LTC2054/LTC2055 Single/Dual Micropower Zero-Drift Operational Amplifi ers FEATURES DESCRIPTION n Supply Current 150μA (Max per Amplifi er) The LTC®2054/LTC2055 are low power, low noise, single/ Guaranteed from –40°C to 85°C dual, zero-drift operational amplifi ers with an extended n Offset Voltage 3μV (Max, –40°C to 85°C) temperature version (LTC2054MP) that has guaranteed n Offset Voltage Drift 30nV/°C (Max, –40°C to 85°C) specifi cations from –55°C to 150°C. They are available n Guaranteed Specifi cations from –55°C to 150°C in TSOT-23 (ThinSOT™) and MS8 packages. For space (LTC2054MP) limited applications, the LTC2055 is also available in a n Common Mode Input Range from V– to V+ – 0.5V 3mm × 3mm × 0.8mm dual fi ne pitch leadless package n Output Swings Rail-to-Rail (DFN). They operate from a single 2.7V minimum supply n Voltage Gain: 140dB (Typ) and support ±5V applications. The current consumption n PSRR and CMRR: 130dB (Typ) is typically 150μA for the LTC2054 and 130μA/amp for n Input Bias Current: 1pA (Typ, 25°C) the LTC2055. n Noise: 1.6μV (0.01Hz to 10Hz Typ) P-P The LTC2054/LTC2055, despite their miniature size, feature n Supply Operation: uncompromising DC performance. The maximum input 2.7V to 6V (LTC2054/LTC2055) offset voltage and offset drift are 3.0μV and 30nV/°C over 2.7V to ±5.5V (LTC2054HV/LTC2055HV) the –40°C to 85°C industrial temperature range. The almost n Low Profi le (1mm) TSOT-23, MS8 and zero DC offset and drift are supported with a power supply 3mm × 3mm × 0.8mm DFN Packages rejection ratio (PSRR) and common mode rejection ratio APPLICATIONS (CMRR) of 130dB (typ). n Thermocouple Amplifi ers The input common mode voltage ranges from the negative n Electronic Scales supply up to typically 0.5V below the positive supply. The open-loop gain is typically 140dB. The LTC2054/LTC2055 n Medical Instrumentation also feature a 1.6μV DC to 10Hz noise and a 500kHz n Strain Gauge Amplifi ers P-P gain-bandwidth product. n High Resolution Data Acquisition n DC Accurate RC Active Filters L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other n Low Side Current Sense trademarks are the property of their respective owners. n Battery-Powered Systems TYPICAL APPLICATION –48V Low Side Precision Current Sense V vs Temperature OS 10 VS = ±5V Q1 10k 8 ZETEX 0.1μF 1% 6 ZVN3320F 5V 4 39k 110%0Ω –LTC2054 0.01μF –+LTC2054 VOUT = 100VSENSE V (μV)OS –220 + 0.1μF –4 100Ω BZX84C5V1 –6 VZ = 5.1 0.003Ω –8 1% 3W –10 –48V SUPPLY – + 20545 TA01–48V LOAD –55 –20 15 50 85 120 155 ISENSE,VSENSE TEMPERATURE (°C) 20545 TA01b 20545fc 1

