Freescale Semiconductor, Inc.
Technical Data
MC44BC380/D
Rev. 1.3 09/2002
MC44BC380
Freescale Semiconductor, Inc...
MC44BC380
VHF/ UHF ANTENNA
BOOSTER/SPLITTER
IC
SO8 Package
Ordering Information
Device
Temp. Range
Package
MC44BC380D, R2
-20°C to +85°C
SO8NB
NOTE: For tape and reel, add R@ suffix.
1 Features . . . . . . . . . . . . . 2
2 Functional
Description
3
3 Maximum Ratings . . . . . 3
4 Antenna/Booster Splitter
Electrical
Characteristics
4
5 IC Block Diagram . . . . . 6
6 Diagrams . . . . . . . . . . . . 7
This modulator circuit is for use in VCRs, set top boxes, and similar devices.
Figure 1 shows the pin connections.
GND
1
8
VCRTU
ANT1
2
7
VCRVcc
ANT2
3
6
TVOVcc
GND
4
5
TVOUT
Figure 1. Pin Connections
This document contains information on a product under development. Freescale reserves the right to change or
discontinue this product without notice. © Motorola, Inc., 2002. All rights reserved.
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Features
Freescale Semiconductor, Inc.
1 Features
This circuit is developed using Motorola RF BiCMOS technology. With a transmit frequency of 18GHz,
the Antenna Booster/Splitter allows high RF performance at low cost.
The Antenna Booster/Splitter function boosts the antenna signal, then splits it into two (2) 75 Ohm outputs
for the TV and auxiliary outputs. Main applications are for:
•
Set-Top Box (STB)
•
VCR tuner
•
PIP TV
•
Video games
RF output of the STB or VCR is added to the boosted received antenna signal.
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The MC44BC380 has the following features:
•
Frequency operation range (40MHz to 880MHz)
•
Extremely low external component count
•
Low power consumption (35mA typical)
•
Balanced inputs for low distortion
•
Balanced amplifiers for maximum isolation
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Freescale Semiconductor, Inc. Functional Description
2 Functional Description
Figure 2 is a simplified block diagram, which shows the basic circuit functionality.
The MC44BC380 has separate Vccs and a maximum grounding pattern to ensure high performance in
terms of isolation and leakage.
The MC44BC380 comes in an SO8 package and has a minimum pin count, which reduces cost and
application board space.
NOTE:
A BALUN is required at the input to achieve the stated performance.
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GND 1
8 VCRTU
75Ω
ANT1 2
7 VCRVcc
Vcc
5dB
6 TVOVcc
ANT2 3
75Ω
5 TVOUT
GND 4
Figure 2. Simplified Block Diagram—MC44BC380
3 Maximum Ratings
Sym
Parameter
Vcc1
Supply voltage
Tamin
Tamax
Value Unit
6
V
Minimum operating ambient temperature
–10
oC
Maximum operating ambient temperature
75
oC
Tstgmin Minimum storage temperature
–65
oC
Tstgmax Maximum storage temperature
150
o
C
This device contains protection circuitry to guard
against damage due to high static voltage or electric
fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated
voltages to this high impedance circuit. For proper operation, input and output voltages should be constrained to
the ranges indicated in the Recommended Operating
Conditions.
aximum ratings are those values beyond which damage to the device may occur. For functional
peration, voltage should be restricted to the Recommended Operating Condition.
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Antenna/Booster Splitter Electrical Characteristics
4 Antenna / Booster Splitter Electrical Characteristics
4.1 Parameter Type
A:
100% Tested
C:
Characterized on samples
B:
100% Correlation tested
D:
Design parameter
4.2 Specification Conditions
Unless otherwise stated: Vcc = 5.0 V, Ambient Temperature = 25o C, all outputs into 75 Ohm load. All
specifications use a BALUN at ANT1, 2 inputs, assuming a 0.8dB MAX loss from 40MHz to 880MHz.
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Table 1. Specification Conditions
Ref
Parameter
Test Conditional
Min
Typ
Max
Unit
Vcc
Supply Voltage
4.5
5
5.5
V
IccB
BST section supply
current
28
35
42
mA
Frequency range
40
880
MHz
GvGt
Gain
ANT1, 2 to VCRTU
ANT1, 2 to TVOUT
Gain Flatness
40 to 880MHz
Noise figure
ANT1, 2 to VCRTU and ANT1, 2
to TVOUT
VSWR
1.
5
5
dB
+1.2
dB
7
9.5
dB
All pins, BST bias ON
At TVout and VCRTU, BST bias
OFF
1.5
2
—
At ANTin pins. BST OFF.
