A
ACU2109S3
CATV/TV/Cable Modem Upconverter MMIC
Advanced Product Information -
Rev 1
S3
16 Pin SOIC Package
FEATURES
Integrated Monolithic GaAs Upconverter
Designed for Digital and Analog TV
Very Low Oscillator Phase Noise
Low Noise Figure & Low Distortion
Low Power Consumption
Small size
Can be Shut Down Remotely
Operates from 5 Volt Power Supply
High Reliability
APPLICATIONS
Description:
The ACU2109 is a Monolithic GaAs IC incorporating all upconverter functions of a double conversion
CATV, Cable Modem and TV tuner: gain block, oscillator and a double balanced mixer. The oscillator
is optimized to meet the stability and phase noise requirements of 256QAM Digital TV, while the
amplifier and mixer retain the low distortion necessary for Analog signals.
The part is supplied in a low profile 16-lead modified SOIC package and it requires only a single polarity
5 Volt power supply.
This upconverter IC is well suited for
double conversion tuner designs
where small size, low cost, low
auxiliary parts count and a
no-compromise performance when
handling both Digital and Analog TV
signals is important.
It lets tuner manufacturers reduce
costs by lowering component count
and dispensing with labor-intensive
production alignment steps, while
improving performance and reliability.
CATV/TV Tuners
Cable Modem Tuners
ABSOLUTE MAXIMUM
PARAMETER
V
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V
/
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ABSOLUTE MAXIMUM RATINGS
A
2
ACU2109S3
Advanced Product Information
FUNCTIONAL BLOCK DIAGRAM
Notes:
1. As measured in ANADIGICS
test fixture
2. 128 Channels @ + 7 dBmV
3. 128 Channels, 99% Modulation
@ 15 KHz
4. Two tones @ -15 dBm (33.75
dBmV) each
5. At 10 KHz offset
dBc = dB below carrier
dBmV = dBm + 48.75
R
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I
5
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.
4
0
.
5
5
2
.
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V
V
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L
D
D
5
7
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4
0
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5
5
2
.
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5
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9
W
m
ELECTRICAL SPECIFICATIONS
PHASE
8
5
6
7
SPLITTER
OSC
2
3
4
1
MXR
9
12
11
10
15
14
13
16
LOW NOISE
AMP
R
IN
+90
- 90
IF
1,
+V
DD
GND
GND
RF
IN
GND
GND*
V
DD
LO
T
CKT
GND
OSC
OUT
GND
IF
2
, +V
DD
Shut Down/
Current Adjust
Inductor
* Varactor return. Do not connect to common ground
3
A
ACU2109S3
Advanced Product Information
OPERATING RANGES
PARAMETER
MIN.
TYPICAL
MAX.
UNITS
Frequency
RF
IF
LO
50
900
950
860
1200
2060
MHz
V
TUNE
1.5
27
Volts
V
DDIF
4.75
5
5.25
Volts
V
DDLO
4.75
5
5.25
Volts
I
DDIF
65
85
mA
I
DDLO
80
95
mA
NOTES:
L
=
Printed inductor
RG
=
Gain control/impedance match resistor (240 W for 8 dB gain)
RI
=
Current adjust resistor 2.7 W for 60 mA mixer current)
*
=
Apply -2V DC for shutdown, 0< VDC < 0.3 for 60 mA mixer current
ACU
2109
0.01 uF
100 pF
3.3 uH
3.3 uH
BALUN
1:1
100 pF
IF
OUT
shut down/ *
current adjust
0.01 uF
0.01 uF
RF
IN
3.3uH
0.01 uF
330 uF
TANT
5 V
DC
(V
DD
Osc.)
Tuning Voltage
0.10
F
68 nH
47
ISV245
9.1 pF
100 pF
OSC OUT
(To prescaler)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
5 V
DC
(V
DD
Mixer)
L
RI
RG
1K
0.01
F
12K
+
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