AD9237:  12-Bit, 20/40/65 MSPS 3 V Low Power A/D Converter

The AD9237 is a monolithic, single 3 V supply, 12-bit, 20/40/65 MSPS Analog to Digital Converter with a high performance sample-and-hold amplifier and voltage reference. The AD9237 uses a ...More

To drive this ADC in DC-coupled applications, we suggest ADA4938-1. To drive this ADC in AC-coupled applications, we suggest AD8351.

AD9237:  12-Bit, 20/40/65 MSPS 3 V Low Power A/D Converter

Product Description

The AD9237 is a monolithic, single 3 V supply, 12-bit, 20/40/65 MSPS Analog to Digital Converter with a high performance sample-and-hold amplifier and voltage reference. The AD9237 uses a multistage differential pipelined architecture with output error correction logic to provide 12-bit accuracy at 20/40/65 MSPS data rates and guarantee no missing codes over the full operating temperature range.

The wide bandwidth, truly differential SHA allows for a variety of user-selectable input ranges and offsets including single-ended applications. It is suitable for multiplexed systems that switch full-scale voltage levels in successive channels and for sampling single-channel inputs at frequencies well beyond the Nyquist rate. With significant power savings over previously available analog to digital converters, the AD9237 is suitable for applications imaging and medical ultrasound.

A single-ended clock input is used to control all internal conversion cycles. The digital output data is presented in straight binary, twos complement, or gray code formats. An out-of-range (OTR) signal indicates an overflow condition, which can be used with the most significant bit to determine low or high overflow.

Fabricated on an advanced CMOS process, the AD9237 is available in a 32-pin chip scale package and is specified over the industrial temperature range (-40°C to +85°C).

Product Highlights
1. Operating at 65 MSPS, the AD9237 consumes a low 190 mW and only consumes 135 mW at 40 MSPS and 90 mW at 20 MSPS.
2. The AD9237 operates from a single 3V power supply, and features a separate digital output driver supply to accommodate 2.5V and 3.3V logic families.
3. The patented SHA input maintains excellent performance for input frequencies beyond Nyquist, and can be configured for single-ended or differential operation.
4. The AD9237 is pin compatible to the AD9235, a 12-bit, 20/40/65 MSPS A/D converter. This allows a simplified path for low power 12-bit systems.
5. The AD9237 is optimized for selectable and flexible input ranges from 4 Vp-p to 1 Vp-p.
6. Output Enable pin to allow for multiplexing of the outputs.
7. Two-step power down supports a standby mode in addition to a power down mode.
8. The OTR output bit indicates when the signal is beyond the selected input range.

Applications

  • Ultrasound and Medical Imaging
  • Battery Powered Instruments
  • Hand-Held Scopemeters
  • Low Cost Digital Oscilloscopes
  • Low Power Digital Still Cameras and Copiers
  • Low power communications

    • Features

    • Ultra Low Power
      85mW@20MSPS
      135mW @ 40MSPS
      190mW @ 65MSPS
    • SNR = 66.5 dBc (to Nyquist)
    • SFDR = 85 dBc @ 2.4MHz Analog Input
    • ENOB = 10.6 bits
    • DNL= ±0.7 LSB
    • Differential Input with 500 MHz Full Power Bandwidth
    • Flexible and Selectable Analog Input: 4Vp-p to 1Vp-p
    • Data Formats Supported; Offset Binary, Twos Complement and Gray Code
    • Output Enable Pin
    • 2-step power down; Full Power down and Sleep mode

    Diagrams

    AD9237 Diagram
    Functional Block Diagram for AD9237

    Specifications

    Resolution (Bits) 12bit
    T-Put Rate 65MSPS
    # Chan 1
    Supply V Single(+3)
    Pwr Diss 270mW
    Interface Par
    Ain Range 1 V p-p,2 V p-p,4 V p-p
    SNR (dB) 66.5dB
    Pkg Type CSP

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    Subscribe to New Products Feed More
    Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
    AD9237-65 12 65MSPS 1 270mW
    AD9214-65 10 65MSPS 1 220mW
    AD9215-105 10 105MSPS 1 145mW
    AD9215-65 10 65MSPS 1 114mW
    AD9283-100 8 100MSPS 1 120mW
    AD9626-170 12 170MSPS 1 291mW
    AD9233-105 12 105MSPS 1 350mW
    AD9235-65 12 65MSPS 1 350mW
    AD9626-250 12 250MSPS 1 390mW
    AD9230-170 12 170MSPS 1 407mW
    AD9236 12 80MSPS 1 411mW
    Pricing, Packaging & Availability

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    • Military : -55 to +125 degrees Celsius
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    • Automotive: -40 to +125 degrees Celsius
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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.

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