AD2S81A/AD2S82A
RECOMMENDED OPERATING CONDITIONS
ABSOLUTE MAXIMUM RATINGS
1
(with respect to GND)
Power Supply Voltage (+V
S
to –V
S
) . . . . . . . . .
±
12 V dc
±
10%
Power Supply Voltage V
L
. . . . . . . . . . . . . . . . . . +5 V dc
±
10%
Analog Input Voltage (SIN and COS) . . . . . . . . 2 V rms
±
10%
Analog Input Voltage (REF) . . . . . . . . . . . . . . 1 V to 8 V peak
Signal and Reference Harmonic Distortion . . . . . . . 10% (max)
Phase Shift Between Signal and Reference .
±
10 Degrees (max)
Ambient Operating Temperature Range
Commercial (JD) . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
Industrial (HP, JP, KP, LP) . . . . . . . . . . . . –40°C to +85°C
PIN FUNCTION DESCRIPTIONS
Description
Reference Signal Input
Demodulator Input
Ratio Multiplier Output
Cosine Input
Power Ground
Resolver Signal Ground
Sine Input
Positive Power Supply
Parallel Output Data
Logic Power Supply
Logic Hi-Output Data in High Impedance
State Logic Lo Present Data to the Output Latches
BYTE SELECT
Logic Hi-Most Significant Byte to DB1–DB8
Logic Lo-Most Significant Byte to DB1–DB8
INHIBIT
Logic Lo Inhibits Data Transfer to Output Latches
DIGITAL GND
Digital Ground
SC1–SC2*
Select Converter Resolution
DATA LOAD*
Logic Lo DB1–DB16 Inputs
Logic Hi DB1–DB16 Outputs
BUSY
Converter Busy, Data Not Valid While Busy Hi
DIR
Logic State Defines Direction of Input Signal Rotation
RIPPLE CLK
Positive Pulse when Converter Output Changes from
1s to All 0s or Vice Versa
–V
S
Negative Power Supply
VCO I/P
VCO Input
INTEGRATOR I/P Integrator Input
INTEGRATOR O/P Integrator Output
DEMOD O/P
Demodulator Output
COMPLEMENT*
Active Logic Lo
VCO O/P*
VCO Output
*AD2S82A Only.
Mnemonic
REFERENCE I/P
DEMOD I/P
AC ERROR O/P
COS I/P
ANALOG GND
SIGNAL GND
SIN I/P
+V
S
DB1–DB16
+V
L
ENABLE
+V
S2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +14 V dc
–V
S
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –14 V dc
+V
L
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +V
S
Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +14 V to –V
S
SIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +14 V to –V
S
COS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +14 V to –V
S
Any Logical Input . . . . . . . . . . . . . . . . . . . –0.4 V dc to +V
L
dc
Demodulator Input . . . . . . . . . . . . . . . . . . . . . . . +14 V to –V
S
Integrator Input . . . . . . . . . . . . . . . . . . . . . . . . . . +14 V to –V
S
VCO Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +14 V to –V
S
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 860 mW
Operating Temperature
Commercial (JD) . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
Industrial (HP, JP, KP, LP) . . . . . . . . . . . . . –40°C to +85°C
Storage Temperature (All Grades) . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . +300°C
CAUTION
1. Absolute Maximum Ratings are those values beyond which damage to the
device may occur.
2. Correct polarity voltages must be maintained on the +V
S
and –V
S
pins.
AD2S81A/AD2S82A PIN CONFIGURATIONS
REFERENCE I/P
DEMOD I/P
AC ERROR O/P
COS I/P
ANALOG GND
SIN I/P
+V
S
MSB DB1
DB2
DB3
DB4
1
2
3
4
5
6
7
28
DEMOD O/P
27
INTEGRATOR O/P
26
INTEGRATOR I/P
25
VCO I/P
24
–V
S
AD2S81A
23
RIPPLE CLK
TOP VIEW
22
DIR
(Not to Scale)
21
8
BUSY
9
10
11
20
DIGITAL GND
19
INHIBIT
18
BYTE SELECT
17
DB5
12
DB6
13
DB7
14
INTEGRATOR O/P
REFERENCE I/P
DEMOD O/P
ENABLE
16
+V
L
15
DB8 LSB
Bit Weight Table
Binary
Bits (N)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Resolution Degrees
(2
N
)
/Bit
1
2
4
8
16
32
64
128
256
512
1024
2048
4096
8192
116384
32768
65536
131072
262144
360.0
180.0
90.0
45.0
22.5
11.25
5.625
2.8125
1.40625
0.703125
0.3515625
0.1757813
0.0878906
0.0439453
0.0219727
0.0109836
0.0054932
0.0027466
0.0013733
Minutes
/Bit
21600.0
10800.0
5400.0
2700.0
1350.0
675.0
337.5
168.75
84.375
42.1875
21.09375
10.546875
5.273438
2.636719
1.318359
0.659180
0.329590
0.164795
0.082397
Seconds
/Bit
1296000.0
648000.0
324000.0
162000.0
81000.0
40500.0
20250.0
10125.0
5062.5
2531.25
1265.625
632.8125
316.40625
158.20313
79.10156
39.55078
19.77539
9.88770
4.94385
DEMOD I/P
INTEGRATOR I/P
VCO O/P
SIGNAL GND
ANALOG GND
COS I/P
AC ERROR O/P
6
5
4
3
2
1 44 43 42 41 40
PIN 1
IDENTIFIER
VCO I/P
39
–V
S
38
RIPPLE CLK
37
DIR
36
BUSY
35
DATA LOAD
34
COMPLEMENT
33
SC2
32
SC1
31
DIGITAL GND
30
INHIBIT
29
NC
SIN O/P
7
+V
S 8
NC
9
MSB DB1
10
DB2
DB3
DB4
DB5
11
12
13
14
AD2S82A
TOP VIEW
(Not to Scale)
DB6
15
DB7
16
DB8
17
18 19 20 21 22 23 24 25 26 27 28
NC = NO CONNECT
REV. B
–5–
LSB DB16
+V
L
ENABLE
BYTE
SELECT
DB10
DB11
DB12
DB13
DB14
DB15
DB9
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