LTC1851 - 8-Channel, 12-Bit, 1.25Msps Sampling ADCs
Features
- Flexible 8-Channel Multiplexer
- Single-Ended or Differential Inputs
- Two Gain Ranges Plus Unipolar and Bipolar Operation
- 1.25Msps Sampling Rate
- Single 5V Supply and 40mW Power Dissipation
- Scan Mode and Programmable Sequencer
- Pin Compatible 10-Bit LTC1850 and 12-Bit LTC1851
- True Differential Inputs Reject Common Mode Noise
- Internal 2.5V Reference
- Parallel Output Includes MUX Address
- Easy Interface to 3V Logic
- Nap and Sleep Shutdown Modes
Typical Application
Description
The 10-bit LTC®1850 and 12-bit LTC1851 are complete 8-channel data acquisition systems. They include a flexible 8-channel multiplexer, a 1.25Msps successive approximation analog-to-digital converter with sample-and-hold, an internal 2.5V reference and reference buffer amplifier, and a parallel output interface. The multiplexer can be configured for single-ended or differential inputs, two gain ranges and unipolar or bipolar operation.
The ADCs have a scan mode that will repeatedly cycle through all 8 multiplexer channels and can also be programmed with a sequence of up to 16 addresses and configurations that can be scanned in succession. The sequence memory can also be read back. The reference and buffer amplifier provide pin strappable ranges of 4.096V, 2.5V and 2.048V. The parallel output includes the 10-bit or 12-bit conversion result plus the 4-bit multiplexer address. The digital outputs are powered from a separate supply allowing for easy interface to 3V digital logic. Typical power consumption is 40mW at 1.25Msps from a single 5V 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 |
|---|---|---|---|---|---|
| LTC1851CFW#PBF | TSSOP-48 | FW | C | 05-08-1651 | Yes |
| LTC1851CFW#TRPBF | TSSOP-48 | FW | C | 05-08-1651 | Yes |
| LTC1851IFW#PBF | TSSOP-48 | FW | I | 05-08-1651 | Yes |
| LTC1851IFW#TRPBF | TSSOP-48 | FW | I | 05-08-1651 | 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 | |
|---|---|---|---|---|---|---|
| LTC1851CFW#PBF | TSSOP-48 | C | $9.65 | $6.95 | Yes | |
| LTC1851CFW#TRPBF | TSSOP-48 | C | $7.07 | Yes | ||
| LTC1851IFW#PBF | TSSOP-48 | I | $11.05 | $7.95 | Yes | |
| LTC1851IFW#TRPBF | TSSOP-48 | I | $8.07 | 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.Click here to view our complete list of demo boards
Applications
- High Speed Data Acquisition
- Test and Measurement
- Imaging Systems
- Telecommunications
- Industrial Process Control
- Spectrum Analysis
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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.
