LESHAN RADIO COMPANY, LTD.
Low-voltage variable capacitance diode
BB 145
FEATURES · Ultra small plastic SMD package · C4: 3 pF; ratio: 2.1 · Low series resistance. APPLICATIONS · Voltage controlled oscillators (VCO). DESCRIPTION The BB145 is a planar technology variable capacitance diode in a SOD523 (SC-79) package.
1
2
SOD523 SC-79
1 CATHODE
2 ANODE
MARKING CODE:U
U
MAX. 6 8 20 +150 +150 UNIT V V mA °C °C MAX. 10 200 0.6 7.4 3.25 – UNIT nA nA Ω pF pF – – – – – –
1
2
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL VR V RM IF T stg Tj PARAMETER continuous reverse voltage peak reverse voltage continuous forward current storage temperature operating junction temperature in series with a 10 kΩ resistor CONDITIONS MIN. – – – –55 –55
ELECTRICAL CHARACTERISTICS T j =25°C unless otherwise specified. SYMBOL IR rs Cd PARAMETER reverse current diode series resistance diode capacitance CONDITIONS V R = 6 V; see Fig.2 V R =6 V; T j =85°C; see Fig.2 f = 470 MHz; V R =1 V V R = 1 V; f = 1 MHz; see Figs 1 and 3 V R = 4 V; f = 1 MHz; see Figs 1 and 3 C d ( 1V) C d ( 4V) capacitance ratio f = 1 MHz MIN. – – – 6.4 2.75 2 TYP.
BB145–1/2
LESHAN RADIO COMPANY, LTD.
BB 145
10
8
C d ( pF )
6
f = 1 MHz; T j =25°C
4
2
0 10 –1 1 10
V R( V )
Fig.1 Diode capacitance as a function of reverse voltage; typical values.
10 3
10 -3
I R (nA)
10 2
10 0 50 100 10 -4 10 –1 1 10
T j ( °C )
TC d ( K -1 )
V R( V )
Fig.2 Reverse current as a function of junction temperature; maximum values.
Fig.3 Temperature coefficient of diode capacitance as a function of reverse voltage; typical values.
BB145–2/2
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