LTC2256-12 - 12-Bit, 25Msps Ultralow Power 1.8V ADCs

The LTC®2258-12/LTC2257-12/LTC2256-12 are 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 71.1dB SNR and 88dB spurious free dynamic range (SFDR). Ultralow jitter of 0.17psRMS allows undersampling of IF frequencies with excellent noise performance.

DC specs include ±0.3LSB INL (typical), ±0.1LSB DNL (typical) and no missing codes over temperature. The transition noise is a low 0.3LSBRMS.

The digital outputs can be either full rate CMOS, double data rate CMOS, or double data rate LVDS. A separate output power supply allows the CMOS output swing to range from 1.2V to 1.8V.

The ENC+ and ENC– inputs may be driven differentially or single-ended 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.

Features
  • 71.1dB SNR
  • 88dB SFDR
  • Low Power: 79mW/47mW/34mW
  • Single 1.8V Supply
  • CMOS, DDR CMOS or DDR LVDS Outputs
  • Selectable Input Ranges: 1VP-P to 2VP-P
  • 800MHz Full-Power Bandwidth S/H
  • Optional Data Output Randomizer
  • Optional Clock Duty Cycle Stabilizer
  • 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

Applications
  • Communications
  • Cellular Base Stations
  • Software Defined Radios
  • Portable Medical Imaging
  • Multi-Channel Data Acquisition
  • Nondestructive Testing
Packaging


Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC2256CUJ-12#PBF6x6 QFN-40C$13.57$9.50
LTC2256CUJ-12#TRPBF6x6 QFN-40C$9.56
LTC2256IUJ-12#PBF6x6 QFN-40I$16.29$11.40
LTC2256IUJ-12#TRPBF6x6 QFN-40I$11.46
Demo Boards
Part NumberDescriptionPrice
DC1369A-LLTC2256-12: 12-bit 25Msps ADC, LVDS Outputs, 5-170MHz, req DC890, LVDS_XFMR and DC1075$200.00
DC1370A-LLTC2256-12: 12-bit 25Msps ADC, CMOS Outputs, 5-170MHz, req DC890 and DC1075$200.00
Companion Boards
Part NumberDescriptionPrice
DC1075AClock Divider board$50.00
DC890BUSB Data Acquisition Controller, for PScope Evaluation Kits (up to 250Mbps, CMOS/LVDS)$300.00
Datasheet
Reliability Data
Product Selector Card
Software and Simulation
Related Product
LTC2258-12/LTC2257-12/LTC2256-12 - 12-Bit, 65/40/25Msps Ultralow Power 1.8V ADCs
LTC2258-12 Package Drawing LTC2258-12
LTC2258-12 Package Drawing LTC2258-12
R538 - Reliability Data
14-/12-Bit 1.8V Single ADCs
14-Bit/12-Bit 125Msps Quad/Dual ADC Family
High Speed Amplifiers/ADC Drivers
LTC2261Series - IBIS Model
LTC2256-12 Footprints and Symbols