LTC2054/LTC2055 ABSOLUTE MAXIMUM RATINGS (Note 1) Total Supply Voltage (V+ to V–) Specifi ed Temperature Range (Note 2) LTC2054/LTC2055 ...................................................7V LTC2054C/LTC2055C ...............................0°C to 70°C LTC2054HV/LTC2055HV........................................12V LTC2054I/LTC2055I ..............................–40°C to 85°C Input Voltage .......................(V+ + 0.3V) to (V – – 0.3V) LTC2054H/LTC2055H .........................–40°C to 125°C S Input Current ........................................................±10mA LTC2054MP .......................................–55°C to 150°C Output Short-Circuit Duration .........................Indefi nite Storage Temperature Range .................. –65°C to 150°C DD Package .......................................–65°C to 125°C Lead Temperature (Soldering, 10 sec) TSOT23 and MS8 Packages ............................. 300°C PIN CONFIGURATION TOP VIEW TOP VIEW OUT A 1 8 V+ TOP VIEW OUT 1 5 V+ –IN A 2 7 OUT B OUT A 1 8V+ V– 2 +IN A 3 6 –IN B –IN A 2 7OUT B V– 4 5 +IN B +IN A 3 6–IN B +IN 3 4 –IN V– 4 5+IN B MS8 PACKAGE S5 PACKAGE DD PACKAGE 8-LEAD PLASTIC MSOP 5-LEAD PLASTIC TSOT-23 8-LEAD (3mm × 3mm) PLASTIC DFN TJMAX = 150°C, θJA = 250°C/W UNDERSCIODNEN MECETTAEDL ITNOT EVR–NALLY TJMAX = 150°C, θJA = 200°C/W (PCB CONNECTION OPTIONAL) TJMAX = 125°C, θJA = 160°C/W (NOTE 5) ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LTC2054CS5#PBF LTC2054CS5#TRPBF LTAGB 5-Lead Plastic TSOT-23 0°C to 70°C LTC2054HVCS5#PBF LTC2054HVCS5#TRPBF LTAGD 5-Lead Plastic TSOT-23 0°C to 70°C LTC2054IS5#PBF LTC2054IS5#TRPBF LTAGB 5-Lead Plastic TSOT-23 –40°C to 85°C LTC2054HVIS5#PBF LTC2054HVIS5#TRPBF LTAGD 5-Lead Plastic TSOT-23 –40°C to 85°C LTC2054HS5#PBF LTC2054HS5#TRPBF LTAGB 5-Lead Plastic TSOT-23 –40°C to 125°C LTC2054HVHS5#PBF LTC2054HVHS5#TRPBF LTAGD 5-Lead Plastic TSOT-23 –40°C to 125°C LTC2055CDD#PBF LTC2055CDD#TRPBF LBCW 8-Lead (3mm × 3mm) Plastic DFN 0°C to 70°C LTC2055HVCDD#PBF LTC2055HVCDD#TRPBF LBCX 8-Lead (3mm × 3mm) Plastic DFN 0°C to 70°C LTC2055IDD#PBF LTC2055IDD#TRPBF LBCW 8-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C LTC2055HVIDD#PBF LTC2055HVIDD#TRPBF LBCX 8-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C LTC2055HDD#PBF LTC2055HDD#TRPBF LBCW 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LTC2055HVHDD#PBF LTC2055HVHDD#TRPBF LBCX 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LTC2055CMS8#PBF LTC2054CMS8#TRPBF LTBCR 8-Lead Plastic MSOP 0°C to 70°C LTC2055HVCMS8#PBF LTC2055HVCMS8#TRPBF LTBCT 8-Lead Plastic MSOP 0°C to 70°C LTC2055IMS8#PBF LTC2055IMS8#TRPBF LTBCR 8-Lead Plastic MSOP –40°C to 85°C 20545fc 2

LTC2054/LTC2055 ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LTC2055HVIMS8#PBF LTC2055HVIMS8#TRPBF LTBCT 8-Lead Plastic MSOP –40°C to 85°C LTC2055HMS8#PBF LTC2055HMS8#TRPBF LTBCR 8-Lead Plastic MSOP –40°C to 125°C LTC2055HVHMS8#PBF LTC2055HVHMS8#TRPBF LTBCT 8-Lead Plastic MSOP –40°C to 125°C LTC2054MPS5#PBF LTC2054MPS5#TRPBF LTFFF 5-Lead Plastic TSOT-23 –55°C to 150°C LTC2054HVMPS5#PBF LTC2054HVMPS5#TRPBF LTFFG 5-Lead Plastic TSOT-23 –55°C to 150°C Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/ ELECTRICAL CHARACTERISTICS (LTC2054/LTC2055) The l denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at T = 25°C. V = 3V, 5V unless otherwise noted. (Note 2) A S LTC2054C/LTC2055C LTC2054I/LTC2055I LTC2054H/LTC2055H SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS I Supply Current (LTC2054) No Load ● 140 175 140 180 μA S I Supply Current Per Amplifi er No Load ● 130 150 130 155 μA S (LTC2055) V Input Offset Voltage (Note 3) ±0.5 ±3 ±0.5 ±3 μV OS ΔVOS/ΔT Average Input Offset Drift (Note 3) ● 0.02 ±0.03 0.02 ±0.05 μV/°C Long-Term Offset Drift 50 50 nV/√mo I Input Bias Current (Note 4) ±1 ±1 pA B ● ±150 ±3000 pA I Input Offset Current (Note 4) ±2 ±2 pA OS ● ±300 ±700 pA e Input Noise Voltage R = 100Ω, DC to 1Hz 0.6 0.6 μV n S P-P R = 100Ω, DC to 10Hz 1.6 1.6 μV S P-P CMRR Common Mode Rejection Ratio V = GND to V+ – 0.7V 115 130 115 130 dB CM V = 3V ● 110 110 dB S V = GND to V+ – 0.7V 120 130 120 130 dB CM V = 5V ● 115 115 dB S PSRR Power Supply Rejection Ratio V = 2.7V to 6V 120 130 120 130 dB S ● 115 115 dB A Large-Signal Voltage Gain R = 100k, V = 3V, V = V /2 120 135 120 135 dB VOL L S OUT S ● 115 115 dB R = 100k, V = 5V, V = V /2 125 140 125 140 dB L S OUT S ● 120 120 dB V Output Voltage Swing High R = 5k to GND, V = 3V 2.87 2.89 2.87 2.89 V OUT L S R = 5k to GND, V = 3V ● 2.85 2.84 V L S R = 5k to GND, V = 5V 4.80 4.83 4.80 4.83 V L S R = 5k to GND, V = 5V ● 4.75 4.70 V L S R = 100k to GND, V = 3V 2.98 2.99 2.98 2.99 V L S R = 100k to GND, V = 3V ● 2.975 2.97 V L S R = 100k to GND, V = 5V 4.985 4.99 4.985 4.99 V L S R = 100k to GND, V = 5V ● 4.980 4.970 V L S 20545fc 3

