BB179 Datasheet, PDF (1/2 Pages) NXP Semiconductors – UHF variable capacitance diode

LESHAN RADIO COMPANY, LTD.
UHF variable capacitance diode
FEATURES
· Excellent linearity
· Excellent matching to 2% DMA
· Ultra small plastic SMD package
· C28: 2.1 pF; ratio: 9
· Low series resistance.
APPLICATIONS
· Electronic tuning in UHF television tuners
· Voltage controlled oscillators
DESCRIPTION
The BB179 is a planar technology variable capacitance diode, in a SOD523 (SC-79)
package. The excellent matching performance is achieved by gliding matching and a
direct matching assembly procedure.
1
CATHODE
2
ANODE
BB 179
1
2
SOD523 SC-79
MARKING CODE:9
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.
30
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 = 470 MHz;
V R is the value at which Cd =9 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.
–
–
–
18.22
1.951
–
8.45
–
–
MAX.
–
–
0.6
TYP.
10
200
0.75
– 21.26
– 2.225
1.27
–
UNIT
nA
nA
Ω
pF
pF
–
10.9
1.05
–
–
2
%
BB179–1/2