LTC2050IS6-PBF

FEATURES n n n n n n n n n n n n n LTC2050/LTC2050HV Zero-Drift Operational Amplifiers in SOT-23 DESCRIPTION The LTC®2050 and LTC2050HV are zero-drift operational amplifiers available in the 5- or 6-lead SOT-23 and SO-8 packages. The LTC2050 operates from a single 2.7V to 6V supply. The LTC2050HV operates on supplies from 2.7V to ±5.5V. The current consumption is 800μA and the versions in the 6-lead SOT-23 and SO-8 packages offer power shutdown (active low). The LTC2050, despite its miniature size, features uncompromising DC performance. The typical input offset voltage and offset drift are 0.5μV and 10nV/°C. The almost zero DC offset and drift are supported with a power supply rejection ratio (PSRR) and common mode rejection ratio (CMRR) of more than 130dB. The input common mode voltage ranges from the negative supply up to typically 1V from the positive supply. The LTC2050 also has an enhanced output stage capable of driving loads as low as 2kΩ to both supply rails. The open-loop gain is typically 140dB. The LTC2050 also features a 1.5μVP-P DC to 10Hz noise and a 3MHz gain bandwidth product. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Maximum Offset Voltage of 3μV Maximum Offset Voltage Drift of 30nV/°C Noise: 1.5μVP-P (0.01Hz to 10Hz Typ) Voltage Gain: 140dB (Typ) PSRR: 130dB (Typ) CMRR: 130dB (Typ) Supply Current: 0.8mA (Typ) Supply Operation: 2.7V to 6V (LTC2050) 2.7V to ±5.5V (LTC2050HV) Extended Common Mode Input Range Output Swings Rail-to-Rail Input Overload Recovery Time: 2ms (Typ) Operating Temperature Range: –40°C to 125°C SOT-23 Package APPLICATIONS n n n n n n n Thermocouple Amplifiers Electronic Scales Medical Instrumentation Strain Gauge Amplifiers High Resolution Data Acquisition DC Accurate RC Active Filters Low Side Current Sense TYPICAL APPLICATION Differential Bridge Amplifier 5V 50Ω GAIN TRIM 5V 0.1μF 1 18.2k μV 4 350Ω STRAIN GAUGE 0 5 1 AV = 100 2 Input Referred Noise 0.1Hz to 10Hz 0.1μF – + LTC2050HV 3 2 –1 0.1μF 18.2k 2050 TA01 –2 0 –5V 2050fb 2 4 6 TIME (SEC) 8 10 1 LTC2050/LTC2050HV ABSOLUTE MAXIMUM RATINGS (Note 1) Total Supply Voltage (V+ to V–) LTC2050..................................................................7V LTC2050HV ...........................................................12V Input Voltage ......................... (V+ + 0.3V) to (V– – 0.3V) Output Short-Circuit Duration ......................... Indefinite Operating Temperature Range................ –40°C to 125°C Specified Temperature Range (Note 3) ............................................. –40°C to 125°C Storage Temperature Range................... –65°C to 150°C Lead Temperature (Soldering, 10 sec) .................. 