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BB149A Datasheet, PDF (2/8 Pages) NXP Semiconductors – UHF variable capacitance diode
Philips Semiconductors
UHF variable capacitance diode
Product specification
BB149A
FEATURES
• Excellent linearity
• Excellent matching to 2% DMA
• Very small plastic SMD package
• C28: 2.1 pF; ratio 9
• Low series resistance.
APPLICATIONS
• Electronic tuning in UHF television
tuners
• Voltage controlled oscillators
(VCO).
DESCRIPTION
The BB149A is a planar technology
variable capacitance diode, in a
SOD323 very small plastic SMD
package. The excellent matching
performance is achieved by gliding
matching and a direct matching
assembly procedure.
PINNING
PIN
DESCRIPTION
1
cathode
2
anode
hand1book, 2 columns
2
MAM392
Marking code: PL.
Cathode side indicated by a bar.
Fig.1 Simplified outline
(SOD323) and symbol.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
CONDITIONS
VR
continuous reverse voltage
VRp
peak reverse voltage
IF
continuous forward current
Tstg
storage temperature
Tj
operating junction temperature
in series with a 10 kΩ resistor
MIN.
−
−
−
−55
−55
MAX.
30
35
20
+150
+125
UNIT
V
V
mA
°C
°C
ELECTRICAL CHARACTERISTICS
Tj = 25 °C unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
IR
rs
Cd
CC-----dd----((--12--VV----))
reverse current
diode series resistance
diode capacitance
capacitance ratio
VR = 30 V; see Fig.3
−
VR = 30 V; Tj = 85 °C; see Fig.3
−
f = 470 MHz; VR is the value at which Cd = 9 pF −
VR = 1 V; f = 1 MHz; see Figs 2 and 4
18.22
VR = 28 V; f = 1 MHz; see Figs 2 and 4
1.951
f = 1 MHz
−
−
−
0.6
−
−
1.27
10 nA
200 nA
0.75 Ω
21.26 pF
2.225 pF
−
CC-----dd---(-(-1-2--8V---V)---)-
capacitance ratio
f = 1 MHz
8.45 −
10.9
C-C----dd----((--22--58---VV---))-
capacitance ratio
f = 1 MHz
−
1.05 −
∆--C--C---d--d-
capacitance matching VR = 1 to 28 V; in a sequence of 15 diodes
−
−
2
%
(gliding)
1997 Dec 17
2