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The AD598AD is a versatile signal conditioner that converts voltage to frequency


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Overview of AD598AD

The AD598AD is a complete, monolithic Excitation Controller IC designed for use in sensor signal conditioning applications. This IC provides precision control and amplification of sensor signals, making it ideal for a wide range of sensor interface applications.


(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

  • VREF: Reference Voltage
  • IN+: Positive Input for Signal
  • IN-: Negative Input for Signal
  • VOUT: Output Signal
  • V+: Positive Power Supply
  • V-: Ground/Power Supply

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the AD598AD IC for a visual representation.

Key Features

  • Monolithic Excitation Controller: The AD598AD integrates all necessary functions for sensor excitation and signal processing in a single IC.
  • Precision Signal Conditioning: This IC offers high precision amplification and control of sensor signals, ensuring accurate measurements.
  • Low Noise: With its low noise characteristics, the AD598AD enables clear signal processing without interference.
  • Wide Operating Voltage Range: Operates from a single power supply, making it compatible with various system configurations.
  • High Accuracy: Provides precise control and amplification for sensor signals, enhancing overall system performance.

Note: For detailed technical specifications, please refer to the AD598AD datasheet.


  • Sensor Interface: Ideal for sensor signal conditioning and excitation in various measurement and control applications.
  • Data Acquisition Systems: Suitable for use in data acquisition systems requiring precise signal amplification and control.
  • Industrial Automation: Used in industrial automation systems for interfacing with sensors and transducers.


The AD598AD is designed to provide accurate and reliable excitation control and signal conditioning for sensor interfaces. It enhances signal quality and facilitates precise measurements in sensor-based applications.

Usage Guide

  • Power Supply: Connect V+ (Pin 5) to the positive power supply and V- (Pin 6) to ground.
  • Signal Connections: Connect the sensor signal input (IN+ and IN-) to the sensor outputs for signal processing.
  • Output: The amplified and conditioned signal is available at the VOUT pin for further processing.

Frequently Asked Questions

Q: What is the reference voltage range of the AD598AD?
A: The AD598AD operates with a reference voltage range typically between 2.5V to 10V.

Q: Is the AD598AD suitable for low-power applications?
A: Yes, the AD598AD offers low power consumption, making it suitable for energy-efficient sensor conditioning applications.


For similar functionalities, consider these alternatives to the AD598AD:

  • AD595: This is a complete temperature measurement system from Analog Devices, providing similar precision and signal conditioning capabilities.
  • AD694: A monolithic 4-20mA current loop transmitter from Analog Devices, offering precise signal amplification and control.


The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Product Category Sensor Interface RoHS N
Type LVDT Signal Conditioner Interface Type LVDT
Supply Voltage - Max 13 V Supply Voltage - Min 13 V
Operating Supply Current 15 mA Minimum Operating Temperature - 40 C
Maximum Operating Temperature + 85 C Mounting Style Through Hole
Package / Case CDIP-20 SB Brand Analog Devices
Features Internal Oscillator, Voltage Reference Height 2.16 mm
Ib - Input Bias Current 5 uA Input Type Voltage
Input Voltage 100 mV to 3.5 V Length 25.4 mm
Number of Channels 1 Channel Operating Supply Voltage 13 V
Output Current 30 mA Output Type Voltage
Output Voltage 2.1 V to 24 V Product Type Sensor Interface
Series AD598 Factory Pack Quantity 1
Subcategory Interface ICs Width 7.37 mm
Unit Weight 0.080178 oz

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