|
Unisonic Technologies |
UNISONIC TECHNOLOGIES CO., LTD
BB178
Preliminary
VHF VARIABLE CAPACITANCE
DIODE
DIODE
DESCRIPTION
The UTC BB178 is a planar technology variable capacitance
diode providing the designers excellent matching performance,
ultra-low series resistance and great linearity.
The UTC BB178 is suitable for VCO (Voltage Controlled
Oscillators) and Electronic tuning in VHF (Very High Frequency)
tuners.
FEATURES
* Excellent matching to 2% DMA
* Ultra low series resistance.
* Great linearity
* C28: 2.6 pF; ratio: 15
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
BB178L-CC2-R
BB178G-CC2-R
Note: Pin Assignment: A: Anode, K: Cathode
Package
SOD-523
2
1
SOD-523
Pin Assignment
12
AK
Packing
Tape Reel
MARKING
78
G: Halogen Free
L : Lead Free
www.DataSheet4U.com
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
1 of 2
QW-R601-032.a
BB178
Preliminary
DIODE
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
Continuous Reverse Voltage
VR 32 V
Peak Reverse Voltage In series with a 10 kΩ resistor
VRM
35
V
Continuous Forward Current
IF 20 mA
Storage Temperature
Operating Junction Temperature
TSTG
TJ
-40~+150
-40~+125
°C
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS (TJ =25°C unless otherwise specified.)
PARAMETER
Reverse Current
Diode Series Resistance
Diode Capacitance
Capacitance Ratio
Capacitance Ratio
Capacitance Ratio
Capacitance Matching
SYMBOL
IR
rS
Cd
Cd(1V)
Cd(2V)
Cd(1V)
Cd(28V)
Cd(25V)
Cd(28V)
ΔCd
Cd
TEST CONDITIONS
MIN
VR = 30 V
VR = 30 V, TJ=85 °C
f = 100 MHz, VR is the value at
which Cd=30pF
VR = 1 V, f = 1 MHz
34.65
VR = 28 V, f = 1 MHz
2.361
TYP
0.65
MAX UNIT
10 nA
200 nA
0.8 Ω
42.35 pF
2.754 pF
f = 1 MHz
1.3
f = 1 MHz
13.5
f = 1 MHz
VR = 1~28 V, in a sequence of
15 diodes (gliding)
1.08
2%
UTC assumes no responsibility for equipment failures that result from using products at values that
www.DataSeohxtheceeetr4eUpda,.croeamvmeentemrso)mlisetnetdariinlyp, rroadteudctsv
alues (such as maximum ratings, operating condition ranges, or
specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 2
QW-R601-032.a
|