1/6
STDD15 series
August 2002 - Ed: 3A
LOW CAPACITANCE DETECTION DIODE
The STDD15 is a dual diode series for the
detection of a RF signal and the compensation of
the voltage drift with the temperature. The SOT323
package makes the device ideal in application
where the space saving is critical like mobile
phones.
The low junction capacitance will reduce the
disturbance on the RF signal
DESCRIPTION
s
Low diode capacitance
s
Device designed for RF application
s
Low profile package
s
Available in 3 configurations
s
Very low parasitic inductor & resistor
FEATURES AND BENEFITS
Symbol
Parameter
Value
Unit
V
RRM
Repetitive peak reverse voltage
15
V
I
F
Continuous forward current
10
mA
I
FSM
Surge non repetitive forward current
tp = 10ms
2
A
T
stg
Storage temperature range
- 65 + 150
C
Tj
Maximum operating junction temperature
150
C
ABSOLUTE RATINGS (limiting values)
I
F(AV)
10 mA
V
RRM
15 V
Tj (max)
150 C
V
F
(max)
0.51 V
MAIN PRODUCT CHARACTERISTICS
SOT323-3L
STDD15-xxW
SOT323-6L
STDD15-xxS
1
2
3
1
2
3
1
2
3
4
5
6
Series configuration
STDD15-04W
Parallel configuration
STDD15-07S
Common cathode configuration
STDD15-05W
SCHEMATIC DIAGRAM
STDD15 series
2/7
Symbol
Parameter
Tests conditions
Min.
Typ.
Max.
Unit
I
R
*
Reverse leakage
current
Tj = 25C
V
R
= 1V
0.035
A
Tj = 125C
6
30
Tj = 25C
V
R
= 15V
0.23
A
Tj = 125C
10
100
V
F
*
Forward voltage drop
Tj = 25C
I
F
= 1 mA
350
380
mV
Tj = 125C
230
260
Tj = 25C
I
F
= 10 mA
500
570
Tj = 125C
450
510
* Pulse test: tp
250s, Delta
2%
STATIC ELECTRICAL CHARACTERISTICS
Symbol
Parameter
Value
Unit
R
th (j-a)
*
Junction to ambient
500
C/W
*: Mounted with minimum recommended pad size, PC board FR4.
THERMAL PARAMETERS
Symbol
Parameter
Tests conditions
Min.
Typ.
Max.
Unit
C
Diode capacitance
V
R
= 0 V
F = 1MHz
1.0
pF
R
F
Forward resistance
I
F
= 5 mA
F = 100MHz
15
Ls
Series inductance
1.5
nH
ELECTRICAL CHARACTERISTICS
STDD15 series
3/6
1.E-01
1.E+00
1.E+01
1.E+02
0.0
0.2
0.4
0.6
0.8
1.0
1.2
VFM(V)
Tj=125C
Tj=125C
Tj=85C
Tj=85C
Tj=25C
Tj=25C
Tj=-40C
Tj=-40C
IFM(mA)
Fig. 1:
Forward voltage drop versus forward
current (typical values).
1.E-03
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
0.0
2.5
5.0
7.5
10.0
12.5
15.0
VR(V)
Tj=125C
Tj=85C
Tj=25C
IR(A)
Fig. 2: Reverse leakage current versus reverse
voltage applied (typical values).
1
10
100
1.0
10.0
100.0
IF(mA)
F=10kHz
Tj=25C
RF( )
Fig. 3:
Differential forward resistance versus
forward current (typical values).
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0.0
2.5
5.0
7.5
10.0
12.5
15.0
VR(V)
F=1MHz
Vosc=30mV
RMS
Tj=25C
C(pF)
Fig. 4:
Junction capacitance versus reverse
voltage applied (typical values).
10.0
100.0
1000.0
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
tp(s)
Zth(j-a)(C/W)
Fig. 5: Variation of thermal impedance junction to
ambient versus pulse duration (printed circuit
board, epoxy FR4).
300
350
400
450
500
550
600
0
5
10
15
20
25
30
35
40
45
50
S(mm)
Rth(j-a)
Fig. 6: Thermal resistance junction to ambient
versus copper surface under each lead (printed
circuit board, epoxy FR4)..
STDD15 series
4/6
PACKAGE MECHANICAL DATA
SOT323-3L
E
c
L
H
b
D
A
A1
e
REF.
DIMENSIONS
Millimeters
Inches
Min.
Typ.
Max.
Min.
Typ.
Max.
A
0.8
1.1
0.031
0.043
A1
0.0
0.1
0.0
0.004
b
0.25
0.4
0.010
0.016
c
0.1
0.26 0.004
0.010
D
1.8
2.0
2.2
0.071 0.079 0.086
E
1.15
1.25
1.35 0.045 0.049 0.053
e
0.65
0.026
H
1.8
2.1
2.4
0.071 0.083 0.094
L
0.1
0.2
0.3
0.004 0.008 0.012
0
30
0
30
0.95
1
0.50
2.9
0.8
FOOTPRINT (in millimeters)
Parameter
Value
Unit
Is
2.66 e-8
A
N
1.04
M
0.772
Vj
0.65
V
Eg
0.69
eV
Xti
2
Rs
15
W
Cjo
0.85 e-12
F
Bv
20
V
Ibv
10 e-3
A
Electrical Model (PSPICE)
STDD15 series
5/6
PACKAGE MECHANICAL DATA
SOT323-6L
A2
A
A1
E
b
HE
D
e
e
Q1
c
L
REF.
DIMENSIONS
Millimeters
Inches
Min.
Max.
Min.
Max.
A
0.8
1.1
0.031
0.043
A1
0
0.1
0
0.004
A2
0.8
1
0.031
0.039
b
0.15
0.3
0.006
0.012
c
0.1
0.18
0.004
0.007
D
1.8
2.2
0.071
0.086
E
1.15
1.35
0.045
0.053
e
0.65 Typ.
0.025 Typ.
HE
1.8
2.4
0.071
0.094
Q1
0.1
0.4
0.004
0.016
L
0.1
0.45
0.004
0.018
0.3mm
1mm
1mm
0.35mm
2.9mm
FOOTPRINT (in millimeters)
Note: The device fulfills the MSL level 1 after
leadfree soldering profile.
Ordering code
Marking
Package
Weight
Base qty
Delivery mode
STDD15-04W
24
SOT323-3L
0.006 g
3000
Tape & reel
STDD15-05W
25
SOT323-3L
0.006 g
3000
Tape & reel
STDD15-07S
D25
SOT323-6L
0.006 g
3000
Tape & reel
PDF 
ZIP