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BB178 Datasheet

VHF variable capacitance diode

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BB178
VHF variable capacitance diode
Rev. 3 — 5 September 2011
Product data sheet
1. Product profile
1.1 General description
The BB178 is a planar technology variable capacitance diode, in a SOD523 (SC-79) ultra
small plastic package. The excellent matching performance is achieved by gliding
matching and a Direct Matching Assembly (DMA) procedure.
1.2 Features and benefits
Excellent linearity
Excellent matching to 2 % DMA
Ultra small plastic SMD package
Cd(28V): 2.6 pF; Cd(1V) to Cd(28V) ratio: 15
Very low series resistance.
1.3 Applications
Electronic tuning in VHF television tuners, band B up to 460 MHz
Voltage Controlled Oscillators (VCO).
2. Pinning information
Table 1.
Pin
1
2
Pinning
Description
cathode
anode
[1] The marking bar indicates the cathode.
3. Ordering information
Simplified outline[1]
Symbol
1
2
sym008
Table 2. Ordering information
Type number
Package
Name
Description
BB178
SC-79
plastic surface mounted package; 2 leads
Version
SOD523


NXP Semiconductors Electronic Components Datasheet

BB178 Datasheet

VHF variable capacitance diode

No Preview Available !

NXP Semiconductors
BB178
VHF variable capacitance diode
4. Marking
Table 3. Marking
Type number
BB178
Marking code
8
5. Limiting values
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter
Conditions
Min
VR
reverse voltage
-
VRM
peak reverse voltage
in series with a
-
10 kresistor
IF
forward current
-
Tstg
storage temperature
55
Tj
junction temperature
55
Max Unit
32
V
35
V
20
mA
+150 C
+125 C
6. Characteristics
Table 5. Characteristics
Tj = 25 C unless otherwise specified.
Symbol Parameter
Conditions
IR
reverse current see Figure 2
VR = 30 V
VR = 30 V; Tj = 85 C
rs
diode series
f = 100 MHz
resistance
Cd
diode
f = 1 MHz; see Figure 1
capacitance
and Figure 3
C-----d----1---V----
Cd2V
VR = 1 V
VR = 28 V
capacitance ratio f = 1 MHz
C-----d----1---V------ capacitance ratio f = 1 MHz
C d 28 V
C-----d----2---5---V---capacitance ratio f = 1 MHz
C d 28 V
----C----d-
capacitance
matching
VR = 1 V to 28 V; in a
sequence of 10 diodes
Cd
(gliding)
[1] VR is the value at which Cd = 30 pF.
Min Typ
-
-
-
-
[1] -
0.65
34.65 -
2.361 2.6
-
1.3
13.5 15
-
1.08
-
-
Max Unit
10
nA
200 nA
0.8
42.35 pF
2.754 pF
-
-
-
2
%
BB178
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 5 September 2011
© NXP B.V. 2011. All rights reserved.
2 of 8


Part Number BB178
Description VHF variable capacitance diode
Maker NXP
Total Page 3 Pages
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