General Description

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.

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.

Applications

● Cellular Infrastructure (SC1894A-00C13)

• Single/Multicarrier, Multistandard: CDMA/EVDO,

TD-LTE

• BTS Amplifiers, RRH, Booster Amplifiers,

Repeaters, Small Cells, Microcells, Picocells,

DAS, AAS, and MIMO Systems

● 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

● 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

Terrestrial Broadcast: Up to 60dBm

● Any Application Requiring PA Linearization

Features

● RFin/RFout PA Linearizer SoC in Standard CMOS

• Fully Adaptive Correction

● 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

Benefits

● Ease of Use

• Integrated RFin/RFout Solution

• Reduced FW Development

● Reduces System Power Consumption and OPEX

● Reduces BOM Costs, Area, and Total Volume

• Smaller Power Supply, Heat Sink, and Enclosure

• Eliminates Microcontroller and Power Detectors

● Field-Proven, Carrier Class Reliability

Ordering Information and Application Block Diagram

appears at end of data sheet.

*Performance dependent on amplifier, bias, and waveform.

19-6957; Rev 1; 7/20

SC1894

225MHz to 3800MHz RF Power

Amplifier Linearizer (RFPAL)