LTC2054/LTC2055 ELECTRICAL CHARACTERISTICS (LTC2054/LTC2055) The l denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at T = 25°C. V = 3V, 5V unless otherwise noted. (Note 2) A S LTC2054C/LTC2055C LTC2054I/LTC2055I LTC2054H/LTC2055H SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS V Output Voltage Swing Low R = 5k to GND, V = 3V 2 8 3 8 mV OUT L S R = 5k to GND, V = 3V ● 10 10 mV L S R = 5k to GND, V = 5V 2 8 3 8 mV L S R = 5k to GND, V = 5V ● 10 10 mV L S R = 100k to GND, V = 3V 2 8 3 8 mV L S R = 100k to GND, V = 3V ● 10 10 mV L S R = 100k to GND, V = 5V 2 8 3 8 mV L S R = 100k to GND, V = 5V ● 10 10 mV L S SR Slew Rate 0.5 0.5 V/μs GBW Gain Bandwidth Product 500 500 kHz f Internal Sampling Frequency 1 1 kHz S (LTC2054HV/LTC2055HV) The ● denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at T = 25°C. V = ±5V unless otherwise noted. (Note 2) A S LTC2054HVC/LTC2055HVC LTC2054HVI/LTC2055HVI LTC2054HVH/LTC2055HVH SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS I Supply Current No Load (LTC2054) ● 175 210 175 215 μA S I Supply Current (Per Amplifi er) No Load (LTC2055) ● 150 180 150 185 μA S V Input Offset Voltage (Note 3) ±0.5 ±5 ±0.5 ±5 μV OS ΔVOS/ΔT Average Input Offset Drift (Note 3) ● 0.025 ±0.03 0.025 ±0.05 μV/°C Long-Term Offset Drift 50 50 nV/√mo I Input Bias Current (Note 4) ±3 ±3 pA B ● ±150 ±3000 pA I Input Offset Current (Note 4) ±6 ±6 pA OS ● ±300 ±700 pA e Input Noise Voltage R = 100Ω, DC to 1Hz 0.6 0.6 μV n S P-P R = 100Ω, DC to 10Hz 1.6 1.6 μV S P-P CMRR Common Mode Rejection Ratio V = GND to V+ – 0.9 120 130 120 130 dB CM ● 115 115 dB PSRR Power Supply Rejection Ratio V = 2.7V to 11V 120 130 120 130 dB S ● 115 115 dB AVOL Large-Signal Voltage Gain R = 100k, V = GND 125 140 125 140 dB L OUT ● 120 120 dB V Maximum Output Voltage Swing R = 5k to GND ±4.78 ±4.82 ±4.78 ±4.82 V OUT L R = 5k to GND ● ±4.75 ±4.70 V L R = 100k to GND ±4.98 ±4.99 ±4.98 ±4.99 V L R = 100k to GND ● ±4.975 ±4.97 V L SR Slew Rate 0.5 0.5 V/μs GBW Gain Bandwidth Product 500 500 kHz f Internal Sampling Frequency 1 1 kHz S 20545fc 4

