LTC2471 - Selectable 208sps/833sps, 16-Bit I2C ΔΣ ADCs with 10ppm/°C Max Precision Reference
Features
- 16-Bit Resolution
- Internal, High Accuracy Reference—10ppm/°C (Max)
- Single-Ended (LTC2471) or Differential (LTC2473)
- Selectable 208sps/833sps Output Rate
- 1mV Offset Error
- 0.01% Gain Error
- Single Conversion Settling Time Simplifies Multiplexed Applications
- Single-Cycle Operation with Auto Shutdown
- 3.5mA (Typ) Supply Current
- 2μA (Max) Sleep Current
- Internal Oscillator—No External Components Required
- I2C Interface
- Small 12-Lead, 3mm × 3mm DFN and MSOP Packages
Typical Application
Description
The LTC®2471/LTC2473 are small, 16-bit analog-to-digital converters with an integrated precision reference and a selectable 208sps or 833sps output rate. They use a single 2.7V to 5.5V supply and communicate through an I2C Interface. The LTC2471 is single-ended with a 0V to VREF input range and the LTC2473 is differential with a ±VREF input range. Both ADCs include a 1.25V integrated reference with 2ppm/°C drift performance and 0.1% initial accuracy. The converters are available in a 12-pin DFN 3mm × 3mm package or an MSOP-12 package. They include an integrated oscillator and perform conversions with no latency for multiplexed applications. The LTC2471/ LTC2473 include a proprietary input sampling scheme that reduces the average input current several orders of magnitude when compared to conventional delta sigma converters.
Following a single conversion, the LTC2471/LTC2473 automatically power down the converter and can also be configured to power down the reference. When both the ADC and reference are powered down, the supply current is reduced to 200nA.
The LTC2471/LTC2473 include a user selectable 208sps or 833sps output rate and due to a large oversampling ratio (8,192 at 208sps and 2,048 at 833sps) have relaxed anti-aliasing requirements.
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 |
|---|---|---|---|---|---|
| LTC2471CDD#PBF | 3x3 DFN-12 | DD | C | 05-08-1725 | Yes |
| LTC2471CDD#TRPBF | 3x3 DFN-12 | DD | C | 05-08-1725 | Yes |
| LTC2471CMS#PBF | MS-12 | MS | C | 05-08-1668 | Yes |
| LTC2471CMS#TRPBF | MS-12 | MS | C | 05-08-1668 | Yes |
| LTC2471IDD#PBF | 3x3 DFN-12 | DD | I | 05-08-1725 | Yes |
| LTC2471IDD#TRPBF | 3x3 DFN-12 | DD | I | 05-08-1725 | Yes |
| LTC2471IMS#PBF | MS-12 | MS | I | 05-08-1668 | Yes |
| LTC2471IMS#TRPBF | MS-12 | MS | I | 05-08-1668 | 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 | |
|---|---|---|---|---|---|---|
| LTC2471CDD#PBF | 3x3 DFN-12 | C | $2.43 | $1.70 | Yes | |
| LTC2471CDD#TRPBF | 3x3 DFN-12 | C | $1.76 | Yes | ||
| LTC2471CMS#PBF | MS-12 | C | $2.43 | $1.70 | Yes | |
| LTC2471CMS#TRPBF | MS-12 | C | $1.76 | Yes | ||
| LTC2471IDD#PBF | 3x3 DFN-12 | I | $2.79 | $1.95 | Yes | |
| LTC2471IDD#TRPBF | 3x3 DFN-12 | I | $2.01 | Yes | ||
| LTC2471IMS#PBF | MS-12 | I | $2.79 | $1.95 | Yes | |
| LTC2471IMS#TRPBF | MS-12 | I | $2.01 | 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 |
|---|---|---|---|
| DC1718A | LTC2471 - Selectable 208sps/833sps, 16-Bit I2C Delta Sigma ADCs with 10ppm/C Max Precision Reference (Req DC590B) | $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 | |||
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.
