ACU50752
CATV/TV/Cable Modem Upconverter
MMIC
Data Sheet - Rev 2.0
FEATURES
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Integrated Monolithic Upconverter
Compatible with all digital and analog
modulation types
5 Volt Operation
Low Power Consumption
Low Noise Figure
High Conversion Gain
Low Distortion
Excellent Oscillator Purity and Phase Noise
Remote Shutdown Feature
Small Size
Low Cost
High Reliability
S3 Package
Modified 16 Pin SOIC
PRODUCT DESCRIPTION
The ACU50752 is a Monolithic GaAs IC designed to
perform the upconverter functions in a double
conversion tuner: gain block, local oscillator and
balanced mixer. The specifications meet the
requirements of CATV, TV and Cable Modem
applications. Offered in a modified 16-lead SOIC
package and requiring only a single polarity 5 V supply
(or 3.5 V, with slightly reduced performance), the IC
is well suited for applications where small size, low
cost, low auxiliary parts count and a no-compromise
performance is important. It provides tuner
manufacturers the opportunity to reduce cost by
lowering the component count and decreasing the
amount of labor-intensive production alignment
steps, while significantly improving performance and
reliability.
IF
1 ,
+V
D D
1
MXR
GND 2
16 IF
2
, +V
D D
15 GND
Shut Down/
Current Adjust
3
+90
- 90
14 OSC
OUT
PHASE
SPLITTER
13
GND
4
GND
5
12
RF
I N
6
LOW NOISE
AMP
OSC
11 T
CKT
R
IN
Inductor
7
10 V
D DLO
GND
8
9
GND*
* Varactor return. Do not connect to common ground
Figure 1: Functional Block Diagram
08/2001
ACU50752
ELECTRICAL CHARACTERISTICS
Table 2: Absolute Minimum and Maximum Ratings
PARAMETER
V
DDIF
,V
DDLO
,V
OSC
(Pins 1,10,14 & 16)
V
RF
/V
TUNE
(Pins 6 & 11)
RF Input Voltage
Storage Temperature
Soldering Temperature
Soldering Time
MIN
0
-
-
- 55
-
-
MAX
9
0
+60
+200
260
5
UNIT
VDC
VDC
dBmV
°C
°C
Sec.
Stresses in excess of the absolute ratings may cause permanent damage.
Functional operation is not implied under these conditions. Exposure to absolute
ratings for extended periods of time may adversely affect reliability.
Table 3: Operating Ranges
PARAMETER
Frequency
RF
IF
LO
V
DDIF
V
DDLO
Shutdown Voltage (Pin 3)
Tuning Voltage
Operating Case Temperature
50
900
950
4.75
4.75
-
1.5
-40
-
-
-
5
5
-2
-
-
860
1200
2060
5.25
5.25
-
27
+85
MHz
MIN
TYP
MAX
UNIT
VDC
VDC
V
V
O
C
The device may be operated safely over these conditions; however, parametric
performance is guaranteed only over the conditions defined in the electrical
specifications.
Data Sheet - Rev 2.0
08/2001
3
ACU50752
Table 4: Electrical Specifications
(T
A
= 25 C; V
DDIF
, V
DDLO
=+ 5V; RF = 50 to 860 MHz; IF = 1170 MHz)
o
PARAMETER
Conversion Gain
(1)
Gain Flatness
(1)
SSB Noise Figure
(1)
CSO
(2)
CTB
(2)
Cross Modulation
(3)
2-Tone 2nd Order Input IP
(4)
2-Tone 3rd Order Input IP
(4)
LO Phase Noise
(5)
LO Power to Prescaler
LO to RF Leakage
LO to IF Leakage
RF to IF Isolation
Tuning Voltage
(1)
I
DDIF
I
DDLO
Power Consumption
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 each
(5) At 10 KHz offset
MIN
5.0
-
-
-
-
-
-
-
-
-10
-
-
40
1.0
-
-
-
TYP
8.0
1.0
6.5
-60
-60
-62
40
18
-84
-5
-22
-24
50
-
58
60
600
MAX
-
-
8.0
-57
-57
-60
-
-
-81
-
-
-
-
22
80
80
800
UNIT
dB
dB
dB
dBc
dBc
dBc
dBm
dBm
dBc/Hz
dBm
dBm
dBm
dB
V
mA
mA
mW
4
Data Sheet - Rev 2.0
08/2001
ACU50752
5 V
DC
(V
D D
Mixer)
0.01 uF
3.3 uH
3.3 u H
100 pF
IF
OUT
100 pF
BALUN
1:1
1
2
shut down/ *
current adjust
0.01 uF
RG
5
RF
IN
0.01 uF
7
3.3uH
8
6
3
4
16
15
14
100 pF
13
12
9.1 pF
11
10
9
L
0.01 uF
330 uF
TAN
ISV245
.1 uF
5 V
DC
(V
D D
Osc.)
68 nH
51
Ω
OSC OUT
(To prescaler)
*
ACU 50752
12K
Ω
0.01
µ
F
Vtune
RI
Figure 2: Test Circuit Schematic
Notes:
L
RG
RI
*
=
=
=
=
Printed inductor (2~3 nH)
Gain control/impedance match resistor (240Ω for 8 dB gain)
Current adjust resistor (2.7 W for 60 mA mixer current)
Apply -2 V DC for shutdown, 0< VDC < 0.3 for 60 mA mixer current
Data Sheet - Rev 2.0
08/2001
5
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