LTC2054/LTC2055 ELECTRICAL CHARACTERISTICS (LTC2054MP) The l denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at T = 25°C. V = 3V, 5V unless otherwise noted. (Note 2) A S SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS I Supply Current No Load ● 145 190 μA S V Input Offset Voltage (Note 3) ● ±10 μV OS (Note 3) –55°C to 135°C ±8 μV ΔVOS/ΔT Average Input Offset Drift (Note 3) ● 0.04 ±0.1 μV/°C Long-Term Offset Drift 50 nV/√mo I Input Bias Current (Note 4) ±1 pA B ● ±12 nA I Input Offset Current (Note 4) ±2 pA OS ● ±5 nA e Input Noise Voltage R = 100Ω, DC to 1Hz 0.6 μV n S P-P R = 100Ω, DC to 10Hz 1.6 μV S P-P CMRR Common Mode Rejection Ratio V = GND to V+ – 0.7V 115 130 dB CM V = 3V ● 105 dB S V = GND to V+ – 0.7V 120 130 dB CM V = 5V ● 110 dB S PSRR Power Supply Rejection Ratio V = 2.7V to 6V 120 130 dB S ● 110 dB A Large-Signal Voltage Gain R = 100k, V = 3V, V = V /2 120 135 dB VOL L S OUT S ● 110 dB R = 100k, V = 5V, V = V /2 125 140 dB L S OUT S ● 115 dB V Output Voltage Swing High R = 5k to GND, V = 3V 2.87 2.89 V OUT L S R = 5k to GND, V = 3V ● 2.84 V L S R = 5k to GND, V = 5V 4.80 4.83 V L S R = 5k to GND, V = 5V ● 4.70 V L S R = 100k to GND, V = 3V 2.98 2.99 V L S R = 100k to GND, V = 3V ● 2.97 V L S R = 100k to GND, V = 5V 4.985 4.99 V L S R = 100k to GND, V = 5V ● 4.970 V L S V Output Voltage Swing Low R = 5k to GND, V = 3V 3 8 mV OUT L S R = 5k to GND, V = 3V ● 10 mV L S R = 5k to GND, V = 5V 3 8 mV L S R = 5k to GND, V = 5V ● 10 mV L S R = 100k to GND, V = 3V 3 8 mV L S R = 100k to GND, V = 3V ● 10 mV L S R = 100k to GND, V = 5V 3 8 mV L S R = 100k to GND, V = 5V ● 10 mV L S SR Slew Rate 0.5 V/μs GBW Gain Bandwidth Product 500 kHz f Internal Sampling Frequency 1 kHz S 20545fc 5

LTC2054/LTC2055 ELECTRICAL CHARACTERISTICS (LTC2054HVMP) The ● denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at T = 25°C. V = ±5V unless otherwise noted. (Note 2) A S SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS I Supply Current No Load ● 175 220 μA S V Input Offset Voltage (Note 3) ● ±10 μV OS ΔVOS/ΔT Average Input Offset Drift (Note 3) ● 0.05 ±0.1 μV/°C Long-Term Offset Drift 50 nV/√mo I Input Bias Current (Note 4) ±3 pA B ● ±12 nA I Input Offset Current (Note 4) ±6 pA OS ● ±5 nA e Input Noise Voltage R = 100Ω, DC to 1Hz 0.6 μV n S P-P R = 100Ω, DC to 10Hz 1.6 μV S P-P CMRR Common Mode Rejection Ratio V = GND to V+ – 0.9 120 130 dB CM ● 110 dB PSRR Power Supply Rejection Ratio V = 2.7V to 11V 120 130 dB S ● 110 dB AVOL Large-Signal Voltage Gain R = 100k, V = GND 125 140 dB L OUT ● 115 dB V Maximum Output Voltage Swing R = 5k to GND ±4.78 ±4.82 V OUT L R = 5k to GND ● ±4.675 V L R = 100k to GND ±4.98 ±4.99 V L R = 100k to GND ● ±4.965 V L SR Slew Rate 0.5 V/μs GBW Gain Bandwidth Product 500 kHz f Internal Sampling Frequency 1 kHz S Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 3: These parameters are guaranteed by design. Thermocouple effects may cause permanent damage to the device. Exposure to any Absolute preclude measurements of these voltage levels during automated testing. Maximum Rating condition for extended periods may affect device Note 4: Limit is determined by high speed automated test capability. See reliability and lifetime. Typical Characteristic curves for actual typical performance. For tighter Note 2: The LTC2054/LTC2055 are designed, characterized and expected to specifi cations, please consult Linear Technology Marketing. meet the extended temperature limits of –40°C and 125°C. The LTC2054C/ Note 5: The θJA specifi ed for the DD package is with minimal PCB heat LTC2055C/LTC2054HVC/LTC2055HVC are guaranteed to meet the spreading metal. Using expanded metal area on all layers of a board temperature limits of 0°C and 70°C. The LTC2054I/LTC2055I/LTC2054HVI/ reduces this value. LTC2055HVI are guaranteed to meet temperature limits of –40°C and 85°C. The LTC2054H/LTC2055H and LTC2054HVH/LTC2055HVH are guaranteed to meet the temperature limits of –40°C and 125°C. The LTC2054MP/LTC2054HVMP are guaranteed to meet the temperature limits of –55°C and 150°C. 20545fc 6

