DRC-11522
TWO-CHANNEL DIGITAL-TO-RESOLVER
CONVERTER
DESCRIPTION
The DRC-11522 is a dual 16-bit digital-
to-resolver (D/R) converter. Each chan-
nel is independent from the other with
the exception of the 16 digital lines.
The DRC-11522 allows the user to pro-
gram the gain of the resolver output.
Packaged in a 36-pin double DIP, the
DRC-11522 is two digital-to-resolver
converters in one hybrid module.
Using an AC reference input, the DRC-
11522 is a digital-to-resolver convert-
er. When using a DC reference input,
the unit can be used as a hybrid digital-
to-sin/cos DC converter. With the refer-
ence input proportional to the radius
vector, the DRC-11522 converts polar
to rectangular coordinates.
The circuit design in the DRC-11522
allows for higher accuracy and
reduces the output scale factor varia-
tion so that the output can drive dis-
SIN A
COS A
OUTPUT
AMPLIFIERS
OUTPUT
AMPLIFIERS
FEATURES
plays directly. The output line-to-line
voltage can be scaled by pin program-
ming. Other features include buffered
reference input, and a wide operating
temperature range.
•
16-Bit Resolution
•
Pin Programmable Gain Control
•
Two Channels in One 36-Pin DDIP
•
Accuracy: to ±2 Min.
•
0.1% Scale Factor Variation with
Angle
APPLICATIONS
Because of its high reliability, small
size and low power consumption, the
DRC-11522 is ideal for the most strin-
gent and severe industrial and military
ground or avionics applications. All
units are available with MIL-PRF-
38534 processing.
Among the many possible applications
are computer-based systems in which
digital information is processed, such
as simulators, flight trainers, flight
instrumentation, fire control systems,
radar and navigation systems.
•
DC-Coupled Reference
•
High Reliability CMOS D/R Chip
•
8-Bit/2-Byte Double-Buffered
Transparent Latches
SIN B
COS B
REFERENCE CONDITIONER
+C
-
REF
+
GC1-A
D/R CONVERTER
HIGH ACCURACY
LOW SCALE FACTOR
VARIATION
D/R CONVERTER
HIGH ACCURACY
LOW SCALE FACTOR
VARIATION
+S
+C
+S
REFERENCE CONDITIONER
-
REF
+
GC1-B
GC2-A
GC2-B
TRANSPARENT
LATCH
TRANSPARENT
LATCH
TRANSPARENT
LATCH
TRANSPARENT
LATCH
LA-A LM-A
LL-A LL-B
LM-B LA-B
+15 V
-15 V
GND
DIGITAL INPUT
FIGURE 1. DRC-11522 BLOCK DIAGRAM
©
1988, 1999 Data Device Corporation
TABLE 1. SPECIFICATIONS
(for each channel)
Apply over temperature range, power supply ranges, reference voltage, and frequency range, and 10% harmonic distortion in the reference.
PARAMETER
RESOLUTION
ACCURACY
Output Accuracy
Differential Linearity
Radius accuracy
DYNAMICS
Output Settling Time
DIGITAL INPUT
Logic Type
VALUE
16 bits (0.33 arc minutes)
±8 minutes to ±1 minute
(see ordering info)
±1 LSB max
±0.03%
DESCRIPTION/REMARKS
MSB = 180° LSB = 0.0055°
Accuracy applies over operating temp. range
Simultaneous amplitude variation in both
outputs as a function of digital angle
For any analog or digital step change
Natural binary angle parallel positive logic CMOS
and TTL compatible.
Inputs are CMOS transient protected. Each input
has a 20 µA max pull down to GND.
Less than 20 µsec for any digital step change.
Logic “0”
Logic “1”
Load Current
REFERENCE INPUT
Type
Frequency Range
Voltage
Input Impedance
ANALOG OUTPUT
Type
Output Current
Max Output Voltage (Tracks
Reference Input Voltage)
Converter Gain (K)
Transformation Ratio Tol.
Scale Factor Variation
DC Offset
POWER SUPPLIES
Voltage
Max Voltage Without Damage
Current or Impedance
TEMPERATURE RANGES
(CASE)
Operating
-1 Option
-3 Option
Storage
PHYSICAL CHARACTERISTICS
Type
Size
Weight
-0.3 V-dc to 1.25 V-dc
+2.0 V-dc to +5.5 V-dc
20 µA max to GND
20 µA to V
L
External logic voltage not needed. TTL compatible.
