LTC1275 - 12-Bit, 300ksps Sampling A/D Converters with Reference
Features
- Single Supply 5V or ±5V Operation
- 300ksps Sample Rate
- 75mW (Typ) Power Dissipation
- On-Chip 25ppm/°C Reference
- Internal Synchronized Clock; No Clock Required
- High Impedance Analog Input
- 70dB S/(N + D) and 77dB THD at Nyquist
- ±1/2LSB INL and ±3/4LSB DNL Max (A Grade)
- ESD Protected On All Pins
- 24-Pin Narrow PDIP and SW Packages
- Variety of Input Ranges:
0V to 5V (LTC1273)
±2.5V (LTC1275)
±5V (LTC1276)
Typical Application
Description
The LTC1273/LTC1275/LTC1276 are 300ksps, sampling 12-bit A/D converters that draw only 75mW from single 5V or ±5V supplies. These easy-to-use devices come complete with 600ns sample-and-holds, precision references and internally trimmed clocks. Unipolar and larcon version modes provide flexibility for various cations. They are built with LTBiCMOS (TM) switched capacitor technology.
These devices have 25ppm/°C (max) internal references. The LTC1273 converts 0V to 5V unipolar inputs from a single 5V supply. The LTC1275/LTC1276 convert ±2.5V and ±5V respectively from ±5V supplies. Maximum DC specifications include ±1/2LSB INL, ±3/4LSB DNL and 25ppm/°C full scale drift over temperature. Outstanding AC performance includes 70dB S/(N + D) and 77dB THD at the Nyquist input frequency of 150kHz.
The internal clock is trimmed for 2.7µs maximum conversion time. The clock automatically synchronizes to each sample command eliminating problems with asynchronous clock noise found in competitive devices. A high speed parallel interface eases 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 |
|---|---|---|---|---|---|
| LTC1275ACN#PBF | N-24 | N | C | 05-08-1510 (N24) | Yes |
| LTC1275ACSW#PBF | SW-24 | SW | C | 05-08-1620 (SW24) | Yes |
| LTC1275ACSW#TRPBF | SW-24 | SW | C | 05-08-1620 (SW24) | Yes |
| LTC1275BCN#PBF | N-24 | N | C | 05-08-1510 (N24) | Yes |
| LTC1275BCSW#PBF | SW-24 | SW | C | 05-08-1620 (SW24) | Yes |
| LTC1275BCSW#TRPBF | SW-24 | SW | C | 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 | |
|---|---|---|---|---|---|---|
| LTC1275ACN#PBF | N-24 | C | $21.80 | $17.25 | Yes | |
| LTC1275ACSW#PBF | SW-24 | C | $22.65 | $17.90 | Yes | |
| LTC1275ACSW#TRPBF | SW-24 | C | $18.00 | Yes | ||
| LTC1275BCN#PBF | N-24 | C | $14.65 | $11.60 | Yes | |
| LTC1275BCSW#PBF | SW-24 | C | $16.15 | $12.75 | Yes | |
| LTC1275BCSW#TRPBF | SW-24 | C | $12.85 | 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.
