National Semiconductor | High-performance Analog

 

 ADC121C021   

I2C-Compatible, 12-Bit Analog-to-Digital Converter with Alert Pin from the PowerWise® Family
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Features

  • I 2C-Compatible 2-wire Interface which supports standard (100kHz), fast (400kHz), and high speed (3.4MHz) modes
  • Extended power supply range (+2.7V to +5.5V)
  • Up to nine pin-selectable chip addresses (MSOP-8 only)
  • Out-of-range Alert Function
  • Automatic Power-down mode while not converting
  • Very small TSOT-6 and MSOP-8 packages
  • ±8kV HBM ESD protection (SDA, SCL)
  • Description

    These converters are low-power, monolithic, 12-bit, analog-to-digital converters (ADCs) that operates from a +2.7 to 5.5V supply. The converter is based upon a successive approximation register architecture with an internal track-and-hold circuit that can handle input frequencies up to 11MHz. These converters operate from a single supply which also serves as the reference. The device features an I 2C-compatible serial interface that operates in all three speed modes, including high speed mode (3.4MHz).

    The ADC121C021's Alert feature provides an interrupt that is activated when the analog input violates a programmable upper or lower limit value. The device features an automatic conversion mode, which frees up the controller and I 2C interface. In this mode, the ADC continuously monitors the analog input for an "out-of-range" condition and provides an interrupt if the measured voltage goes out-of-range.

    The ADC121C021 comes in two packages: a small TSOT-6 package with an alert output, and an MSOP-8 package with an alert output and two address selection inputs. The ADC121C027 comes in a small TSOT-6 package with an address selection input. The ADC121C027 provides three pin-selectable addresses while the MSOP-8 version of the ADC121C021 provides nine pin-selectable addresses. Pin-compatible alternatives to the TSOT-6 options are available with additional address options.

    Normal power consumption using a +3V or +5V supply is 0.26mW or 0.78mW, respectively. The automatic power-down feature reduces the power consumption to less than 1µW while not converting. Operation over the industrial temperature range of −40°C to +105°C is guaranteed. Their low power consumption and small packages make this family of ADCs an excellent choice for use in battery operated equipment.

    The ADC121C021 and ADC121C027 are part of a family of pin-compatible ADCs that also provide 8 and 10 bit resolution. For 8-bit ADCs see the ADC081C021 and ADC081C027. For 10-bit ADCs see the ADC101C021 and ADC101C027.

    Key Specification

    Resolution

    12 bits; no missing codes

    Conversion Time

    1µs (typ)

    INL & DNL

    ±1 LSB (max) (up to 22ksps)

    Throughput Rate

    188.9ksps (max)

    Power Consumption (at 22ksps)

    3V Supply

    0.26 mW (typ)

    5V Supply

    0.78 mW (typ)


    Applications

  • System Monitoring
  • Peak Detection
  • Portable Instruments
  • Medical Instruments
  • Test Equipment


  • Typical Application Circuit

     

    ParametersValues
    Pin and Function Compatible Family 1 ch, SOT-6
    Resolution 12 bits
    Input Channels 1
    Sample Rate Range (sps) 5.5k - 189ksps
    Interface Type I2C
    Differential Input No
    Power Down, typ. at 3.6V 0.5 uW
    Operating Power, typ at 3.6V, max ksps 0.007 mW
    Operating Power, 3.6V, 1ksps, max. PwrDn 1.2 mW
    PowerWise Rating 1 2.56 pJ/conv
    INL (LSB) ±1.0
    DNL (LSB) ± 1.0
    ENOB 11.3 bits
    SINAD 70 dB
    SNR 70.4 dB
    Max KSample Rate 189 ksps
    Min Supply Voltage 2.7 Volt
    Max Supply Voltage 5.5 Volt
    Reference Source Supply
    Temperature Min -40 deg C
    Temperature Max 105 deg C
    Power Down Yes
    Input Sample/Hold Yes
    Special Features Alert function
    Data Converter Type ADC
    Max Sample Rate 0.189 MSPS
    PowerWise Yes

    Datasheets
    TitleSizeDateOther
    Language
    ADC121C021 I2C-Compatible, 12-Bit Analog-to-Digital Converter with Alert Pin804
    Kbytes
    27-Jul-10   