Bits 1-16
LL, LM, LA (See timing Diagram, FIGURE 2)
Programmable (See TABLE 2.)
DC to 10 kHz with reduced accuracy.
0 to ±10 peak AC or DC
Operational Amplifier Buffer
Resolver
DC to 1000 Hz
3.5 V ±10%
10 M Ohm min
2 mA rms max
K * Vin * Sin
θ
also K * Vin * Cos
θ
0.5, 1.0, or 2.0 ±1%
±0.2% max
±0.1% max
±10 mV typical, ±25 mV max
±15 VDC ±10%
±18 VDC
±40 mA max
±10 V peak AC or DC
See TABLE 2.
Each Line to GND
For ±10 V peak output
-55°C to +125°C
0°C to +70°C
-60°C to +135°C
36-pin double DIP
0.78 x 1.9 x 0.21 inch
(2.0 x 4.8 x 0.53 cm)
0.6 oz (17g) max
2
TECHNICAL INFORMATION
DIGITAL INPUTS
For each channel, the 16-bit digital angle is double buffered with
transparent latches (See FIGURE 1). The latch controls have
internal pull-up current sources to +5 V, this puts the latches in
the transparent mode when they are not connected.
Angle is determined by adding the logic bits. The enable inputs
are LL (1st Latch LSBs), LM (1st Latch MSBs), and LA (2nd
Latch All); see FIGURE 2 for timing.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
PIN
LL-B
COS A
SIN A
GC1-B
GC2-B
Ref B
GC1-A
GC2-A
Ref A
COS B
SIN B
NC
+15 V
-15 V
LA-B
LA-A
LL-A
GND
TABLE 3. PINOUTS
FUNCTION
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
PIN
FUNCTION
Bit 16 (LSB)
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1 (MSB)
LM-A
LM-B
OUTPUT SCALING AND REFERENCE LEVEL
ADJUSTMENT
The DRC-11522 operates like a multiplying D/A converter in that
the voltage of each output line is directly proportional to the ref-
erence voltage. The maximum line-to-line levels are determined
by the output amplifiers and are programmable for a gain of 0.5,
1.0, or 2.0 (See TABLE 2.).
TABLE 2. PROGRAMMABLE GAIN
GC1-A
(PIN 7)
GND
OPEN
OPEN
GC1-B
(PIN 4)
GC2-A
(PIN 8)
OPEN
GND
OPEN
GC2-B
(PIN 5)
GAIN
(K)
0.5
1.0
2.0
GAIN
(K)
NOTE: Functions LL, LM, LA both A and B may be left unconnected
when not used.
TABLE 4. PIN DEFINITIONS
PIN
GND
DEFINITION
Power Supply Ground
Digital Ground
Analog Signal Ground
Digital Input bits B1, = MSB = 180 degrees
High Byte Enable (B1-B8) for MSB’s 8-bit Input register of
channel A. Logic high enables, low holds.
High Byte Enable (B1-B8) for MSB’s 8-bit Input register
channel B Logic high enables, low holds.
Low Byte Enable (B9-B16) for LSB’s 8-bit Input register of
channel A. Logic high enables, low holds
Low Byte Enable (B9-B16) for LSB’s 8-bit Input register of
channel B. Logic high enables, low holds.
Channel A Load Converter. Logic high transfers Channel A
input registers data into 16-bit holding register. When
low, Channel A is in hold mode.
Channel B Load Converter. Logic high transfers Channel B
input registers data into 16-bit holding register. When
low, Channel B is in hold mode.
Power Supply Voltage.
Power Supply Voltage.
CAUTION:
REVERSAL OF POWER SUPPLIES
WILL DAMAGE THE CONVERTER.