300°C PIN CONFIGURATION TOP VIEW TOP VIEW OUT 1 V– 2 +IN 3 4 –IN 5 V+ OUT 1 V– 2 +IN 3 TOP VIEW 6 V+ 5 SHDN 4 –IN SHDN 1 –IN 2 +IN 3 V– 4 8 7 6 5 NC V+ OUT NC S5 PACKAGE 5-LEAD PLASTIC TSOT-23 TJMAX = 125°C, θJA = 250°C/W S6 PACKAGE 6-LEAD PLASTIC TSOT-23 TJMAX = 125°C, θJA = 230°C/W S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 125°C, θJA = 190°C/W ORDER INFORMATION LEAD FREE FINISH LTC2050CS5#PBF LTC2050IS5#PBF LTC2050HS5#PBF LTC2050HVCS5#PBF LTC2050HVIS5#PBF LTC2050HVHS5#PBF LTC2050CS6#PBF LTC2050IS6#PBF LTC2050HS6#PBF LTC2050HVCS6#PBF LTC2050HVIS6#PBF LTC2050HVHS6#PBF LTC2050CS8#PBF LTC2050IS8#PBF LTC2050HVCS8#PBF LTC2050HVIS8#PBF TAPE AND REEL LTC2050CS5#TRPBF LTC2050IS5#TRPBF LTC2050HS5#TRPBF LTC2050HVCS5#TRPBF LTC2050HVIS5#TRPBF LTC2050HVHS5#TRPBF LTC2050CS6#TRPBF LTC2050IS6#TRPBF LTC2050HS6#TRPBF LTC2050HVCS6#TRPBF LTC2050HVIS6#TRPBF LTC2050HVHS6#TRPBF LTC2050CS8#TRPBF LTC2050IS8#TRPBF LTC2050HVCS8#TRPBF LTC2050HVIS8#TRPBF PART MARKING* LTAEG LTAEG LTAEG LTAEH LTAEH LTAEH LTAEJ LTAEJ LTAEJ LTAEK LTAEK LTAEK 2050 2050I 2050HV 050HVI PACKAGE DESCRIPTION 5-Lead Plastic TSOT-23 5-Lead Plastic TSOT-23 5-Lead Plastic TSOT-23 5-Lead Plastic TSOT-23 5-Lead Plastic TSOT-23 5-Lead Plastic TSOT-23 6-Lead Plastic TSOT-23 6-Lead Plastic TSOT-23 6-Lead Plastic TSOT-23 6-Lead Plastic TSOT-23 6-Lead Plastic TSOT-23 6-Lead Plastic TSOT-23 8-Lead Plastic SO 8-Lead Plastic SO 8-Lead Plastic SO 8-Lead Plastic SO SPECIFIED TEMPERATURE RANGE 0°C to 70°C –40°C to 85°C –40°C to 125°C 0°C to 70°C –40°C to 85°C –40°C to 125°C 0°C to 70°C –40°C to 85°C –40°C to 125°C 0°C to 70°C –40°C to 85°C –40°C to 125°C 0°C to 70°C –40°C to 85°C 0°C to 70°C –40°C to 85°C 2050fb 2 LTC2050/LTC2050HV ORDER INFORMATION LEAD BASED FINISH LTC2050CS5 LTC2050IS5 LTC2050HS5 LTC2050HVCS5 LTC2050HVIS5 LTC2050HVHS5 LTC2050CS6 LTC2050IS6 LTC2050HS6 LTC2050HVCS6 LTC2050HVIS6 LTC2050HVHS6 LTC2050CS8 LTC2050IS8 LTC2050HVCS8 LTC2050HVIS8 TAPE AND REEL LTC2050CS5#TR LTC2050IS5#TR LTC2050HS5#TR LTC2050HVCS5#TR LTC2050HVIS5#TR LTC2050HVHS5#TR LTC2050CS6#TR LTC2050IS6#TR LTC2050HS6#TR LTC2050HVCS6#TR LTC2050HVIS6#TR LTC2050HVHS6#TR LTC2050CS8#TR LTC2050IS8#TR LTC2050HVCS8#TR LTC2050HVIS8#TR PART MARKING* LTAEG LTAEG LTAEG LTAEH LTAEH LTAEH LTAEJ LTAEJ LTAEJ LTAEK LTAEK LTAEK 2050 2050I 2050HV 050HVI PACKAGE DESCRIPTION 5-Lead Plastic TSOT-23 5-Lead Plastic TSOT-23 5-Lead Plastic TSOT-23 5-Lead Plastic TSOT-23 5-Lead Plastic TSOT-23 5-Lead Plastic TSOT-23 6-Lead Plastic TSOT-23 6-Lead Plastic TSOT-23 6-Lead Plastic TSOT-23 6-Lead Plastic TSOT-23 6-Lead Plastic TSOT-23 6-Lead Plastic TSOT-23 8-Lead Plastic SO 8-Lead Plastic SO 8-Lead Plastic SO 8-Lead Plastic SO SPECIFIED TEMPERATURE RANGE 0°C to 70°C –40°C to 85°C –40°C to 125°C 0°C to 70°C –40°C to 85°C –40°C to 125°C 0°C to 70°C –40°C to 85°C –40°C to 125°C 0°C to 70°C –40°C to 85°C –40°C to 125°C 0°C to 70°C –40°C to 85°C 0°C to 70°C –40°C to 85°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ 2050fb 3 LTC2050/LTC2050HV ELECTRICAL CHARACTERISTICS PARAMETER Input Offset Voltage Average Input Offset Drift Long-Term Offset Drift Input Bias Current LTC2050 LTC2050HV Input Offset Current LTC2050 LTC2050HV Input Noise Voltage Input Capacitance