LTC2054/LTC2055 TYPICAL PERFORMANCE CHARACTERISTICS Common Mode Rejection Ratio DC CMRR vs Frequency vs Common Mode Input Range PSRR vs Frequency 140 140 140 VS = 3V OR 5V VS = ±2.5V 120 VCM = 0.5VP-P 120 120 100 100 100 80 MRR (dB) 8600 MRR (dB) 8600 VS = 3V VS = 5V SRR (dB) 6400 –PSRR C C P 20 40 40 +PSRR 0 20 20 –20 TA = 25°C 0 0 –40 1 10 100 1k 10k 100k 0 1 2 3 4 5 10 100 1k 10k 100k 1M FREQUENCY (Hz) VCM (V) FREQUENCY (Hz) 20545 G01 20545 G02 20545 G03 Output Voltage Swing Output Swing Short-Circuit Output Current vs Load Resistance vs Load Current vs Supply Voltage 5 VS= ±5V VS = ±2.5V V+ mA) 6 OUTPUT SWING (V) ––––432101234 VVVVSSSS==== ±±±±2211....5555VVVV OUTPUT SWING (V)VVV––– +++ 110...505 VS = ±1.5VVS = ±2.5V VS = ±1.5VVVSS = = ± ±55VV VVV+++––– 011...505 RT-CIRCUIT OUTPUT CURRENT, I (OUT ––––6844202 VVIOOSIUUOSTTUI N R==KC VVE–+ –5 RL TO GND VS= ±5V V– SHO–10 0 2 4 6 0 1 2 3 4 5 3 4 5 6 7 8 9 10 11 LOAD RESISTANCE (kΩ) SOURCING OR SINKING LOAD CURRENT (mA) TOTAL SUPPLY VOLTAGE, V+ TO V– (V) 20545 G04 20545 G05 20545 G06 Gain/Phase vs Frequency Input Bias Current vs Temperature 120 –60 100000 VS = ±2.5V VS = ±5V 100 PHASE VIN = 0.5VP-P –80 RL = 10kΩ 10000 80 –100 A) p dB)60 GAIN –120PHA ENT ( 1000 N (40 –140SE RR GAI20 –160 (DEG) BIAS CU 100 0 –180 10 CL = 30pF –20 CL = 50pF –200 CL = 100pF –40 –220 1 10 100 1k 10k 100k 1M 10M –55 –20 15 50 85 120 155 FREQUENCY (Hz) TEMPERATURE (°C) 20545 G07 20545 G08 20545fc 7

LTC2054/LTC2055 TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current V vs Temperature vs Input Common Mode Voltage Transient Response OS 8 10000 VS = ±5V VSUPPLY = ±2.5V 7 6 1000 TA = 155°C 1 5 A) TA = 125°C p V (μV)OS 432 S CURRENT ( 10100 TA = 85°C OUTPUT (V) 0 A 1 BI TA = 70°C –1 0 1 –1 TA = –55°C TA = 25°C –2 0.1 TA = –40°C –55 –20 15 50 85 120 155 –2.5 –2 –1.5 –1 –0.5 0 0.5 1 1.5 2 AV= 1 10μs/DIV TEMPERATURE (°C) COMMON MODE VOLTAGE (V) RL= 100k CL= 50pF 20545 G09 20545 G10 VS= ±2.5V 20545 G11 VIN= 10kHz 2VP-P Output Overload Recovery Output Overload Recovery Common Mode Input Range 11 V– = 0V 2.5 UT (V)0.2 V) 109 PUT (V) INP 0 LTAGE ( 87 T O OU 0 0 DE V 6 V) MO 5 UT ( ON 4 P M UT (V) 0 OUT–2.5 COM 23 INP–0.2 1 0 AV= –100 2ms/DIV AV= –100 2ms/DIV 0 1 2 3 4 5 6 7 8 9 10 11 RL= 100k RL= 100k TOTAL SUPPLY VOLTAGE (V) VS= ±2.5V VS= ±2.5V 20545 G12 20545 G13 20545 G14 Supply Current vs Supply Voltage Supply Current vs Temperature Noise Spectrum 250 250 √Hz)100 V/ 225 225 Y (n 90 SUPPLY CURRENT (μA) 21111075207050505 SUPPLY CURRENT (μA) 21111075207050505 VS = ±V2VS.S5 =V= ±±51V.5V ED VOLTAGE NOISE DENSIT 457863000000 50 50 ER 20 F F 25 25 RE 10 AV = 100 0 0 PUT 0 VS = ±2.5V 0 1 2 3 4 5 6 7 8 9 10 –55 –20 15 50 85 120 155 N 10 100 1k 10k I TOTAL SUPPLY VOLTAGE (V) TEMPERATURE (°C) FREQUENCY (Hz) 20545 G15 20545 G16 20545 G17 20545fc 8