Channel A reference voltage Input
Channel B reference voltage input
Channel A gain programming pin
Channel A gain programming pin
Channel B gain programming pin
Channel B gain programming pin
Analog output of Channel A
Analog output of Channel A
Analog output of Channel B
Analog output of Channel B
B1-B16
LM-A
LM-B
OUTPUT PHASING AND OUTPUT SCALE FACTOR
The analog output signals have the following phasing:
LL-A
LL-B
LA-A
sin = (REF * K) Ao [1 + A(θ)] sin
θ
cos = (REF * K) Ao [1 + A(θ)] cos
θ
The output amplifiers simultaneously track reference voltage
fluctuations because they are proportional to (REF * K). The
transformation ratio Ao is determined by the programmable gain
inputs (0.5, 1.0, or 2.0). The maximum variation in Ao from all
causes is 0.1%. The term A(θ) represents the variation of the
amplitude with the digital signal input angle. A(θ), which is called
the scale factor variation, is a smooth function of (θ) without dis-
continuities and is less than ±0.1% for all values of (θ) The total
maximum variation in Ao[1 + A(θ)] is therefore ±0.2%.
Because the amplitude factor (REF * K) Ao [1 + A(θ)] varies
simultaneously on all output lines, it is not a source of error when
the DRC-11522 is driving a ratiometric system. However, if the
outputs are used independently, as in x-y plotters, the amplitude
variations must be taken into account.
LA-B
+15 V
-15 V
Ref-A
Ref-B
GC1-A
GC2-A
GC1-B
GC2-B
Sin A
Cos A
Sin B
Cos B
3
200 ns min.
TRANSPARENT
LATCHED
DATA 1-16 BITS
;;;;
;;;;;
50 ns min.
100 ns min.
FIGURE 2. LL, LM, AND LA TIMING DIAGRAM
DOT
IDENTIFIES
PIN 1
1.700 ±0.005
(43.2 ±0.13)
0.09 ±0.01
(2.3 ±0.25)
0.775 ±0.005
(19.7 ±0.13)
BOTTOM VIEW
0.600 ±0.005
(15.2 ±0.13)
0.10 ±0.01
(2.5 ±0.3)
1.895 ±0.005
(48.1 ±0.13)
0.21 MAX
(5.3)
SEATING
PLANE
SIDE VIEW
0.086 TYP
RADIUS
0.015 MAX
(0.39)
0.25 MIN
(6.4)
0.055 (1.4)
RAD TYP
0.100 TYP(2.54)
TOL. NON-
CUMULATIVE
0.018 (0.46)
DIAM TYP
Notes:
1. Dimensions shown are in inches (millimeters)
2. Lead identification numbers are for reference only.
3. Lead cluster shall be centered within ±0.010 (±2.54) of outline dimensions.
Lead spacing dimensions apply only at seating plane.
4. Pin material meets solderability requirements of MIL-STD-202E, Method 208C.
5. Package is Kovar with electroless nickel plating.
6. Case is electrically floating.
FIGURE 3. DRC-11522 MECHANICAL OUTLINE (36-PIN DOUBLE DIP)
4
ORDERING INFORMATION
DRC-11522-X X X X
Supplemental Process Requirements:
S = Pre-Cap Source Inspection
L = Pull Test
Q = Pull Test and Pre-Cap Inspection
K = One Lot Date Code
W = One Lot Date Code and PreCap Source
Y = One Lot Date Code and 100% Pull Test
Z = One Lot Date Code, PreCap Source and 100% Pull Test
Blank = None of the Above
Accuracy:
3 = ±4 minutes
4 = ±2 minutes
Process Requirements:
0 = Standard DDC Processing, no Burn-In (See table below.)
1 = MIL-PRF-38534 Compliant
2 = B*
3 = MIL-PRF-38534 Compliant with PIND Testing
4 = MIL-PRF-38534 Compliant with Solder Dip
5 = MIL-PRF-38534 Compliant with PIND Testing and Solder Dip
6 = B* with PIND Testing
7 = B* with Solder Dip
8 = B* with PIND Testing and Solder Dip
9 = Standard DDC Processing with Solder Dip, no Burn-In (See table below.)
Temperature Grade/Data Requirements:
1 = -55°C to +125°C
2 = -40°C to +85°C
3 = 0°C to +70°C
4 = -55°C to +125°C with Variables Test Data
5 = -40°C to +85°C with Variables Test Data
8 = 0°C to +70°C with Variables Test Data
*Standard DDC Processing with burn-in and full temperature test — see table below.
STANDARD DDC PROCESSING
MIL-STD-883
TEST
METHOD(S)
INSPECTION
SEAL
TEMPERATURE CYCLE
CONSTANT ACCELERATION
BURN-IN
2009, 2010, 2017, and 2032
1014
1010
2001
1015, Table 1
CONDITION(S)
—
A and C
C
A
—
5
