Maxim Integrated Introduces Digital Audio Broadcast Receiver Solution

February 15, 2020

21ic Maxim Integrated Products, Inc. introduces the Digital Audio Broadcasting (DAB) RF to Bitstream Tuner MAX2173 for automotive and other mobile DAB/FM applications. As the industry's first RF-to-bitstream DAB/FM tuner, the device integrates a wireless tuner, analog-to-digital converter (ADC), and digital filter to connect directly to a digital signal processor (DSP) via a digital I2S output. The RF-to-bitstream design allows system designers to use existing DSPs for baseband processing, which greatly speeds up the development process and enables seamless software upgrades. The integrated design eliminates a large number of external components in the traditional RF tuner design, effectively reducing costs, reducing BOM, and saving space.

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With a built-in ADC and digital filter, the MAX2173 reduces the output data rate, which reduces the signal processing load on the back-end DSP. This clear division of the front end and DSP in the radio design helps simplify system design and reduce DSP processing load to support other functions or future upgrades. The MAX2173's high-performance, highly flexible RF front end supports DAB, FM, and terrestrial digital multimedia broadcasting (T-DMB) applications in the FM, VHF Band III, and L-band bands.

Main advantage

· Wide range of applications: Supports DAB and T-DMB applications in VHF Band III (168MHz to 240MHz), L-Band (1452MHz to 1492MHz) and FM Band (76MHz to 108MHz)

· SDR design has high system application flexibility and supports software reuse:

o Digital I2S interface provides flexible support for a wide range of digital baseband devices including: DSP, application processor or dedicated baseband modem

o Embedded digital filter circuit reduces digital baseband processing requirements

· High integration:

o Built-in RF tuner, ADC and digital filter reduce processing speed, hardware cost and footprint of the back-end DSP

o Built-in digitally controlled crystal oscillator (DCXO) eliminates the need for a voltage controlled crystal oscillator (VCXO), reducing cost and improving accuracy

o Built-in low dropout regulator (LDO) eliminates external regulators

Industry evaluation

· Maxim Integrated Managing Director Vickram Vathulya said: "Maxim Integrated's latest DAB/FM tuner has revolutionized the automotive infotainment architecture on the road to flexible software radio solutions. The DAB/FM RF to The bitstream tuner delivers automotive-grade RF performance and supports an extremely wide range of baseband products with unmatched design flexibility for cost, performance and size optimization."

Richard Robinson, Director of Automotive Analytics, Strategy Analytics, said: "By 2018, the automotive market for automotive infotainment systems will exceed $4 billion, and software-based functional design is becoming a major differentiation in this market."

Supply and pricing information

· The device is available in a 40-pin TQFN package (6mm x 6mm)

· -40°C to +85°C operating temperature range

· Please contact the manufacturer for price information.

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