DSC-10510 [ETC]
Digital to Synchro Conversion|7 VA DRIVE. BIT OUTPUT ; 数字到同步转换| 7 VA驱动器。位输出\n
| 型号： | DSC-10510 |
| 厂家： | 
ETC |
| 描述： | Digital to Synchro Conversion|7 VA DRIVE. BIT OUTPUT
|
| 文件： | 总12页 (文件大小：112K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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DSC-10510
7 VA DIGITAL-TO-SYNCHRO
CONVERTER
FEATURES
• 7 VA Drive Capability for CT, CDX, or
TR Loads
• Double Buffered Transparent Input
Latch
• 16-Bit Resolution
• Up to 2 Minute Accuracy
• Power Amplifier Uses Pulsating or DC
Supplies
• Built-In-Test (BIT) Output
DESCRIPTION
The DSC-10510M is a high power digital-to-synchro converter, with
16-bit resolution and up to ±2 minute accuracy. The DSC-10510 is
capable of driving multiple Control Transformer (CT), Control Differential
Transmitter (CDX) and Torque Receiver (TR) loads up to 7 VA.
The DSC-10510 contains a high accuracy D/R converter, a triple power
amplifier stage, a walk-around circuit (to prevent torque receiver
hangups), and thermal and over-current protection circuits. The hybrid
is protected against overloads, load transients, over-temperature, loss
of reference, and power amplifier or DC power supply shutdown.
Microprocessor compatibility is provided through a 16-bit/2-byte dou-
ble-buffered input latch. Data input is natural binary angle in TTL
compatible parallel positive logic format.
Packaged in a 40-pin TDIP, the DSC-10510 features a power stage that
may be driven by either a standard ±15 VDC supply or by a pulsating
reference supply when used with an optional power transformer. When
powered by the reference source, heat dissipation is reduced by 50%.
APPLICATIONS
The DSC-10510 can be used where digitized shaft angle data must be
converted to an analog format for driving CT’s, CDX’s, and TR loads.
With its double buffered input latches, the DSC-10510 easily interfaces
with microprocessor based systems such as flight simulators, flight
instrumentation, fire control systems, and flight data computers.
FOR MORE INFORMATION CONTACT:
Technical Support:
1-800-DDC-5757 ext. 7382
Data Device Corporation
105 Wilbur Place
Bohemia, New York 11716
631-567-5600 Fax: 631-567-7358
www.ddc-web.com
©
M
1986, 1999 Data Device Corporation
DDC Custom Monolithics utilized in this product are copyright
under the Semiconductor Chip Protection Act.
+15 VDC
30
-15 VDC
29
+V OR +15 V
23
-V OR -15 V
24
R
REMOTE
SENSE
36
19 S1'
100k
RH
RL
SIN
20 S1
25 S2'
21 S2
26 S3'
22 S3
S1
S2
S3
26 V
REF
18
100k
17
D/R CONVERTER
ELECTRONIC SCOTT-T
& TRIPLE POWER
AMPLIFIER
-R
-
+
HIGH ACCURACY
LOW SCALE FACTOR
VARIATION
COS
13k
35
13k
34
RH'
RL'
3.4 V
REF
DELAY
OVER-CURRENT
POWER STAGE
ENABLE
WALK AROUND CIRCUIT
±15 VDC
- R
39
BIT
THERMAL SENSE
140˚ CASE
TRANSPARENT
LATCH
TRANSPARENT
LATCH
±15 VDC
-R
28
31
33
38
1-8
9-16 32
40
37
LM BITS 1-8
BITS 9-16 LL
K
EN
BS
LA
FIGURE 1. DSC-10510 BLOCK DIAGRAM
TABLE 1. DSC-10510 SPECIFICATIONS
PARAMETER
RESOLUTION
VALUE
DESCRIPTION
16 bits
±2 or 4 minutes
1 LSB max in the 16th bit
40 µs max
Bit 1 = MSB, Bit 16 = LSB
(Note 1)
ACCURACY
DIFFERENTIAL LINEARITY
OUTPUT SETTLING TIME
For any digital input step change (passive loads)
DIGITAL INPUT/OUTPUT
Logic Type
Digital Inputs
TTL/CMOS compatible
All inputs except K
(Kick pin 40)
Logic 0 = 0.8 V max
Logic 1 = 2.0 V min
Loading
K
20 µA max to GND//5pf max Bits 1 - 16, BS, and EN
20 µA max to +5V//5pf max
20 µA max
LL, LM, and LA (CMOS transient protected)
Ground to enable Kick circuit, open to disable; pulls self up to +15V.
