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Design NotesPrecision Ultra Low Power High-Side Current Sense
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, TSOT-23, MS8 and DFN Packages
The LTC®2063 is a single low power, zero-drift, 20kHz amplifier. The LTC2063 enables 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 powerup, reducing total system power.
The LTC2063’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 allows the use of high value power-saving resistors in the feedback network.
With its ultralow quiescent current and outstanding precision, the LTC2063 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 device is 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
Markets & Technology
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)
Demonstration circuit 2837A is a customizable board showcasing the micropower zero-drift op amp LTC2063 (-A option) or LTC2066 (-B option) with shutdown in an SC70 6-pin package. The board is laid out for most common op amp applications and left mostly unstuffed to maximize flexibility for a wide range of applications.
The DC2837A includes the SC70 package op amp, jumpers, unity gain configuration resistors, input lowpass filters, reverse supply protection, and supply bypass capacitors on a small printed circuit board with turrets and SMA connectors for input, output, power and shutdown. The board may be used in split rail or single supply as desired.The user only needs to furnish external ±2.5V split supplies and an input signal to operate the board. An external shutdown signal can be applied as well to demonstrate the very minimal transient current when starting up the part from shutdown.
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.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Models for the following parts are available in LTspice:
Use the Analog Filter Wizard to design low-pass, high-pass, or band-pass filters with actual op amps in minutes. As you progress through the design process, you can observe the characteristics of your filter design from ideal specifications to real world circuit behavior. Quickly evaluate the tradeoffs in op amp specifications - including gain-bandwidth, noise, and supply current – to determine the best filter design for your requirements.
LTC2063 Companion Parts
Recommended Related Parts
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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.