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AD6645:  14-Bit, 80 MSPS/105 MSPS A/D Converter

The AD6645 is a high speed, high performance, monolithic 14-bit analog-to-digital converter. All necessary functions, including track-and-hold (T/H) and reference, are included on the chip to provide a complete conversion solution. The AD6645 provides CMOS-compatible digital outputs. It is the fourth generation in a wideband ADC family, preceded by the More

AD6645:  14-Bit, 80 MSPS/105 MSPS A/D Converter

Product Description

The AD6645 is a high speed, high performance, monolithic 14-bit analog-to-digital converter. All necessary functions, including track-and-hold (T/H) and reference, are included on the chip to provide a complete conversion solution. The AD6645 provides CMOS-compatible digital outputs. It is the fourth generation in a wideband ADC family, preceded by the AD9042 (12-bit, 41 MSPS), the AD6640 (12-bit, 65 MSPS, IF sampling), and the AD6644 (14-bit, 40 MSPS/65 MSPS).

Designed for multichannel, multimode receivers, the AD6645 is part of Analog Devices, Inc. SoftCell® transceiver chipset. The AD6645 maintains 100 dB multitone, spurious-free dynamic range (SFDR) through the second Nyquist band. This breakthrough performance eases the burden placed on multimode digital receivers (software radios) that are typically limited by the ADC. Noise performance is exceptional; typical signal-to-noise ratio is 74.5 dB through the first Nyquist band.

The AD6645 is built on Analog Devices’ extra fast complementary bipolar (XFCB) process and uses an innovative, multipass circuit architecture. Units are available in a thermally enhanced 52-lead PowerQuad 4 (LQFP_PQ4) package specified from −40°C to +85°C at 80 MSPS and −10°C to +85°C at 105 MSPS.

Product Highlights

  • IF Sampling. The AD6645 maintains outstanding ac performance up to input frequencies of 200 MHz, suitable for multicarrier 3G wideband cellular IF sampling receivers.
  • Pin Compatibility. The ADC has the same footprint and pin layout as the AD6644 14-bit, 40 MSPS/65 MSPS ADC.
  • SFDR Performance and Oversampling. Multitone SFDR performance of 100 dBFS can reduce the requirements of high end RF components and allows the use of receive signal processors such as the AD6620, AD6624/AD6624A, or AD6636.

    • Applications

  • Multichannel, multimode receivers
  • Base station infrastructure
  • AMPS, IS-136, CDMA, GSM, WCDMA
  • Single channel digital receivers
  • Antenna array processing
  • Communications instrumentation
  • Radar, infrared imaging
  • Instrumentation

    • Data Sheet, Rev. D, 10/08

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    • SNR = 75 dB, fIN 15 MHz, up to 105 MSPS
    • SNR = 72 dB, fIN200 MHz, up to 105 MSPS
    • SFDR = 89 dBc, fIN 70 MHz, up to 105 MSPS
    • 100 dBFS multitone SFDR
    • IF sampling to 200 MHz
    • Sampling jitter 0.1 ps
    • 1.5 W power dissipation
    • Differential analog inputs
    • Pin compatible to AD6644
    • Twos complement digital output format
    • 3.3 V CMOS compatible
    • DataReady for output latching
    • Resolution (Bits): 14bit
    • T-Put Rate: 105MSPS
    • # Chan: 1
    • Supply V: Multi(+3.3, +5)
    • Pwr Diss: 1.5W
    • Interface: Par
    • Ain Range: 2.2 V p-p
    • SNR (dB): 75dB
    • Pkg Type: QFP

    Functional Block Diagram for AD6645

    Circuits from the Lab

    Find more at our Circuits Library.

    Of Note ...

    To drive this ADC in DC-coupled applications, we suggest ADA4937-1 or ADA4938-1. To drive this ADC in AC-coupled applications, we suggest AD8352 or AD8375.

    Similar Products

    arrow View Full Interactive Product Selection Table
    Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
    AD6645-105 14 105MSPS 1 1.5W
    AD9246-105 14 105MSPS 1 373mW
    AD9246-125 14 125MSPS 1 458mW
    AD9246-80 14 105MSPS 1 288mW
    AD9254 14 150MSPS 1 470mW
    AD9640-105 14 105MSPS 2 730mW
    AD9640-125 14 125MSPS 2 910mW
    AD9640-150 14 150MSPS 2 1W
    AD9230-170 12 170MSPS 1 349mW
    AD9230-250 12 250MSPS 1 434mW
    AD9626-170 12 170MSPS 1 291mW
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    *The USA 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. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.