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24-Bit, 5mW, 140dB SNR, 32ksps Delta-Sigma ADC with Integrated PGA

24-Bit ADC Offers the Lowest Power in Its Class

Product Details

Key Features

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 24
# Input Channels 1
Conv. Rate (ksps) (max) 32
Data Bus SPI
ADC Architecture Sigma-Delta
Diff/S.E. Input Both
External VREF (V) (min) 0
External VREF (V) (max) 3.6
Unipolar VIN (V) (max) 3.6
Bipolar VIN (±V) (max) 1.8
INL (±LSB) 4
Package/Pins TSSOP/24
Budgetary
Price (See Notes)
39.18
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Simplified Block Diagram

Technical Docs

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Sampling:
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Parameters

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 24
# Input Channels 1
Conv. Rate (ksps) (max) 32
Data Bus SPI
ADC Architecture Sigma-Delta
Diff/S.E. Input Both
External VREF (V) (min) 0
External VREF (V) (max) 3.6
Unipolar VIN (V) (max) 3.6
Bipolar VIN (±V) (max) 1.8
INL (±LSB) 4
Package/Pins TSSOP/24
Budgetary
Price (See Notes)
39.18

Key Features

  • High Resolution for Instrumentation Applications that Require a Wide Dynamic Range
    • 134dB SNR at 15.6sps
    • 124dB SNR at 500sps
    • 21-Bit Noise-Free Resolution at 50sps
    • 18.6-Bit Noise-Free Resolution at 1ksps
  • Longer Battery Life for Portable Applications
    • 1.2mA Operating Mode Current from AVDD
    • 2.6mA PGA Low-Noise Mode Current from AVDD
    • 1μA Sleep Current
  • High Accuracy for DC Measurements
    • 1ppm INL (typ), 4ppm (max)
  • Single or Split Analog Supplies Provide Input Voltage Range Flexibility
    • 2.7V to 3.6V (Single Supply) or ±1.8V (Split Supplies)
  • Flexible High-Performance Filter Architecture Simplifies Design
    • Programmable SINC + FIR + IIR
    • Linear or Minimum Phase Response
    • Programmable Highpass Filter
    • Selectable FIR Data Rates: 62.5sps to 8ksps
  • Enables System Integration
    • Low-Noise PGA with Gains of 1, 2, 4, 8, 16, 32, 64, 128
    • Signal Buffer Optional
    • 3 General-Purpose I/Os
  • Enables Integrated Part and System Calibration Capability for Gain and Offset
  • Robust 24-Pin TSSOP Packaging

Applications/Uses

  • ATE
  • High-Precision Portable Sensors
  • Medical Equipment
  • Scientific Instrumentation
  • Seismic Data Acquisition

Description

The MAX11214 is a 24-bit delta-sigma ADC that achieves excellent 140dB SNR while dissipating an ultra-low 5mW. Sample rates up to 32ksps allow both precision DC and AC measurements. Integral nonlinearity is guaranteed to 4ppm maximum. The THD is -122dB. The MAX11214 communicates via an SPI-compatible serial interface and is available in a small 24-pin TSSOP package.

The MAX11214 offers a 6.5nV/ noise programmable gain amplifier with gain settings between 1x to 128x. Optional buffers are also included to provide isolation of the signal inputs from the switched capacitor sampling network. This allows the MAX11214 to be used with high-impedance sources without compromising available dynamic range.

The MAX11214 operates from a single 2.7V to 3.6V analog supply, or split ±1.8V analog supplies, allowing the analog input to be sampled below ground. The digital supply range is 2.0V to 3.6V, allowing communication with 2.5V, 3V, or 3.3V logic.

Simplified Block Diagram

MAX11214: Functional Diagram MAX11214: Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.