AD2S99
PIN DESIGNATIONS
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
Pin
No.
Mnemonic
Description
1
SEL2
SEL1
FBIAS
SIN
Frequency Select 2
Frequency Select 1
2
3
External Frequency Adjust Pin
Resolver Output SIN
5
61
DGND
COS
Digital Ground
*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.
7
Resolver Output COS
Synthesized Reference Output
10
11
SYNREF
LOS
Indicates When Both the SIN and
COS Are Below the Threshold.
12
161
VDD
Positive Power Supply
Analog Ground
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
AGND
EXC
EXC
VSS
17
Resolver Reference One
Resolver Reference Two3
Negative Power Supply
Negative Power Supply
18
192
202
VSS
ORDERING GUIDE
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).
Model
Temperature Range
Package Option*
AD2S99AP
AD2S99BP
–40°C to +85°C
–40°C to +85°C
P-20A
P-20A
PIN CONFIGURATION
*P = PLCC.
3
2
20 19
1
NC
SIN
4
5
6
7
8
18 EXC
EXC
17
16 AGND
NC
AD2S99
TOP VIEW
(Not to Scale)
DGND
COS
NC
15
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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