Digital Outputs
BIT
Logic 0 for BIT condition (see BIT pin function)
Drive Capability
Logic 0 = 1 TTL Load
Logic 1 = 10 TTL Loads
1.6mA at 0.4V max
0.4mA at 2.8V min
REFERENCE INPUT
Type
26 Vrms differential
3.4 Vrms differential
RH - RL
RH' - RL'
Max Voltage w/o Damage
72.8 Vrms for RH - RL
9.52 Vrms for RH' - RL'
DC to 1 kHz
Frequency
Input Impedance
Single Ended
100k Ohms ±0.5%
13k Ohms ±0.5%
200k Ohms ±0.5%
26k Ohms ±0.5%
RH - RL
RH' - RL'
RH - RL
RH' - RL'
Differential
SYNCHRO OUTPUT
Voltage L-L
Scale Factor Variation
11.8 Vrms ±0.5% for nom Ref V
±0.1% max
Simultaneous amplitude variation on all output lines as a function of digi-
tal angle.
Current
CT, CDX or TR Load
DC Offset
700 mA rms max
7 VA max
±15 mV max
Each line to ground. Varies with angle.
Protection
Output protected from overcurrent, voltage feedback transient, and over
temperature, loss of reference, loss of power amplifier, and loss of ±DC
supply voltage.
POWER SUPPLY CHARACTERISTICS
Nominal Voltage
Voltage Range
±15 V
±5%
±V
20 V peak max,
3 V above output min
25 V
Max Voltage w/o Damage
Current
18V
25 mA max
load dependent
TEMPERATURE RANGES
Operating (Case)
-3XX
-1XX
0°C to +70°C
-55°C to +125°C
-65°C to +150°C
Storage
PHYSICAL CHARACTERISTICS
Size
2.0 x 1.1 x 0.2 inches
(50.8 x 27.9 x 5.1 mm)
0.9 oz
40 Pin Triple DIP
Weight
(25.5 g)
Note 1:
DSC-10510-303 accuracy = ±4 minutes (No Load) + 1.6 minutes at full load (7 VA Inductive)
DSC-10510-304 accuracy = ±2 minutes (No Load) + 1.6 minutes at full load (7 VA Inductive)
Data Device Corporation
www.ddc-web.com
DSC-10510
H-02/02-250
3
INTRODUCTION
It is also recommended that the KICK pin, if unused, be left in the
“No Connection” (N/C) state. The internal pull up will disable the
pin (this removes any unnecessary voltages from the converter).
SYSTEM CONSIDERATIONS:
POWER SURGE AT TURN ON
TORQUE LOAD MANAGEMENT
The output power stages can fully turn on before all the supplies
stabilize, when power is initially applied. Multiple D/S converters
with substantial loads can cause the system power supply to
have difficulty coming up and may even cause the supply to shut
down. It is important that the power supply can handle the turn-
on surge or that the D/S turn-ons be staggered. Typically, the
surge will be twice the max rated draw of the converter.
The above problems are compounded by the high power levels
involved when multiple torque loads (TR) are being driven. In this
configuration, power supply fold back problems are common
unless the stagger technique is used. The load will also need
time to stabilize. On turn-on it is likely that some of output loads
will be at a different angle than the D/S output. As the angular dif-
ference increases so does the power draw until the difference is
180 degrees. At this point the load impedance drops to Zss and
current draw is at a maximum.
POWER SUPPLY CYCLING
Power supply cycling of the DSC-10510 should follow the guide-
lines below to avoid any potential problems.
PULSATING POWER SUPPLIES
D/S and D/R converters have been designed to operate their out-
put power stages with pulsating power to reduce power dissipa-
tion and power demand from regulated supplies. Figures 2 and 3
illustrate this technique. The power output stage is only supplied
with enough instantaneous voltage to be able to drive the
required instantaneous signal level. The AC reference can be full
wave rectified and applied to the push-pull output drivers since
the output signal is required to be in phase with the AC refer-
ence. The supply voltage will be just a few volts more than the
output signal and internal power dissipation is minimized.
