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12-Bit, 300ksps ADCs with Differential Track/Hold, and Internal Reference

Complete Family of Low-Cost, 12-Bit, 4-/8-Channel ADCs with Internal Reference, FIFO, and SPI Interface

Product Details

Key Features

Parametric specs for Precision ADCs (< 5Msps)
Resolution (bits) (ADC) 12
# Input Channels 8
Conv. Rate (ksps) (max) 300
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 2.5
External VREF (V) (min) 0
External VREF (V) (max) 3.6
Unipolar VIN (V) (max) 2.5
Bipolar VIN (±V) (max) 1.25
INL (±LSB) 1
Package/Pins QSOP/16
Budgetary
Price (See Notes)
3.82
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Simplified Block Diagram

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Parameters

Parametric specs for Precision ADCs (<u><</u> 5Msps)
Resolution (bits) (ADC) 12
# Input Channels 8
Conv. Rate (ksps) (max) 300
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 2.5
External VREF (V) (min) 0
External VREF (V) (max) 3.6
Unipolar VIN (V) (max) 2.5
Bipolar VIN (±V) (max) 1.25
INL (±LSB) 1
Package/Pins QSOP/16
Budgetary
Price (See Notes)
3.82

Key Features

  • Analog Multiplexer with True Differential Track/Hold
    • 8-/4-Channel Single Ended
    • 4-/2-Channel True Differential
    • Unipolar or Bipolar Inputs
  • Single Supply
    • 2.7V to 3.6V (MAX11635/MAX11637)
    • 4.75V to 5.25V (MAX11634/MAX11636)
  • 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 16-Pin QSOP Package

Applications/Uses

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

Description

The MAX11634–MAX11637 are serial 12-bit analog-to-digital converters (ADCs) with an internal reference and true differential track/hold. 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 MAX11636/MAX11637 have 8 input channels and the MAX11634/ MAX11635 have 4 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 MAX11634–MAX11637 are available in a 16-pin QSOP package. All four devices are specified over the extended -40°C to +85°C temperature range.

Simplified Block Diagram

MAX11634, MAX11635, MAX11636, MAX11637: Functional Diagram MAX11634, MAX11635, MAX11636, MAX11637: 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 .