Features and Benefits
- Low Drift:
- A-Grade: 10ppm/°C Max
- B-Grade: 20ppm/°C Max
- High Accuracy:
- A-Grade: ±0.05% Max
- B-Grade: ±0.10% Max
- Low Noise: 1.6ppmP-P (0.1Hz to 10Hz)
- Wide Supply Range to 36V
- Low Thermal Hysteresis: LS8 15ppm (–40°C to 125°C)
- Long Term Drift: (LS8) 15ppm/√kHr
- Line Regulation (Up to 36V): 5ppm/V Max
- Low Dropout Voltage: 100mV Max
- Sinks and Sources ±10mA
- Load Regulation at 10mA: 8ppm/mA Max
- Fully Specified from –55°C to 125°C
- Available Output Voltage Options: 1.25V, 2.048V, 2.5V, 3V, 3.3V, 4.096V, 5V
- Low Profile (1mm) ThinSOT™ Package and 5mm × 5mm Surface Mount Hermetic Package
The LT6654 is a family of small precision voltage references that offers high accuracy, low noise, low drift, low dropout and low power. The LT6654 operates from voltages up to 36V and is fully specified from –55°C to 125°C. A buffered output ensures ±10mA of output drive with low output impedance and precise load regulation. These features, in combination, make the LT6654 ideal for portable equipment, industrial sensing and control, and automotive applications.
The LT6654 was designed with advanced manufacturing techniques and curvature compensation to provide 10ppm/°C temperature drift and 0.05% initial accuracy. Low thermal hysteresis ensures high accuracy and 1.6ppmP-P noise minimizes measurement uncertainty. Since the LT6654 can also sink current, it can operate as a low power negative voltage reference with the same precision as a positive reference.
The LT6654 references are offered in 6-lead SOT-23 package and an 8-lead LS8 package. The LS8 is a 5mm × 5mm surface mount hermetic package that provides outstanding stability.
- Automotive Control and Monitoring
- High Temperature Industrial
- High Resolution Data Acquisition Systems
- Instrumentation and Process Control
- Precision Regulators
- Medical Equipment
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
The DC2126A is a high-accuracy wireless temperature sensor, powered from ambient light, built using ADI integrated circuits. A 24-bit delta-sigma ADC reads a thermistor biased from a precision voltage reference. A switching power supply harvests energy from the built-in solar panel, and automatically switches over to the internal battery when no ambient light is available.
At the core of the DC2126A is the LTP5901-IPM, SmartMesh IP wireless mote (node), which provides the ultra-low power wireless mesh connectivity with >99.999% data reliability and communicates the temperature to a central access point (manager). The LTP5901-IPM has on board an ARM Cortex-M3 processor, which can be loaded with user-developed application code using the SmartMesh IP On-Chip Software Development Kit (On-Chip SDK). In the DC2126A, custom application code controls the duty cycling of the voltage reference, samples readings from the ADC and sends the data packet through the SmartMesh IP network, as detailed in this LT Journal article.
|LTC Part Number||Function||Benefits|
|LTC2484||24-bit delta-sigma ADC, reads thermistor||Easy-Drive inputs allow direct hook-up of thermistor|
|LT6654||Low Noise Voltage Reference||Bias thermistor for low noise reading of temperature|
|LTP5901-IPM||SmartMesh IP Mote PCB Module||Automatically forms low power, reliable wireless mesh network.Built-in microprocessor manages ADC and power supplies|
|LTC3330||Energy Harvesting DC/DC Converter||Prioritizes between solar power and battery power|
The DC2126A can be easily added to the DC9000B SmartMesh IP Starter Kit, or any SmartMesh IP network. Temperature readings are sent through the mesh network to a demonstration PC software GUI that displays temperature, and whether the DC2126A is running on solar power or on battery.
DC2126A Demo Manual - step by step instructions to operate the DC2126A
DC2126A Circuit Description (from LT Journal, July 2014) - describes theory of operation of the DC2126A circuit
SmartMesh IP Starter Kits - other SmartMesh IP demo boards
SmartMesh IP On-Chip Software Development Kit - Enables users to develop application code to run on a SmartMesh IP Mote
|Software Name||Software Description||Weblink|
|"DC2126A.exe"||Demonstration GUI software that displays temperature and power source data sent wirelessly through the mesh. Runs on the user's Windows PC connected to a SmartMesh IP network manager.||Part of the SmartMesh IP SDK|
|FTDI Driver||USB-to-Serial drivers for communication with a SmartMesh IP manager (e.g. DC9001B SmartMesh IP Evaluation manager)||Download VCP from ftdichip.com|
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:
LT6654 Companion Parts
Recommended Related Parts
Product Selector Card (1)
Solutions Bulletins & Brochures (1)
Technical Articles (1)
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.