This website uses cookies. By using this site, you consent to the use of cookies. For more information, please take a look at our Privacy Policy.


Sensor and Detector Interface 36V 4-Wire Interface 28-Pin PLCC Tube

Inquiry Add To Bom

AD698APZ General Description

The AD698 is a complete, monolithic Linear Variable Differential Transformer (LVDT) signal conditioning subsystem. It is used in conjunction with LVDTs to convert transducer mechanical position to a unipolar or bipolar dc voltage with a high degree of accuracy and repeatability. All circuit functions are included on the chip. With the addition of a few external passive components to set frequency and gain, the AD698 converts the raw LVDT output to a scaled dc signal. The device will operate with half-bridge LVDTs, LVDTs connected in the series opposed configuration (4-wire), and RVDTs.

The AD698 contains a low distortion sine wave oscillator to drive the LVDT primary. Two synchronous demodulation channels of the AD698 are used to detect primary and secondary amplitude. The part divides the output of the secondary by the amplitude of the primary and multiplies by a scale factor. This eliminates scale factor errors due to drift in the amplitude of the primary drive, improving temperature performance and stability.

The AD698 uses a unique ratiometric architecture to eliminate several of the disadvantages associated with traditional approaches to LVDT interfacing. The benefits of this new circuit are: no adjustments are necessary; temperature stability is improved; and transducer interchangeability is improved.

The AD698 is available in two performance grades:

GradeTemperature RangePackageAD698AP–40°C to +85°C28-Pin PLCCAD698SQ–55°C to +125°C24-Pin Cerdip

ad698apz ad698apz

Key Features

  • Single chip solution, contains internal oscillator and voltage reference
  • No adjustments required
  • DC output proportional to position
  • 20Hz to 20kHz Frequency range
  • Unipolar or bipolar output
  • Decodes AC bridge signals
  • Outstanding performance
  • 0.05% Linearity
  • 20ppm/°C Typical gain drift
  • 5ppm/°C Typical offset drift


Category Integrated Circuits (ICs)InterfaceSensor and Detector Interfaces Mfr Analog Devices Inc.
Series - Package Tube
Product Status Active Digi-Key Programmable Not Verified
Type Signal Conditioner Input Type Voltage
Output Type Voltage Current - Supply 15 mA
Operating Temperature -40°C ~ 85°C Mounting Type Surface Mount
Package / Case 28-LCC (J-Lead) Supplier Device Package 28-PLCC (11.51x11.51)
Base Product Number AD698

Service Policies and Others

After-Sales & Settlement Related

payment Payment

We accept TT prepayment (bank transfer), paypal, credit cards, Western Union, Money Gram.

If you have specific preferences or requirements for payment channels, please contact our sales team. 

customers are required to pay all possible fees, including sales tax,customs fees, etc.

shipping Shipping And Packing
Shipping Method

Our products are mainly transported and delivered by DHL, FedEx, UPS and other logistics partners on site -- Available to 200+ countries.


AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.

warranty Warranty & Returns

Our policies and procedures are designed to ensure compliance with various quality specifications and to quickly resolve quality-related issues.

We promise to provide 365 days quality assurance service for all our products.

If you have any dissatisfaction with the quality of the product you received, you can contact us for a refund or exchange, as long as the product is kept in its original condition.

Ratings and Reviews

L**n 02/22/2023

I don't know what to describe. The resistor is ordinary, soldered in exchange for a faulty-it works as a machine translates from some languages "very beautiful", "i sit admiring, i can not tear my eyes off it, i am so happy that i have such resistors now." Well, if seriously i recommend.

C**b 04/16/2022

Excellent Seller,great product and Fast Shipping!

C**l 12/08/2021

Everything works fine, for such a price super

K**n 02/22/2020

Thank you very much! I was very pleased!



You need to log in to reply. Sign In | Sign Up