LTC1748 - 14-Bit, 80Msps Low Noise ADC
Features
- Sample Rate: 80Msps
- 76.3dB SNR and 90dB SFDR (3.2V Range)
- 72.6dB SNR and 90dB SFDR (2V Range)
- No Missing Codes
- Single 5V Supply
- Power Dissipation: 1.4W
- Selectable Input Ranges: ±1V or ±1.6V
- 240MHz Full Power Bandwidth S/H
- Pin Compatible Family
25Msps: LTC1746 (14-Bit), LTC1745 (12-Bit)
50Msps: LTC1744 (14-Bit), LTC1743 (12-Bit)
65Msps: LTC1742 (14-Bit), LTC1741 (12-Bit)
80Msps: LTC1748 (14-Bit), LTC1747 (12-Bit) - 48-Pin TSSOP Package
AEC-Q100 data available for specific packages
Typical Application
Description
The LTC1748 is an 80Msps, sampling 14-bit A/D converter designed for digitizing high frequency, wide dynamic range signals. Pin selectable input ranges of ±1V and ±1.6V along with a resistor programmable mode allow the LTC1748’s input range to be optimized for a wide variety of applications.
The LTC1748 is perfect for demanding communications applications with AC performance that includes 76.3dB SNR and 90dB spurious free dynamic range. Ultralow jitter of 0.15psRMS allows undersampling of IF frequencies with excellent noise performance. DC specs include ±3LSB 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 any low voltage DSPs or FIFOs.
The 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 |
|---|---|---|---|---|---|
| LTC1748CFW#PBF | TSSOP-48 | FW | C | 05-08-1651 | Yes |
| LTC1748CFW#TRPBF | TSSOP-48 | FW | C | 05-08-1651 | Yes |
| LTC1748IFW#PBF | TSSOP-48 | FW | I | 05-08-1651 | Yes |
| LTC1748IFW#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 | |
|---|---|---|---|---|---|---|
| LTC1748CFW#PBF | TSSOP-48 | C | $42.25 | $32.30 | Yes | |
| LTC1748CFW#TRPBF | TSSOP-48 | C | $32.40 | Yes | ||
| LTC1748IFW#PBF | TSSOP-48 | I | $49.70 | $38.00 | Yes | |
| LTC1748IFW#TRPBF | TSSOP-48 | I | $38.10 | 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 |
|---|---|---|---|
| DC520B-A | LTC1748CFW | 14-Bit / 80 Msps Low Noise ADC, Ain < 40MHz (requires DC718 controller) | $100.00 | |
| DC520B-B | LTC1748CFW | 14-Bit / 80 Msps Low Noise ADC, Ain > 40MHz (requires DC718 controller) | $100.00 | |
| Buy Now | |||
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC718C | USB Data Acquisition Controller, for PScope Evaluation Kits (<135Mbps) | $300.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC1748IFW#PBF | TSSOP-48 | I | $49.70 | $38.00 | Yes | |
| LTC1748IFW#TRPBF | TSSOP-48 | I | $38.10 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- Telecommunications
- Receivers
- Cellular Base Stations
- Spectrum Analysis
- Imaging Systems
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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.