Common Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Output Voltage Swing High Output Voltage Swing Low Slew Rate Gain Bandwidth Product Supply Current Shutdown Pin Input Low Voltage (VIL) Shutdown Pin Input High Voltage (VIH) Shutdown Pin Input Current Internal Sampling Frequency VSHDN = GND VSHDN = VIH, No Load VSHDN = VIL l l l l l l l l l (LTC2050, LTC2050HV) The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 3V unless otherwise noted. (Note 3) C, I SUFFIXES CONDITIONS (Note 2) (Note 2) l H SUFFIX MAX ±3 ±0.03 MIN TYP ±0.5 50 ±75 ±300 ±50 ±100 ±150 ±200 ±100 ±150 ±20 ±1 ±75 ±4000 ±50 ±4000 ±150 ±1000 ±100 ±1000 1.5 1.7 115 110 120 115 120 115 2.85 2.95 10 10 130 130 130 130 140 140 2.94 2.98 1 1 2 3 1.1 10 V– + 0.5 V+ – 0.5 0.75 1.2 10 V– + 0.5 –0.5 7.5 –3 10 10 MAX ±3 ±0.05 UNITS μV μV/°C nV/√mo pA pA pA pA pA pA pA pA μVP-P pF dB dB dB dB dB dB V V mV mV V/μs MHz mA μA V V μA kHz MIN TYP ±0.5 50 ±20 ±1 RS = 100Ω, 0.01Hz to 10Hz VCM = GND to (V+ – 1.3) VCM = GND to (V+ – 1.3) VS = 2.7V to 6V RL = 10k RL = 2k to GND RL = 10k to GND RL = 2k to GND RL = 10k to GND 115 110 120 115 120 115 2.85 2.95 1.5 1.7 l l l l l l l 130 130 130 130 140 140 2.94 2.98 1 1 2 3 0.75 V+ – 0.5 –0.5 7.5 –3 2050fb 4 LTC2050/LTC2050HV ELECTRICAL CHARACTERISTICS PARAMETER Input Offset Voltage Average Input Offset Drift Long-Term Offset Drift Input Bias Current LTC2050 LTC2050HV Input Offset Current LTC2050 LTC2050HV Input Noise Voltage Common Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Output Voltage Swing High Output Voltage Swing Low Slew Rate Gain Bandwidth Product Supply Current Shutdown Pin Input Low Voltage (VIL) Shutdown Pin Input High Voltage (VIH) Shutdown Pin Input Current Internal Sampling Frequency VSHDN = GND VSHDN = VIH, No Load VSHDN = VIL l l l l l l l l l The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (LTC2050, LTC2050HV) VS = 5V unless otherwise noted. (Note 3) C, I SUFFIXES CONDITIONS (Note 2) (Note 2) l H SUFFIX MAX ±3 ±0.03 MIN TYP ±0.5 50 ±150 ±300 ±50 ±150 ±300 ±400 ±100 ±200 ±75 ±7 ±150 ±4000 ±50 ±4000 ±300 ±1000 ±100 ±1000 1.5 120 110 120 115 125 115 4.85 4.95 10 10 130 130 130 130 140 140 4.94 4.98 1 1 2 3 1.2 15 V– + 0.5 V+ – 0.5 0.8 1.3 15 V– + 0.5 –0.5 7.5 –7 10 10 MAX ±3 ±0.05 UNITS μV μV/°C nV/√mo pA pA pA pA pA pA pA pA μVP-P dB dB dB dB dB dB V V mV mV V/μs MHz mA μA V V μA kHz MIN TYP ±0.5 50 ±75 ±7 RS = 100Ω, 0.01Hz to 10Hz VCM = GND to (V+ – 1.3) VCM = GND to (V+ – 1.3) VS = 2.7V to 6V RL = 10k RL = 2k to GND RL = 10k to GND RL = 2k to GND RL = 10k to GND l l l l l l l 1.5 120 115 120 115 125 120 4.85 4.95 130 130 130 130 140 140 4.94 4.98 1 1 2 3 0.8 V+ – 0.5 –0.5 7.5 –7 2050fb 5 LTC2050/LTC2050HV ELECTRICAL CHARACTERISTICS PARAMETER Input Offset Voltage Average Input Offset Drift Long-Term Offset Drift Input Bias Current (Note 4) Input Offset Current (Note 4) Input Noise Voltage Common Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Maximum Output Voltage Swing Slew Rate Gain Bandwidth Product Supply