LTC2054/LTC2055 TEST CIRCUITS Electrical Characteristics Test Circuit 100k OUTPUT V+ 10Ω – LTC2054/55 + RL V– 20545 TC01 DC-10Hz Noise Test Circuit 100k 475k 10Ω – 0.01μF 158k 316k 475k LTC2054/55 – + 0.1μF 0.01μF LT1012 TO X-Y RECORDER + FOR 1Hz NOISE BW INCREASE ALL THE CAPACITORS BY A FACTOR OF 10. 20545 TC02 20545fc 9

LTC2054/LTC2055 APPLICATIONS INFORMATION Clock Feedthrough, Input Bias Current The second form of clock feedthrough is caused by the small amount of charge injection occurring during the sampling The LTC2054 and LTC2055 use auto-zeroing circuitry and holding of the op amp’s input offset voltage. The current to achieve an almost zero DC offset over temperature, spikes are multiplied by the impedance seen at the input common mode voltage, and power supply voltage. The terminals of the op amp, and the resulting voltage spikes frequency of the clock used for auto-zeroing is typically appear at the output multiplied by the closed loop gain 1.0kHz. The term “clock feedthrough” is broadly used to of the op amp. To reduce this form of clock feedthrough, indicate visibility of this clock frequency in the op amp use smaller valued gain setting resistors and minimize the output spectrum. There are typically two types of clock source resistance at the input. If the resistance seen at the feedthrough in auto-zeroed op amps like the LTC2054/ inputs is less than 10kΩ, this form of clock feedthrough LTC2055. is less than the amount of residue clock feedthrough from The fi rst form of clock feedthrough is caused by the settling the fi rst form described above. of the internal sampling capacitor and is input referred; Placing a capacitor across the feedback resistor reduces that is, it is multiplied by the closed loop gain of the op either form of clock feedthrough by limiting the bandwidth amp. This form of clock feedthrough is independent of the of the closed loop gain. magnitude of the input source resistance or the magnitude of the gain setting resistors. The LTC2054/LTC2055 have Input bias current is defi ned as the DC current into the an input referred residue clock feedthrough of less then input pins of the op amp. The same current spikes that 0.2μV at 1.0kHz. RMS DC to 1Hz Noise 0.4μV 20545 F01 10 SEC DC to 10Hz Noise 1μV 20545 F02 1 SEC 20545fc 10

LTC2054/LTC2055 APPLICATIONS INFORMATION cause the second form of clock feedthrough described Voltage Follower with Input Exceeding above, when averaged, dominate the DC input bias current the Common Mode Range of the op amp below 70°C. 2.5V At temperatures above 70°C, the leakage of the ESD protec- – tion diodes on the inputs increases the input bias currents LTC2054/55 OUTPUT of both inputs in the positive direction, while the current 1k + caused by the charge injection stays relatively constant. ±3.75VP 100k SINE WAVE –2.5V At elevated temperatures (above 70°C) the leakage current begins to dominate and both the negative and positive 20545 F03 pins’ input bias currents are in the positive direction (into the pins). Extended Common Mode Range Extended Common Mode Range 2V V) The LTC2054/LTC2055 input stage is designed to allow UT ( 0V P nearly rail-to-rail input common mode signals. In addition, IN–2V signals that extend beyond the allowed input common mode range do not cause output phase inversion. V) 2V T ( U 0V P T U O–2V AV= 1 500μs/DIV RL= 100k VS= ±2.5V VIN= 500Hz 7.5VP-P 20545 F04 TYPICAL APPLICATIONS Simple Differential Bridge Amplifi er 5V 5V 0.1μF 1μF LT1790-2.5 499k 10kΩ 4 – 5 BRIDGE 1 LTC2054HV AV = 100 3 + 2 0.1μF 499k –5V 20545 TA02 20545fc 11

LTC2054/LTC2055 TYPICAL APPLICATIONS Ground Referred Precision Current Sources LT1634-1.25 V+ 0 ( V≤– I)O +U T1.≤5 V1 0≤0 VμAOUT≤ –1V VO–+UT 1.25V 10k 4 – 5 IOUT= —R—SE—T 1 LTC2054 3 + 5 RSET 3 + 2 1 LTC2054 RSET 10k 4 – 2 1.25V + IOUT= —R—SE—T V– VOUT – 0 ≤ IOUT≤ 100μA LT1634-1.25 0.2V ≤ VOUT≤ (V+) – 1.5V 20545 TA03 Instrumentation Amplifi er with 100V Common Mode Input Voltage 1k 1M V+ 1M 2 8 + – VIN LTC210/255HV 1 1k 6 – – 1M 3 + 4 5 LTC210/255HV 7 VOUT + 1k V– OUTPUT OFFSET ≤3mV FOR 0.1% RESISTORS, CMRR = 54dB 20545 TA04 Gain of 1001 Single Supply Instrumentation Amplifi er C1 R2 0.1μF 1k V+ R4 1M R1 1M 2 – 8 R3 1/2 1 1k 6 – LTC2055 3 1/2 7 –VIN + 4 LTC2055 VOUT 5 +VIN + OUTPUT DC OFFSET ≤ 6mV FOR 0.1% RESISTORS, CMRR = 54dB 20545 TA05 20545fc 12