Strictly maintain proper sequencing of supplies and signals per
typical CMOS circuit guidelines:
- Apply power supplies first (+15, -15V and ground).
- Apply digital control signals next.
- Apply analog signals last.
The reverse sequence should be followed during power down of
the circuit.
6
3.4V rms
7
1
2
3
REFERENCE
SOURCE
21.6V rms
C.T.
4
+DC SUPPLY LEVEL
+v
RL' RH'
+V
S1'
S1
26V rms 400Hz
POSITIVE PULSATING
SUPPLY VOLTAGE
+
+
S1
T1
D2
D3
D1
D4
C1
C2
42359
S2'
S2
5
GND
S2
S3
AMPLIFIER OUTPUT
VOLTAGE ENVELOPE
S3'
S3
-V
DSC10510
NEGATIVE PULSATING
SUPPLY VOLTAGE
DIGITAL ±15VDC
INPUT
-DC SUPPLY LEVEL
- v
NOTES:
PARTS LIST FOR 400Hz
D1, D2, D3, D4 = 1N4245
C1 AND C2 = 47µF, 35V DC CAPACITOR
FIGURE 2. TYPICAL CONNECTION DIAGRAM
UTILIZING PULSATING POWER SOURCE
FIGURE 3. PULSATING POWER SUPPLY VOLTAGE
WAVEFORMS
Data Device Corporation
www.ddc-web.com
DSC-10510
H-02/02-250
4
current therefore is 7VA/10.2 V = 0.68 A rms. The output is L-L
push-pull, that is, all the current flows from the positive supply
out to the load and back to the negative supply. The power input
is the DC voltage times the average current or 30 V x (0.68 A x
0.635/0.707) [avg/rms] = 18.32 Watts.
+15VDC
LIGHT LOAD
HEAVY LOAD
The power dissipated by the output driver stage is over 18 Watts
shared by the six power transistors. Since one synchro line sup-
plies all the current while the other two share it equally, one will
dissipate 2/3 of the power and the other two will each dissipate
1/3. There are 2 transistors per power stage so each of the two
transistors dissipates 1/3 of the power and the other transistors
dissipate 1/6 of the power. This results in a maximum power in
any one transistor of 1/3 x 18.32 W = 6.04 Watts. The heat rise
from the junction to the outside of the package, assuming a ther-
mal impedance of 4°C per watt = 24.16°C. At an operating case
temperature of 125°C the maximum junction temperature will be
149.16°C.
-15VDC
FIGURE 4. LOADED WAVEFORMS
THERMAL CONSIDERATIONS
Power dissipation in D/S and D/R circuits is dependent on the
load, whether active (TR) or passive (CT or CDX), and the power
supply, whether DC or pulsating. With inductive loads virtually all
the power consumed will have to be dissipated in the output
amplifiers. This can require considerable care in heat sinking.
Example:
The other extreme condition to consider is when the output volt-
age is 11.8 V. The current then will be 0.42 Amps and the power
will be 30 x (0.42A x 0.635/0.707) = 11.32 Watts. A similar cal-
culation will show the maximum power per transistor to be 2.3
Watts. This is much less than when the output voltage is 10.2 V.
For illustrative purposes the following thermal calculations are
made using the DSC-10510’s specifications. The DSC-10510
has a 7 VA drive capability for CT, CDX, or TR loads.
Simplest case first: Passive Inductive Load and ±15 Volt DC
power stage supplies (as shown in Figure 2). The power dis-
sipated in the power stage can be calculated by taking the inte-
gral of the instantaneous current multiplied by the voltage differ-
ence from the DC supply that supplies the current and instanta-
neous output voltage over one cycle of the reference. For an
inductive load this is a rather tedious calculation. Instead take the
difference between the power input from the DC supplies minus
the power delivered to the load. An actual synchro load is highly
inductive with a Q of 4-6; therefore assume that it is purely reac-
tive. The power out, then, is 0 Watts. As a worst case scenario,
also assume the load is the full 7 VA, the converter’s rated load.
