LTC1749 - 12-Bit, 80Msps Wide Bandwidth ADC
Features
- Sample Rate: 80Msps
- PGA Front End (2.25VP-P or 1.35VP-P Input Range)
- 71.8dB SNR and 87dB SFDR (PGA = 0)
- 70.2dB SNR and 87dB SFDR (PGA = 1)
- 500MHz Full Power Bandwidth S/H
- No Missing Codes
- Single 5V Supply
- Power Dissipation: 1.45W
- Two Pin Selectable Reference Values
- Data Ready Output Clock
- Pin Compatible 14-Bit 80Msps Device (LTC1750)
- 48-Pin TSSOP Package
Typical Application
Description
The LTC1749 is an 80Msps, 12-bit A/D converter designed for digitizing wide dynamic range signals up to frequencies of 500MHz. The input range of the ADC can be optimized with the on-chip PGA sample-and-hold circuit and flexible reference circuitry.
The LTC1749 has a highly linear sample-and-hold circuit with a bandwidth of 500MHz. The SFDR is 80dB with an input frequency of 250MHz. Ultralow jitter of 0.15psRMS allows undersampling of IF frequencies with minimal degradation in SNR. DC specs include ±1LSB INL and no missing codes.
The digital interface is compatible with 5V, 3V, 2V and LVDS logic systems. The ENC and ENC inputs may be driven differentially from PECL, GTL and other low swing logic families or from single-ended TTL or CMOS. The low noise, high gain ENC and ENC inputs may also be driven by a sinusoidal signal without degrading performance. A separate output power supply can be operated from 0.5V to 5V, making it easy to connect directly to low voltage DSPs or FIFOs.
The 48-pin TSSOP package with a flow-through pinout simplifies the board layout.
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 |
|---|---|---|---|---|---|
| LTC1749CFW#PBF | TSSOP-48 | FW | C | 05-08-1651 | Yes |
| LTC1749CFW#TRPBF | TSSOP-48 | FW | C | 05-08-1651 | Yes |
| LTC1749IFW#PBF | TSSOP-48 | FW | I | 05-08-1651 | Yes |
| LTC1749IFW#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 | |
|---|---|---|---|---|---|---|
| LTC1749CFW#PBF | TSSOP-48 | C | $25.55 | $19.55 | Yes | |
| LTC1749CFW#TRPBF | TSSOP-48 | C | $19.65 | Yes | ||
| LTC1749IFW#PBF | TSSOP-48 | I | $30.10 | $23.00 | Yes | |
| LTC1749IFW#TRPBF | TSSOP-48 | I | $23.10 | 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 |
|---|---|---|---|
| DC699A-A | LTC1749CFW Demoboard | 12-Bit 80MSPS ADC, Requires DC718 | $200.00 | |
| Buy Now | |||
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC718C | USB Data Acquisition Controller, for PScope Evaluation Kits (<135Mbps) | $300.00 | |
| Buy Now | |||
Applications
- Direct IF Sampling
- Telecommunications
- Receivers
- Cellular Base Stations
- Spectrum Analysis
- Communications Test Equipment
- Undersampling
People Who Viewed This Product Also Viewed
- LTC1747 - 12-Bit, 80Msps Low Noise ADC
- LTC1750 - 14-Bit, 80Msps Wide Bandwidth ADC
- LTC1748 - 14-Bit, 80Msps Low Noise ADC
- LTC1741 - 12-Bit, 65Msps Low Noise ADC
- LTC1743 - 12-Bit, 50Msps ADC
- LTC6409 - 10GHz GBW, 1.1nV/√Hz Differential Amplifier/ADC Driver
- LT5400 - Quad Matched Resistor Network
- LTC1744 - 14-Bit, 50Msps ADC
- LTC1742 - 14-Bit, 65Msps Low Noise ADC
- LTC1406 - Low Power, 8-Bit, 20Msps, Sampling A/D Converter
Product Notifications
Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.
Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.
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.