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    ADC121C021CIMK/NOPB

    ADC121C021CIMK

    RoHS Status


    TSOT
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1000
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide4220
    FARNELLEurope and Asia1612
    MOUSERWorldwide893
    RS COMPONENTSWorldwide65
    TAYLORAmericas1000
    $1.16 each at 1K+ pcsreel
    of
    1000
    ADC121C021CIMKX/NOPB


    RoHS Status


    TSOT
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.16 each at 1K+ pcsreel
    of
    3000
    ADC121C021CIMM/NOPB


    RoHS Status


    MINI SOIC
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide2000
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide1522
    FARNELLEurope and Asia239
    MOUSERWorldwide800
    NEWARKAmericas239
    TAYLORAmericas2000
    $1.16 each at 1K+ pcsreel
    of
    1000
    ADC121C021CIMMX/NOPB


    RoHS Status


    MINI SOIC
    Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.16 each at 1K+ pcsreel
    of
    3500

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for ADC121C021.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for ADC121C021 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    ADC121C02XEB/NOPB

    I2C-Compatible, 12-Bit Analog-to-Digital Converter (ADC) with Alert Function Evaluation BoardFull production
    Lead Free (RoHS)

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    FARNELLEurope and Asia3
    MOUSERWorldwide1
    NEWARKAmericas3
    $120.00 each1

    Description:

    The ADC121C02XEB evaluation board is designed to ease evaluation and design-in of National Semiconductor`s ADC121C021/ADC121C027 family of Analog-to-Digital Converters. The ADCs can operate at speeds up to 188.9 kSPS. The converter features an I2C interface and an Alert function. The LMP7731 Low-noise, Precision Operational Amplifier is included on the ADC121C02XEB for convenient buffering of the analog input. The ADC121C02XEB evaluation board may be used in the Stand Alone mode to capture data with a logic analyzer or third party equipment, or it may be used in the Computer Mode with a WaveVision 4 Data Capture Board (Rev4.1 or later).

    Features:

    • I2C-Compatible 2-wire Interface which supports standard (100kHz), fast (400kHz), and high speed (3.4MHz) modes
    • Extended power supply range (+2.7V to +5.5V)
    • Up to four pin-selectable chip addresses
    • Out-of-range Alert Function
    • Automatic Power-down mode while not converting
    • Very small 6-pin TSOT packages
    • ±8kV HBM ESD protection (SDA, SCL)

    Contents:




    National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

    Lead Free product status is available through the search tool located here

    Part Number(s)
    (NSID)
    Weight
    (milligrams)
    TypePinsMSL RatingPeak ReflowRoHS
    Status
    CAD SymbolsModelsPackage
    Marking
    Format
    ADC121C021CIMK/NOPB

    ADC121C021CIMK
    13.726
    13.851
    TSOT61
    1
    260
    260
    DetailDownloadN/A
    X30C
    XTT
    ADC121C021CIMKX/NOPB

    13.726
    TSOT61260DetailDownloadN/A
    X30C
    XTT
    ADC121C021CIMM/NOPB

    29.851
    MINI SOIC81260DetailDownloadN/A
    ZXTT
    X37C
    ADC121C021CIMMX/NOPB

    29.851
    MINI SOIC81260DetailDownloadN/A
    ZXTT
    X37C

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for ADC121C021.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for ADC121C021 is located at RoHS Status.

    CAD Symbols and Models
    Download ADC121C021 CAD Symbols
     Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    ADC121C021CIMKCMOS70213010015840003449464325
    ADC121C021CIMKXCMOS70213010015840003449464325
    ADC121C021CIMMCMOS70213010015840003449464325
    ADC121C021CIMMXCMOS70213010015840003449464325

    Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

    For more information on Reliability Metrics, please click here.


    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for ADC121C021.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for ADC121C021 is located at RoHS Status.

    Data Acquisition In Factory Automation
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    Factory Automation Overview
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    Sensing Solutions In Factory Automation
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    Data Acquisition In Factory Automation
    Date: 2009-08-24
    Length: 0:31:29
    Factory Automation Overview
    Date: 2009-08-04
    Length: 0:32:30
    Sensing Solutions In Factory Automation
    Date: 2009-07-10
    Length: 0:50:00
    [Information as of 9-Feb-2012]