For Pulsating Supplies the analysis is much more difficult.
Calculations for a purely reactive load with DC supplies equal to
the output voltage peak vs. pulsating supplies with a supply volt-
age equal to the output voltage yield an exact halving of the
power dissipated. At light loads the pulsating supplies approxi-
mate DC supplies and at heavy loads, which is the worst case,
they approximate a pulsating supply as shown in Figure 4.
Advantages of the pulsating supply technique are:
• Reduced load on the regulated ±15 VDC supplies
• Halving of the total power
The VA delivered to the load is independent of the angle but the
voltage across the synchro varies with the angle from a high of
11.8 Volts line-to-line (L-L) to a low of 10.2 V L-L. The maximum
• Simplified power dissipation management
2-WIRE REF
3-WIRE SYNCHRO
R1=2/3Ω
R2=1 1/3Ω
R1
R2
R1
R2
REF
ZSO=8.6Ω
D/S
REF IN
REF
REF
ACTIVE LOAD
TORQUE TRANSMITTER
TORQUE RECEIVER
NOTES:
R1 + R2 ZSS
FIGURE 5. EQUIVALENT 2-WIRE CIRCUIT
FIGURE 6. TORQUE SYSTEM
Data Device Corporation
www.ddc-web.com
DSC-10510
H-02/02-250
5
smaller angular steps, so the torque system is always at or near
null. Large digital steps, load disturbances, a stuck torque receiv-
er or one synchro line open, however, cause an off null condition.
11/3Ω
2/3Ω
2Ω
RH
At null the load current could be zero (See Figure 9 ). If Vac =
Vab, both in magnitude and phase, then, when “a” is connected
to “b,” no current will flow. Pick C1 and C2 to match the phase
lead of R1 – Zso. In practice this ideal situation is not realized.
The input to output transformation ratio of torque receivers is
specified at 2% and the turns ratio at 0.4%. The in-phase current
flow due to this nominal output voltage (10.2 V) multiplied by the
% error (2.4/100) divided by total resistance (4 Ohms) = 61mA.
A phase lead mismatch between the torque receiver and the
converter of 1 degree results in a quadrature current of 10.2 V x
sin 1°/4 Ohms = 44.5 mA. Total current is the phaser sum 61 +
44.5 = 75.5 mA. Power dissipation is 30 VDC x 75.5 mA rms x
0.9 (avg/rms) = 2.04 Watts. Since this is a light load condition,
even pulsating supplies would be approximating DC supplies.
D/S
ZSO=8.6Ω
REF
REF IN
RL
TORQUE LOAD WITH DISCRETE EXTERNAL RESISTOR
FIGURE 7. D/S EQUIVALENT
ACTIVE LOAD
Active loads (torque receivers) make it more difficult to calculate
power dissipation. The load is composed of an active part and a
passive part. Figure 5 illustrates the equivalent two wire circuit.
At null, when the torque receiver’s shaft rotates to the angle that
minimizes the current in R2, the power dissipated is at its lowest.
The typical ratio of Zso/Zss = 4.3. For the maximum specified
load of Zss = 2 ohm, the Zso = 2 x 4.3 = 8.6 ohms. Also, the typ-
ical ratio of R2/R1= 2.
The off null condition power dissipation is quite different. Actual
synchros have no current limiting, so the circuit current is the cur-
rent that the circuit conditions demand. The worst case would be
for a 180 degree error between the two synchros as shown in
Figure 10. For this condition the two equivalent voltage sources
are 10.2 V opposing. The current is (10.2 x 2) / 4 = 5.1 A in
phase.
In synchro systems with a torque transmitter driving a torque
receiver, the actual line impedances are as shown in Figure 6.
The torque transmitter and torque receiver are electrically identi-
cal, so that the total line impedance is double that of Figure 5.
The torque system is designed to operate this way. The higher
the total line impedances, the lower the current flow at null and
the lower the power dissipation. It is recommended that with
torque loads, discrete resistors be used as shown in Figures 7
and 8.
The power dissipated in the converter is the power supplied by
the ±15 VDC supplies minus the power delivered to the load (30
V x 5.1 A x 0.9) - (10.2 V x 5.1 A) = 87.7 Watts for DC supplies.
