AD698SQ - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

AD698SQ
Manufacturer

ADI
ChipWorker Part#

CW1019454
Category

Amplifier, Buffer IC
Package

CDIP-24
Description

ANALOG DEVICES AD698SQ Signal Conditioner, 20kHz, 13V, 36V, DIP, 24Pins, -55℃
Documentation

Datasheet

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AD698SQ Specifications

Attribute	Attribute Value

Part Number	AD698SQ
Manufacturer	ADI
ChipWorker Part#	CW1019454
Category	Amplifier, Buffer IC
Documentation	Datasheet
Mounting Style	Through Hole
Number of Pins	24 Pin
Case/Package	CDIP-24
Supply Voltage (DC)	13.0V (min)
Supply Current	15 mA
Number of Positions	24 Position
Bandwidth	20 kHz
Operating Temperature (Max)	125 ℃
Operating Temperature (Min)	-55 ℃
Supply Voltage (Max)	36 V
Supply Voltage (Min)	13 V
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Size-Width	7.87 mm
Size-Height	3.56 mm
Operating Temperature	-55℃ ~ 125℃
Product Lifecycle Status	Active
Packaging	Tube
RoHS	Non-Compliant
Lead-Free Status	Contains Lead
REACH SVHC Compliance Edition	2015/12/17
ECCN Code	EAR99

Product Description

Product Details
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.
### Features and Benefits
Single Chip Solution, Contains Internal Oscillator and Voltage Reference
No Adjustments Required
Interfaces to Half-Bridge, 4-Wire LVDT
DC Output Proportional to Position
20 Hz to 20 kHz Frequency Range
Unipolar or Bipolar Output
Will Also Decode AC Bridge Signals
Outstanding Performance
Linearity: 0.05%
Output Voltage: ±11 V
Gain Drift: 20 ppm/°C (typ)
Offset Drift: 5 ppm/°C (typ)

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