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18-Bit, Single-Channel, Ultra-Low Power, Delta-Sigma ADC with 2-Wire Serial Interface

Pin-Compatible Version of 24-/20-/16-Bit Family

Product Details

The MAX11212 is an ultra-low-power (< 300µA max active current), high-resolution, serial output ADC. This device provides the highest resolution per unit power in the industry and is optimized for applications that require very high dynamic range with low power such as sensors on a 4mA to 20mA industrial control loop. The MAX11212 provides a high-accuracy internal oscillator that requires no external components.

When used with the specified data rates, the internal digital filter provides more than 80dB rejection of 50Hz or 60Hz line noise. The MAX11212 provides a simple 2-wire serial interface in the space-saving, 10-pin µMAX® package. The MAX11212 operates over the -40°C to +85°C temperature range.

Key Features

  • 18-Bit Full-Scale Resolution
  • 720nVRMS Noise (MAX11212B)
  • 3ppm INL
  • No Missing Codes
  • Ultra-Low Power Dissipation
    • Operating Mode Current Drain < 300µA (max)
    • Sleep Mode Current Drain < 0.1µA
  • 2.7V to 3.6V Analog Supply Voltage Range
  • 1.7V to 3.6V Digital and I/O Supply Voltage Range
  • Fully Differential Signal Inputs
  • Fully Differential Reference Inputs
  • Internal System Clock
    • 2.4576MHz (MAX11212A)
    • 2.2528MHz (MAX11212B)
  • External Clock
  • Serial 2-Wire Interface (Clock Input and Data Output)
  • On-Demand Offset and Gain Self-Calibration
  • -40°C to +85°C Operating Temperature Range
  • ±2kV ESD Protection
  • Lead(Pb)-Free and RoHS-Compliant µMAX Package

Applications/Uses

  • Battery Applications
  • Portable Instrumentation
  • Sensor Measurement (Temperature and Pressure)
  • Weigh Scales
Parametric specs for Precision ADCs (&le; 5Msps)
Resolution (bits) (ADC) 18
# Input Channels 1
Conv. Rate (ksps) (max) 0.12
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) 3.6
INL (±LSB) 10
Package/Pins UMAX/10
Budgetary
Price (See Notes)
$1.84 @1k
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Simplified Block Diagram

MAX11212: Functional Diagram MAX11212: Functional Diagram Zoom icon

Technical Docs

Design & Development

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Support & Training

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Parameters

Parametric specs for Precision ADCs (&le; 5Msps)
Resolution (bits) (ADC) 18
# Input Channels 1
Conv. Rate (ksps) (max) 0.12
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) 3.6
INL (±LSB) 10
Package/Pins UMAX/10
Budgetary
Price (See Notes)
$1.84 @1k

Key Features

  • 18-Bit Full-Scale Resolution
  • 720nVRMS Noise (MAX11212B)
  • 3ppm INL
  • No Missing Codes
  • Ultra-Low Power Dissipation
    • Operating Mode Current Drain < 300µA (max)
    • Sleep Mode Current Drain < 0.1µA
  • 2.7V to 3.6V Analog Supply Voltage Range
  • 1.7V to 3.6V Digital and I/O Supply Voltage Range
  • Fully Differential Signal Inputs
  • Fully Differential Reference Inputs
  • Internal System Clock
    • 2.4576MHz (MAX11212A)
    • 2.2528MHz (MAX11212B)
  • External Clock
  • Serial 2-Wire Interface (Clock Input and Data Output)
  • On-Demand Offset and Gain Self-Calibration
  • -40°C to +85°C Operating Temperature Range
  • ±2kV ESD Protection
  • Lead(Pb)-Free and RoHS-Compliant µMAX Package

Applications/Uses

  • Battery Applications
  • Portable Instrumentation
  • Sensor Measurement (Temperature and Pressure)
  • Weigh Scales

Description

The MAX11212 is an ultra-low-power (< 300µA max active current), high-resolution, serial output ADC. This device provides the highest resolution per unit power in the industry and is optimized for applications that require very high dynamic range with low power such as sensors on a 4mA to 20mA industrial control loop. The MAX11212 provides a high-accuracy internal oscillator that requires no external components.

When used with the specified data rates, the internal digital filter provides more than 80dB rejection of 50Hz or 60Hz line noise. The MAX11212 provides a simple 2-wire serial interface in the space-saving, 10-pin µMAX® package. The MAX11212 operates over the -40°C to +85°C temperature range.

Simplified Block Diagram

MAX11212: Functional Diagram MAX11212: 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.