LESHAN RADIO COMPANY, LTD.
S21–1/2
Band-switching diode
SOD523 SC-79
1
2
BA 891
2
ANODE
1
CATHODE
FEATURES
· Ultra small plastic SMD package
· Low diode capacitance: max. 1.05 pF
· Low diode forward resistance: max. 0.7 Ω
· Small inductance.
APPLICATIONS
· Low loss band-switching in VHF television tuners
· Surface mount band-switching circuits.
DESCRIPTION
The BA891 is a planar, high performance band-switching diode in the ultra small
SOD523 SMD plastic package.
LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
R
continuous reverse voltage – 35 V
II F continuous forward current – 100 mA
P
tot
total power dissipation T
s
=90°C – 715 mW
T stg storage temperature -65 +150 °C
T j junction temperature -65 +150 °C
ELECTRICAL CHARACTERISTICS T
j
= 25°C unless otherwise specified.
SYMBOL PARAMETER CONDITIONS TYP. MAX. UNIT
V
F
forward voltage I
F
=10 mA – 1 V
I R reverse current V R =30 V – 20 nA
C
d
diode capacitance f = 1 MHz; note 1; see Fig.1
V R = 1 V 0.8 1.05 pF
V
R
= 3 V 0.65 0.9 pF
r D diode forward resistance f = 100 MHz; note 1; see Fig.2
I
F
= 3 mA 0.45 0.7 Ω
I F = 10 mA 0.36 0.5 Ω
L
S
series inductance 0.6 - nH
Note
1. Guaranteed on AQL basis; inspection level S4, AQL 1.0.
THERMAL CHARACTERISTICS
SYMBOL PARAMETER VALUE UNIT
R
th j-s
thermal resistance from junction to soldering-point 85 K/W