LTC2054/LTC2055 PACKAGE DESCRIPTION DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1698 Rev C) 0.70(cid:112)0.05 3.5(cid:112)0.05 1.65(cid:112)0.05 2.10(cid:112)0.05 (2 SIDES) PACKAGE OUTLINE 0.25(cid:112) 0.05 0.50 BSC 2.38(cid:112)0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED R = 0.125 0.40(cid:112) 0.10 TYP 5 8 3.00(cid:112)0.10 1.65(cid:112) 0.10 (4 SIDES) (2 SIDES) PIN 1 TOP MARK (NOTE 6) (DD8) DFN 0509 REV C 4 1 0.200 REF 0.75(cid:112)0.05 0.25(cid:112) 0.05 0.50 BSC 2.38(cid:112)0.10 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD 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 20545fc 13

LTC2054/LTC2055 PACKAGE DESCRIPTION MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660 Rev F) 0.889± 0.127 (.035± .005) 5.23 3.20 – 3.45 (.206) (.126 – .136) MIN 3.00± 0.102 0.42± 0.038 0.65 (.118± .004) 0.52 (.0165± .0015) (.0256) (NOTE 3) 8 7 6 5 (.0205) TYP BSC REF RECOMMENDED SOLDER PAD LAYOUT 4.90± 0.152 3.00± 0.102 0.254 DETAIL “A” (.193± .006) (.118± .004) (NOTE 4) (.010) 0° – 6° TYP GAUGE PLANE 1 2 3 4 0.53± 0.152 (.021± .006) 1.10 0.86 (.043) (.034) DETAIL “A” MAX REF 0.18 (.007) SEATING PLANE 0.22 – 0.38 0.1016± 0.0508 (.009T Y– P.015) 0.65 MS(O.P0 (0M4S8)± 0 3.007 0RE2V )F (.0256) NOTE: BSC 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 20545fc 14

LTC2054/LTC2055 PACKAGE DESCRIPTION S5 Package 5-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1635) 0.62 0.95 2.90 BSC MAX REF (NOTE 4) 1.22 REF 1.50 – 1.75 3.85 MAX 2.62 REF 1.4 MIN 2.80 BSC (NOTE 4) PIN ONE RECOMMENDED SOLDER PAD LAYOUT 0.30 – 0.45 TYP 0.95 BSC PER IPC CALCULATOR 5 PLCS (NOTE 3) 0.80 – 0.90 0.20 BSC 0.01 – 0.10 1.00 MAX DATUM ‘A’ 0.30 – 0.50 REF 0.09 – 0.20 1.90 BSC NOTE: (NOTE 3) S5 TSOT-23 0302 REV B 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 20545fc Information furnished by Linear Technology Corporation is believed to be accurate and reliable. 15 However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

