AD9445:  14-Bit, 105 MSPS / 125 MSPS A/D Converter

The AD9445 is a 14-bit monolithic, sampling analog-to-digital converter (ADC) with an on-chip, IF sampling track-and-hold circuit and is optimized for power, small size, and ease of use. The product ...More

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

AD9445:  14-Bit, 105 MSPS / 125 MSPS A/D Converter

Product Description

The AD9445 is a 14-bit monolithic, sampling analog-to-digital converter (ADC) with an on-chip, IF sampling track-and-hold circuit and is optimized for power, small size, and ease of use. The product operates at up to an 105 MSPS conversion rate and is optimized for multi-carrier, multimode receivers, such as those found in cellular infrastructure equipment.

The ADC requires 3.3 V and 5.0 V power supplies and a low voltage differential input clock for full performance operation. No external reference or driver components are required for many applications. Data outputs are LVDS-compatible (ANSI-644) or CMOS-compatible and include the means to reduce the overall current needed for short trace distances.

Optional features allow users to implement various selectable operating conditions, including data format select and output data mode.

The AD9445 is available in a 100-lead surface-mount plastic package (100-lead TQFP/EP) specified over the industrial temperature range (−40°C to +85°C).

Product Highlights
1. High performance: Outstanding SFDR performance for multicarrier, multimode 3G and 4G cellular base station receivers.
2. Ease of use: On-chip reference and track-and-hold. An output clock simplifies data capture.
3. Packaged in a Pb-free, 100-lead TQFP/EP.
4. Clock duty cycle stabilizer (DCS) maintains overall ADC performance over a wide range of clock pulse widths.
5. OR (out-of-range) outputs indicate when the signal is beyond the selected input range.

Applications

  • Multi-carrier, multimode cellular receivers
  • Antenna array positioning
  • Power amplifier linearization
  • Broadband wireless
  • Radar, infrared imaging
  • Medical Imaging
  • Communications instrumentation

    • Features

    • 125 MSPS guaranteed sampling rate (AD9445BSV-125)
    • 100 dB two-tone SFDR with 30 MHz and
      31 MHz
    • 73.5 dB SNR with 70 MHz input
    • 85 dBc SFDR with 225 MHz input
    • Excellent linearity
      DNL = ±0.25 LSB typical
      INL = ±0.8 LSB typical
    • 2.3 W power dissipation
    • 3.3 V and 5 V supply operation
    • 2.0 V p-p to 3.2 V p-p differential full-scale input
    • LVDS outputs (ANSI-644 compatible) or CMOS outputs
    • Data format select (Offset Binary or 2’s compliment)
    • Output clock available

    Verified Circuits Using This Part

    Verified Circuits are designed for ease of use and proven to work by ADI applications engineers. To learn more about Verified Circuits from ADI, please visit Verified Circuits Home.

    Circuit Diagram

    Diagrams

    AD9445 Diagram
    Functional Block Diagram for AD9445

    Specifications

    Resolution (Bits) 14bit
    T-Put Rate 125MSPS
    # Chan 1
    Supply V Multi(+3.3, +5)
    Pwr Diss (max) 2.6W
    Interface Par
    Ain Range (2Vref) p-p,2 V p-p,3.2 V p-p
    SNR (dB) 77.6dB
    Pkg Type QFP

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    Part# Res Throughput Rate # of Inputs Operating Pwr Diss
    AD9246-125 14 125MSPS 1 458mW
    AD9254 14 150MSPS 1 470mW
    AD9445-125 14 125MSPS 1 2.6W
    AD9640-150 14 150MSPS 2 938mW
    AD9261-10 16 160MSPS 1 473mW
    AD9230-170 12 170MSPS 1 407mW