LTC1749

PRODUCTION

12-Bit, 80Msps Wide Bandwidth ADC

Data Sheet Product Selection Table
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Overview

  • Sample Rate: 80Msps
  • PGA Front End (2.25VP-P or 1.35VP-P Input Range)
  • 71.8dB SNR and 87dB SFDR (PGA = 0)
  • 70.2dB SNR and 87dB SFDR (PGA = 1)
  • 500MHz Full Power Bandwidth S/H
  • No Missing Codes
  • Single 5V Supply
  • Power Dissipation: 1.45W
  • Two Pin Selectable Reference Values
  • Data Ready Output Clock
  • Pin Compatible 14-Bit 80Msps Device (LTC1750)
  • 48-Pin TSSOP Package

The LTC1749 is an 80Msps, 12-bit A/D converter designed for digitizing wide dynamic range signals up to frequencies of 500MHz. The input range of the ADC can be optimized with the on-chip PGA sample-and-hold circuit and flexible reference circuitry.

The LTC1749 has a highly linear sample-and-hold circuit with a bandwidth of 500MHz. The SFDR is 80dB with an input frequency of 250MHz. Ultralow jitter of 0.15psRMS allows undersampling of IF frequencies with minimal degradation in SNR. DC specs include ±1LSB 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 low voltage DSPs or FIFOs.

The 48-pin TSSOP package with a flow-through pinout simplifies the board layout.

Applications

  • Direct IF Sampling
  • Telecommunications
  • Receivers
  • Cellular Base Stations
  • Spectrum Analysis
  • Communications Test Equipment
  • Undersampling
LTC1749
12-Bit, 80Msps Wide Bandwidth ADC
80Msps, 12-Bit ADC with a 2.25V Differential Input Range Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

Evaluation Software 2

PScope

The PScope System is a USB-based product demonstration and data acquisition system for use with high performance ADCs and signal chain receiver family. PScope allows users to evaluate the SNR, SFDR, THD, as well as other key parameters, quickly and easily.

LinearLab Tools

A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards.

Hardware Ecosystem

Parts Product Life Cycle Description
LTC2259-12
PRODUCTION 12-Bit, 80Msps Ultralow Power 1.8V ADCs
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Evaluation Kits

eval board
schematic 1
DC699A-A

LTC1749CFW Demo Board | 12-Bit 80MSPS ADC, Requires DC718

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Product Details

DC699A-A: Demo Board for the LTC1749 12-Bit, 80Msps Wide Bandwidth ADC.
DC699A-A
LTC1749CFW Demo Board | 12-Bit 80MSPS ADC, Requires DC718
DC699A-A - Schematic

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