12-Bit 300ksps ADCs with FIFO, Temp Sensor, Internal Reference

16-Channel, 12-/10-Bit ADCs Feature Internal Temp Sensor and Minimize Microprocessor I/O Requirements

Please check latest availability status for a specific part variant.


The MAX1226/MAX1228/MAX1230 are serial 12-bit analog-to-digital converters (ADCs) with an internal reference and an internal temperature sensor. These devices feature on-chip FIFO, scan mode, internal clock mode, internal averaging, and AutoShutdown™. The maximum sampling rate is 300ksps using an external clock. The MAX1230 has 16 input channels, the MAX1228 has 12 input channels, and the MAX1226 has 8 input channels. All input channels are configurable for single-ended or differential inputs in unipolar or bipolar mode. All three devices operate from a +5V supply and contain a 10MHz SPI™/QSPI™/MICROWIRE™-compatible serial port.

The MAX1230 is available in 28-pin 5mm x 5mm QFN with exposed pad and 24-pin QSOP packages. The MAX1226/MAX1228 are only available in QSOP packages. All three devices are specified over the extended -40°C to +85°C temperature range.
MAX1226, MAX1228, MAX1230: Functional Diagram MAX1226, MAX1228, MAX1230: Functional Diagram Enlarge+

Key Features

  • Internal Temperature Sensor (±0.7°C Accuracy)
  • 16-Entry First-In/First-Out (FIFO)
  • Analog Multiplexer with True Differential Track/Hold
    • 16-, 12-, 8-Channel Single Ended
    • 8-, 6-, 4-Channel True Differential (Unipolar or Bipolar)
  • Accuracy: ±1 LSB INL, ±1 LSB DNL, No Missing Codes Over Temperature
  • Scan Mode, Internal Averaging, and Internal Clock
  • Low-Power Single +5V Operation
    • 2.3mA at 300ksps
  • Internal 4.096V Reference or External Differential Reference
  • 10MHz 3-Wire SPI/QSPI/MICROWIRE-Compatible Interface
  • Space-Saving 28-Pin 5mm x 5mm Thin QFN Package


  • Data Acquisition Systems
  • Data Logging
  • Industrial Control Systems
  • Instrumentation
  • Patient Monitoring
  • System Supervision
Part NumberResolution
Input Chan.Conv. Rate
ADC ArchitectureData BusDiff/S.E. InputInternal VREF
External VREF
External VREF
Unipolar VIN
Bipolar VIN
ADCmaxnominalminmaxmaxmaxSee Notes
MAX1226 128300SARSPIBoth4.09615.254.0962.04870-821
$8.02 @1k
MAX1228 12
$8.22 @1k
MAX1230 16
$8.43 @1k
See All Precision ADCs (< 5Msps) (444)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX11633EVSYS: Evaluation Systems for the MAX1030, MAX1031, MAX1230, MAX1231, MAX11624, MAX11625, MAX11632, MAX11633, MAX11634, MAX11635, MAX11642, and MAX11643
MAX11635EVSYS: Evaluation Systems for the MAX1030, MAX1031, MAX1230, MAX1231, MAX11624, MAX11625, MAX11632, MAX11633, MAX11634, MAX11635, MAX11642, and MAX11643
MAX1231BEVSYS: Evaluation Systems for the MAX1030, MAX1031, MAX1230, MAX1231, MAX11624, MAX11625, MAX11632, MAX11633, MAX11634, MAX11635, MAX11642, and MAX11643

Technical Documents

Tutorial 4685 How Continuous Positive Airway Pressure (CPAP) Respiratory Ventilation Systems Function

Quality and Environmental Data

Product Reliability Reports: MAX1228.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

For 10-bit Applications, please see MAX1026, MAX1028, MAX1030

CAD Symbols and Footprints

  • MAX1228BCEP+
  • MAX1228BCEP+T
  • MAX1228BEEP+
  • MAX1228BEEP+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >


    Related Resources

    Belle Isle 2020
    05/29/2020 - 05/31/2020, Detroit, MI
    2020 Detroit Grand Prix - Chevrolet Detroit Grand Prix presented by Lear Fast Facts The Chevrolet Detroit Grand Prix presented by Lear was hosted on Belle Isle, May 29 - 30 2020. The event featured the cars of the NTT IndyCar Series, the IMSA WeatherTech SportsCar Championship and the Trans Am Series presented by Pirelli. The weekend is collectively referred to as the Chevrolet Detroit Grand Prix presented by Lear and it once again featured the Chevrolet Dual in Detroit IndyCar doubleheader.