-Up Drift 50 CHANGE IN OFFSET VOLTAGE (μV) VS = ±15V TA = 25°C COMMON MODE RANGE (V) 40 12 11 10 –11 –12 –13 –14 SUPPLY CURRENT (mA) 30 N PACKAGE 20 H AND J PACKAGE 10 0 0 1 3 4 2 TIME AFTER POWER ON (MINUTES) LT1102 • TPC14 6 UW LT1102 • TPC08 LT1102 • TPC11 Output Impedance vs Frequency 100 VS = ±15V TA = 25°C 0.5 Gain vs Frequency 0 –0.5 G = 100 VS = ± 15V TA = 25°C 40 G = 100 10 G = 10 –1.0 –1.5 0 G = 10 –0.5 –1.0 30 GAIN (dB) 1 20 10 100k 1M FREQUENCY (Hz) 10M LT1102 • TPC10 0.1 1000 1k 10k 100k FREQUENCY (Hz) 1M LT1102 • TPC09 –1.5 10k Voltage Noise vs Frequency 100 70 50 40 30 20 1/f CORNER = 28Hz VS = ±15V TA = 25°C 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 Input Bias Current Over the Common Mode Range VS = ± 15V 160 140 120 TA = 125°C 100 80 60 TA = 70°C TA = 25°C 40 20 0 –20 –5 –10 0 5 10 COMMON MODE VOLTAGE (V) 15 INPUT BIAS CURRENT, TA = 25°C TO 70°C (pA) 10 10M 3 10 30 100 300 1k 3k 10k 0.8 –15 FREQUENCY (Hz) LT1102 • TPC12 LT1102 • TPC13 Common Mode Range vs Temperature 15 14 13 Supply Current vs Temperature 6 VS = ±15V G = 10 G = 100 4 VS = ± 15V VS = ± 10V 2 G = 10 OR 100 5 –15 –50 50 0 TEMPERATURE (°C) 100 LT1102 • TPC15 0 –50 –25 50 25 75 0 TEMPERATURE (˚C) 100 125 LT1102 • TPC16 1102fb LT1102 TYPICAL PERFOR A CE CHARACTERISTICS Short-Circuit Current vs Time 50 40 SHORT-CIRCUIT CURRENT (mA) 30 20 10 0 –10 –20 – 30 –40 –50 VS = ± 15V TA = 125°C TA = 125°C TA = 25°C TA = – 55°C PERCENT OF UNITS 2 0 1 3 TIME FROM OUTPUT SHORT TO GROUND (MINUTES) LT1102 • TPC17 Gain Error vs Temperature 0.10 VS = ± 15V RL ≥ 2k G = 100 GAIN NONLINEARITY (ppm) 0.08 GAIN ERROR (%) 0.06 0.04 G = 10 0.02 0 –50 –25 50 25 0 75 TEMPERATURE (°C) UW Distribution of Offset Voltage 35 30 25 20 15 10 5 0 –0.8 –0.4 0.4 0.8 0 INPUT OFFSET VOLTAGE (mV) LT1102 • TPC18 TA = – 55°C TA = 25°C VS = ± 15V TA = 25°C 950 UNITS TESTED IN ALL PACKAGES Gain Nonlinearity Over Temperature 40 32 G = 100 RL = 50k G = 10 RL = 2k OR 50k G = 100 RL = 2k 24 16 8 100 125 –50 –25 50 25 0 75 TEMPERATURE (°C) 100 125 LT1102 • TPC19 LT1102 • TPC20 1102fb 7 LT1102 APPLICATIO S I FOR ATIO In the two op amp instrumentation amplifier configuration, the first amplifier is basically in unity gain, and the second amplifier provides all the voltage gain. In the LT1102, the second amplifier is decompensated for gain of 10 stability, therefore high slew rate and bandwidth are achieved. Common mode rejection versus frequency is also optimized in the G = 10 mode, because the bandwidths of the two op amps are similar. When G = 100, this statement is no longer true; however, by connecting an 18pF capacitor between pins 1 and 2, a common mode AC gain is created to cancel the inherent roll-off. From 200Hz to 30kHz, CMRR versus frequency is improved by an order of magnitude. Input Protection Instrumentation amplifiers are often used in harsh environments where overload conditions can occur. The LT1102 employs FET input transistors, consequently the differential input voltage can be ± 30V (with ± 15V supplies, ± 36V with ±18V supplies). Some competitive instrumentation amplifiers have NPN inputs which are protected by back-to-back diodes. When the differential input Voltage exceeds ± 13V on these competitive devices, input current increases to milliampere level; more than ± 10V differential voltage can cause permanent damage. When the LT1102 inputs are pulled below the negative supply or above the positive supply, the inputs will clamp a diode voltage below or above the supplies. No damage will occur if the input current is limited to 20mA. COMMON MODE REJECTION RATIO (dB) 8 U Common Mode Rejection Ratio vs Frequency 120 100 80 60 40 20 0 W UU G = 10 G = 100 18pF PIN 1 TO PIN 2 G = 100 VS = ±15V TA = 25°C 1 10 100 1k 10k FREQUENCY (Hz) 100k 1M LT1102 • AI01 Gains Between 10 and 100 Gains between 10 and 100 can be achieved by connecting two equal resistors (= RX) between pins 1 and 2 and pins 7 and 8. Gain = 10 + RX R + RX/90 The nominal value of R is 1.84kΩ. 