MAX1231

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


Please check latest availability status for a specific part variant.

Description

The MAX1227/MAX1229/MAX1231 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 MAX1231 has 16 input channels, the MAX1229 has 12 input channels, and the MAX1227 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 +3V supply and contain a 10MHz SPI™/QSPI™/MICROWIRE™-compatible serial port.

The MAX1231 is available in 28-pin 5mm x 5mm TQFN with exposed pad and 24-pin QSOP packages. The MAX1227/MAX1229 are only available in QSOP packages. All three devices are specified over the extended -40°C to +85°C temperature range.

MAX1227, MAX1229, MAX1231: Functional Diagram MAX1227, MAX1229, MAX1231: 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 Overtemperature
  • Scan Mode, Internal Averaging, and Internal Clock
  • Low-Power Single +3V Operation
    • 1mA at 300ksps
  • Internal 2.5V Reference or External Differential Reference
  • 10MHz 3-Wire SPI-/QSPI-/MICROWIRE-Compatible Interface
  • Space-Saving 28-Pin 5mm x 5mm TQFN Package

Applications/Uses

  • Data Acquisition Systems
  • Data Logging
  • Industrial Control Systems
  • Instrumentation
  • Patient Monitoring
  • System Supervision
Part NumberResolution
(bits)
Input Chan.Conv. Rate
(ksps)
ADC ArchitectureData BusDiff/S.E. InputInternal VREF
(V)
External VREF
(V)
External VREF
(V)
Unipolar VIN
(V)
Bipolar VIN
(±V)
SNR
(dB)
THD
(dB)
INL
(±LSB)
Package/PinsBudgetary
Price
ADCmaxnominalminmaxmaxmaxSee Notes
MAX1227 128300SARSPIBoth2.513.62.51.2570-821
QSOP/16
$8.02 @1k
MAX1229 12
QSOP/20
$7.62 @1k
MAX1231 16
QSOP/24
TQFN/28
$5.50 @1k
See All Precision ADCs (< 5Msps) (464)
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

CAD Symbols and Footprints

  • MAX1231ACEG
  • MAX1231ACEG+
  • MAX1231ACEG+T
  • MAX1231ACEG-T
  • MAX1231AEEG
  • MAX1231AEEG+
  • MAX1231AEEG+T
  • MAX1231AEEG-T
  • MAX1231BCEG
  • MAX1231BCEG+
  • MAX1231BCEG+T
  • MAX1231BCEG-T
  • MAX1231BCTI
  • MAX1231BCTI+
  • MAX1231BCTI+T
  • MAX1231BCTI-T
  • MAX1231BEEG
  • MAX1231BEEG+
  • MAX1231BEEG+T
  • MAX1231BETI+
  • MAX1231BETI+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.

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