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3 1/2 Digit A/D Converters

Product Details

The Maxim ICL7106/ICL7107 are monolithic analog-to-digital converters (ADCs). They have very high input impedances and require no external display drive circuitry. On-board active components include polarity and digit drivers, segment decoders, voltage reference and a clock circuit. The ICL7106 will directly drive a nonmultiplexed liquid crystal display (LCD), whereas the ICL7107 will directly drive a common anode light emitting diode (LED) display.

Versatility and accuracy are inherent features of these converters. The dual-slope conversion technique automatically rejects interference signals common in industrial environments. The true differential input and reference are particularly useful when making ratiometric measurements (ohms or bridge transducers). Maxim has added a zero-integrator phase to the ICL7106 and ICL7107, eliminating overrange hangover and hysteresis effects. Finally, these devices offer high accuracy by lowering rollover error to less than one count and zero reading drift to less than 1µV/°C.

These devices are used in a wide range of digital panel meter applications. Most applications, however, involve the measurement and display of analog data.

Key Features

  • Improved 2nd Source (see Page 3 of the full data sheet for "Maxim Advantage")
  • Guaranteed First Reading Recovery from Overrange
  • On-Board Display Drive Capability—No External Circuitry Required
    • LCD—ICL7106
    • LED—ICL7107
  • High-Impedance CMOS Differential Inputs
  • Low Noise (< 15µVP-P) without Hysteresis or Overrange Hangover
  • Clock and Reference On-Chip
  • True Differential Reference and Input
  • True Polarity Indication for Precision Null Applications
  • Monolithic CMOS Design

Applications/Uses

  • Conductance
  • Current
  • Material Thickness
  • Pressure
  • Resistance
  • Speed
  • Temperature
  • Voltage
Parametric specs for Display-Oriented ADCs
Resolution (±Counts) 2000
# Input Channels 1
Conv. Rate (ksps) (max) 0.003
Data Bus 7-Segment
Diff/S.E. Input Diff. Only
Internal VREF (V) (nominal) 2.8
External VREF (V) (min) -
External VREF (V) (max) 9
Bipolar VIN (±V) (max) 3.5
Package/Pins PDIP/40
PLCC/44
Budgetary
Price (See Notes)
$6.32 @1k
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Simplified Block Diagram

ICL7106, ICL7107: Typical Operating Circuit ICL7106, ICL7107: Typical Operating Circuit Zoom icon

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Parameters

Parametric specs for Display-Oriented ADCs
Resolution (±Counts) 2000
# Input Channels 1
Conv. Rate (ksps) (max) 0.003
Data Bus 7-Segment
Diff/S.E. Input Diff. Only
Internal VREF (V) (nominal) 2.8
External VREF (V) (min) -
External VREF (V) (max) 9
Bipolar VIN (±V) (max) 3.5
Package/Pins PDIP/40
PLCC/44
Budgetary
Price (See Notes)
$6.32 @1k

Key Features

  • Improved 2nd Source (see Page 3 of the full data sheet for "Maxim Advantage")
  • Guaranteed First Reading Recovery from Overrange
  • On-Board Display Drive Capability—No External Circuitry Required
    • LCD—ICL7106
    • LED—ICL7107
  • High-Impedance CMOS Differential Inputs
  • Low Noise (< 15µVP-P) without Hysteresis or Overrange Hangover
  • Clock and Reference On-Chip
  • True Differential Reference and Input
  • True Polarity Indication for Precision Null Applications
  • Monolithic CMOS Design

Applications/Uses

  • Conductance
  • Current
  • Material Thickness
  • Pressure
  • Resistance
  • Speed
  • Temperature
  • Voltage

Description

The Maxim ICL7106/ICL7107 are monolithic analog-to-digital converters (ADCs). They have very high input impedances and require no external display drive circuitry. On-board active components include polarity and digit drivers, segment decoders, voltage reference and a clock circuit. The ICL7106 will directly drive a nonmultiplexed liquid crystal display (LCD), whereas the ICL7107 will directly drive a common anode light emitting diode (LED) display.

Versatility and accuracy are inherent features of these converters. The dual-slope conversion technique automatically rejects interference signals common in industrial environments. The true differential input and reference are particularly useful when making ratiometric measurements (ohms or bridge transducers). Maxim has added a zero-integrator phase to the ICL7106 and ICL7107, eliminating overrange hangover and hysteresis effects. Finally, these devices offer high accuracy by lowering rollover error to less than one count and zero reading drift to less than 1µV/°C.

These devices are used in a wide range of digital panel meter applications. Most applications, however, involve the measurement and display of analog data.

Simplified Block Diagram

ICL7106, ICL7107: Typical Operating Circuit ICL7106, ICL7107: Typical Operating Circuit 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.