Document
BB639/BB659...
Silicon Variable Capacitance Diodes
For tuning of extended frequency band
in VHF TV / VTR tuners
High capactance ratio Low series inductance Low series resistance Excellent uniformity and matching due to
"in-line" matching assembly procedure
BB639 BB659
1
2
Type BB639 BB659
Package SOD323 SCD80
Configuration single single
LS (nH) Marking 1.8 yellow S 0.6 DE
Maximum Ratings at TA = 25°C, unless otherwise specified Parameter Symbol Value Unit
Diode reverse voltage Peak reverse voltage ( R 5k ) Forward current Operating temperature range Storage temperature
VR VRM IF Top Tstg
30 35 20 -55 ... 150 -55 ... 150
V
mA °C
1
Nov-07-2002
BB639/BB659...
Electrical Characteristics at TA = 25°C, unless otherwise specified Symbol Values Parameter min. DC Characteristics Reverse current VR = 30 V VR = 30 V, TA = 85 °C AC Characteristics Diode capacitance
VR = 1 V, f = 1 MHz VR = 2 V, f = 1 MHz VR = 25 V, f = 1 MHz VR = 28 V, f = 1 MHz CT
Unit max. nA
typ.
IR 10 200
pF 36 27.7 2.5 2.4 38.3 29.75 2.85 2.6 14.7 10.4 40 31.8 3.2 2.9 %
Capacitance ratio
VR = 1 V, VR = 28 V, f = 1 MHz
CT1 /CT28 CT2 /CT25
13.5 9.8
Capacitance ratio
VR = 2 V, VR = 25 V, f = 1 MHz
Capacitance matching1) BB639
CT/CT
rS
VR = 1 V, VR = 28 V, f = 1 MHz, 7 diode sequence
0.3 0.4 0.65
2.5 1 2 0.7
VR = 1 V, VR = 28 V, f = 1 MHz, 4 diode sequence
BB659
VR = 1 V, VR = 28 V, f = 1 MHz, 7 diode sequence
BB659 Series resistance
VR = 5 V, f = 470 MHz
1For
-
details please refer to Application Note 047.
2
Nov-07-2002
BB639/BB659...
Diode capacitance CT = (VR )
f = 1MHz
40
pF 1/°C
Temperature coefficient of the diode capacitance TCc = (VR )
10 -3
30
CT
25
TC C
10 -4 10 -5 0 10
20
15
10
5
0 0
5
10
15
20
V
30
10
1
V
10
2
VR
VR
Reverse current I R = (TA)
VR = 28V
10
3
Reverse current IR =
TA = Parameter
10 3
pA
(VR)
85°C
pA
10 2 10
2
IR
IR
25°C
10 1
10
1
10 0
10
0
-30
-10
10
30
50
70
°C
100
10 -1 0 10
10
1
V
10
2
TA
VR
3
Nov-07-2002
.