Overview
Features and Benefits
- 68.5dB SNR
- 90dB SFDR
- Low Power: 628mW/592mW/545mW Total
- Single 1.8V Supply
- DDR LVDS Outputs
- Easy-to-Drive 1.5VP-P Input Range
- 1.25GHz Full-Power Bandwidth S/H
- Optional Clock Duty Cycle Stabilizer
- Low Power Sleep and Nap Modes
- Serial SPI Port for Configuration
- Pin Compatible 14-Bit Versions
- 64-Lead (9mm × 9mm) QFN Package
Product Details
The LTC2157-12/LTC2156-12/LTC2155-12 are a family of dual 250Msps/210Msps/170Msps 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 68.5dB SNR and 90dB spurious free dynamic range (SFDR). The 1.25GHz input bandwidth allows the ADC to achieve high undersampling ratio with very low attenuation. The latency is only five clock cycles.
DC specs include ±0.26LSB INL (typ), ±0.16LSB DNL (typ) and no missing codes over temperature. The transition noise is 0.54LSBRMS.
The digital outputs are double data rate (DDR) LVDS.
The ENC+ and ENC– inputs can be driven differentially with a sine wave, PECL, LVDS, TTL, or CMOS inputs. An optional clock duty cycle stabilizer allows high performance at full speed for a wide range of clock duty cycles.
| Bits | |
| LTC2157-12 | 12 |
| LTC2157-14 | 14 |
Applications
- Communications
- Cellular Basestations
- Software Defined Radios
- Medical Imaging
- High Definition Video
- Testing and Measurement Instruments
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
-
R538 Reliability Data3/26/2018
-
DC1564A - Demo Manual1/3/2012
Tools & Simulations
IBIS Model
IBS
LTC2157 IBIS model
44.00K
Software and Simulation
Product Recommendations
LTC2157-12 Companion Parts
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC2157CUP-12#PBF | Material Declaration | Reliability Data | 64-Lead QFN (9mm x 9mm x 0.75mm w/ EP) | |
| LTC2157CUP-12#TRPBF | Material Declaration | Reliability Data | 64-Lead QFN (9mm x 9mm x 0.75mm w/ EP) | |
| LTC2157IUP-12#PBF | Material Declaration | Reliability Data | 64-Lead QFN (9mm x 9mm x 0.75mm w/ EP) | |
| LTC2157IUP-12#TRPBF | Material Declaration | Reliability Data | 64-Lead QFN (9mm x 9mm x 0.75mm w/ EP) | |
| Wafer Fabrication Data | R538 Reliability Data |
Support & Discussions
LTC2157-12 Discussions
Sample & Buy
Ordering FAQs
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.