BB178_97 Datasheet, PDF (2/8 Pages) NXP Semiconductors – VHF variable capacitance diode

Philips Semiconductors
Product specification
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
V_R
continuous reverse voltage
V_RM
peak reverse voltage
in series with a 10 kΩ resistor
I_F
continuous forward current
T_stg
storage temperature
T_j
operating junction temperature
MIN.
−
−
−
−55
−55
MAX.
32
35
20
+150
+125
UNIT
V
V
mA
°C
°C
ELECTRICAL CHARACTERISTICS
T_j = 25 °C unless otherwise specified.
SYMBOL
PARAMETER
I_R
reverse current
r_s
diode series resistance
C_d
diode capacitance
CC-----_{dd----((--12--VV----))}
C--C---_d^-d---₍^-(-₂^-1-₈^--V-_V^--)-₎^-
CC-----_{dd----((--22--58---VV---))-}
∆_{--C--C---d--d-}
capacitance ratio
capacitance ratio
capacitance ratio
capacitance matching
1997 Nov 13
CONDITIONS
MIN.
V_R = 30 V; see Fig.3
V_R = 30 V; T_j = 85 °C; see Fig.3
f = 100 MHz;
V_R is the value at which C_d = 30 pF
V_R = 1 V; f = 1 MHz; see Figs 2 and 4
−
−
−
34.65
V_R = 28 V; f = 1 MHz; see Figs 2 and 4 2.361
f = 1 MHz
−
TYP.
−
−
0.65
−
−
1.3
MAX. UNIT
10
nA
200 nA
0.8 Ω
42.35 pF
2.754 pF
−
f = 1 MHz
13.5 −
−
f = 1 MHz
−
1.08 −
V_R = 1 to 28 V; in a sequence of 15 −
−
2
%
diodes (gliding)
2