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+2.7V, Low-Power, Multichannel, Serial, 8-Bit ADCs

Lowest-Power 8-Bit 4/8-Channel ADCs Have Internal Reference

Product Details

The MAX1110/MAX1111 low-power, 8-bit, 8-channel analog-to-digital converters (ADCs) feature an internal track/hold, voltage reference, clock, and serial interface. They operate from a single 2.7V to 5.5V supply and consume only 85µA while sampling at rates up to 50ksps. The MAX1110's 8 analog inputs and the MAX1111's 4 analog inputs are software-configurable, allowing unipolar/bipolar and single-ended/differential operation.

Successive-approximation conversions are performed using either the internal clock or an external serial-interface clock. The full-scale analog input range is determined by the 2.048V internal reference, or by an externally applied reference ranging from 1V to VDD. The 4-wire serial interface is compatible with the SPI™, QSPI™, and MICROWIRE™ serial-interface standards. A serial-strobe output provides the end-of-conversion signal for interrupt-driven processors.

The MAX1110/MAX1111 have a software-programmable, 2µA automatic power-down mode to minimize power consumption. Using power-down, the supply current is reduced to 6µA at 1ksps, and only 52µA at 10ksps. Power-down can also be controlled using the active-low SHDN input pin. Accessing the serial interface automatically powers up the device.

The MAX1110 is available in a 20-pin SSOP package. The MAX1111 is available in a small 16-pin QSOP package.

Key Features

  • 2.7V to 5.5V Single Supply
  • Low Power
    • 85µA at 50ksps
    • 6µA at 1ksps
  • 8-Channel Single-Ended or 4-Channel Differential Inputs (MAX1110)
  • 4-Channel Single-Ended or 2-Channel Differential Inputs (MAX1111)
  • Internal Track/Hold; 50kHz Sampling Rate
  • Internal 2.048V Reference
  • SPI/QSPI/MICROWIRE-Compatible Serial Interface
  • Software-Configurable Unipolar or Bipolar Inputs
  • Total Unadjusted Error
    • ±1 LSB (max)
    • ±0.3 LSB (typ)

Applications/Uses

  • 4mA to 20mA-Powered Remote Data-Acquisition Systems
  • Hand-Held Measurement Devices
  • Medical Instruments
  • Portable Data Logging
  • Solar-Powered Remote Systems
  • System Diagnostics
Parametric specs for Precision ADCs (≤ 5Msps)
Resolution (bits) (ADC) 8
# Input Channels 8
Conv. Rate (ksps) (max) 50
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 2.048
External VREF (V) (min) 1
External VREF (V) (max) 5.5
Unipolar VIN (V) (max) 2.048
Bipolar VIN (±V) (max) 1.024
INL (±LSB) 0.2
Package/Pins PDIP/20
SSOP/20
Budgetary
Price (See Notes)
$2.17 @1k
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Simplified Block Diagram

MAX1110, MAX1111: Functional Diagram MAX1110, MAX1111: Functional Diagram Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX1110 evaluation system (EV system) is a complete, 8-channel data-acquisition system consisting of a MAX1110 evaluation kit (EV kit) and a Maxim 3V 68L11D microcontroller (µC) module. It is designed to evaluate the MAX1110, a low power, +3V, 8-channel, 8-bit analog-to-digital converter (ADC) with an internal 2.048V reference that directly interfaces to 3V microprocessors. Windows® 3.1/Windows 95 software provides a handy user interface to exercise the MAX1110's features.

The EV system is intended for comprehensive evaluation of the MAX1110 using a personal computer. Order the stand-alone EV kit if the 68L11D µC module has already been purchased with a previous Maxim EV system, or for custom use in other µC-based systems.

The MAX1110 EV kit and EV system can also be used to evaluate the MAX1112, which operates on +5V and has a 4.096V internal reference. Simply order a free sample of the MAX1112CPP along with the MAX1110 EV kit.

