LTC2451 - Ultra-Tiny, 16-Bit ΔΣ ADC with I2C Interface
Features
- GND to VCC Single-Ended Input Range
- 0.02LSB RMS Noise
- 2LSB INL, No Missing Codes
- 1LSB Offset Error
- 4LSB Full-Scale Error
- Programmable 30/60 Conversions per Second
- Single Conversion Settling Time for Multiplexed Applications
- Single-Cycle Operation with Auto Shutdown
- 400μA Supply Current
- 0.2μA Sleep Current
- Internal Oscillator—No External Components Required
- Single Supply, 2.7V to 5.5V Operation
- 2-Wire I2C Interface
- Ultra-Tiny 3mm × 2mm DFN or TSOT-23 Package
AEC-Q100 data available for specific packages
Typical Application
Description
The LTC2451 is an ultra-tiny, 16-bit, analog-to-digital converter. The LTC2451 uses a single 2.7V to 5.5V supply, accepts a single-ended analog input voltage and communicates through an I2C interface. The converter is available in an 8-pin, 3mm × 2mm DFN or TSOT-23 package. It includes an integrated oscillator that does not require any external components. It uses a delta-sigma modulator as a converter core and provides single-cycle settling time for multiplexed applications. The LTC2451 includes a proprietary input sampling scheme that reduces the average input sampling current several orders of magnitude lower than conventional ΔΣ converters.
The LTC2451 is capable of up to 60 conversions per second and, due to the very large oversampling ratio, has extremely relaxed antialiasing requirements. In the 30Hz mode, the LTC2451 includes continuous internal offset calibration algorithms which are transparent to the user, ensuring accuracy over time and over the operating temperature range. The converter has external REF+ and REF– pins and the input voltage can range from VREF – to VREF +. If VREF + = VCC and VREF – = GND, the input voltage can range from GND to VCC.
Following a single conversion, the LTC2451 can automatically enter sleep mode and reduce its power to less than 0.2μA. If the user reads the ADC once per second, the LTC2451 consumes an average of less than 50μW from a 2.7V supply.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC2451CDDB#PBF | 3x2 DFN-8 | DDB | C | 05-08-1702 | Yes |
| LTC2451CDDB#TRMPBF | 3x2 DFN-8 | DDB | C | 05-08-1702 | Yes |
| LTC2451CDDB#TRPBF | 3x2 DFN-8 | DDB | C | 05-08-1702 | Yes |
| LTC2451CTS8#PBF | SOT-23 | TS8 | C | 05-08-1637 | Yes |
| LTC2451CTS8#TRMPBF | SOT-23 | TS8 | C | 05-08-1637 | Yes |
| LTC2451CTS8#TRPBF | SOT-23 | TS8 | C | 05-08-1637 | Yes |
| LTC2451IDDB#PBF | 3x2 DFN-8 | DDB | I | 05-08-1702 | Yes |
| LTC2451IDDB#TRMPBF | 3x2 DFN-8 | DDB | I | 05-08-1702 | Yes |
| LTC2451IDDB#TRPBF | 3x2 DFN-8 | DDB | I | 05-08-1702 | Yes |
| LTC2451ITS8#PBF | SOT-23 | TS8 | I | 05-08-1637 | Yes |
| LTC2451ITS8#TRMPBF | SOT-23 | TS8 | I | 05-08-1637 | Yes |
| LTC2451ITS8#TRPBF | SOT-23 | TS8 | I | 05-08-1637 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC2451CDDB#PBF | 3x2 DFN-8 | C | $2.14 | Yes | ||
| LTC2451CDDB#TRMPBF | 3x2 DFN-8 | C | $2.14 | $1.20 | Yes | |
| LTC2451CDDB#TRPBF | 3x2 DFN-8 | C | $2.14 | $1.15 | Yes | |
| LTC2451CTS8#PBF | SOT-23 | C | $2.14 | Yes | ||
| LTC2451CTS8#TRMPBF | SOT-23 | C | $2.14 | $1.20 | Yes | |
| LTC2451CTS8#TRPBF | SOT-23 | C | $2.14 | $1.15 | Yes | |
| LTC2451IDDB#PBF | 3x2 DFN-8 | I | $2.55 | Yes | ||
| LTC2451IDDB#TRMPBF | 3x2 DFN-8 | I | $2.55 | $1.43 | Yes | |
| LTC2451IDDB#TRPBF | 3x2 DFN-8 | I | $2.55 | $1.38 | Yes | |
| LTC2451ITS8#PBF | SOT-23 | I | $2.55 | Yes | ||
| LTC2451ITS8#TRMPBF | SOT-23 | I | $2.55 | $1.43 | Yes | |
| LTC2451ITS8#TRPBF | SOT-23 | I | $2.55 | $1.38 | Yes | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1383A-A | LTC2451: 16-bit Single-Ended I2C Ultra-Tiny ADC (req. DC590) | $50.00 | |
| Buy Now | |||
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC590B | Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards | $50.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC2451IDDB#PBF | 3x2 DFN-8 | I | $2.55 | Yes | ||
| LTC2451IDDB#TRMPBF | 3x2 DFN-8 | I | $2.55 | $1.43 | Yes | |
| LTC2451IDDB#TRPBF | 3x2 DFN-8 | I | $2.55 | $1.38 | Yes | |
| LTC2451ITS8#PBF | SOT-23 | I | $2.55 | Yes | ||
| LTC2451ITS8#TRMPBF | SOT-23 | I | $2.55 | $1.43 | Yes | |
| LTC2451ITS8#TRPBF | SOT-23 | I | $2.55 | $1.38 | Yes | |
| Buy Now • Request Samples | ||||||
Applications
- System Monitoring
- Environmental Monitoring
- Direct Temperature Measurements
- Instrumentation
- Industrial Process Control
- Data Acquisition
- Embedded ADC Upgrades
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Design Tools
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:
- LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
- LTpowerCAD - A complete power supply selection, synthesis and design tool
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
