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See Technical Specifications

AD698APZ +BOM

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

Manufacturer:

Analog Devices, Inc
Mfr.Part #:

AD698APZ
Datasheet:

AD698APZ Datasheet (PDF)
Programmable:

Not Verified
Type:

Signal Conditioner
Input Type:

Voltage
Output Type:

Voltage
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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

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

Specifications

Category	Integrated Circuits (ICs)InterfaceSensor and Detector Interfaces	Series	-
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	Base Product Number	AD698

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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!