LTC1278 - 12-Bit, 500ksps Sampling A/D Converter with Shutdown
Features
- Single Supply 5V or ±5V Operation
- Two Speed Grades,500ksps (LTC1278-5)
400ksps (LTC1278-4) - 70dB S/(N + D) and 74dB THD at Nyquist
- No Missing Codes Over Temperature
- 75mW (Typ) Power Dissipation
- Power Shutdown with Instant Wake-Up
- Internal Reference Can Be Overdriven Externally
- Internal Synchronized Clock; No Clock Required
- High Impedance Analog Input
- 0V to 5V or ±2.5V Input Range
- New Flexible, Friendly Parallel Interface to DSPs and FIFOs
- 24-Pin SOL Packages
Typical Application
Description
The LTC1278 is a 1.6µs, 500ksps, sampling 12-bit A/D converter that draws only 75mW from a single 5V or ±5V supplies. This easy-to-use device comes complete with a 200ns sample-and-hold, a precision reference and an internally trimmed clock. Unipolar and bipolar conversion modes add to the flexibility of the ADC. The low power dissipation is made even more attractive by a 8.5mW power-down feature. Instant wake-up from shutdown allows the converter to be powered down even during brief inactive periods.The LTC1278 converts 0V to 5V unipolar inputs from a single 5V supply and ±2.5V bipolar inputs from ±5V supplies. Maximum DC specs include ±1LSB INL and ±1LSB DNL. Outstanding guaranteed AC performance includes 70dB S/(N + D) and 78dB THD at the input frequency of 100kHz over temperature.The internal clock is trimmed for 1.6µs conversion time. The clock automatically synchronizes to each sample command, eliminating problems with asynchronous clock noise found in competitive devices. A separate convert start input and a data ready signal (BUSY) ease connections to FIFOs, DSPs and microprocessors.
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 |
|---|---|---|---|---|---|
| LTC1278-4CN#PBF | N-24 | N | C | 05-08-1510 (N24) | Yes |
| LTC1278-4CSW#PBF | SW-24 | SW | C | 05-08-1620 (SW24) | Yes |
| LTC1278-4CSW#TRPBF | SW-24 | SW | C | 05-08-1620 (SW24) | Yes |
| LTC1278-4IN#PBF | N-24 | N | I | 05-08-1510 (N24) | Yes |
| LTC1278-4ISW#PBF | SW-24 | SW | I | 05-08-1620 (SW24) | Yes |
| LTC1278-4ISW#TRPBF | SW-24 | SW | I | 05-08-1620 (SW24) | Yes |
| LTC1278-5CSW#PBF | SW-24 | SW | C | 05-08-1620 (SW24) | Yes |
| LTC1278-5CSW#TRPBF | SW-24 | SW | C | 05-08-1620 (SW24) | Yes |
| LTC1278-5ISW#PBF | SW-24 | SW | I | 05-08-1620 (SW24) | Yes |
| LTC1278-5ISW#TRPBF | SW-24 | SW | I | 05-08-1620 (SW24) | 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 | |
|---|---|---|---|---|---|---|
| LTC1278-4CN#PBF | N-24 | C | $16.00 | $12.65 | Yes | |
| LTC1278-4CSW#PBF | SW-24 | C | $16.00 | $12.65 | Yes | |
| LTC1278-4CSW#TRPBF | SW-24 | C | $12.75 | Yes | ||
| LTC1278-4IN#PBF | N-24 | I | $18.35 | $14.45 | Yes | |
| LTC1278-4ISW#PBF | SW-24 | I | $18.35 | $14.45 | Yes | |
| LTC1278-4ISW#TRPBF | SW-24 | I | $14.55 | Yes | ||
| LTC1278-5CSW#PBF | SW-24 | C | $17.10 | $13.50 | Yes | |
| LTC1278-5CSW#TRPBF | SW-24 | C | $13.60 | Yes | ||
| LTC1278-5ISW#PBF | SW-24 | I | $19.60 | $15.45 | Yes | |
| LTC1278-5ISW#TRPBF | SW-24 | I | $15.55 | 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
- Digital Signal Processing
- Multiplexed Data Acquisition Systems
- Audio and Telecom Processing
- 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.