2.5
3
—
–1.2
Intermodulation (IMD)
Input level=90dBuV
See IMD Measurement
45
Isolation
From TVOUT or VCR to ANT1, 2
TVOUT/VCRTU from 40MHz to
600MHz 1
45
30
Type
dBc
50
45
dBc
Output-to-Output isolation is dependant on printed circuit board (PCB) layout and Vcc line DC-coupling.
See Application records and PCB layout proposal.
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Inc.
Antenna/Booster Splitter Electrical Characteristics
4.3 Intermodulation ( IMD ) Measurement
BALUN
F1
TVOUT
Pin 5
Pin 8
VCRTU
F2
75/50
Spectrum Analyzer
50/75
75/50
MC44BC380
F1
F2
2F2–F1
2F1–F2
F2–F1
Freescale Semiconductor, Inc...
F1 F2
F1+F2
IMD (dBc)
90dBuV
Intermodulation frequencies are all frequency combinations coming from the two input carriers F1 and
F2:F2–F1, 2*F1–F2, 2*F2–F1 and F1+F2, falling into the 40Mhz to 900Mhz range.
Intermodulation (IMD) measurement is the difference (in dBc) between F1 or F2 level at the Output
(VCRTU or TVOUT) and spurious level, for all the following cases:
F1=50Mhz and F2=60Mhz
F1=100Mhz and F2=110Mhz
F1=200Mhz and F2=210Mhz
F1=300Mhz and F2=310Mhz
F1=400Mhz and F2=410Mhz
F1=500Mhz and F2=510Mhz
F1=600Mhz and F2=610Mhz
F1=700Mhz and F2=710Mhz
F1=800Mhz and F2=810Mhz
F1 and F2 input levels are set to 90dBuV. Spurious specification is the worst case IMD measurement.
MC44BC380 Technical Data
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IC Block Diagram
5 IC Block Diagram
5.1 Proposed Booster / Splitter Schematic
This document contains information on a new product under development.
Motorola reserves the right to change or discontinue this product without notice.
O Vcc
R2
L2
BALUN
ANTINO
C1
1
8
2
7
O TVOUT
C4
O Vcc
C5
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C2
3
6
4
5
C6
C3
C7
C8
O VCRTU
L1
R1
O Vcc
Figure 3. Proposed Booster/Splitter Schematic
5.1.1 Components
•
1nF Capacitors: C1, C2, C3, C4, C5, C6, C8
•
10nF Capacitor: C7
•
Application dependant: L1, L2, R1, R2
5.1.2 Recommendations
•
A BALUN is required for this application
•
A single-sided PCB has been used to evaluate the device performance.
•
Decoupling capacitors C5 and C6 decrease coupling between TVOUT and VCRTU through the Vcc
line (bonding and PCB coupling) and increase TVOUT to VCRTU isolation (see proposed PCB
layout).
•
Pull-ups to Vcc may be needed on TVOUT and VCRTU pins to improve spurious performance at
low Vcc (1uH in series with 75Ω).
•
Resistive pull-ups can also be used to decrease gain and increase spurious performance. For
example, 267Ohms reduces gain by about 1dB and increases IMD value by 2 to 6dB. Trade-off
depends on application requirements.
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6 Diagrams
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6.1 Proposed Single-Sided PCB Layout
Trace
Side
Component
Side
Figure 4. Proposed Single-Sided PCB Layout
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Diagrams
Freescale Semiconductor, Inc.
Freescale Semiconductor, Inc...
Diagrams
LD Narrow Body—150 MIL PKG—1.27 Pitch POD
Millimeters
NOTE:
Inches
Dim
Min
Max
Min
Max
A
1.35
1.75
0.053
0.069
A1
0.1
0.25
0.003
0.010
D
4.8
5
0.188
0.197
E
5.8
6.2
0.228
0.244
E1
3.8
4
0.149
0.157
b
0.35
0.49
0.013
0.019
c
0.19
0.25
0.007
0.010
e
1.27 BSC
1.
2.
3.
4.
5.
Dimensioning and Tolerancing per ANSI Y14.5M, 1994.
Controlling dimension: Millimeters.
Dimensions D and E1 do not include mold protrusions.
Maximum mold protrusion is 0.15 (0.006) per side.
Dimension b does not include Dambar protrusion. Allowable
Dambar protrusion shall be 0.127 total in excess of b dimension at maximum material condition.
0.050 BSC
h
0.25
0.5
0.009
0.020
L
0.4
1.25
0.015
0.049
Q
0o
7o
0o
7o
Figure 5. Diagram—SO8 Package
MC44BC380 Technical Data
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MC44BC380 Technical Data
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Diagrams
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MC44BC380/D
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