DR-11525
16-BIT HIGH FREQUENCY HYBRID
DIGITAL-TO-RESOLVER D/R CONVERTER
DESCRIPTION
The DR-11525 is a versatile multiply-
ing digital-to-resolver converter. The
digital input represents an angle, and
the output is resolver type, sin/cos.
The reference input will accept any
waveform, even a sawtooth for CRT
drive. Because the reference is dc-
coupled to the output, the DR-11525
can be used as: a digital-to-resolver
converter using a sinusoidal refer-
ence as an input; a digital-to-sin/cos
dc converter using a dc reference; or
a polar-to-rectangular converter using
a reference input proportional to the
radius vector; or a rotating cartwheel
sweep generator for PPI displays
using a sawtooth reference.
Packaged in a 36-pin DDIP, the DR-
11525 is a complete D/R converter in
one hybrid module. Hybrid technology
results in low weight, low power con-
sumption, very high reliability, and a
wide operating temperature range. The
DR-11525 circuit design allows for high-
er accuracy and reduces the output
scale factor variation so that the output
can drive displays directly. The output
line-to-ground voltage can be scaled by
external resistors. The DR-11525 also
includes high ac and dc common mode
rejection at the reference input
FEATURES
鈥?/div>
Accuracy Up to 1 Minute
鈥?/div>
Operational Up to 10 kHz
鈥?/div>
2 Vrms, 6.81 Vrms, 11.8 V
L
-
L
, or
Scalable Resolver Outputs
APPLICATIONS
Because of its high reliability, small size
and low power consumption, the hybrid
DR-11525 is ideal for the most stringent
and severe industrial and military
ground or avionics applications. All units
are available with MIL-PRF-38534 pro-
cessing as a standard option.
Among the many possible applica-
tions are computer-based systems in
which digital angle information is
processed, such as synchro/resolver
simulators, flight trainers, flight instru-
mentation, fire control systems, IR,
radar and navigation systems. In addi-
tion, the DR-11525 is ideal for motor
and robotic control test systems.
鈥?/div>
2 mA rms Output
鈥?/div>
16-Bit Resolution
鈥?/div>
8-Bit/2-Byte Double Buffered
Transparent Latches
Any Waveform
鈥?/div>
DC-Coupled Reference Accepts
鈥?/div>
High-Rel CMOS D/R Chip
鈥?/div>
No +5 V Supply Required
TEST POINT - R
REFERENCE INPUTS
13.37 k
36.71 k
49.92 k
D/R CONVERTER
DIFFERENTIAL
(NOTE 1)
26 V
13.37 k
36.71 k
49.92 k
HIGH ACCURACY
LOW SCALE FACTOR
VARIATION
REFERENCE
CONDITIONER
BITS 1-16
+S
S1
+C
S2
RESOLVER SCALING
OUTPUT AMPLIFIERS
RESOLVER
OUTPUTS
S3
S4
SINGLE-ENDED
(NOTE 2)
26 V
TRANSPARENT
LATCH
TRANSPARENT
LATCH
ADJUSTABLE
(NOTE 3)
4.4 V
LA
LM
BITS 1-8
BITS 9-16
LL
DIGITAL INPUT
NOTES: 1) 26 VRMS REFERENCE IN = 11.8 V
L-L
DIFFERENTIAL OUTPUT
2) 26 VRMS REFERENCE IN = 6.8 VRMS SINGLE-ENDED OUTPUT
3) 4.4 VRMS REFERENCE IN = 2 VRMS SINGLE-ENDED OUTPUT
FIGURE 1. DR-11525 BLOCK DIAGRAM
漏
1996, 1999 Data Device Corporation
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