Vishay Telefunken BA479S, BA479G Datasheet

Silicon PIN Diodes

R

Features

D

Wide frequency range 10 MHz to 1 GHz

Applications

BA479G.BA479S

Vishay Telefunken

Current controlled HF resistance in adjustable
attenuators

Absolute Maximum Ratings

Tj = 25_C

Parameter Test Conditions Type Symbol Value Unit
Reverse voltage V
Forward current I
Junction temperature T
Storage temperature range T

R

F

j

stg

30 V
50 mA

125

–55...+125

Maximum Thermal Resistance

Tj = 25_C

Parameter Test Conditions Symbol Value Unit

Junction ambient l=4mm, TL=constant R

thJA

350 K/W

Electrical Characteristics

Tj = 25_C

Parameter Test Conditions Type Symbol Min Typ Max Unit
Forward voltage IF=20mA V
Reverse current VR=30 V I
Diode capacitance f=100MHz, VR=0 C
Differential forward

resistance
Reverse impedance f=100MHz, VR=0 BA479G z

Minority carrier
lifetime

f=100MHz, IF=1.5mA r

BA479S z

IF=10mA, IR=10mA

F

R

D
f

r
r

t

5 k
9 k

4

94 9367

°

C

°

C

1 V

50 nA

0.5 pF
50

W

m

W
W

s

Document Number 85527
Rev. 2, 01-Apr-99 1 (3)

www.vishay.de • FaxBack [phone]

BA479G.BA479S

Vishay Telefunken

Characteristics (Tj = 25_C unless otherwise specified)

100

10

T

=25°C

amb

1

Scattering Limit

VF – Forward Voltage ( V )

F

I – Forward Current ( mA )

95 9735

0.1

0.01
0 0.4 0.8 1.2 1.6

Figure 1. Forward Current vs. Forward Voltage

10000

W

1000

100

f>20MHz

T

=25°C

10

j

2.0

20

0

–20

–40

–60

–80

a – Typical Cross Modulation Distortion ( dB )

95 9733

P–Circuitwith10 dBAttenuation

0204060

f2, modulated with 200 kHz, m=100% (MHz)

V

=40dBmV

0

f

=100MHzunmodulated

1

Figure 3. Typ. Cross Modulation Distortion vs.

Frequency f

2

80

f

r – Differential Forward Resistance ( )

1

0.001 0.01 0.1 1

95 9734

IF – Forward Current ( mA )

10

Figure 2. Differential Forward Resistance vs.

Forward Current

Dimensions in mm

Cathode Identification

technical drawings
according to DIN
specifications

94 9366

Standard Glass Case

54 A 2 DIN 41880

JEDEC DO 35
Weight max. 0.3g

www.vishay.de • FaxBack [phone] Document Number 85527

∅ 1.7 max.

3.9 max.26 min.

26 min.

∅ 0.55 max.

Rev. 2, 01-Apr-992 (3)