LTC2068
Info : RECOMMENDED FOR NEW DESIGNS
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LTC2068

Quad 10μA Supply Current, Low IB, Zero-Drift Operational Amplifier

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 8
1ku List Price Starting From $2.56
Features
  • Low Supply Current: 10μA Maximum (per Amplifier)
  • Offset Voltage: 5μV Maximum
  • Offset Voltage Drift: 0.02μV/°C Maximum
  • Input Bias Current:
    • 5pA Typical
    • 50pA Maximum, –40°C to 85°C
    • 150pA Maximum, –40°C to 125°C
  • Integrated EMI Filter (90dB Rejection at 1.8GHz)
  • Shutdown Current: 170nA Maximum (per Amplifier)
  • Rail-to-Rail Input and Output
  • 1.7V to 5.25V Operating Supply Range
  • AVOL: 140dB Typical
  • Low-Charge Power-Up for Duty Cycled Applications
  • Specified Temperature Ranges:
    • –40°C to 85°C
    • –40°C to 125°C
  • SC70, TSOT23, MS8, DFN10, TSSOP14 and QFN16 Packages
Additional Details
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The LTC2066/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.

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 TSOT-23 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.

Applications

  • Signal Conditioning in Wireless Mesh Networks
  • Portable Instrumentation Systems
  • Low-Power Sensor Conditioning
  • Gas Detection
  • Temperature Measurement
  • Medical Instrumentation
  • Energy Harvesting Applications
  • Low Power Current Sensing
Part Models 8
1ku List Price Starting From $2.56

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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LTC2068IF#PBF
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LTC2068IUD#PBF
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LTC2068IUD#TRPBF
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Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LTC2068HF#PBF

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Filter by Model

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Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LTC2068HF#PBF

PRODUCTION

LTC2068HF#TRPBF

PRODUCTION

LTC2068IF#PBF

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LTC2068IF#TRPBF

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Software and Part Ecosystem

Software and Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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EVAL-LTC2065-TQFN

LTC2065/LTC2068 Evaluation Board

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EVAL-LTC2065-TQFN

LTC2065/LTC2068 Evaluation Board

LTC2065/LTC2068 Evaluation Board

Features and Benefits

  • Fully featured evaluation board for the LTC2065/LTC2068
  • Enables efficient prototyping
  • User defined circuit configuration
  • Simplified connection to test equipment and other circuits

Product Detail

TThe EVAL-LTC2065/LTC2068-TQFN evaluates the LTC2065 and LTC2068 16-lead, quad-channel, lead frame chip scale package (LFCSP)/quad flat no-lead (QFN) operational amplifier (op amp). The EVAL-LTC2065/LTC2068-TQFN is a prepopulated board using a gain of 2 configuration with a low-pass filter at the noninverting input. This filter has a cutoff frequency of 480 Hz for the LTC2065 and 2.4 kHz for the LTC2068. This frequency minimizes the effect of chopper clock feedthrough to at least a decade below the internal chopping frequency of 5 kHz and 25 kHz for the LTC2065 and LTC2068, respectively. Signal bandwidths are also limited due to slew rate limitations of the devices.

The EVAL-LTC2065/LTC2068-TQFN design allows simplified and efficient use. Bulk test points are used for the inputs and outputs. The optimized EVAL-LTC2065/LTC2068-TQFN ground plane, component placement, and power supply allow maximum circuit flexibility and performance. The exposed pad (EPAD) is shorted to the V− pin (also connected to the VS− turret), which is required for device operation. The EVAL-LTC2065/LTC2068-TQFN combines surface-mount technology (SMT) with almost all components being 0805 in size to provide simplified installation and the option to replace and solder when needed, except for the bypass capacitors (C1 to C4) that are fixed in 0603 sizes. The EVAL-LTC2065/LTC2068-TQFN also has unpopulated resistor and capacitor pads, which provide the user with the options and flexibility to implement different application circuits and configurations, such as active loop filters, transimpedance amplifiers (TIAs), and sense amplifiers.

Refer to the LTC2065 and LTC2068 data sheet for full specifications in conjunction with this user guide when using the EVAL-LTC2065/LTC2068-TQFN.

Tools & Simulations

Tools & Simulations 4

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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