آر اف (فرکانس رادیویی) و بی‌سیم تقویت‌کننده‌ آر اف

Product Attributes

Introduction

The SC1894 is the Scintera 3rd generation of RF PA linearizers (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 support features are accessed through the SC1894’s serial peripheral interface (SPI) bus.

Wideband signals in today’s telecommunications systems have high peak-to-average ratios and stringent spectral regrowth specifications. These specifications place high linearity demands on power amplifiers. Linearity may be achieved by backing off output power at the price of reducing efficiency. However, this increases the component and operating costs of the power amplifier. Better linearity may be achieved through the use of digital predistortion and other linearization techniques, but many of these are time consuming and costly to implement.

Wireless service providers are deploying networks with wider coverage, greater subscriber density, and higher data rates. These networks require more efficient power amplifiers. Additionally, the emergence of distributed architectures and active antenna systems is driving the need for smaller and more efficient power amplifier implementations. Further, there continues to be a strong push toward reducing the total capital and operating costs of base stations.

With the SC1894, the complex signal processing is done in the RF domain. This results in a simple system-on-chip that offers wide signal bandwidth, broad frequency of operation, and very low power consumption. It is an elegant solution that reduces development costs and speeds time to market. Applicable across a broad range of signals — including 2G, 3G, 4G wireless, and other modulation types — the powerful analog signal-processing engine is capable of linearizing the most efficient power amplifier topologies. The SC1894 is a true RFin and RFout solution, supporting modular power amplifier designs that are independent of the baseband and transceiver subsystems. The SC1894 delivers the required efficiency and performance demanded by today’s wireless systems.

Features

• 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℃ to +105℃
• Fully RoHS Compliant, Green Materials
• Dual-RF Power Measurement

Applications

• Cellular Infrastructure (SC1894A-00C13) Single/Multicarrier, Multistandard: CDMA/EVDO, TD-SCDMA, WiMAX, WCDMA/HSDPA, LTE, and 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