LTC1747 - 12-Bit, 80Msps Low Noise ADC

The LTC1747 is an 80Msps, sampling 12-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 LTC1747’s input range to be optimized for a wide variety of applications.

The LTC1747 is perfect for demanding communications applications with AC performance that includes 72dB SNR and 85dB spurious free dynamic range. Ultralow jitter of 0.15psRMS allows undersampling of IF frequencies with excellent noise performance. DC specs include ±1.5 LSB INL and ±0.8LSB DNL over temperature.

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.

Features
  • Sample Rate: 80Msps
  • 72dB SNR and 85dB SFDR (3.2V Range)
  • 70.5dB SNR and 87dB SFDR (2V Range)
  • Pin Compatible with 14-Bit 80Msps LTC1748
  • 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
Typical Application
Applications
  • Telecommunications
  • Receivers
  • Cellular Base Stations
  • Spectrum Analysis
  • Imaging Systems
Packaging
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC1747CFW#PBFTSSOP-48C$25.55$19.55
LTC1747CFW#TRPBFTSSOP-48C$19.65
LTC1747IFW#PBFTSSOP-48I$30.10$23.00
LTC1747IFW#TRPBFTSSOP-48I$23.10
Demo Boards
Part NumberDescriptionPrice
DC520B-ELTC1747CFW | 12-Bit / 80 Msps Low Noise ADC, Ain < 40MHz (requires DC718 controller)$100.00
DC520B-FLTC1747CFW | 12-Bit / 80 Msps Low Noise ADC, Ain > 40MHz (requires DC718 controller)$100.00
Companion Boards
Part NumberDescriptionPrice
DC718CUSB Data Acquisition Controller, for PScope Evaluation Kits (<135Mbps)$300.00
Datasheet
Reliability Data
Product Selector Card
Related Product
LTC1747 - 12-Bit, 80Msps Low Noise ADC
R479 Reliability Data
High Speed Amplifiers/ADC Drivers
LTC1747 Footprints and Symbols