Current Shutdown Pin Input Low Voltage (VIL) Shutdown Pin Input High Voltage (VIH) Shutdown Pin Input Current Internal Sampling Frequency 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: These parameters are guaranteed by design. Thermocouple effects preclude measurements of these voltage levels during automated testing. Note 3: All versions of the LTC2050 are designed, characterized and expected to meet the extended temperature limits of – 40°C and 125°C. VSHDN = V– VSHDN = VIH, No Load VSHDN = VIL l l l l l l l (LTC2050HV) The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = ±5V unless otherwise noted. (Note 3) C, I SUFFIXES CONDITIONS (Note 2) (Note 2) l H SUFFIX MAX ±3 ±0.03 MIN TYP ±0.5 50 ±125 ±300 ±250 ±500 ±25 ±125 ±4000 ±250 ±1000 1.5 120 115 120 115 125 120 ±4.50 ±4.85 130 130 130 130 140 140 ±4.94 ±4.98 2 3 1.5 25 V– + 0.5 V+ – 0.5 1 1.6 25 V– + 0.5 –3 7.5 –20 MAX ±3 ±0.05 UNITS μV μV/°C nV/√mo pA pA pA pA μVP-P dB dB dB dB dB dB V V V/μs MHz mA μA V V μA kHz MIN TYP ±0.5 50 ±25 RS = 100Ω, 0.01Hz to 10Hz VCM = V– to (V+ – 1.3) VCM = V– to (V+ – 1.3) VS = 2.7V to 11V RL = 10k RL = 2k to GND RL = 10k to GND l l l l 1.5 120 115 120 115 125 120 ±4.75 ±4.90 130 130 130 130 140 140 ±4.94 ±4.98 2 3 1 V+ – 0.5 –3 7.5 –20 The LTC2050C/LTC2050HVC are guaranteed to meet the temperature limits of 0°C and 70°C. The LTC2050I/LTC2050HVI are guaranteed to meet the temperature limits of –40°C and 85°C. The LTC2050H/LTC2050HVH are guaranteed to meet the temperature limits of –40°C and 125°C. Note 4: The bias current measurement accuracy depends on the proximity of the supply bypass capacitor to the device under test, especially at ±5V supplies. Because of testing limitations on the placement of this bypass capacitor, the bias current at ±5V supplies is guaranteed by design to meet the data sheet limits, but tested to relaxed limits. 2050fb 6 LTC2050/LTC2050HV TYPICAL PERFORMANCE CHARACTERISTICS Common Mode Rejection Ratio vs Frequency 140 120 100 CMRR (dB) CMRR (dB) 80 60 40 20 0 1 10 100 1k FREQUENCY (Hz) 10k 100k 2050 G01 DC CMRR vs Common Mode Input Voltage 140 120 100 120 100 PSRR (dB) 80 VS = 3V 60 40 20 0 0 1 2 VCM (V) 3 TA = 25°C 4 5 2050 G02 PSRR vs Frequency VS = 3V OR 5V VCM = 0.5VP-P –PSRR 80 VS = 5V +PSRR 60 40 20 0 10 100 1k 10k FREQUENCY (Hz) 100k 1M 2050 G14 Output Voltage Swing vs Load Resistance 6 5 OUTPUT SWING (V) 4 3 2 1 0 0 2 8 6 4 LOAD RESISTANCE (kΩ) RL TO GND VS = 5V OUTPUT VOLTAGE (V) 6 5 4 3 Output Swing vs Output Current 5 4 VS = 5V OUTPUT SWING (V) 3 2 1 0 –1 –2 –3 –4 10 2050 G03 Output Swing vs Load Resistance ±5V Supply RL TO GND VS = 3V VS = 3V 2 1 0 0.01 –5 0.1 1 OUTPUT CURRENT (mA) 10 2050 G04 0 2 6 8 4 LOAD RESISTANCE (kΩ) 10 2050 G16 Output Swing vs Output Current ±5V Supply 5 4 3 OUTPUT SWING (V) 2 GAIN (dB) 1 0 –1 –2 –3 –4 –5 0.01 0.1 1.0 OUTPUT CURRENT (mA) 10 2050 G17 Gain/Phase vs Frequency 100 80 100 1k 120 PHASE (DEG) GAIN 140 160 VS = 3V OR 5V CL = 35pF RL = 10kΩ 