ICL7135CN
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Texas Instruments ICL7135CN

Manufacturer No:
ICL7135CN
Manufacturer:
Texas Instruments
Package:
Tube
Description:
IC DISPLAY DRIVR 4.5DIGIT 28DIP
Delivery:
Payment:
iso14001
iso45001
iso9001
iso13485

Product Introduction

Overview

The ICL7135CN, produced by Texas Instruments, is a high-precision 4.5-digit analog-to-digital (A/D) converter. This monolithic device utilizes dual-slope conversion, offering reliability and accuracy with ±1 in 20,000 count accuracy and a 2.0000V full-scale capability. It features high impedance differential inputs, nearly ideal differential linearity, true ratiometric operation, auto-zero, and auto-polarity. The device is designed for easy interface with external display drivers and microprocessors, making it ideal for use in microprocessor-based data acquisition and control systems.

Key Specifications

Parameter Min Typ Max Units
Zero Input Reading -0.0000 ±0.0000 +0.0000 Digital Reading
Full Scale Reading +0.9995 +0.9999 +1.0000 Digital Reading
Linearity over ± Full Scale 0.5 1 - Digital Count Error
Rollover Error 0.5 1 - Digital Count Error
Input Bias Current - 1 pA 10 pA pA
Zero Drift - - 0.5 µV/°C µV/°C
Voltage Supply 4 V - 6 V V
Operating Temperature 0°C - 70°C °C
Package - - 28-DIP (0.600", 15.24mm) -

Key Features

  • High precision 4.5-digit A/D conversion with dual-slope integration.
  • High impedance differential inputs with nearly ideal differential linearity.
  • True ratiometric operation, auto-zero, and auto-polarity.
  • Multiplexed BCD outputs and digit drivers for easy interface with external display drivers.
  • Control signals for interfacing with UARTs or microprocessors, including STROBE, OVERRANGE, UNDERRANGE, RUN/HOLD, and BUSY lines.
  • Low rollover error of ±1 count maximum.
  • CMOS buffer with a common mode input voltage range and low quiescent current.
  • Integrator amplifier with high linearity and output current capability.
  • TTL-compatible outputs.

Applications

  • Microprocessor-based data acquisition and control systems.
  • Precision digital voltmeters (DVMs) and digital panel meters (DPMs).
  • Industrial control and measurement systems.
  • Medical and scientific instruments requiring high precision A/D conversion.
  • Automated test and measurement equipment.

Q & A

  1. What is the precision of the ICL7135CN A/D converter?

    The ICL7135CN offers ±1 in 20,000 count accuracy and a 2.0000V full-scale capability.

  2. What type of conversion does the ICL7135CN use?

    The ICL7135CN uses dual-slope integration for A/D conversion.

  3. What are the key features of the ICL7135CN's input stage?

    The device features high impedance differential inputs, nearly ideal differential linearity, and true ratiometric operation.

  4. How does the ICL7135CN interface with external devices?

    The ICL7135CN provides multiplexed BCD outputs and digit drivers, along with control signals like STROBE, OVERRANGE, UNDERRANGE, RUN/HOLD, and BUSY lines for easy interface with microprocessors and UARTs.

  5. What is the typical input bias current of the ICL7135CN?

    The typical input bias current is 1 pA, with a maximum of 10 pA.

  6. What is the operating temperature range of the ICL7135CN?

    The operating temperature range is from 0°C to 70°C.

  7. What is the package type of the ICL7135CN?

    The ICL7135CN is packaged in a 28-DIP (0.600", 15.24mm) package.

  8. What are some common applications of the ICL7135CN?

    Common applications include microprocessor-based data acquisition and control systems, precision DVMs and DPMs, industrial control and measurement systems, and medical and scientific instruments.

  9. Does the ICL7135CN have autoranging capability?

    Yes, the ICL7135CN has autoranging capability with over-and under-range signals.

  10. What is the typical quiescent current of the CMOS buffer in the ICL7135CN?

    The CMOS buffer has a quiescent current of approximately 100 µA.

Product Attributes

Type:Display Driver
Number of Channels:1
Resolution (Bits):4.5 Digit
Sampling Rate (Per Second):- 
Data Interface:- 
Voltage Supply Source:Single Supply
Voltage - Supply:4V ~ 6V
Operating Temperature:0°C ~ 70°C
Mounting Type:Through Hole
Package / Case:28-DIP (0.600", 15.24mm)
Supplier Device Package:28-PDIP
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