AD2S1200WSTZ Analog Devices Inc, AD2S1200WSTZ Datasheet - Page 19

• Manufacturer Part Number: AD2S1200WSTZ
• Description: IC R/D CONV W/REF OSCIL 44-LQFP
• Manufacturer: Analog Devices Inc
• Type: R/D Converterr

Specifications of AD2S1200WSTZ

• Resolution (bits): 12 b
• Data Interface: Serial, Parallel
• Voltage Supply Source: Analog and Digital
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 44-LQFP
• Input Channel Type: Differential
• Supply Voltage Range - Analog: 4.75V To 5.25V
• Supply Voltage Range - Digital: 4.75V To 5.25V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-AD2S1200CBZ - BOARD EVAL FOR AD2S1200
• Sampling Rate (per Second): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

–100
–120
–140
–160
–180
–200
–10
–15
–20
–25
–30
–35
–40
–45
–20
–40
–60
–80
–0
–5
20
18
16
14
12
10
5
8
6
4
2
0
0
1
0
1
Figure 12. RDC System Magnitude Response
Figure 13. RDC System Phase Response
Figure 14. RDC Small Step Response
10
10
1
FREQUENCY (Hz)
FREQUENCY (Hz)
100
100
2
TIME (ms)
1k
1k
3
10k
10k
4
100k
100k
5
Rev. 0 | Page 19 of 24
SOURCES OF ERROR
Acceleration
A tracking converter employing a Type II servo loop does not
suffer any velocity lag. There is, however, an error associated
with acceleration. This error can be quantified using the
acceleration constant (K
Conversely,
Figure 15 shows tracking error versus acceleration for the
AD2S1200.
The numerator and denominator’s units must be consistent. The
maximum acceleration of the AD2S1200 has been defined as
the acceleration that creates an output position error of 5°
(when LOT is indicated). The maximum acceleration can be
calculated as
The AD2S1200 will be able to withstand the maximum
acceleration of 103,000 rps
reaching its maximum tracking rate of 1,000 rps.
Maximum
10
9
8
7
6
5
4
3
2
1
0
0
Tracking
Accelerati
Figure 15. Tracking Error vs. Acceleration
40k
K
103
a
Error
=
, 1
a
on
ACCELERATION (rps
) of the converter.
000
,
Input
000
2
80k
Tracking
=
for approximately 10 ms before
(
=
(
K
rps
rps
Input
Accelerati
a
360
(sec
)
2
)
(
120k
°
Error
≅
Accelerati
−
/
2
rev
10
K
)
2
a
×
)
on
ms
)
5
°
160k
≅
on
103
AD2S1200
,
000
200k
rps
2