Silicon Tuning Diode (For tuning UHF and VHF TV Tuners Large capacitance ratio/ low series resistance)
BB 545 Silicon Tuning Diode
Preliminary data • For tuning UHF and VHF TV Tuners • Large capacitance ratio, low series re...
BB 545 Silicon Tuning Diode
Preliminary data For tuning UHF and VHF TV Tuners Large capacitance ratio, low series resistance
Type BB 545
Marking Ordering Code white U Q62702-B583
Pin Configuration 1=K 2=A
Package SOD-323
Maximum Ratings Parameter Diode reverse
voltage Forward current Operating temperature range Storage temperature Symbol Values 30 20 - 55 ... + 150 - 55 ... + 150 Unit V mA °C
VR IF Top Tstg
Thermal Resistance Junction ambient
1)
RthJA
≤ 450
K/W
1) Package mounted on epoxy pcb 40mm x 40mmm x 1.5mm / 0.5cm2 Cu
Semiconductor Group
1
Jan-31-1997
BB 545
Electrical Characteristics at TA=25°C, unless otherwise specified Parameter Symbol min. DC characteristics Reverse current Values typ. max. Unit
IR
10 200
nA
VR = 30 V, TA = 25 °C VR = 30 V, TA = 85 °C
AC characteristics Diode capacitance
CT
18.5 13.2 1.85 1.8 20 14.8 2.07 2 7.2 10 0.6 2 21.5 16.4 2.28 2.2
pF
VR = 1 V, f = 1 MHz VR = 2 V, f = 1 MHz VR = 25 V, f = 1 MHz VR = 28 V, f = 1 MHz
Capacitance ratio
CT2/CT25
6.3 8.1 11
-
VR = 2 V, VR = 25 V, f = 1 MHz
Capacitance ratio
CT1/CT28
9 ∆CT/CT 2.5 Ω nH %
VR = 1 V, VR = 28 V, f = 1 MHz
Capacitance matching 1)
VR = 1 ... 28 V, f = 1 MHz
Series resistance
rs Ls
VR = 3 V, f = 470 MHz
Series inductance
Semiconductor Group
2
Jan-31-1997
BB 545
Diode capacitance CT = f (VR) f = 1MHz
Temperature coefficient of the diode capacitance TCc = f (VR) f = 1MHz
10 -1 1/°C
22 pF
CT
18 16 14 12 10 8 6 4 2 0 0 5 10 15 20 V 30
TCc
10 -2
1...