The Intersil ICL7135 precision A/D converter, with its multiplexed BCD output and digit drivers, combines dual-slope conversion reliability with ±1 in 20, 000 count accuracy and is ideally suited for the visual display DVM/DPM market. The 2. 0000V full scale capability, auto-zero, and auto-polarity are combined with true ratiometric operation, almost ideal differential linearity and true differential input. All necessary active devices are contained on a single CMOS lC, with the exception of display drivers, reference, and a clock. The ICL7135 brings together an unprecedented combination of high accuracy, versatility, and true economy. It features auto-zero to less than 10µV, zero drift of less than 1µV/oC, input bias current of 10pA (Max), and rollover error of less than one count. The versatility of multiplexed BCD outputs is increased by the addition of several pins which allow it to operate in more sophisticated systems. These include STROBE, OVERRANGE, UNDERRANGE, RUN/HOLD and BUSY lines, making it possible to interface the circuit to a microprocessor or UART.


  • Wide VIN range of 6V to 40V
  • Adjustable output voltage from 2.5V to 12V
  • Ensured 150mA output current
  • Ultra low 18µA typical quiescent current
  • Low 2µA of typical shutdown current
  • ±1% accurate voltage reference (over temperature, load)
  • Low dropout voltage of 295mV at 150mA
  • Low 26µVRMS noise
  • 40V tolerant logic level (TTL/CMOS) enable input
  • Stable operation with 10µF output capacitor
  • 5kV ESD HBM rated
  • Thermal shutdown and current limit protection
  • Thermally enhanced 14 Ld exposed pad HTSSOP package

Product Options

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Active PDIP Tube 143


Title language Type Format File Size Date
Datasheets & Errata
ICL7135 Datasheet Datasheet PDF 842 KB
Application Notes & White Papers
AN016: Selecting A/D Converters Application Note PDF 458 KB
AN017: The Integrating A/D Converter (ICL7135) Application Note PDF 374 KB
AN9675: A Tutorial in Coherent and Windowed Sampling with A/D Converters Application Note PDF 503 KB
AN028: Building an Auto-Ranging DMM with the ICL7103A/ICL8052A Application Note PDF 616 KB
AN018: Do's and Don'ts of Applying A/D Converters Application Note PDF 289 KB
AN023: Low Cost Digital Panel Meter Designs and Complete Instructions for LCD and LED Kits Application Note PDF 529 KB
AN054: Display Driver Family Combines Convenience of Use with Microprocessor Interfaceability Application Note PDF 1.57 MB
AN002: Principles of Data Acquisition and Conversion Application Note PDF 1.08 MB
AN9510: Basic Analog for Digital Designers Application Note PDF 508 KB
AN9609: Overcoming Common Mode Range Issues When Using Intersil Integrating Converters Application Note PDF 299 KB
AN9705: A Theoretical View of Coherent Sampling Application Note PDF 287 KB
Analog ICs Brochure 日本語 Brochure PDF 4.20 MB