™
DATA SHEET
SUBMINIATURE PROPORTIONALLY CONTROLLED HEATER
GENERAL DESCRIPTION
DN510
HEATER BLOCK
DIAGRAM
1
CONTROL CIRCUIT
TEMP.
SENSOR
HEATER
The DN510 is a subminiature proportionally controlled heater,
whose temperature can be programmed with a single external
resistor. This device is ideally suited for regulating the temperature
of sensitive electronic components such as fiber optic components and
crystal oscillators. The DN510 is in a ceramic package and can
supply up to 14 watts of power from an unregulated power supply.
FEATURES
•
•
•
•
BERYLLIA BASE FOR GOOD THERMAL CONDUCTION
REGULATION TEMPERATURE FROM 5˚C ABOVE AMBIENT TO 100˚C
28 TO 50 VOLT OPERATION
ELECTRICALLY ISOLATED FROM THE CASE
VDD
+
4
R
TEMP. SET
C
COM.
2
3
MAXIMUM RATINGS
Rating
Supply Voltage
Power Dissipation
Operating Temperature
Storage Temperature
Symbol
VDD
PD
Tmax
T min
Value
50
16
120
-65 to +150
Unit
V
DC
Watts
oC
o
C
OUTLINE DIMENSIONS
0.025"
Heater
surface
0.110"
0.340"
0.480"
PIN
1
2
Therm
Optics
DN510
4
0.275"
xxxx
3
OPERATING CHARACTERISTICS
Characteristic
Supply Voltage (Pin 1 to Pin 4)
Steady State Supply Current
@ VDD = +48 V
DC
_
V
Temperature Variation over
Operating Voltage
Symbol
VDD
I
S
T
V
TL
C
C
TA + 5
0
120
14
Min
+28
5.0
Max
+50
350
2
6
100
Unit
V
DC
mA
DC
o
C
The DN510 electrical
output pads are Pd-Pt-Ag
and can be soldered. The
solder used, such as SN-62,
should contain silver to
prevent leaching of the pads
from the substrate.
0.010"
0.060"
Temperature Variation with Load
Control Temperature Range
Control Resistor Value
Pin 2 to Pin 3 (See Figure 1)
Maximum Control Temperature
when RC = 0 Ohms
Turn on power at start-up
@ VDD = + 48Volts
o
C
o
C
Tmax
PD
_
V
T
R
Ω
o
C
Pad size
is 0.060" x
0.107"
(four places)
0.107"
0.041"
0.107"
0.010"
Watts
™
Page 1
DN510
Heater Temperature vs
Temperature Set Resistor
T
°C
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
RS
KΩ
360.1
340.6
322.3
305.0
288.7
273.4
259.0
245.4
232.5
220.4
209.0
198.3
188.1
178.5
169.4
160.8
152.7
145.1
137.8
131.0
124.5
118.3
112.5
107.0
101.8
96.9
92.2
87.8
83.6
T
°C
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
RS
KΩ
79.6
75.8
72.2
68.8
65.5
62.5
59.5
56.8
54.1
51.6
49.2
46.9
44.8
42.7
40.7
38.9
37.1
35.4
33.8
32.3
30.8
29.4
28.1
26.8
25.5
24.4
23.2
22.2
21.2
T
°C
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
RS
KΩ
20.2
19.3
18.4
17.5
16.7
15.9
15.2
14.5
13.8
13.2
12.5
11.9
11.4
10.8
10.3
9.8
9.3
8.9
8.4
8.0
7.6
7.2
6.8
6.5
6.1
5.8
5.5
5.2
4.9
T
°C
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
RS
KΩ
4.6
4.4
4.1
3.9
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.68
1.52
1.37
1.23
1.09
0.95
0.82
0.70
0.58
0.46
0.35
0.25
0.14
0.04
MAX. START UP CURRENT
VS.
SUPPLY VOLTAGE
SUPPLY CURRENT (mAMPS)
400
300
200
100
0
MAX. THERMAL POWER AVAILABLE
VS.
SUPPLY VOLTAGE
OUTPUT POWER (WATTS)
16
12
8
4
0
0
FIG. 1
FIG. 2
0
10 20 30 40
SUPPLY VOLTAGE
(VOLTS D.C.)
50
10 20 30 40
SUPPLY VOLTAGE
(VOLTS D.C.)
50
TYPICAL BASE TEMPERATURE
CHANGE WITH
POWER DISSIPATION
0
TEMP. CHANGE C
-2
-4
-6
-8
0
4
8
12
16
POWER OUTPUT (WATTS)
OPTIONS
1. The DN510 is normally supplied with leads.
However, the heater can be supplied without
them. The leaded device has #33 insulated
magnet wire attached to the solder pads as
shown in figure 4.
2.
Operating temperature can be set at the
factory by soldering a chip resistor between
pins 3 and 4. Consult the the factory when
specific heater temperatures are required.
3.
The DN510 heater can
be attached to the device
to be heated by Ablefilm
561K thermally conductive
adhesive film. A 0.005" thick
0.480" x 0.275" piece
of this film is provided with
each DN510 heater.
FIG. 4
+Vcc
COM.
3"
DN510
ACTUAL SIZE
Therm
Optics
DN510
xxxx
Rc
Rc
3"
A chip resistor is
used to set the
temperature of
the heater.
FIG. 3
FIG. 5
+Vcc
COM.
Therm
Optics
DN510
xxxx
Device being heated
561K FILM
DN510 heater
Force
Clamp the device being
heated and the DN510
heater togeather with the
thermally conductive pre-
form in between.
INSTRUCTIONS FOR
APPLICATION OF THE FILM
1. Place precut adhesive film between
clean surfaces to be bonded.
2. Assemble components. Apply spring
loaded clamp or dead weight to
provide continuous pressure of at least
one psi during the cure cycle.
3. Place assembly in a preheated
oven and cure at one of the following
schedules:
1/2 hr @ 150˚C
2 hrs @ 125˚C
The base material of the DN510 is
Beryllia which provides efficient
energy transfer from the heating
element located inside the heater
and the heating surface of the
DN510. The temperature drop
across the Beryllia substrate, as a
function of power transfer, is shown
in figure 3.
The thermal interface between the
DN510 heater and the device
being heated causes a temperature
drop. Care should be taken to make
sure that a good thermal interface
exists between the two surfaces.
NOTES:
Force
FIG. 7
APPLICATIONS
Applications for the DN510 are to regulate
the temperature of sensitive electronic components. One
such application is employing the DN510 as the
temperature controlling element in an oven controlled
crystal oscillator. This application is illustrated in figure 8.
When using the DN510, care should be taken to
thermally insulate the composite heater and the
electronics package being heated from the
surrounding environment. This will minimize the amount
of power required to heat the package which in turn will
reduce the temperature variation of the package over the
ambient temperature extremes .
OVEN CONTROLLED CRYSTAL OSCILLATOR
APPLICATION USING THE DN510 HEATER
INSULATING
SHELL
OSCILLATOR
DN510
HEATER
PRINTED CIRCUIT BOARD
FIG. 7
1. All DN510 heaters are tested for gross leaks in Fluorocabon at 125˚C.
2. Do not reverse the voltage polarity on the input power leads. This can cause
permanent damage to the device.
™
Last Updated 6/25/01
1004 Mallory Way •Carson City, NV 89701 •Phone: 775-882-7721 • Fax: 775-882-7675 •E-mail: info@thermoptics.com • http://www.thermoptics.com
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