1k 100k 10k FREQUENCY (Hz) 1M 180 200 10M 2050 G05 Bias Current vs Temperature 10k RL TO GND 80 PHASE 60 40 20 0 –20 BIAS CURRENT (pA) VS = 5V 100 10 VS = 3V –40 100 1 –50 –25 75 50 0 25 TEMPERATURE (°C) 100 125 2050 G06 2050fb 7 LTC2050/LTC2050HV TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current vs Input Common Mode Voltage 160 INPUT BIAS CURRENT MAGNITUDE (pA) 140 120 VS = 5V 100 80 60 40 20 0 0 4 3 INPUT COMMON MODE VOLTAGE (V) 1 2 5 VS = 3V INPUT BIAS CURRENT (pA) 60 50 40 30 20 10 0 –10 –5 –1 1 3 –3 INPUT COMMON MODE VOLTAGE (V) 5 VS = 3V VS = 5V AV = 1 RL = 100k CL = 50pF VS = 5V 1μs/DIV 2050 G07 Input Bias Current vs Input Common Mode Voltage (LTC2050HV) Transient Response VS = ±5V 0.5/DIV 2050 G13 2050 G15 Input Overload Recovery 10 1.5 SAMPLING FREQUENCY (kHz) 9 OUTPUT (V) 0 Sampling Frequency vs Supply Voltage 10 TA = 25°C SAMPLING FREQUENCY (kHz) 9 Sampling Frequency vs Temperature 8 8 VS = 5V 7 INPUT (V) –0.2 AV = –100 RL = 100k CL = 10pF VS = ±1.5V 500μs/DIV 2050 G08 0 7 6 6 5 2.5 3.0 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE (V) 5.5 6.0 5 –50 –25 50 25 0 75 TEMPERATURE (°C) 100 125 2050 G09 2050 G10 Supply Current vs Supply Voltage 1.2 TA = 25°C 1.0 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) 0.8 0.6 0.4 0.2 0 0.8 1.0 Supply Current vs Temperature VS = 5V VS = 3V 0.6 0.4 0.2 2 4 8 6 SUPPLY VOLTAGE (V) 10 2050 G11 0 –50 –25 50 25 0 75 TEMPERATURE (°C) 100 125 2050 G12 2050fb 8 LTC2050/LTC2050HV TEST CIRCUITS Electrical Characteristics Test Circuit 100k OUTPUT V+ 10Ω 4 – + 5 LTC2050 1 RL 2050 TC01 3 2 V– DC-10Hz Noise Test Circuit 100k 475k 10Ω 4 – LTC2050 1 0.01μF 158k 0.1μF 316k 475k 3 – 0.01μF LT1012 TO X-Y RECORDER + + FOR 1Hz NOISE BW INCREASE ALL THE CAPACITORS BY A FACTOR OF 10. 2050 TC02 2050fb 9 LTC2050/LTC2050HV APPLICATIONS INFORMATION Shutdown The LTC2050 includes a shutdown pin in the 6-lead SOT-23 and the SO-8 version. When this active low pin is high or allowed to float, the device operates normally. When the shutdown pin is pulled low, the device enters shutdown mode; supply current drops to 3μA, all clocking stops, and both inputs and output assume a high impedance state. Clock Feedthrough, Input Bias Current The LTC2050 uses auto-zeroing circuitry to achieve an almost zero DC offset over temperature, common mode voltage, and power supply voltage. The frequency of the clock used for auto-zeroing is typically 7.5kHz. The term clock feedthrough is broadly used to indicate visibility of this clock frequency in the op amp output spectrum. There are typically two types of clock feedthrough in auto zeroed op amps like the LTC2050. The first form of clock feedthrough is caused by the settling of the internal sampling capacitor and is input referred; that is, it is multiplied by the closed loop gain of the op amp. This form of clock feedthrough is independent of the magnitude of the input source resistance or the magnitude of the gain setting resistors. The