Features and Benefits
- Low Supply Current: 2μA Maximum (per Amplifier)
- Offset Voltage: 5μV Maximum
- Offset Voltage Drift: 0.02μV/°C Maximum
- Input Bias Current:
- 3pA Typical
- 30pA Maximum, –40°C to 85°C
- 100pA Maximum, –40°C to 125°C
- Integrated EMI Filter (114dB 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
The LTC2063/LTC2064/LTC2065 are single, dual, and quad low power, zero-drift, 20kHz amplifiers. The LTC2063/LTC2064/LTC2065 enable high resolution measurement at extremely low power levels.
Typical supply current is 1.4µA per amplifier with a maximum of 2µA. The available shutdown mode has been optimized to minimize power consumption in duty-cycled applications and features low charge loss during power-up, reducing total system power.
The LTC2063/LTC2064/LTC2065’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 20pA and does not exceed 100pA over the full specified temperature range. The extremely low input bias current of the LTC2063/LTC2064/LTC2065 allows the use of high value power-saving resistors in the feedback network.
With its ultralow quiescent current and outstanding precision, the LTC2063/LTC2064/LTC2065 can serve as a signal chain building block in portable, energy harvesting and wireless sensor applications.
The LTC2063 is available in 6-lead SC70 and 5-lead TSOT-23 packages. The LTC2064 is available in 8-lead MSOP and 10-lead DFN packages. The LTC2065 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.
- 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
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
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
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.
Models for the following parts are available in LTspice:
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.