BB149A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Product data sheet Rev. 4 — 5 September 2011 2 of 8
NXP Semiconductors
BB149A
UHF variable capacitance diode
4. Marking
5. Limiting values
6. Characteristics
[1] V
R
is the value at which C
d
=9pF
Table 3. Marking
Type number Marking code
BB149A PL
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter Conditions Min Max Unit
V
R
reverse voltage - 30 V
V
RM
peak reverse voltage in series with a
10 k resistor
-35V
I
F
forward current - 20 mA
T
stg
storage temperature 55 +150 C
T
j
junction temperature 55 +125 C
Table 5. Characteristics
T
j
= 25
C unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
I
R
reverse current V
R
=30V
see Figure 2
--10nA
T
j
=85C; see Figure 2 --200nA
r
s
diode series
resistance
f = 470 MHz
[1]
- 0.6 0.75
C
d
diode
capacitance
f = 1 MHz; see Figure 1 and 3
V
R
= 1 V 18.22 - 21.26 pF
V
R
= 28 V 1.951 2.1 2.225 pF
capacitance ratio f = 1 MHz - 1.27 -
capacitance ratio f = 1 MHz 8.45 9 10.9
capacitance ratio f = 1 MHz - 1.05 -
capacitance
matching
V
R
=1Vto28V; in a
sequence of 10 diodes
(gliding)
--2%
C
d1V
C
d2V
----------------
C
d1V
C
d28V
------------------
C
d25V
C
d28V
------------------
