BB178 Datasheet, PDF (1/2 Pages) NXP Semiconductors – VHF variable capacitance diode

LESHAN RADIO COMPANY, LTD.
VHF variable capacitance diode
FEATURES
· Excellent linearity
· Excellent matching to 2% DMA
· Ultra small plastic SMD package
· C 28: 2.6 pF; ratio: 15
· Very low series resistance.
APPLICATIONS
· Electronic tuning in VHF television
tuners, band B up to 460 MHz
· Voltage controlled oscillators(VCO).
DESCRIPTION
The BB178 is a planar technology variable
capacitance diode, in a SOD523 (SC-79)
package. The excellent matching perfor-
mance is achieved by gliding matching and
a direct matching assembly procedure.
1
CATHODE
2
ANODE
BB 178
1
2
SOD523 SC-79
MARKING CODE:8
1
2
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
CONDITIONS
VR
continuous reverse voltage
V RM
peak reverse voltage
in series with a 10 kΩ resistor
IF
continuous forward current
T stg
storage temperature
Tj
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
CONDITIONS
IR
rs
Cd
C d(1V)
C d(2V)
C d(1V)
C d(28V)
C d(25V)
C d(28V)
∆C _d
C_d
reverse current
diode series resistance
diode capacitance
capacitance ratio
V R = 30 V; see Fig.2
V R = 30 V; T j =85°C; see Fig.2
f = 100 MHz;
V R is the value at which Cd =30 pF
V R = 1 V; f = 1 MHz; see Figs 1and 3
V R = 28 V; f = 1 MHz; see Figs 1and 3
f = 1 MHz
capacitance ratio
f = 1 MHz
capacitance ratio
f = 1 MHz
capacitance matching V R = 1 to 28 V; in a sequence of 15
diodes(gliding)
MIN.
–
–
–
34.65
2.361
–
13.5
–
–
MAX.
–
–
0.65
TYP.
10
200
0.8
– 42.35
– 2.754
1.3
–
–
–
1.08
–
–
2
UNIT
nA
nA
Ω
pF
pF
%
BB178–1/2