LTC2054/LTC2055 TYPICAL APPLICATIONS Low Power, Bidirectional 60V Precision Hi Side Current Sense POSITIVE SENSE 10mΩ – + 5 3 BAT54 VSENSE 1 PRECISION LTC1754-5 100Ω BIDIRECTIONAL 1N34.698V6Z 2 4 6 0.1μF 3 + 5 GAI1N OF 125 10μF 1μF 10μF 100Ω 4 –LTC2054 0.1μF 2 12.4k 33Ω 2 7 2N5401 1 VS– VS+ 8 OOFNF 05VV MPSA42 (PNOOWTEE:R P OSUSIPTPIVLYE BIDPIRREECCITSIIOONNAL LT1787HV 5 V+1O0U0T0 =* 2V.5SVEN SE CURRENT SENSE HIGH VOLTAGE 35.7k INCLUDES CIRCUIT LEVEL SHIFT 4.7μF SUPPLY CURRENT) AND GAIN OF 8 6 2.5V REF 4 20545 TA06 Precision Low Drift Integrator Ultra-Precision, Wide Dynamic Range 10Hz Bandwidth Photodiode Amplifi er OPEN t = tO 100k S1 1Ω 0.15μF 10μF GAIN = 0.1V/μA ~10pA RESOLUTION 5V 5V 50μA FULL SCALE 1k 4 – 5 VIN 1MΩ 4 – 5 1 2k 3 +LTC2054HV 1 (cid:176)ttO1V0INs(etc)dt PHOTODIAONDYE 3 +LTC20524 0.01μF 2 –5V 20545 TA08 –5V 20545 TA07 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LTC1049 Low Power Zero-Drift Op Amp Low Supply Current 200μA LTC1050 Precision Zero-Drift Op Amp Single Supply Operation 4.75V to 16V, Noise Tested and Guaranteed LTC1051/LTC1053 Precision Zero-Drift Op Amp Dual/Quad Version of the LTC1050 LTC1150 ±15V Zero-Drift Op Amp High Voltage Operation ±18V LTC1152 Rail-to-Rail Input and Output Zero-Drift Op Amp Single Zero-Drift Op Amp with Rail-to-Rail Input and Output and Shutdown LT1677 Low Noise Rail-to-Rail Input and Output V = 90μV, V = 2.7V to 44V OS S Precision Op Amp LT1884/LT1885 Rail-to-Rail Output Precision Op Amp V = 50μV, I = 400pA, V = 2.7V to 40V OS B S LTC2050 Zero-Drift Op Amp Enhanced Output Drive Capability LTC2051/LTC2052 Dual/Quad Zero-Drift Op Amp Dual/Quad Version of the LTC2050 in MS8/GN16 Package LTC2053 Zero-Drift Instrumentation Amp Rail-to-Rail Input 20545fc 16 Linear Technology Corporation LT 0809 REV C • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2004

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: A nalog Devices Inc.: LTC2055HMS8#PBF LTC2054HVHS5#TRM LTC2054HVMPS5#TRPBF LTC2055CDD#PBF LTC2055HVCMS8#TRPBF LTC2054HVHS5 LTC2055CMS8 LTC2054IS5#TR LTC2054HVCS5 LTC2055HVIDD#PBF LTC2055IMS8 LTC2054CS5#PBF LTC2054CS5#TRMPBF LTC2054IS5#TRPBF LTC2054HVIS5#TRMPBF LTC2055HVHDD#TRPBF LTC2055HVHDD#TR LTC2054HVCS5#TRMPBF LTC2054IS5#TRM LTC2054HVIS5 LTC2055HVIMS8 LTC2054HVCS5#TR LTC2054HVIS5#TR LTC2055HVCDD LTC2054HVCS5#PBF LTC2054CS5#TR LTC2055HVCDD#PBF LTC2055HVIDD#TR LTC2055HVIMS8#PBF LTC2055HVHDD LTC2054HVCS5#TRPBF LTC2055HDD#TR LTC2055CMS8#TRPBF LTC2055IDD#PBF LTC2054MPS5#PBF LTC2055HVCMS8 LTC2054HS5 LTC2054MPS5#TRMPBF LTC2055HVHMS8#TR LTC2054CS5#TRM LTC2054HVCS5#TRM LTC2054MPS5#TRPBF LTC2055HVHMS8 LTC2055HVCMS8#PBF LTC2054HVMPS5#PBF LTC2054HVIS5#TRPBF LTC2054HVIS5#TRM LTC2054HVIS5#PBF LTC2055IDD#TR LTC2054HS5#PBF LTC2054HVHS5#TRMPBF LTC2055HDD#TRPBF LTC2055HVCDD#TRPBF LTC2055HVIMS8#TRPBF LTC2055CDD#TR LTC2054HVHS5#PBF LTC2055IDD#TRPBF LTC2055HDD LTC2054IS5#TRMPBF LTC2054HVHS5#TR LTC2055HVHMS8#PBF LTC2055HVCDD#TR LTC2054HS5#TRMPBF LTC2055CDD LTC2055IDD LTC2054HVMPS5#TRMPBF LTC2055HVIDD LTC2055HDD#PBF LTC2055CDD#TRPBF LTC2055IMS8#TR LTC2055HVCMS8#TR LTC2054HVHS5#TRPBF LTC2055HMS8 LTC2055CMS8#TR LTC2055HVHDD#PBF LTC2054HS5#TRPBF LTC2055HVIDD#TRPBF LTC2054IS5#PBF LTC2054CS5 LTC2055IMS8#TRPBF LTC2055HMS8#TR LTC2054HS5#TR LTC2054HS5#TRM LTC2055CMS8#PBF LTC2054CS5#TRPBF LTC2055HVHMS8#TRPBF LTC2054IS5 LTC2055IMS8#PBF LTC2055HMS8#TRPBF