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AD2S99

Programmable Oscillator

Analog Devices 

AD2S99

ABSOLUTE MAXIMUM RATINGS*

VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7 V

VSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –7 V

Operating Temperature . . . . . . . . . . . . . . . . . . –40°C to +85°C

Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C

Analog Input Voltages (SIN and COS) . . . . . . . . . VSS – 0.3 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . to VDD + 0.3 V

Frequency Select (SEL1, SEL2) . . . . . . . . . . . . . . VSS – 0.4 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . to AGND + 0.4 V

*Stresses above those listed under “Absolute Maximum Ratings” may cause

permanent damage to the device. This is a stress rating only and functional

operation of the device at these or any other conditions above those indicated in the

operational section of this specification is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability.

RECOMMENDED OPERATING CONDITIONS

Power Supply Voltage (VDD to VSS) . . . . . . ± 4.75 V to ± 5.25 V

Analog Input Voltage (SIN and COS) . . . . . . . . 2 V rms ± 10%

Frequency Select (SEL1 and SEL2) . . . . . . . . . VSS to AGND

Operating Temperature Range . . . . . . . . . . . . . –40°C to +85°C

Model

AD2S99AP

AD2S99BP

*P = PLCC.

ORDERING GUIDE

Temperature Range Package Option*

–40°C to +85°C

–40°C to +85°C

P-20A

P-20A

PIN DESIGNATIONS

Pin

No.

Mnemonic Description

1

SEL2

Frequency Select 2

2

SEL1

Frequency Select 1

3

FBIAS

External Frequency Adjust Pin

5

SIN

Resolver Output SIN

61

DGND

Digital Ground

7

COS

Resolver Output COS

10

SYNREF

Synthesized Reference Output

11

LOS

Indicates When Both the SIN and

COS Are Below the Threshold.

12

VDD

161

AGND

Positive Power Supply

Analog Ground

17

EXC

Resolver Reference One

18

EXC

Resolver Reference Two3

192

VSS

202

VSS

Negative Power Supply

Negative Power Supply

NOTES

1Pins 6 and 16 must be connected together.

2Pins 19 and 20 must be connected together.

3Resolver Reference two (EXC) is 180° phase advanced with respect to Resolver

Reference one (EXC).

PIN CONFIGURATION

3 2 1 20 19

NC 4

SIN 5

DGND 6

COS 7

NC 8

AD2S99

TOP VIEW

(Not to Scale)

18 EXC

17 EXC

16 AGND

15 NC

14 NC

9 10 11 12 13

NC = NO CONNECT

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection.

Although the AD2S99 features proprietary ESD protection circuitry, permanent damage may

occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD

precautions are recommended to avoid performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE

REV. B

–3–

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