S518324-44Z Datasheet, PDF (1/7 Pages) RF Micro Devices – UPSTREAM CATV AMPLIFIER

S518324-44Z
UPSTREAM CATV AMPLIFIER
Preliminary
FEATURES
• SINGLE 3.3 V SUPPLY OPERATION
• LOW POWER CONSUMPTION:
143 mA typical
• 63dBDYNAMICRANGE:
-2.5 to 61 dBmV output
• EXCELLENT LINEARITY
2nd/3rd Harmonics >60 dBc typical
• PROGRAMMABLE GAIN IN 0.5 dB STEPS
• ULTRALOWON/OFFTRANSIENTS
• DOCSIS 2.0 Plus and RoHS compliant
FUNCTIONAL DIAGRAM
DESCRIPTION
The S518324 is a high performance, CMOS, low power pro-
grammable power amplifier designed for use in CATV up-
stream applications. The amplifier operates over a frequency
range from 5 to 65 MHz and has a maximum output of 61
dBmV. A 3-wire serial interface controls the gain over a 63.5
dB range in 0.5 dB steps. The S518324 is available in a
thermally enhanced QFN20 4x4 .The product is DOCSIS and
RoHS compliant.
APPLICATIONS
• Set-Top Boxes
• Cable Telephony
• Cable Modems
• CATV Infrastructure
RF ELECTRICAL CHARACTERISTICS(TA = 25°C, VDD = 3.3 V, unless otherwise specified)
SYMBOLS
PARAMETERS
UNITS
MIN
TYP
RF Performance
AV
Gain FIN = 5 MHz, Gain Code = 127
AV
Gain FIN = 65 MHz, Gain Code = 127
Gain Flatness, FIN = 5 to 42 MHz
Gain Flatness, FIN = 5 to 65 MHz
Attenuation Range, Gain Code = 0 to 127
Attenuation Step Size, Gain Code = 0 to 127
Output Return Loss, 5 to 65 MHz
Isolation, 5 to 65 MHz, TXEN = 0
(Transmit Disable Mode)
Transmit Mode Noise, 5 to 65 MHz, BW = 160 KHz,
Gain Code = 127 to 96
Transmit Mode Noise, 5 to 65 MHz, BW = 160 KHz,
Gain Code = 95 to 32
Transmit Mode Noise, 5 to 65 MHz, BW = 160 KHz,
Gain Code = 31 to 0
Transmit Disable Mode Noise, 5 to 65 MHz,
BW = 160 KHz, TXEN = 0
HD2
2^nd Harmonic Distortion, VOUT = 60 dBmV, 5 to 65 MHz
HD3
3^rd Harmonic Distortion, VOUT = 60 dBmV, 5 to 65 MHz
dB
26
31
dB
25.2
28
dB
1.75
dB
3.0
dB
63.5
dB
0.5
dB
15
dB
-90
dBmV
-30
dBmV
-45
dBmV
-52
dBmV
-68
dBc
60
dBc
58
MAX
2
3.5
10
-28
-43
-50
Performance tests and ratings for RFMDs’ products were performed internally by RFMD and measured using specific computer systems and/or components and reflect the approximate performance of
the products as measured by those tests. Any difference in circuit implementation, test software, or test equipment may affect actual performance. The information provided herein is believed to be
reliable at press time and RFMDs assumes no responsibility for the use of this information. All such use shall be entirely at the user’s own risk. Prices and specifications for RFMDs’ products are
subject to change without notice. Buyers should consult RFMDs’ standard terms and conditions of sale for RFMD’s limited warranty with regard to its products. No patent rights or licenses to any of
the circuits described herein are implied or granted to any third party. RFMDs does not authorize or warrant any product for use in life-support devices and/or systems.
7628 Thorndike Road, Greensboro, NC 27409-9421 For sales or technical
support, contact RFMD at ([phone] or [e-mail]
1
REV.9 6/19/2008
EDS-105590