This requires a large power supply and high wattage resistors.
The converter output current is typically limited (in the DSC-
10510 case to 0.8 A peak). This limits the power supply to more
reasonable values but introduces another problem – the torque
receiver can hang up in a continuous current limited condition at
a false stable null. The DSC-10510 has special circuits that
sense this continuous current overload condition and sends a
A torque load is normally at null. Once the torque receiver nulls
at power turn on, the digital commands to the D/S are typically in
R1
1.33Ω
2Ω
1 1/3Ω
2/3Ω
S1
S2
S3
C1
C2
S1
S2
RH
RL
RH
RL
A
C
B
1.33Ω
1.33Ω
Zso=8.6Ω
REF
D/S
REF IN
D/S
TR
REF IN
REF
S3
FIGURE 8. D/S - ACTUAL HOOK-UP
FIGURE 9. IDEAL NULL CONDITION
Data Device Corporation
www.ddc-web.com
DSC-10510
H-02/02-250
6
+15V
An additional advantage of using pulsating power supplies is that
the loss of reference when driving torque loads is fail safe. The
load will pump up the ±V voltage through the power stage clamp
diodes and the loss of the reference detector will disable the
power stage. The power stage will be turned off with the required
power supply voltages. The pulsating power supply diodes will
isolate the pumped up pulsating supplies from the reference. If
the DC power supplies are to be used for the power stage, and
there is a possibility of the DC supplies being off while the refer-
ence to the torque receiver is on, then the protection circuitry
shown in Figure 11 is highly recommended.
2Ω
2Ω
10.2V
10.2V
D/S
- 15V
FIGURE 10. WORST CASE 180° ERROR
A remote sense feature is incorporated in DDC’s DSC-10510
hybrid digital-to-synchro converter. Rated at 7 VA, it offers accu-
racies to ±2 minutes of arc at the load.This remote sense feature
operates just as other precision sources do. A separate line is
run to each leg of the synchro (in addition to the drive line) to
sense the voltage actually appearing on the load. This is then
used to regulate the output based on load voltage rather than
converter output voltage. This feature is very useful in driving
heavy passive loads in precision systems.
momentary 45° “kick” to the torque receiver thus knocking it off
the false null. The torque receiver will then swing to the correct
angle and properly null. If the torque receiver is stuck it will not
be able to swing off the over-current condition. In this case the
converter will send a BIT signal when the case temperature
exceeds 140°C. This BIT signal can be used to shut down the
output power stage.
+15VDC
+
200 ns min.
+V
TRANSPARENT
LATCHED
D/S
DATA 1-16 BITS
-V
50 ns min.
100 ns min.
-V
-15VDC
FIGURE 12. LL, LM, LA TIMING DIAGRAM
FIGURE 11. PROTECTION CIRCUITRY
Data Device Corporation
www.ddc-web.com
DSC-10510
H-02/02-250
7
TABLE 2. DSC-10510 PIN FUNCTIONS
PIN
1
NAME
DO1
DO2
DO3
DO4
DO5
DO6
DO7
DO8
DO9
DO10
DO11
DO12
DO13
DO14
DO15
DO16
RL
FUNCTION
Digital Input 01 (MSB) Logic “1” enables.
Digital Input 02
0.17 MIN
(4.32)
1.140
(28.96)
2
20
21
3
Digital Input 03
0.018 ±0.002
(0.46 ±0.05)
DIA PIN
4
Digital Input 04
5
Digital Input 05
6
Digital Input 06
7
Digital Input 07
8
Digital Input 08
19 EQ. SP.
0.100 = 1.9
2.14
9
Digital Input 09
(54.36)
TOL. NONCUM
(2.5 = 48.3)
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
Digital Input 10
Digital Input 11
Digital Input 12
Digital Input 13
Digital Input 14
Digital Input 15
1
40
Digital Input 16 (LSB)
26 Vrms Reference Low Input
26 Vrms Reference High Input
Synchro S1 Remote Sense Output
Synchro S1 Output
0.900
(22.86)
0.120 ±0.002
(3.05 ±0.05)
RH
0.120 ±0.002
(3.05 ±0.05)
0.200 MAX
(5.08)
S1'
S1
BOTTOM VIEW
SIDE VIEW
S2
Synchro S2 Output
S3
Synchro S3 Output
+V
Power Stage +V
Notes:
1. Dimensions are in inches (millimeters).
2. Lead identification numbers for reference only.
-V
Power Stage -V
S2'
Synchro S2 Remote Sense Output
Synchro S3 Remote Sense Output
No Connection
3. Lead cluster shall be centered within ±0.10 of outline dimensions. Lead spacing
dimensions apply only at seating plane.
