Datasheet
REV. B
–3–
AD2S99
ABSOLUTE MAXIMUM RATINGS*
V
DD
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7 V
V
SS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –7 V
Operating Temperature . . . . . . . . . . . . . . . . . .–40°C to +85°C
Storage Temperature . . . . . . . . . . . . . . . . . . .–65°C to +150°C
Analog Input Voltages (SIN and COS) . . . . . . . . . V
SS
– 0.3 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .to V
DD
+ 0.3 V
Frequency Select (SEL1, SEL2) . . . . . . . . . . . . . . V
SS
– 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 (V
DD
to V
SS
) . . . . . . ±4.75 V to ±5.25 V
Analog Input Voltage (SIN and COS) . . . . . . . . 2 V rms ±10%
Frequency Select (SEL1 and SEL2) . . . . . . . . . V
SS
to AGND
Operating Temperature Range . . . . . . . . . . . . . –40°C to +85°C
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
6
1
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 V
DD
Positive Power Supply
16
1
AGND Analog Ground
17 EXC Resolver Reference One
18
EXC Resolver Reference Two
3
19
2
V
SS
Negative Power Supply
20
2
V
SS
Negative Power Supply
NOTES
1
Pins 6 and 16 must be connected together.
2
Pins 19 and 20 must be connected together.
3
Resolver Reference two (EXC) is 180° phase advanced with respect to Resolver
Reference one (EXC).
PIN CONFIGURATION
NC = NO CONNECT
NC
SIN
NC
DGND
COS
FBIAS
SEL1
V
SS
SEL2
V
SS
NC
SYNREF
NC
LOS
V
DD
EXC
NC
AGND
NC
193
1
2 20
4
5
8
6
7
12 1391110
18
17
14
16
15
TOP VIEW
(Not to Scale)
AD2S99
EXC
ORDERING GUIDE
Model Temperature Range Package Option*
AD2S99AP –40°C to +85°C P-20A
AD2S99BP –40°C to +85°C P-20A
*P = PLCC.
WARNING!
ESD SENSITIVE DEVICE
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.