LTC2050 has a residue clock feedthrough of less then 1μVRMS input referred at 7.5kHz. The second form of clock feedthrough is caused by the small amount of charge injection occurring during the sampling and holding of the op amp’s input offset voltage. The current spikes are multiplied by the impedance seen at the input terminals of the op amp, appearing at the output multiplied by the closed loop gain of the op amp. To reduce this form of clock feedthrough, use smaller valued gain setting resistors and minimize the source resistance at the input. If the resistance seen at the inputs is less than 10k, this form of clock feedthrough is less than 1μVRMS input referred at 7.5kHz, or less than the amount of residue clock feedthrough from the first form described above. Placing a capacitor across the feedback resistor reduces either form of clock feedthrough by limiting the bandwidth of the closed loop gain. Input bias current is defined as the DC current into the input pins of the op amp. The same current spikes that cause the second form of clock feedthrough described above, when averaged, dominate the DC input bias current of the op amp below 70°C. At temperatures above 70°C, the leakage of the ESD protection diodes on the inputs increases the input bias currents of both inputs in the positive direction, while the current caused by the charge injection stays relatively constant. At elevated temperatures (above 85°C) the leakage current begins to dominate and both the negative and positive pin’s input bias currents are in the positive direction (into the pins). Input Pins, ESD Sensitivity ESD voltages above 700V on the input pins of the op amp will cause the input bias currents to increase (more DC current into the pins). At these voltages, it is possible to damage the device to a point where the input bias current exceeds the maximums specified in this data sheet. 2050fb 10 LTC2050/LTC2050HV TYPICAL APPLICATIONS Single Supply Thermocouple Amplifier 1k 1% 100Ω 255k 1% 0.068μF 5V 2 LT1025A K GND 4 R– 5 7 5V 4 – + 0.1μF 5 LTC2050 2 1 VOUT 10mV/°C 3 – TYPE K + LT1025 COMPENSATES COLD JUNCTION OVER 0°C TO 100°C TEMPERATURE RANGE 2050 TA03 Gain of 1001 Single Supply Instrumentation Amplifier 10Ω V+ 10k 4 0.1μF 10k V+ 1 10Ω 4 – + 5 LTC2050 – + 5 LTC2050 1 VOUT –VIN 3 2 +VIN 3 2 2050 TA04 OUTPUT DC OFFSET ≤ 6mV FOR 0.1% RESISTORS, CMRR = 54dB 2050fb 11 LTC2050/LTC2050HV TYPICAL APPLICATIONS Instrumentation Amplifier with 100V Common Mode Input Voltage 1k V+ 1M + VIN – 1k 1M 4 1M – + 5 1 1k 4 V+ LTC2050HV 3 2 V– – + 5 1 VOUT LTC2050HV 3 2 V– OUTPUT OFFSET ≤3mV FOR 0.1% RESISTORS, CMRR = 54dB 2050 TA06 High Precision Three-Input Mux 1.1k 10k SHDN 4 Low-Side Power Supply Current Sensing 5V 3 5 1 OUT 3V/AMP LOAD CURRENT IN MEASURED CIRCUIT, REFERRED TO –5V – + 5 LTC2050 1 SEL1 + – LTC2050HV 4 10Ω 2 10k IN 1 3 AV = 10 10Ω 10k SHDN 5 LTC2050 1 OUT 4 SEL2 TO MEASURED CIRCUIT 3mΩ LOAD CURRENT –5V 0.1μF 2050 TA08 – + IN 2 3 AV = 1000 