DISCRETE SEMICONDUCTORS
DATA SHEET
book, halfpage
M3D252
BGD508
CATV amplifier module
Product specification
Supersedes data of 1995 Nov 14
File under Discrete Semiconductors, SC16
1998 Mar 16
Philips Semiconductors
Product specification
CATV amplifier module
FEATURES
•
Excellent linearity
•
Extremely low noise
•
Silicon nitride passivation
•
Rugged construction
•
Gold metallization ensures excellent reliability.
DESCRIPTION
Hybrid amplifier module for CATV systems in a SOT115J
package operating over a frequency range of
40 to 550 MHz at a voltage supply of 24 V (DC).
PINNING - SOT115J
PIN
1
2
3
5
7
8
9
input
common
common
+V
B
common
common
output
BGD508
DESCRIPTION
handbook, halfpage
1
2
3
8
5 7 9
Side view
MSA319
Fig.1 Simplified outline.
QUICK REFERENCE DATA
SYMBOL
G
p
I
tot
PARAMETER
power gain
total current consumption (DC)
CONDITIONS
f = 50 MHz
f = 550 MHz
V
B
= 24 V
MIN.
35
36.5
−
−
625
MAX.
37
UNIT
dB
dB
mA
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
V
i
T
stg
T
mb
RF input voltage
storage temperature
operating mounting base temperature
PARAMETER
−
−40
−20
MIN.
MAX.
55
+100
+100
UNIT
dBmV
°C
°C
1998 Mar 16
2
Philips Semiconductors
Product specification
CATV amplifier module
CHARACTERISTICS
Bandwidth 40 to 550 MHz; V
B
= 24 V; T
mb
= 35
°C;
Z
S
= Z
L
= 75
Ω.
SYMBOL
G
p
SL
FL
S
11
power gain
slope cable equivalent
flatness of frequency response
input return losses
PARAMETER
CONDITIONS
f = 50 MHz
f = 550 MHz
f = 40 to 550 MHz
f = 40 to 550 MHz
f = 40 to 80 MHz
f = 80 to 160 MHz
f = 160 to 550 MHz
S
22
output return losses
f = 40 to 80 MHz
f = 80 to 160 MHz
f = 160 to 550 MHz
S
21
CTB
phase response
composite triple beat
f = 50 MHz
77 channels flat;
V
o
= 44 dBmV;
measured at 547.25 MHz
77 channels flat;
V
o
= 44 dBmV;
measured at 55.25 MHz
77 channels flat;
V
o
= 44 dBmV;
measured at 548.5 MHz
note 1
d
im
=
−60
dB; note 2
f = 550 MHz
note 3
MIN.
35
36.5
0.2
−
20
19
18
20
19
18
−45
−
−
2.2
±0.4
−
−
−
−
−
−
+45
−62
BGD508
MAX.
37
UNIT
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
deg
dB
X
mod
cross modulation
−
−65
dB
CSO
composite second order distortion
−
−60
dB
d
2
V
o
F
I
tot
Notes
second order distortion
output voltage
noise figure
total current consumption (DC)
−
63
−
−
−70
−
7.5
625
dB
dBmV
dB
mA
1. f
p
= 55.25 MHz; V
p
= 46 dBmV;
f
q
= 393.25 MHz; V
q
= 46 dBmV;
measured at f
p
+ f
q
= 548.5 MHz.
2. Measured according to DIN45004B:
f
p
= 440.25 MHz; V
p
= V
o
;
f
q
= 447.25 MHz; V
q
= V
o
−6
dB;
f
r
= 449.25 MHz; V
r
= V
o
−6
dB;
measured at f
p
+ f
q
−
f
r
= 438.25 MHz.
3. The module normally operates at V
B
= 24 V, but is able to withstand supply transients up to 30 V.
1998 Mar 16
3
Philips Semiconductors
Product specification
CATV amplifier module
CHARACTERISTICS
Bandwidth 40 to 450 MHz; V
B
= 24 V; T
mb
= 35
°C;
Z
S
= Z
L
= 75
Ω.
SYMBOL
G
p
SL
FL
S
11
power gain
slope cable equivalent
flatness of frequency response
input return losses
PARAMETER
CONDITIONS
f = 50 MHz
f = 450 MHz
f = 40 to 450 MHz
f = 40 to 450 MHz
f = 40 to 80 MHz
f = 80 to 160 MHz
f = 160 to 450 MHz
S
22
output return losses
f = 40 to 80 MHz
f = 80 to 160 MHz
f = 160 to 450 MHz
S
21
CTB
phase response
composite triple beat
f = 50 MHz
60 channels flat;
V
o
= 46 dBmV;
measured at 445.25 MHz
60 channels flat;
V
o
= 46 dBmV;
measured at 55.25 MHz
60 channels flat;
V
o
= 46 dBmV
measured at 446.5 MHz
note 1
d
im
=
−60
dB; note 2
f = 450 MHz
note 3
MIN.
35
36.5
0.2
−
20
19
18
20
19
18
−45
−
−
2.2
±0.4
−
−
−
−
−
−
+45
−64
BGD508
MAX.
37
UNIT
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
deg
dB
X
mod
cross modulation
−
−65
dB
CSO
composite second order distortion
−
−62
dB
d
2
V
o
F
I
tot
Notes
second order distortion
output voltage
noise figure
total current consumption (DC)
−
67
−
−
−73
−
7
625
dB
dBmV
dB
mA
1. f
p
= 55.25 MHz; V
p
= 46 dBmV;
f
q
= 391.25 MHz; V
q
= 46 dBmV;
measured at f
p
+ f
q
= 446.5 MHz.
2. Measured according to DIN45004B:
f
p
= 440.25 MHz; V
p
= V
o
;
f
q
= 447.25 MHz; V
q
= V
o
−6
dB;
f
r
= 449.25 MHz; V
r
= V
o
−6
dB;
measured at f
p
+ f
q
−
f
r
= 438.25 MHz.
3. The module normally operates at V
B
= 24 V, but is able to withstand supply transients up to 30 V.
1998 Mar 16
4
Philips Semiconductors
Product specification
CATV amplifier module
HANDLING
As the BGD508 is a high gain amplifier with doubled output
power and 15 W dissipation, it is necessary to ground the
heatsink when the power supply is switched on or off.
Switching on
1. Ensure the 24 V (DC) supply is disconnected from the
printed-circuit board or test jig.
2. Ground the heatsink and the common pins (pins 2, 3,
7 and 8) of the module. Connect input and output pins
(pins 1 and 9) to a 75
Ω
source and load.
3. Connect the 24 V (DC) to the module.
BGD508
Permanent damage to the amplifier can be caused by
switching on the supply voltage when the heatsink is not
fully grounded.
Switching off
1. Disconnect the 24 V (DC) supply from the
printed-circuit board or test jig.
2. Disconnect the module.
Permanent damage to the amplifier can be caused by
disconnecting ground from the heatsink and common pins
before the module supply voltage is switched off.
1998 Mar 16
5
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