4. Pin material meets solderability requirements of MIL-PRF-38534
S3'
NC
GND
-15 V
+ 15V
LA
Ground
FIGURE 13. DSC-10510 MECHANICAL OUTLINE
40-PIN TDIP
Power Supply
Power Supply
2nd Latch All Enable. Input enables dual latch.
1st Latch LSBs Enable. Enables bits 9 - 16
1st Latch MSBs Enable. Enables bits 1 - 8
3.4 Vrms Reference Low Input
3.4 Vrms Reference High Input
LL
LM
RL'
RH'
-R (TP) No connection. Factory test point.
Enable. Power stage enable input allows for digital
37
38
EN
BS
shutdown of power stage. Gives complete control
of converter to digital system.
Battle Short Input. Logic 0 overrides over tempera-
ture protection.
Built-In-Test Output. Logic 0 when loss of refer-
ence, loss of ±15 VDC supply, case temperature of
+140°C, EN input signal, or an output over-current
has been detected. Power output stage is turned
off unless BS is at 0.
39
40
BIT
K
Kick. Input used for reducing excessive current flow
in torque receiver loads at false null.
Data Device Corporation
www.ddc-web.com
DSC-10510
H-02/02-250
8
ORDERING INFORMATION
DSC-10510-XXXX
Supplemental Process Requirements:
S = Pre-Cap Source Inspection
L = Pull Test
Q = Pull Test and Pre-Cap Inspection
Blank = None of the Above
Accuracy:
3 = ±4 minutes (No Load) + 1.6 minutes at full Load (7VA Inductive)
4 = ±2 minutes (No Load) + 1.6 minutes at full Load (7VA Inductive)
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.
For DSC-10510 use optional Power Transformer, DDC P/N 42359
For S2 Grounded Applications, use Transformer DDC P/N 42929.
STANDARD DDC PROCESSING
MIL-STD-883
TEST
METHOD(S)
CONDITION(S)
INSPECTION
SEAL
2009, 2010, 2017, and 2032
—
1014
1010
A and C
TEMPERATURE CYCLE
CONSTANT ACCELERATION
BURN-IN
C
A
2001
1015, Table 1
—
Data Device Corporation
www.ddc-web.com
DSC-10510
H-02/02-250
9
NOTES
Data Device Corporation
www.ddc-web.com
DSC-10510
H-02/02-250
10
NOTES
Data Device Corporation
www.ddc-web.com
DSC-10510
H-02/02-250
11
The information in this data sheet is believed to be accurate; however, no responsibility is
assumed by Data Device Corporation for its use, and no license or rights are
granted by implication or otherwise in connection therewith.
Specifications are subject to change without notice.
105 Wilbur Place, Bohemia, New York, U.S.A. 11716-2482
For Technical Support - 1-800-DDC-5757 ext. 7382
Headquarters, N.Y., U.S.A. - Tel: (631) 567-5600, Fax: (631) 567-7358
Southeast, U.S.A. - Tel: (703) 450-7900, Fax: (703) 450-6610
West Coast, U.S.A. - Tel: (714) 895-9777, Fax: (714) 895-4988
United Kingdom - Tel: +44-(0)1635-811140, Fax: +44-(0)1635-32264
Ireland - Tel: +353-21-341065, Fax: +353-21-341568
France - Tel: +33-(0)1-41-16-3424, Fax: +33-(0)1-41-16-3425
Germany - Tel: +49-(0)8141-349-087, Fax: +49-(0)8141-349-089
Japan - Tel: +81-(0)3-3814-7688, Fax: +81-(0)3-3814-7689
World Wide Web - http://www.ddc-web.com
U
®
DATA DEVICE CORPORATION
REGISTERED TO ISO 9001
FILE NO. A5976
H-02/02-250
12
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