SHDN 4 – + 5 LTC2050 1 SEL3 IN 3 3 AV = 1 2050 TA07 SELECT INPUTS ARE CMOS LOGIC COMPATIBLE 2050fb 12 LTC2050/LTC2050HV PACKAGE DESCRIPTION S5 Package 5-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1635) 0.62 MAX 0.95 REF 2.90 BSC (NOTE 4) 1.22 REF 3.85 MAX 2.62 REF 1.4 MIN 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.30 – 0.45 TYP 5 PLCS (NOTE 3) 0.95 BSC 0.80 – 0.90 0.20 BSC 1.00 MAX DATUM ‘A’ 0.01 – 0.10 0.30 – 0.50 REF 0.09 – 0.20 (NOTE 3) NOTE: 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 1.90 BSC S5 TSOT-23 0302 REV B 2050fb 13 LTC2050/LTC2050HV PACKAGE DESCRIPTION S6 Package 6-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1636) 0.62 MAX 0.95 REF 2.90 BSC (NOTE 4) 1.22 REF 3.85 MAX 2.62 REF 1.4 MIN 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE ID RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.95 BSC 0.30 – 0.45 6 PLCS (NOTE 3) 0.80 – 0.90 0.20 BSC 1.00 MAX DATUM ‘A’ 0.01 – 0.10 0.30 – 0.50 REF NOTE: 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 0.09 – 0.20 (NOTE 3) 1.90 BSC S6 TSOT-23 0302 REV B 2050fb 14 LTC2050/LTC2050HV PACKAGE DESCRIPTION S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .045 ±.005 .050 BSC 8 .189 – .197 (4.801 – 5.004) NOTE 3 7 6 5 .245 MIN .160 ±.005 .228 – .244 (5.791 – 6.197) .150 – .157 (3.810 – 3.988) NOTE 3 .030 ±.005 TYP RECOMMENDED SOLDER PAD LAYOUT .010 – .020 × 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 0°– 8° TYP 1 2 3 4 .053 – .069 (1.346 – 1.752) .004 – .010 (0.101 – 0.254) .016 – .050 (0.406 – 1.270) NOTE: 1. DIMENSIONS IN INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) .014 – .019 (0.355 – 0.483) TYP .050 (1.270) BSC SO8 0303 2050fb 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 LTC2050/LTC2050HV TYPICAL APPLICATION Ground Referred Precision Current Sources LT1034 V+ 10k 4 0 ≤ IOUT ≤ 4mA (V–) + 1.5V ≤ VOUT ≤ – 1V – + 5 LTC2050 1 3 RSET 1.235V IOUT = ——— RSET + VOUT – + VOUT – 1.235V IOUT = ——— RSET 5 RSET 1 3 2 10k 4 + – LTC2050 2 V– 0 ≤ IOUT ≤ 4mA 0.2V ≤ VOUT ≤ (V+) – 1.5V LT1034 2050 TA05 RELATED PARTS PART NUMBER LTC1049 LTC1050 LTC1051/LTC1053 LTC1150 LTC1152 LT1677 LT1884/LT1885 LTC2051 DESCRIPTION Low Power Zero-Drift Op Amp Precision Zero-Drift Op Amp Precision Zero-Drift Op Amp ±15V Zero-Drift Op Amp Rail-to-Rail Input and Output Zero-Drift Op Amp Low Noise Rail-to-Rail Input and Output Precision Op Amp Rail-to-Rail Output Precision Op Amp Dual Zero-Drift Op Amp COMMENTS Low Supply Current 200μA Single Supply Operation 4.75V to 16V, Noise Tested and Guaranteed Dual/Quad High Voltage Operation ±18V Single Zero-Drift Op Amp with Rail-to-Rail Input and Output and Shutdown VOS = 90μV, VS = 2.7V to 44V VOS = 50μV, IB = 400pA, VS = 2.7V to 40V Dual Version of the LTC2050 in MS8 Package 2050fb 16 Linear Technology Corporation (408) 432-1900 ● FAX: (408) 434-0507 ● LT 0208 REV B • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 www.linear.com © LINEAR TECHNOLOGY CORPORATION 1999