DX45 Series
Fixed Frequency Sinewave Oscillator
Description
The DX45 Series are fixed frequency sinewave oscil-
lators that deliver a single phase, high purity sinu-
soidal output. These fully finished devices can be
user specified to operate to any frequency between
100 Hz and 50.0 kHz.
Each DX45 model includes provisions for the user to
adjust the output amplitude over a 1 to 20 Vp-p
range by external resistive or voltage programming.
Over the full output range, total harmonic distortion
is 0.03% (<-70 dB) based on frequency, while the
peak-to-peak amplitude stability of any fixed level
selected is 0.001 dB/°C.
Features/Benefits:
· Stable high purity sinewave output.
· Compact 1.8"L x 0.8"W x 0.3"H minimizes board
space requirements.
· Adjustable output amplitude for applications
requiring discrete or continuous output control.
· Plug-in ready-to-use, reducing engineering
design and manufacturing cycle time.
Applications
· Reference oscillator
· Airborne equipment
· Mobile equipment
· Test Apparatus
· Telemetry Systems
· Distortion Testing
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CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
DX45 Series
Fixed Frequency Sinewave Oscillator
FIXED FREQUENCY OPERATION Discrete Resistive Programming: The method
The output signal frequency of each DX45 Series shown in Fig. 2(A) provides continuous control of
sinewave oscillator is factory calibrated to within the output amplitude. For both methods, Equation
±1% of the user-specified value. Independent of 1 defines the value of R1 for the specific set of con-
frequency setting, the output amplitude is preset to ditions.
20V p-p.
T3 T3
To put the oscillator into operation, simply connect
METAL
the power supply common, voltages (±Vs), and FILM
ground pin T2. Pin T2 must be connected to CERMET
ground in this mode of operation. R1
FINE FREQUENCY ADJUSTMENT (±5%)
For applications requiring a more accurate frequen- GND GND
cy setting, disconnect Pin T2 from ground. Connect
a Cermet potentiometer as shown in Fig. 1 for a (A) (B)
±5% frequency adjustment range.
Figure 2
450VO
R1(k)=
T1 4VS-3VO
Equation 1
CERMET
500 ohm VO = Output Voltage in V p-p
VS = Supply Voltage
Continuous Resistive Programming: To determine
GND
the value of potentiometer R1 in Fig. 2(B), simply insert
the appropriate values into Equation 1.
Suppose for example, the required output ampli-
Figure 1 tude range is 1 to 10Vp-p and the positive power
supply is +Vs = 15 Vdc. At maximum output voltage
AMPLITUDE ADJUSTMENT (1 to 20V p-p) (10V p-p) equation 1 becomes
For applications requiring either variable or lower 450 (10)
level output signals, a single resistor or a dc control R1(k)=
4(15)-3(10)
voltage can externally program the D45 output
amplitude to any value between 1 and 20V p-p. for potentiometer R1 = 150k.
Warning: Adjusting for outputs below 1Vp-p will Voltage Programmable Amplitude: The output
cause loss of the output signal. amplitude of the D45 can be voltage controlled by
applying dc programming voltage VT3 to Pin T3. The
output response is found from Equation 2, below:
VO
VT3=
2
Equation 2
where Vo is the output voltage expressed in Vp-p, and
VT3 is the dc control voltage applied to pin T3.
2
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
DX45 Series
Specifications Pin-Out and Package Data
(25°C and Vs ± 15 Vdc) Ordering Information
Oscillation Frequency (fo) D45 Package OUTLINE
Range 100 Hz to 50.0 kHz
0.80"(max)
Tolerance 1 ±1%
External Adjustment Range ±5% Side View 0.30"(max)
Frequency Stability 0.15" (min)
0.025" (dia)
Temperature 0.02%/°C
Supply/Output Amplitude Variation 0.005%/% 1.80"(max)
Output Characteristics
Front View
Amplitude
Preset 20V p-p ± 1%
Adjustment Range 2 1 to 20V p-p All dimensions are in inches 0.10"(typ)
All case dimensions ± 0.01"
Stability vs. Temperature 3 0.001 dB/°C
0.80"
Stability vs. Supply Voltage 4 <0.05 dB/% 0.70"
T3 T2 T1 GND
Drive Capacity
Output current @ 20V p-p 5 ±5mA pk Bottom View
Output Resistance @ 20V p-p <10 W -Vs +Vs OUT
0.10"
Distortion 6 0.00"
Harmonic 100 Hz to 50.0 kHz: 0.03% (-70 dB) 0.00"
0.20"
0.40"
1.50"
1.60"
1.80"
0.80"
1.10"
1.30"
TERMINAL KEY
Noise 50µV rms V OUT Signal Output
DC Power Supply (±Vs) T1 Fine Frequency Adjust
Rated Voltage ±15 Vdc T2 Frequency Adjust Enable*
Operating Voltage Range ±12 Vdc to ± 18 Vdc T3 Output Amplitude Adjust
Maximum Safe Voltage ±18 Vdc +V s Power Supply Voltage, Positive
Quiescent Current ±8 mA typ GND Ground
-V s Supply Voltage, Negative
±12 mA max.
Temperature *Must be connected to ground when fine frequency
Operating -20 to +70°C adjustment is not required.
Storage -25 to +85°C
Notes:
1. Externally adjusted to zero.
2. All models can deliver 6V p-p into a 600 W load. Ordering Information
3. The amplitude stability of a resistively programmed unit is directly propor-
tional to the external programming resistor temperature coef ficient.
4. The amplitude stability of a voltage programmed unit having the program- DX45-849 Hz
ming dc voltage applied to pin T3 is 0.1dB/%V T3.
5. The output is short circuit protected. Oscillation Frequency 7
6. Distortion is primarily third harmonic. Specification is for resistive loading. e.g., 849 Hz
7. How to Specify Oscillation Frequency: 25.0 kHz
Oscillation frequencies are specified by attaching a three-digit frequency
50.0 kHz
designator to the basic model number. Oscillation frequencies can range
from 100 Hz to 50.0 kHz.
We hope the information given here will be helpful. The information is based on data and our best knowledge, and we consider the information to be true and accurate. Please read all statements,
recommendations or suggestions herein in conjunction with our conditions of sale which apply to all goods supplied by us. W e assume no responsibility for the use of these statements,
recommendations or suggestions, nor do we intend them as a recommendation for any use which would infringe any patent or copyri ght. PR-00DX45-9/06
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CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de