Voltage Measurement Circuits feature simultaneous sampling.

Press Release Summary:

Model MAX14920, 12-channel analog front-end ICs are available in 64-pin, 10 mm² TQFP package and MAX14921, 16-channel units come in 80-pin, 12 mm² TQFP. Both operate over -40 to +85°C temperature range. Maximizing accuracy of cell voltage readings through common-mode level shifting and high-precision amplifier, ICs provide cell voltage measurements of up to ±0.5 mV and manage up to 16 battery cell packs. Units help lengthen life of rechargeable Li-Ion battery packs in UPS systems and more.

Original Press Release:

Maxim Integrated's 12/16-Channel Analog Front-Ends (AFEs) Double Accuracy While Reducing Battery-Management Systems Cost by up to 35%

High-accuracy AFEs integrate simultaneous cell voltage sampling to improve state-of-charge prediction and maximize battery pack longevity.

SAN JOSE, Calif. - Maxim Integrated Products, Inc. (NASDAQ: MXIM) announced it is sampling the MAX14920/MAX14921, high-accuracy, 12/16-channel cell-measurement analog front-ends (AFEs) that lower battery-management electronics costs by up to 35%. These devices double the accuracy of cell voltage readings through the use of high-accuracy common-mode level shifting and an integrated high-precision amplifier that simplifies ADC data conversion.

Higher accuracy improves state-of-charge determination and cell balancing that in turn lengthen the life of rechargeable Lithium-ion (Li+) battery packs and maximize available energy, especially important for modern battery chemistries that exhibit flat voltage discharge curves, such as those with LiFePO4 cathodes. The MAX14920/MAX14921 enable the industry's highest accuracy cell voltage measurements (±0.5mV, max). Ideal for 48V to 65V pack voltages required in uninterruptible power-supply (UPS) systems, smart grid energy-storage packs, and telecom power backup-battery packs, the MAX14921 eliminates up to two 6-channel AFEs required for 13S-16S channel battery packs.

Key Features

    -  Highest accuracy: increases individual cell accuracy; improves cell


    -  Lower cost: one chip supports battery management of up to 16 cell packs.

    -  Flexible solution: suitable for use in both lower cost applications

       (using the ADC integrated in a microcontroller) and higher accuracy

       applications (utilizing an external ADC).


    -  "We strategically integrated only the cell voltage sampling and a high

        precision amplifier to optimize accuracy, while also enabling system

        flexibility," said Tim Leung, Business Manager at Maxim Integrated.

        "With a flexible battery-management system (BMS) design that can be

        reused from 3 to 16 channels, we enable optimized front-end solutions

        based on individual system requirements and cost. This also provides a

        time-to-market advantage."

    -  "Battery management solutions are growing 10% a year due to the need for

        secure power for cloud servers. Maxim's new solution fills a need for

        that market where cost and time to market is becoming more important,"

        said Susie Inouye, Research Director at Databeans, a market research

        firm tracking power management.

Availability, Pricing, and Temperature Range:


    -  Available in a 64-pin (10mm x 10mm) TQFP package.

    -  Pricing starts at $5.04 (1000-up, FOB USA).


    -  Available in an 80-pin (12mm x 12mm) TQFP package.

    -  Pricing starts at $6.15 (1000-up, FOB USA).

Both devices operate over the -40°C to +85°C extended temperature range.

About Maxim Integrated

At Maxim Integrated, we put analog together in a way that sets our customers apart. In Fiscal 2012, we reported revenues of $2.4 billion.

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Ferda Millan

(408) 601-5429



Maxim Integrated Products, Inc.

Web Site: http://www.maxim-ic.com

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