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8-Bit, 16-/8-Channel, 300ksps ADCs with FIFO and Internal Reference

Complete Family of Low-Cost, 8-Bit, 8-/16-Channel ADCs with Internal Reference, FIFO, and SPI Interface

Product Details

Key Features

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 8
# Input Channels 16
Conv. Rate (ksps) (max) 300
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input S.E. Only
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 1
External VREF (V) (max) 5.25
Unipolar VIN (V) (max) 4.096
INL (±LSB) 0.5
Package/Pins QSOP/24
Budgetary
Price (See Notes)
2.42
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Simplified Block Diagram

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Parameters

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 8
# Input Channels 16
Conv. Rate (ksps) (max) 300
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input S.E. Only
Internal VREF (V) (nominal) 4.096
External VREF (V) (min) 1
External VREF (V) (max) 5.25
Unipolar VIN (V) (max) 4.096
INL (±LSB) 0.5
Package/Pins QSOP/24
Budgetary
Price (See Notes)
2.42

Key Features

  • Analog Multiplexer with Track-and-Hold
    • 16 Channels (MAX11642/MAX11643)
    • 8 Channels (MAX11638/MAX11639)
  • Single Supply
    • 2.7V to 3.6V (MAX11639/MAX11643)
    • 4.75V to 5.25V (MAX11638/MAX11642)
  • Internal Reference
    • 2.5V (MAX11639/MAX11643)
    • 4.096V (MAX11638/MAX11642)
  • External Reference: 1V to VDD
  • 16-Entry First-In/First-Out (FIFO)
  • Scan Mode, Internal Averaging, and Internal Clock
  • Accuracy: ±1 LSB INL, ±1 LSB DNL, No Missing Codes Over Temperature
  • 10MHz 3-Wire SPI-/QSPI-/MICROWIRE-Compatible Interface
  • Small Packages
    • 16-Pin QSOP (MAX11638/MAX11639)
    • 24-Pin QSOP (MAX11642/MAX11643)

Applications/Uses

  • Data Logging
  • Data-Acquisition Systems
  • Industrial Control Systems
  • Instrumentation
  • Patient Monitoring
  • System Supervision

Description

The MAX11638/MAX11639/MAX11642/MAX11643 are serial 8-bit analog-to-digital converters (ADCs) with an internal reference. 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 MAX11642/MAX11643 have 16 input channels and the MAX11638/MAX11639 have 8 input channels. These four devices operate from either a +3V supply or a +5V supply, and contain a 10MHz SPI/QSPI™/MICROWIRE®-compatible serial port.

The MAX11638/MAX11639 are available in 16-pin QSOP packages. The MAX11642/MAX11643 are available in 24-pin QSOP packages. All four devices are specified over the extended -40°C to +85°C temperature range.

Simplified Block Diagram

MAX11638, MAX11639, MAX11642, MAX11643: Functional Diagram MAX11638, MAX11639, MAX11642, MAX11643: 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 .