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BB178_2015 Datasheet, PDF (2/8 Pages) Quanzhou Jinmei Electronic Co.,Ltd. – VHF variable capacitance diode | |||
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Philips Semiconductors
Product speciï¬cation
VHF variable capacitance diode
BB178
FEATURES
⢠Excellent linearity
⢠Excellent matching to 2% DMA
⢠Ultra small plastic SMD package
⢠C28: 2.6 pF; ratio: 15
DESCRIPTION
The BB178 is a planar technology
variable capacitance diode, in a
SOD523 (SC-79) package. The
excellent matching performance is
handboo1k, 2 columns
2
achieved by gliding matching and a
MBK441
⢠Very low series resistance.
direct matching assembly procedure.
APPLICATIONS
⢠Electronic tuning in VHF television
tuners, band B up to 460 MHz
⢠Voltage controlled oscillators
(VCO).
PINNING
PIN
DESCRIPTION
1
cathode
2
anode
Marking code: 8.
Orientation of marking code as shown.
Cathode side indicated by a bar.
Fig.1 Simplified outline
(SOD523; SC-79) and symbol.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
CONDITIONS
VR
continuous reverse voltage
VRM
peak reverse voltage
in series with a 10 k⦠resistor
IF
continuous forward current
Tstg
storage temperature
Tj
operating junction temperature
MIN.
â
â
â
â55
â55
MAX.
32
35
20
+150
+125
UNIT
V
V
mA
°C
°C
ELECTRICAL CHARACTERISTICS
Tj = 25 °C unless otherwise speciï¬ed.
SYMBOL
PARAMETER
IR
reverse current
rs
diode series resistance
Cd
diode capacitance
CC-----dd----((--12--VV----))
C--C---d-d---(-(-2-1-8--V-V--)-)-
CC-----dd----((--22--58---VV---))-
â--C--C---d--d-
capacitance ratio
capacitance ratio
capacitance ratio
capacitance matching
1997 Nov 13
CONDITIONS
MIN.
VR = 30 V; see Fig.3
VR = 30 V; Tj = 85 °C; see Fig.3
f = 100 MHz;
VR is the value at which Cd = 30 pF
VR = 1 V; f = 1 MHz; see Figs 2 and 4
â
â
â
34.65
VR = 28 V; f = 1 MHz; see Figs 2 and 4 2.361
f = 1 MHz
â
TYP.
â
â
0.65
â
â
1.3
MAX. UNIT
10
nA
200 nA
0.8 â¦
42.35 pF
2.754 pF
â
f = 1 MHz
13.5 â
â
f = 1 MHz
â
1.08 â
VR = 1 to 28 V; in a sequence of 15 â
â
2
%
diodes (gliding)
2
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