View Details

Features

  • Proven PC Board Layout
  • Complete Evaluation System Samples to 5ksps
  • Convenient Test Points Provided on Board
  • Data-Logging Software
  • Fully Assembled and Tested

Description

The MAX1110 evaluation system (EV system) is a complete, 8-channel data-acquisition system consisting of a MAX1110 evaluation kit (EV kit) and a Maxim 3V 68L11D microcontroller (µC) module. It is designed to evaluate the MAX1110, a low power, +3V, 8-channel, 8-bit analog-to-digital converter (ADC) with an internal 2.048V reference that directly interfaces to 3V microprocessors. Windows® 3.1/Windows 95 software provides a handy user interface to exercise the MAX1110's features.

The EV system is intended for comprehensive evaluation of the MAX1110 using a personal computer. Order the stand-alone EV kit if the 68L11D µC module has already been purchased with a previous Maxim EV system, or for custom use in other µC-based systems.

The MAX1110 EV kit and EV system can also be used to evaluate the MAX1112, which operates on +5V and has a 4.096V internal reference. Simply order a free sample of the MAX1112CPP along with the MAX1110 EV kit.

View Details

Features

  • Proven PC Board Layout
  • Complete Evaluation System Samples to 5ksps
  • Convenient Test Points Provided on Board
  • Data-Logging Software
  • Fully Assembled and Tested

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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.

Parameters

Parametric specs for Precision ADCs (≤ 5Msps)
Resolution (bits) (ADC) 8
# Input Channels 8
Conv. Rate (ksps) (max) 50
Data Bus SPI
ADC Architecture SAR
Diff/S.E. Input Both
Internal VREF (V) (nominal) 2.048
External VREF (V) (min) 1
External VREF (V) (max) 5.5
Unipolar VIN (V) (max) 2.048
Bipolar VIN (±V) (max) 1.024
INL (±LSB) 0.2
Package/Pins PDIP/20
SSOP/20
Budgetary
Price (See Notes)
$2.17 @1k

Key Features

  • 2.7V to 5.5V Single Supply
  • Low Power
    • 85µA at 50ksps
    • 6µA at 1ksps
  • 8-Channel Single-Ended or 4-Channel Differential Inputs (MAX1110)
  • 4-Channel Single-Ended or 2-Channel Differential Inputs (MAX1111)
  • Internal Track/Hold; 50kHz Sampling Rate
  • Internal 2.048V Reference
  • SPI/QSPI/MICROWIRE-Compatible Serial Interface
  • Software-Configurable Unipolar or Bipolar Inputs
  • Total Unadjusted Error
    • ±1 LSB (max)
    • ±0.3 LSB (typ)

Applications/Uses

  • 4mA to 20mA-Powered Remote Data-Acquisition Systems
  • Hand-Held Measurement Devices
  • Medical Instruments
  • Portable Data Logging
  • Solar-Powered Remote Systems
  • System Diagnostics

Description

The MAX1110/MAX1111 low-power, 8-bit, 8-channel analog-to-digital converters (ADCs) feature an internal track/hold, voltage reference, clock, and serial interface. They operate from a single 2.7V to 5.5V supply and consume only 85µA while sampling at rates up to 50ksps. The MAX1110's 8 analog inputs and the MAX1111's 4 analog inputs are software-configurable, allowing unipolar/bipolar and single-ended/differential operation.

Successive-approximation conversions are performed using either the internal clock or an external serial-interface clock. The full-scale analog input range is determined by the 2.048V internal reference, or by an externally applied reference ranging from 1V to VDD. The 4-wire serial interface is compatible with the SPI™, QSPI™, and MICROWIRE™ serial-interface standards. A serial-strobe output provides the end-of-conversion signal for interrupt-driven processors.

The MAX1110/MAX1111 have a software-programmable, 2µA automatic power-down mode to minimize power consumption. Using power-down, the supply current is reduced to 6µA at 1ksps, and only 52µA at 10ksps. Power-down can also be controlled using the active-low SHDN input pin. Accessing the serial interface automatically powers up the device.

The MAX1110 is available in a 20-pin SSOP package. The MAX1111 is available in a small 16-pin QSOP package.

Simplified Block Diagram

MAX1110, MAX1111: Functional Diagram MAX1110, MAX1111: 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.