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AD7995:  4-CHANNEL, 10-BIT ADC WITH I2C COMPATIBLE INTERFACE IN 8-LEAD SOT-23

The AD7991/AD7995/AD7999 are 12-/10-/8-bit, low power, successive approximation ADCs with an I2C®-compatible interface. Each part operates from a single 2.7 V to 5.5 V power supply and features a 1 μs conversion time. The track-and-hold amplifier allows each part to handle input frequencies of up to 14 MHz, and a multiplexer allows taking samples from four channels.

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AD7995:  4-CHANNEL, 10-BIT ADC WITH I2C COMPATIBLE INTERFACE IN 8-LEAD SOT-23

Product Description

The AD7991/AD7995/AD7999 are 12-/10-/8-bit, low power, successive approximation ADCs with an I2C®-compatible interface. Each part operates from a single 2.7 V to 5.5 V power supply and features a 1 μs conversion time. The track-and-hold amplifier allows each part to handle input frequencies of up to 14 MHz, and a multiplexer allows taking samples from four channels.

Each AD7991/AD7995/AD7999 provides a 2-wire serial interface compatible with I2C interfaces. The AD7991 and AD7995 come in two versions and each version has an individual I2C address (see Table 8 of data sheet for address and part number selection). This allows two of the same devices to be connected to the same I2C bus. Both versions support standard, fast, and high speed I2C interface modes. The AD7999 comes in one version.

The AD7991/AD7995/AD7999 normally remain in a shutdown state, powering up only for conversions. The conversion process is controlled by a command mode, during which each I2C read operation initiates a conversion and returns the result over the I2C bus.

When four channels are used as analog inputs, the reference for the part is taken from VDD; this allows the widest dynamic input range to the ADC. Therefore, the analog input range to the ADC is 0 V to VDD. An external reference, applied through the VIN3/VREF input, can also be used with this part.

Product Highlights

  1. Four single-ended analog input channels, or three single-ended analog input channels and one reference input channel.
  2. I2C compatible serial Interface. Standard, Fast and Hs-Modes
  3. Automatic shutdown.
  4. Reference derived from the power supply or external reference.
  5. 8-lead SOT23 and 8 lead MSOP Packages.

Applications

  • System Monitoring
  • Battery Powered Systems
  • Data Acquisition
  • Medical Instruments

    • Data Sheet, Rev. 0, 12/07

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    EVALUATION BOARDS & DEVELOPMENT KITS

    • 12-/10-/8-bit ADC with fast conversion time: 1 μs typical
    • 4 analog input channels/3 analog input channels with reference input
    • Specified for VDD of 2.7 V to 5.5 V
    • Sequencer operation
    • Temperature Range: -40 °C to 125 °C
    • I2C ®-compatible serial interface supports standard, fast, and High-speed modes
    • 2 versions allow 2 I2C addresses
      (See Table 8 of data sheet for address and part number selection)
    • Low power consumption Shutdown mode: 1 μA max
    • 8-lead SOT-23 package
    • Resolution (Bits): 10bit
    • T-Put Rate: 140kSPS
    • # Chan: 4
    • Supply V: Single(+2.7 to +5.5)
    • Pwr Diss: 4.4mW
    • Interface: I²C/Ser 2-Wire
    • Ain Range: (Vref) p-p,Uni (Vref),Uni Vdd
    • SNR (dB): n/a
    • Pkg Type: SOT

    Functional Block Diagram for AD7995

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    Pricing, Packaging & Availability

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    For detailed drawings and chemical composition please consult our  Package Site

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    • Commercial: 0 to +70 degrees Celsius
    • Military : -55 to +125 degrees Celsius
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    • Automotive: -40 to +125 degrees Celsius
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    Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

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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.