AD9375 Digital Pre-Distortion
AD9375 for Small Cell & Massive MIMO
The deployment of small cell and Massive MIMO base stations in transitioning from 4G to 5G has put ever-higher demands on system power, size, and cost. With a deep understanding of market opportunities and technology pain points, ADI engineers anticipated power-scaling issues facing pre-5G wireless communications and created a solution: The AD9375 – the world’s first wideband RF transceiver with integrated Digital Pre-Distortion (DPD).
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The AD9375
The AD9375 is the first RF transceiver to incorporate the digital pre-distortion algorithm on-chip. Building on the foundations laid by the award winning AD9371, the AD9375 adds a DPD solution that reduces DPD power by 90% over FPGA based solutions and cuts the number of SERDES lanes in half, reducing FPGA complexity and cost. The power savings, integration and system cost reduction make it an ideal solution for low-power, small form factor applications such as small cell and massive Multiple-Input Multiple-Output (MIMO). Meanwhile, ADI’s RadioVerse offers a robust design ecosystem that enables faster time to market, including a tested PA library, a small cell reference design, and an evaluation kit. The AD9375 integrated DPD solution supports 3G and 4G waveforms with an instantaneous signal bandwidth of up to 40MHz.
AD9375 Overview
Learn how the AD9375 DPD solution reduces system form factor, power consumption, and cost while improving ease of use and deployment.
Features and Benefits of AD9375
Ultra-Low Power DPD
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Less than 100mW power consumption for two transmitters – 1/10th that of other FPGA-based solutions
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DPD algorithm optimized for power and area restricted 3G/4G Small Cell and Massive MIMO applications up to 40MHz bandwidth
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Enables use of high efficiency power amplifier (PA) to reduce system power consumption
Highly Integrated, Versatile Solution
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Smart System Partition: DPD integration reduces interface bandwidths, cutting the number of SERDES lanes by 50%, resulting in lower system power consumption and smaller form factors
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Versatility: Offers a common platform design for small cell and massive MIMO applications, covering all 3GPP frequency bands from 300MHz to 6GHz
Ease of Use
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Complete development toolkit to accelerate time to market
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Library of tested power amplifiers from leading vendors
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Detailed user guides, complete application program interface (API), Control GUIs
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Evaluation kit with power amplifier daughtercard Complete 2x2 LTE 250mW small cell radio reference design
Reduced FPGA Size and Cost
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The AD9375 is the first RF transceiver to incorporate the digital pre-distortion (DPD) algorithm on-chip – a design breakthrough that reduces DPD power consumption by 90 percent with performance optimized for Small Cell and Massive MIMO applications
AD9375 Evaluation System
Using the ADRV9375 evaluation system with the AD9375 DPD.
AD9375 Small Cell Radio Reference Design
The AD9375 Small Cell Radio Reference design is a full JESD204B to antenna radio solution that enables faster time to market. Integrating all components necessary for the radio including AD9375 transceiver, PAs, LNAs and a power solution, the reference design supports 2x2 20MHz LTE with 250mW output power per antenna.
Take the first step in your design process by downloading and reviewing the AD9375 design file package.
Power Amplifier Test Report
ADI has partnered with leading power amplifier vendors to optimize linearization performance of high-efficiency PAs with the AD9375 DPD. Test reports for PAs with a range of different output powers and frequencies are shown below.
| PA Vendor | Part # | Operating Frequency Range (MHz) | Gain (dB) | Efficiency (%) | Average Pout (dBm RMS) | Bandwidths Tested (MHz) | Report Link |
| Huatai | HTN7G21P160H | 1805-1880 | 14 | 32 | 42 | 20 | |
| Huatai | HTN7G21P160H | 2110-2170 | 15 | 29 | 42 | 20 | |
| NXP | A2I25D025GN | 2300-2400 | 28-29 | 38-40 | 38 | 20, 40 | |
| NXP | A2I25D025GN | 2496-2690 | 28-29 | 38-40 | 38 | 20, 40 | |
| Richardson | DE705 | 758-803 | 55 | 45 | 39.5 | 10, 20 | |
| Skyworks | SKY66297-11 | 2496-2690 | 32 (min) | 32 | 28 | 20 | |
| Skyworks | SKY66292-11 | 2300-2400 | 35.5 | 36.6 | 28 | 20 | |
| Skyworks | SKY66295-11 | 850-900 | 33 (min) | 35 | 27 | 10 | |
| Skyworks | SKY66296-11 | 700-800 | 34 (min) | 36 | 28 | 10 | |
| Skyworks | SKY66288-11 | 5150-5925 | 34.5 (min) | 28.4 | 28 | 20 | |
| Skyworks | SKY66294-11 | 2100-2200 | 36 (min) | 33 | 28 | 20 | |
| Skyworks | SKY66293-21 | 3400-3800 | 33.5 (min) | 27 | 28 | 20 | |
| Skyworks | SKY66391-12 | 1800-1900 | 36 | 35 | 28 | 40, 60* | |
| Skyworks | SKY66394-11 | 2110-2170 | 35 | 34 | 28 | 40 | |
| Skyworks | SKY66397-12 | 2496-2690 | 35 | 31 | 28 | 40 | |
| Skyworks | SKY66399-11 | 1900-2000 | 36.5 | 35 | 28 | 40 |
*ADI only supports AD9375 DPD for up to 40MHz linearization bandwidth.
Digital Pre-Distortion CalculatorADI's DPD Calculator shows the improvement in linearity that DPD provides for a wide range of signal configurations and power amplifier output power ratings. Use the drop-down menu in the Performance tab to select your linearization scenario, and the Performance Tool will display RF spectrum plots and signal measurements demonstrating the results of linearization.
Linearization bandwidth wider than 40MHz?
Waveforms other than 3G/4G?
NanoSemi develops breakthrough digital compensator IP to linearize non-linear dynamic systems such as wireless radios, data converters and optical transceivers. Its performance, particularly its spectral efficiency and low power consumption, gives customers a considerable competitive advantage in the instrumentation, portable and communication infrastructure market.