LTC2268-12 - 12-Bit, 125Msps Low Power Dual ADCs
Features
- 2-Channel Simultaneous Sampling ADC
- 70.6dB SNR
- 88dB SFDR
- Low Power: 292mW/238mW/200mW Total, 146mW/119mW/100mW per Channel
- Single 1.8V Supply
- Serial LVDS Outputs: 1 or 2 Bits per Channel
- Selectable Input Ranges: 1VP-P to 2VP-P
- 800MHz Full Power Bandwidth S/H
- Shutdown and Nap Modes
- Serial SPI Port for Configuration
- Pin Compatible 14-Bit and 12-Bit Versions
- 40-Pin (6mm × 6mm) QFN Package
Typical Application
Description
The LTC2268-12/LTC2267-12/LTC2266-12 are 2-channel, simultaneous sampling 12-bit A/D converters designed for digitizing high frequency, wide dynamic range signals. They are perfect for demanding communications applications with AC performance that includes 70.6dB SNR and 88dB spurious free dynamic range (SFDR). Ultralow jitter of 0.15psRMS allows undersampling of IF frequencies with excellent noise performance.
DC specs include ±0.3LSB INL (typ), ±0.1LSB DNL (typ) and no missing codes over temperature. The transition noise is a low 0.3LSBRMS.
The digital outputs are serial LVDS to minimize the number of data lines. Each channel outputs two bits at a time (2-lane mode). At lower sampling rates there is a one bit per channel option (1-lane mode). The LVDS drivers have optional internal termination and adjustable output levels to ensure clean signal integrity.
The ENC+ and ENC– inputs may be driven differentially or single-ended with a sine wave, PECL, LVDS, TTL, or CMOS inputs. An internal clock duty cycle stabilizer allows high performance at full speed for a wide range of clock duty cycles.
| Bits |
|
| LTC2268-12 | 12 |
| LTC2268-14 | 14 |
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 |
|---|---|---|---|---|---|
| LTC2268CUJ-12#PBF | 6x6 QFN-40 | UJ | C | 05-08-1728 | Yes |
| LTC2268CUJ-12#TRPBF | 6x6 QFN-40 | UJ | C | 05-08-1728 | Yes |
| LTC2268IUJ-12#PBF | 6x6 QFN-40 | UJ | I | 05-08-1728 | Yes |
| LTC2268IUJ-12#TRPBF | 6x6 QFN-40 | UJ | I | 05-08-1728 | 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 | |
|---|---|---|---|---|---|---|
| LTC2268CUJ-12#PBF | 6x6 QFN-40 | C | $42.14 | $29.50 | Yes | |
| LTC2268CUJ-12#TRPBF | 6x6 QFN-40 | C | $29.56 | Yes | ||
| LTC2268IUJ-12#PBF | 6x6 QFN-40 | I | $46.36 | $32.45 | Yes | |
| LTC2268IUJ-12#TRPBF | 6x6 QFN-40 | I | $32.51 | 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 |
|---|---|---|---|
| DC1532A-G | LTC2268-12 | 12-Bit, 125Msps, 1.8V Dual Serial ADC, 5MHz < Ain < 170MHz, req DC1371 and DC1075 | $200.00 | |
| Buy Now | |||
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1075A | Clock Divider board | $50.00 | |
| DC1371B | FMC High-Speed Data Acquisition Board | $1,950.00 | |
| Buy Now | |||
Applications
- Communications
- Cellular Base Stations
- Software Defined Radios
- Portable Medical Imaging
- Multichannel Data Acquisition
- Nondestructive Testing
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Design Tools
LinearLabTools
LinearLabTools is a collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards. An evaluation board for a data converter will typically plug into an accompanying controller board, which is then connected to a host computer running a Linear supplied GUI program such as PScope for Analog-to-Digital converters or LTDACgen for Digital-to-Analog converters. The GUI allows basic performance measurements to be made, but it is not designed to run arbitrary sequences of tests or communicate with other hardware, as is often required by customers when evaluating a part for their own application. LinearLabTools allows customers to control Linear’s data converter demo boards as they would any other piece of test equipment, using their own software.
The LinearLabTools package also contains various application examples, simulations, and educational programs that demonstrate mixed signal concepts.
Click here for more information and to download the software
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.
