SC1894
225MHz to 3800MHz RF Power
Amplifier Linearizer (RFPAL)
General Description
Features
®
The SC1894 is the Scintera 3rd generation of RF PA lin-
earizers (RFPAL™) that provide improved correction and
functionality over the previous generations. The SC1894
is a fully adaptive, RFin/RFout predistortion linearization
solution optimized for a wide range of amplifiers, power
levels, and communication protocols. The SC1894 uses
the PA output and input signals to adaptively generate
an optimized correction function in order to minimize the
PA’s self-generated distortion and impairments. Using
RF-domain analog signal processing enables the SC1894
to operate over wide-signal bandwidths and consume
very low power.
● RFin/RFout PA Linearizer SoC in Standard CMOS
• Fully Adaptive Correction
• Up to 28dB ACLR and 38dB IMD Improvement
*
● External Reference Clock Support:
• 10, 13, 15.36, 19.2, 20, 26, and 30.72MHz
● Low Power Consumption:
• Duty-Cycled (9%) Feedback: 600mW
• Full Adaptation: 1200mW
● Frequency Range: 225MHz to 3800MHz
● Input Signal Bandwidth: 1.2MHz to 75MHz
● Packaged in 9mm x 9mm QFN Package
● Operating Case Temperature: -40°C to +105°C
● Fully RoHS Compliant, Green Materials
● Dual-RF Power Measurement
The SC1894 goes beyond linearization and provides
accurate RF power measurement of RFIN and RFFB.
Design support features including spectral monitoring
and ACLR alarm are also available. These design sup-
port features are accessed through the SC1894’s serial
peripheral interface (SPI) bus.
Benefits
● Ease of Use
Applications
● Cellular Infrastructure (SC1894A-00C13)
• Integrated RFin/RFout Solution
• Reduced FW Development
• Single/Multicarrier, Multistandard: CDMA/EVDO,
● Reduces System Power Consumption and OPEX
®
TD-SCDMA, WiMAX , WCDMA/HSDPA, LTE, and
● Reduces BOM Costs, Area, and Total Volume
• Smaller Power Supply, Heat Sink, and Enclosure
• Eliminates Microcontroller and Power Detectors
TD-LTE
• BTS Amplifiers, RRH, Booster Amplifiers,
Repeaters, Small Cells, Microcells, Picocells,
DAS, AAS, and MIMO Systems
2
• Small Implementation Size (< 6.5cm )
● Field-Proven, Carrier Class Reliability
● Microwave Backhaul (SC1894A-00M13)
• BPSK, QPSK, Up to 1024-QAM
• IF-to-RF Outdoor Unit (ODU)
• Support for Adaptive Coding and Modulation
(ACM) and Automatic Transmit Power Control
(ATPC) Up to 100dB/s
Ordering Information and Application Block Diagram
appears at end of data sheet.
● Broadcast Infrastructure (SC1894A-00C13)
• UHF Digital Broadcast
• DVB-T/H/T2, CMMB, ISDB-T and ATSC
• Other Applications: Digital Terrestrial UHF
Amplifiers, Exciters, Drivers and Transmitters
● Wide Range of PAs and Output Power
• Amplifier: Class A/AB and Doherty
• PA Process: LDMOS, GaN, GaAs, and InGaP
• Average PA Output Power Examples:
Cellular Infrastructure: Up to 49dBm
*Performance dependent on amplifier, bias, and waveform.
Terrestrial Broadcast: Up to 60dBm
● Any Application Requiring PA Linearization
19-6957; Rev 1; 7/20