AD2S99APZ Analog Devices Inc, AD2S99APZ Datasheet

IC, PROG OSCILLATOR, 20KHZ, 5.25V, LCC20

AD2S99APZ

Manufacturer Part Number

AD2S99APZ

Description

IC, PROG OSCILLATOR, 20KHZ, 5.25V, LCC20

Manufacturer

Analog Devices Inc

Type

Oscillator, Sinusoidalr

Datasheet

1.AD2S99APZ.pdf (8 pages)

Specifications of AD2S99APZ

Supply Voltage Range

Â± 4.75V To Â± 5.25V

Digital Ic Case Style

LCC

No. Of Pins

Operating Temperature Range

-40Â°C To +85Â°C

Frequency Max

20kHz

Termination Type

SMD

Frequency

20kHz

Voltage - Supply

±4.75 V ~ 5.25 V

Current - Supply

8mA

Operating Temperature

-40°C ~ 85°C

Package / Case

20-PLCC

Filter Terminals

SMD

Rohs Compliant

Yes

Accuracy

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Count

Lead Free Status / RoHS Status

Lead free / RoHS Compliant, Lead free / RoHS Compliant

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GENERAL DESCRIPTION

The AD2S99 programmable sinusoidal oscillator provides sine

wave excitation for resolvers and a wide variety of ac transduc-

ers. The AD2S99 also provides a synchronous reference output

signal (3 V p-p square wave) that is phase locked to its SIN and

COS inputs. In an application, the SIN and COS inputs are

connected to the transducer’s secondary windings.

The synchronous reference output compensates for temperature

and cabling dependent phase shifts and eliminates the need for

external preset phase compensation circuits. The synchronous

reference output can be used as a zero crossing reference for

resolver-to-digital converters such as Analog Devices’ AD2S80A,

AD2S82A, AD2S83 and AD2S90.

The AD2S99 is packaged in a 20-pin PLCC and operates over

REV. B

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

–40 C to +85 C.

FEATURES

Programmable Sinusoidal Oscillator

Synthesized Synchronous Reference Output

Programmable Output Frequency Range: 2 kHz–20 kHz

“Loss-of-Signal” Indicator

20-Pin PLCC Package

Low Cost

APPLICATIONS

Excitation Source for:

Resolvers

Synchros

LVDTs

RVDTs

Pressure Transducers

Load Cells

AC Bridges

PRODUCT HIGHLIGHTS

Dynamic Phase Compensation

The AD2S99 dynamically compensates for any phase variation

in a transducer by phase locking its synchronous reference out-

put to the transducer’s secondary windings.

Programmable Excitation Frequency

The excitation frequency is easily programmed to 2 kHz, 5 kHz,

10 kHz, or 20 kHz by using the frequency select pins. Interme-

diate frequencies are available by adding an external resistor.

Signal Loss Detection

The AD2S99 has the ability to detect if both the transducer sec-

ondary winding connections become disconnected from its SIN

and COS inputs. The “LOS” output pin pulls high when a sig-

nal loss is detected.

Integration

The AD2S99 integrates the transducer excitation, synchronous

reference, and loss of signal detection functions into a small,

cost effective package.

One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.

Tel: 617/329-4700

FBIAS

SEL1

SEL2

AD2S99

FREQUENCY

SELECT

FUNCTIONAL BLOCK DIAGRAM

TRANSDUCER

GENERATOR

SIN

SINE WAVE

DETECT

PHASE

LOGIC

FROM

COS

O/P STAGE

Programmable

PUSH/

PULL

AD2S99

Oscillator

Fax: 617/326-8703

EXC

SYNREF

SYNCHRONOUS

REFERENCE

LOS

TRANSDUCER

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AD2S99APZ Summary of contents

Page 1

FEATURES Programmable Sinusoidal Oscillator Synthesized Synchronous Reference Output Programmable Output Frequency Range: 2 kHz–20 kHz “Loss-of-Signal” Indicator 20-Pin PLCC Package Low Cost APPLICATIONS Excitation Source for: Resolvers Synchros LVDTs RVDTs Pressure Transducers Load Cells AC Bridges GENERAL DESCRIPTION The ...

Page 2

AD2S99–SPECIFICATIONS Parameter FREQUENCY OUTPUT RANGE 2 kHz 5 kHz 10 kHz 20 kHz ACCURACY Frequency Amplitude Power Supply Rejection Ratio ANALOG OUTPUTS Amplitude EXC, EXC SYNREF SYNREF OFFSET Current Drive Capability EXC, EXC Capacitive Drive ...

Page 3

ABSOLUTE MAXIMUM RATINGS ...

Page 4

AD2S99 CONNECTING THE AD2S99 OSCILLATOR Refer to Figure 1. Positive supply voltage V nected to Pin 12 and negative supply voltage V nected to both Pins 19 and 20. Reversal of these power supplies will destroy the device. The appropriate ...

Page 5

AD2S99/AD2S90 TYPICAL CONFIGURATION Figure 3 shows a typical circuit configuration for the AD2S99 Oscillator and the AD2S90 Resolver-to-Digital Converter. The maximum level of the SIN and COS input signals to the AD2S90 should rms 10%. All the ...

Page 6

AD2S99 AD2S99/AD2S82A TYPICAL CONFIGURATION Figure 4 shows a typical circuit configuration for the AD2S99 Oscillator and the AD2S82A Resolver-to-Digital Converter. The maximum level of the SIN and COS input signals to the AD2S82A should rms 10%. All ...

Page 7

AD2S99/AD2S93 TYPICAL CONFIGURATION Figure 5 shows a typical circuit configuration for the AD2S99 Oscillator and the AD2S93 LVDT-to-Digital Converter. The maximum level of the A and B transducer input signals to the AD2S93 should rms 20%. All ...

Page 8

AD2S99 OUT RMS EXC EXC SIN 5 17 AD2S99 DGND AGND 6 TOP VIEW 16 (Not to Scale) COS ...

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