DR-1 1 8 0 0
1 6 -BIT DIGITAL-TO-RES OLVER CONVERTER
FEATURES
DESCRIPTION
11800 uses high accuracy resistive
ladder networks and solid state
switching to control the attenuation of
the reference voltage. The output
buffer amplifiers allow for up to 2 mA
output drive.
The DR-11800 is a small size, high
accuracy, 16-bit digital-to-sine/cosine
converter. Available in accuracies up
to 1 arc minute, the DR-11800 is con-
tained in a 28-pin, one-square-inch
hermetically sealed package and
requires +15 Vdc and -15 Vdc power
supplies. The reference conditioner
allows for either 115 Vrms or 26 Vrms
reference input for a 6.8 Vrms sin/cos
output. Two registers for the input of
the 16-bit (CMOS/TTL) natural binary
angle data allow for compatibility with
an 8-bit or 16-bit data bus.
28-Pin Square Package
1 Arc Minute Accuracy
0.03% Radius Accuracy
•
•
•
•
Microprocessor Compatible -
8- and 16-Bit
APPLICATIONS
High accuracy, high reliability, small
size, low power consumption and
MIL-PRF-38534 processing avail-
ability, make the DR-11800 suitable
for industrial and military ground or
avionics applications. Possible appli-
cations include digital remote posi-
tioning, resolver angle simulators,
flight trainer, flight instrumentation,
radar and navigational systems, and
PPI displays including moving target
indicators. Other applications are syn-
chro/resolver system development
and test, and wraparound test of syn-
chro/resolver-to-digital converters.
Double-Buffered Inputs
•
•
Pin-Programmable Reference
Input (for 26 and 115 Vrms)
DC-Coupled Reference and
Outputs
Internally, the DR-11800 has a multi-
plying digital-to-sin/cos converter
made of two function generators and
a quadrant select network. Quadrant
information is available from the two
most significant bits. The two function
generators use the remaining angular
data along with the buffered reference
voltage. Similar to a multiplying DAC
(digital-to-analog converter), the DR-
•
•
Requires Only ±15 V Power
Supplies
TTL and CMOS Compatible
•
•
Pin-for-Pin Replacement for
Natel’s HDR2406
+V
–V
S
S
24
25
9
HBE
(MSB) B1
1
2
3
4
5
6
7
8
CK
8-BIT
INPUT
REGISTER
(MSB
BIT 1)
B2
B3
B4
B5
Q1
D
B6
B7
B8
SINθ
28
20
16-BIT
HIGH
ACCURACY
MULTIPLYING
DIGITAL
16-BIT
HOLDING
REGISTER
BUFFER
AMPLIFIERS
B9 11
TO SIN / COS
CONVERTER
12
13
14
15
16
17
B10
B11
B12
B13
COSθ
D
8-BIT
INPUT
REGISTER
B14
B15
BIT 16
(LSB)
Q16
(LSB) B16 18
CK
CK PE
LBE 10
19
LDC
-
+
REFERENCE
CONDITIONER
23
22
21
27
26
GND
RL26
RL115
RH115
RH26
FIGURE 1. DR-11800 BLOCK DIAGRAM
1996, 1999 Data Device Corporation
©