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LTC2068

LTC2068
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LTC2066/LTC2067/LTC2068 10µA Supply Current, Low IB, Zero-Drift Operational Amplifier FEATURES Low Supply Current: 10μA Maximum (per Amplifier) n Offset Voltage: 5μV Maximum n Offset Voltage Drift: 0.02μV/°C Maximum n Input Bias Current: n 5pA Typical n 50pA Maximum, –40°C to 85°C n 150pA Maximum, –40°C to 125°C n Integrated EMI Filter (90dB Rejection at 1.8GHz) n Shutdown Current: 170nA Maximum (per Amplifier) n Rail-to-Rail Input and Output n 1.7V to 5.25V Operating Supply Range n A VOL: 140dB Typical n Low-Charge Power-Up for Duty Cycled Applications n Specified Temperature Ranges: n –40°C to 85°C n –40°C to 125°C n SC70, TSOT23, MS8, DFN10, TSSOP14 and QFN16 Packages The LTC®2066/LTC2067/LTC2068 are single, dual, and quad low power, zero-drift, 100kHz amplifiers. The LTC2066/LTC2067/LTC2068 enable high resolution measurement at extremely low power levels. APPLICATIONS Signal Conditioning in Wireless Mesh Networks Portable Instrumentation Systems n Low-Power Sensor Conditioning n Gas Detection n Temperature Measurement n Medical Instrumentation n Energy Harvesting Applications n Low Power Current Sensing n n Typical supply current is 7.5µA per amplifier with a maximum of 10µA. The available shutdown mode has been optimized to minimize power consumption in duty-cycled applications and features low charge loss during powerup, reducing total system power. The LTC2066/LTC2067/LTC2068’s self-calibrating circuitry results in very low input offset (5µV max) and offset drift (0.02µV/°C). The maximum input bias current is only 35pA and does not exceed 150pA over the full specified temperature range. The extremely low input bias current of the LTC2066/LTC2067/LTC2068 allows the use of high value power-saving resistors in the feedback network. With its ultralow quiescent current and outstanding precision, the LTC2066/LTC2067/LTC2068 can serve as a signal chain building block in portable, energy harvesting and wireless sensor applications. The LTC2066 is available in 6-lead SC70 and 5-lead TSOT23 packages. The LTC2067 is available in 8-lead MSOP and 10-lead DFN packages. The LTC2068 is available in 14-lead TSSOP and 16-lead 3mm × 3mm QFN packages. These devices are fully specified over the –40°C to 85°C and –40°C to 125°C temperature ranges. All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION Output Voltage vs Sense Current 2.5 Precision Micropower Low Side Current Sense 1M 0.1% 1 OUTPUT VOLTAGE, VOUT (V) *RESISTOR CANCELS OUT PARASITIC SEEBECK EFFECT VOLTAGE Document Feedba

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LTC2066/LTC2067/LTC2068 ABSOLUTE MAXIMUM RATINGS SC6 PACKAGE 6-LEAD PLASTIC SC70 θJA = 265°C/W (Note 5) MS8 PACKAGE 8-LEAD PLASTIC MSOP θJA = 163°C/W, θJC = 40°C/W (Note 5) SHDN OUTA OUTD NC QFN16 PACKAGE 16-LEAD (3mm × 3mm) PLASTIC QFN θJA = 68°C/W (NOTE 5) EXPOSED PAD (PIN 17) MUST BE CONNECTED TO V–(PIN 10) S5 PACKAGE 5-LEAD PLASTIC TSOT-23 θJA = 215°C/W (Note 5) DD PACKAGE 10-LEAD (3mm × 3mm) PLASTIC DFN θJA = 43°C/W, θJC = 5.5°C/W (Note 5) EXPOSED PAD (PIN 11) IS CONNECTED TO V– (PIN 4) (PCB CONNECTION OPTIONAL) TSSOP14 PACKAGE 14-LEAD PLASTIC TSSOP θJA = 100°C/W (NOTE 5) ORDER...

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The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. Unless otherwise noted, VS = 1.8V, VCM = VOUT = VS/2, VSHDN = 1.8V, RL to VS/2. SYMBOL PARAMETER Input Offset Voltage Drift (Note 6) Input Bias Current (Note 7) Input Offset Current (Note 7) Input Noise Current Spectral Density Input Noise Voltage Spectral Density Input Noise Voltage Input Capacitance Differential Common Mode Input Voltage Range CMRR PSRR Input Offset Voltage (Note 6) Common Mode Rejection Ratio (Note 8) Power Supply Rejection Ratio μV/°C µV/°C...

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The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. Unless otherwise noted, VS = 5V, VCM = VOUT = VS/2, VSHDN = 5V, RL to VS/2. SYMBOL PARAMETER Input Offset Voltage Drift (Note 6) Input Bias Current Input Offset Current μV/°C µV/°C Input Offset Voltage (Note 6) Input Noise Current Spectral Density Input Noise Voltage Spectral Density Input Noise Voltage CMRR PSRR Input Capacitance Differential Common Mode Input Voltage Range Common Mode Rejection Ratio Power Supply Rejection Ratio EMI Rejection Ratio VRF =...

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LTC2066/LTC2067/LTC2068 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. Unless otherwise noted, VS = 5V, VCM = VOUT = VS/2, VSHDN = 5V, RL to VS/2. SYMBOL PARAMETER SHDN Pin Threshold, Logic High (Referred to V–) SHDN Pin Threshold, Logic Low (Referred to V–) 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....

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LTC2066/LTC2067/LTC2068 TYPICAL PERFORMANCE CHARACTERISTICS 80 Input Offset Voltage Drift Distribution (H-Grade) 120 Input Offset Voltage vs Input Common Mode Voltage Input Offset Voltage vs Supply Voltage 10 Input Offset Voltage Drift Distribution (I-Grade) Input Offset Voltage vs Input Common Mode Voltage 4 Input Offset Voltage Drift Distribution (I-Grade) Input Offset Voltage Drift Distribution (H-Grade) Input Offset Voltage Distribution Input Offset Voltage Distribution

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LTC2066/LTC2067/LTC2068 TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current Distribution 1500 Input Bias Current Distribution 1500 Input Bias Current vs Input Common Mode Voltage 20 Input Bias Current vs Input Common Mode Voltage 10 8 Input Bias Current vs Supply Voltage 10 Input Bias Current vs Temperature 25

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