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. 1102fb LT1102 APPLICATIO S I FOR ATIO Differential Output 6 Gain = 20, 110, or 200 Instrumentation Amplifiers Single Ended Output + LT1102 8 6 + IN 3 – 1 – 6 + LT1102 8 3 3 – 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) LT1102 • AI02 Multiplexed Input Data Acquisition 509 OR EQUIVALENT S1A 4 CHANNELS OF DIFFERENTIAL INPUT S4A S1B S4B DECODER AO A1 EN LT1102 • AI03 800kHz SIGNALS CAN BE MULTIPLEXED WITH LT1102 IN G = 10 Voltage Programmable Current Source is Simple and Precise VIN 0 ± 10V + LT1006 – 0.05μF 10k + LT1102 A = 100 – R 10Ω* IK IK = LOAD LT1102 • AI04 U + LT1102 3 8 OUT W UU – + OUT + IN 1 – – 6 + LT1102 8 – 1 DA + LT1102 OUTPUT DB – Dynamic Response of the Current Source A = 5V/DIV B = 5mA/DIV VIN R • 100 HORIZ. = 20μs/DIV FPOLT1102 • AI05 1102fb 9 LT1102 TYPICAL APPLICATIO S Basic Connections V+ 5 6 INPUT 3 NC Settling Time Test Circuit 15V 6 R1 5.1k HP5082-2810 100Ω + – 4 –15V LT1102 3 1 20VP-P FLAT-TOP INPUT R1 = 910Ω, G = 10 R1 = 10k, G = 100 LT1102 • TA04 10 U + LT1102 7 8 1 4 OUT – 2 NC V– REF GAIN = 100 V+ 5 6 INPUT 3 + LT1102 7 8 OUT – 2 1 4 V– REF GAIN = 10 LT1102 • TA03 Offset Nulling 15V 2k 6 8 200Ω 5 + – 4 5 LT1102 8 OUT 10k R2 3 1 1.8k 5.0k FET PROBE 2k – 15V R2 = 3.3Ω, G = 10 R2 = 30Ω, G = 100 NULL RANGE = ± 1mV GAIN DEGRADATION ≈ 0.018% LT1102 • TA05 1102fb LT1102 PACKAGE DESCRIPTIO .045 – .068 (1.143 – 1.650) FULL LEAD OPTION .300 BSC (7.62 BSC) .008 – .018 (0.203 – 0.457) NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS 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. U H Package 8-Lead TO-5 Metal Can (.230 Inch PCD) (Reference LTC DWG # 05-08-1321) .335 – .370 (8.509 – 9.398) DIA .305 – .335 (7.747 – 8.509) .040 (1.016) MAX .050 (1.270) MAX GAUGE PLANE .165 – .185 (4.191 – 4.699) REFERENCE PLANE .500 – .750 (12.700 – 19.050) SEATING PLANE .010 – .045* (0.254 – 1.143) .016 – .021** (0.406 – 0.533) .027 – .045 (0.686 – 1.143) 45°TYP .028 – .034 (0.711 – 0.864) PIN 1 .230 (5.842) 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) 0.230 PCD 0801 J8 Package 8-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) CORNER LEADS OPTION (4 PLCS) .405 (10.287) MAX 8 7 6 5 .005 (0.127) MIN .023 – .045 (0.584 – 1.143) HALF LEAD OPTION .025 (0.635) RAD TYP 1 2 3 .220 – .310 (5.588 – 7.874) 4 .200 (5.080) MAX .015 – .060 (0.381 – 1.524) 0° – 15° .045 – .065 (1.143 – 1.651) .014 – .026 (0.360 – 0.660) .100 (2.54) BSC .125 3.175 MIN J8 0801 OBSOLETE PACKAGES 1102fb 11 LT1102 PACKAGE DESCRIPTIO U N8 Package 8-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) .400* (10.160) MAX 8 7 6 5 .255 ± .015* (6.477 ± 0.381) 1 .300 – .325 (7.620 – 8.255) 2 3 4 .130 ± .005 (3.302 ± 0.127) .045 – .065 (1.143 – 1.651) .065 (1.651) TYP .120 (3.048) .020 MIN (0.508) MIN .018 ± .003 (0.457 ± 0.076) N8 1002 .008 – .015 (0.203 – 0.381) +.035 .325 –.015 8.255 +0.889 –0.381 ( ) .100 (2.54) BSC INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm) NOTE: 1. DIMENSIONS ARE 1102fb 12 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● LT 0507 REV B • PRINTED IN USA www.linear.com © LINEAR TECHNOLOGY CORPORATION 1991