Tuner Diodes
FEATURES
MECHANICAL DATA
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25 C
ambient temperature unless otherwise specified
Dimensions in inches and (millimeters)
SOD-123
.022 (0.55)
m
a
x.
.00
4
(
0
.1)
.1
12
(
2
.8
5)
.1
52
(
3
.8
5)
.067 (1.70)
m
a
x. .0
53
(
1
.3
5)
min. .010 (0.25)
Cathode Mark
m
a
x
.
.
006
(
0
.1
5)
Top View
.1
40
(
3
.5
5)
.1
00
(
2
.5
5)
.055 (1.40)
Case: SOD-123 Plastic Case
Weight: approx. 0.01 g
4/98
260
BB721
Symbol
Value
Unit
Reverse Voltage
V
R
32
V
Ambient Temperature
T
amb
125
C
Storage Temperature Range
T
S
55 to +125
C
Silicon epitaxial planar capacitance diodes with
very wide effective capacitance variation for tuning
the whole range of UHF television bands.
Two BB721/BB721S tuner diodes in series
are used for direct satellite receivers.
These diodes are available as singles or as matched
sets of two or more units according to the tracking
condition described in the table of characteristics.
This diode is also available in SOD-323 case
with the type designation BB721S.
ELECTRICAL CHARACTERISTICS
Ratings at 25 C
ambient temperature unless otherwise specified
261
BB721
Symbol
Min.
Typ.
Max.
Unit
Reverse Breakdown Voltage
at I
R
= 100
A
V
(BR)R
32
V
Leakage Current
at V
R
= 30 V
I
R
10
nA
Capacitance f = 1 MHz
at V
R
= 28 V
at V
R
= 1 V
C
tot
C
tot
1.9
17.5
2.3
20
pF
pF
Effective Capacitance Ratio, f = 1 MHz
at V
R
= 1 to 28 V
C
tot
(1 V)
C
tot
(28V)
8.2
9.8
Series Resistance
at f = 470 MHz, C
tot
= 14 pF
r
s
0.55
Series Inductance
L
s
2.5
nH
For any two of six consecutive diodes in the carrier tape, the maximum capacitance deviation in the reverse
bias voltage of V
R
= 0.5 to 28 V is max. 2.5%.
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