Microchip Technology Inc

MCP3421

In Production

The MCP3421 ADC can be used for various high accuracy analog-to-digital data conversion applications where ease of use, low power consumption and small footprint are major considerations.The MCP3421 is a single channel low-noise, high accuracy delta-sigma A/D converter with differential inputs and up to 18 bits of resolution in a small SOT-23-6 package. Please consider the MCP3425 version for resolutions up to 16 bits. The on-board precision 2.048V reference voltage enables a differential input range of ±2.048V. The device uses a two-wire I2C™ compatible interface and operates from a single power supply ranging from 2.7V to 5.5V. The MCP3421 ADC performs conversions at rates of 3.75, 15, 60 or 240 samples per second with corresponding resolutions of 18, 16, 14 and 12 bits. The onboard programmable gain amplifier (PGA) provides gain up to 8x. The device has two conversion modes: Continuous mode and One-Shot mode. In One-Shot mode, the device enters a low current standby mode automatically after a conversion, greatly reducing power use.

 

    Features

        • 18-bit resolution
        • Small 6-lead SOT-23 packaging
        • Differential input operation
        • On-board voltage reference with 5 ppm/°C drift
        • On-board PGA, gains of 1, 2, 4, 8
        • Programmable data rate options
          • 3.75 SPS (18 bits)
          • 15 SPS (16 bits)
          • 60 SPS (14 bits)
          • 240 SPS (12 bits)
        • INL 10 ppm of FSR max
        • Low current consumption, 145 µA at 3V
        • One-shot or continuous conversion options
        • Supports I2C™ serial interface
        • Extended temperature range: -40°C to +125°C
    Parameter Name
    Value
    Typical Supply Current (µA)
    155
    Typical INL (ppm)
    10
    Max Sample Rate (samples/sec)
    4
    Input Type
    1 Differential
    Interface
    I²C™
    Resolution (bits)
    18
    Supply Voltage Range (V)
    2.7 to 5.5
    Documentation
    Data Sheets
    08/10/2009
    722KB
      Application Notes
     
     
     
     
    AppNote
    01/25/2008
    318KB
      Brochures
     
     
     
    Brochures
    09/16/2014
    7598KB
    Brochures
    11/10/2012
    3229KB
    Brochures
    10/06/2014
    3370KB
      Sell Sheets
     
     
     
     
    Sell Sheets
    05/16/2011
    120KB
      Product Selection Tools
     
     
     
     
    Product Line Card
    06/08/2017
    4167KB
      User Guides
     
     
     
    User Guides
    02/03/2009
    584KB
    User Guides
    01/22/2010
    372KB
    Pricing & Samples
    All pricing shown in USD only.
    Part Number
    Leads
    Package Type
    Temp Range
    Packing
    1+
    26+
    100+
    1000+
    5000+
    Buy
    Sample
    MCP3421A0T-E/CH
    6
    SOT-23
    -40C to +125C
    T/R
    2.39
    1.99
    1.81
    1.75
    1.73
    MCP3421A1T-E/CH
    6
    SOT-23
    -40C to +125C
    T/R
    2.39
    1.99
    1.81
    1.75
    1.73
     
    MCP3421A2T-E/CH
    6
    SOT-23
    -40C to +125C
    T/R
    2.39
    1.99
    1.81
    1.75
    1.73
     
    MCP3421A3T-E/CH
    6
    SOT-23
    -40C to +125C
    T/R
    2.39
    1.99
    1.81
    1.75
    1.73
     

    ** Device not available to purchase online. Please contact a sales office for pricing information.
    Open a microchipDIRECT account today!

    Development Tools
    • Demo & Eval Boards
    • MCP3421 Battery Fuel Gauge Demo Board ( MCP3421DM-BFG )

      MCP3421

      The MCP3421 Battery Fuel Gauge Demo Board demonstrates how to measure the battery voltage and discharging current using the MCP3421.

      The MCU algorithm calculates the battery fuel being used. This demo board is shipped with 1.5V AAA non-rechargeable battery. The demo board displays the following parameters:

      • MCP3421 Weight Scale Demo Board ( MCP3421DM-WS )

        MCP3421

        The MCP3421 Weight Scale Demo Board is designed to evaluate the performance of the low-power consumption, 18-bit ADC in an electronic weight scale design. Next to the MCP3421 there is a low-noise, auto-zero MCP6V07 op amp. This can be used to investigate the impact of extra gain added before the ADC for performance improvement. The PIC18F4550 is controlling the LCD and the USB communication with...

      • MCP3421 SOT23-6 Eval Board ( MCP3421EV )

        MCP3421

        The MCP3421 SOT23-6 Evaluation Board (P/N MCP3421EV) contains a MCP3421 18-bit Delta-Sigma Analog-to-Digital Converter (ADC). The MCP3421 is an 18-bit single channel ADC device with various options. The MCP3421 SOT23-6 Evaluation Board has analog input connection pads and VDD, SDA, and SCL test pads. The user can connect any sensor input signal to this evaluation board and test the ADC conversion...

      • Thermocouple Reference Design Board ( TMPSNSRD-TCPL1 )

        Thermocouple

        The Thermocouple Reference Design demonstrates how to instrument a Thermocouple and accurately sense temperature over the entire Thermocouple measurement range. This solution uses the MCP3421 18-Bit Analog-to-Digital Converter (ADC) to measure voltage across the Thermocouple.

    Similar Devices
    Product
    Resolution (bits)
    Max Sample Rate
    Input type
    Price5K
    18
    4
    1 Differential
    $1.99
    18
    4
    2 Differential
    $2.08
    18
    4
    2 Differential
    $2.25
    18
    4
    4 Differential
    $2.83
    16
    15
    1 Differential
    $1.57
    16
    15
    2 Differential
    $1.89
    16
    15
    2 Differential
    $2.04
    16
    15
    4 Differential
    $2.57
    22
    13
    1 Differential
    $2.84
    22
    15
    1 Differential
    $2.84
    22
    14
    1 Differential
    $2.84
    22
    60
    1 Differential
    $2.84
    RoHS Information
    Part
    Number
    Device
    Weight
    Shipping
    Weight
    Lead
    Count
    Package
    Type
    Package
    Width
    Solder
    Composition
    JEDEC
    Indicator
    RoHS
     
    China
    EFUP
    MCP3421A2T-E/CH
    0.017000
    0.046667
    6
    SOT-23
    -
    Matte Tin
    e3
    MCP3421A0T-E/CH
    0.017000
    0.046667
    6
    SOT-23
    -
    Matte Tin
    e3
    MCP3421A1T-E/CH
    0.017000
    0.046667
    6
    SOT-23
    -
    Matte Tin
    e3
    MCP3421A3T-E/CH
    0.017000
    0.046667
    6
    SOT-23
    -
    Matte Tin
    e3
    To see a complete listing of RoHS data for this device, please Click here
    Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.
    Related Video