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6811

Linear Technology announces the LTC6811 high voltage battery stack monitor, a drop-in replacement for the LTC6804 with higher performance and 25 per cent lower price. The LTC6811 is a complete battery measuring IC for hybrid/electric vehicles that incorporates a deep buried Zener voltage reference, high voltage multiplexers, 16-bit delta-sigma ADCs and a 1Mbps isolated serial interface. An LTC6811 can measure up to 12 series-connected battery cell voltages with better than 0.04 per cent accuracy. With eight programmable third order low pass filter settings, the LTC6811 provides outstanding noise reduction.  In the fastest ADC mode, all cells can be measured within 290µsec.

For large battery packs, multiple LTC6811s can be interconnected and operated simultaneously, using Linear Technology’s proprietary 2-wire isoSPI interface. This built-in interface provides electrically isolated, high RF noise immune communication for data rates up to 1Mbps. Using twisted pair, many LTC6811s can be connected in a daisy chain to one host processor, enabling the measurement of hundreds of cells in high voltage battery stacks.

The LTC6811 follows three generations of road-proven battery monitor ICs, designed to surpass the environmental, reliability and safety demands of automotive and industrial applications. The LTC6811 is fully specified for operation from ˗40°C to 125°C. It has been engineered for ISO 26262 (ASIL) compliant systems with extensive fault coverage via its redundant voltage reference, logic test circuitry, cross-channel testing, open wire detection capability, a watchdog timer and packet error checking on the serial interface.

For existing designs using Linear Technology’s LTC6804 battery stack monitor, the LTC6811 is a drop-in replacement with additional filter cutoff frequencies, added passive and active balancing control features, new ADC commands and enhanced fault coverage for functional safety. The LTC6811 is fully supported by Linear’s Linduino technology, an Arduino-based microcontroller board and software library.  The microcontroller board includes an electrically isolated USB port and directly connects to the LTC6811 demonstration board, providing a simple platform for evaluating and developing the LTC6811.

The LTC6811 is offered in a small 8mm x 12mm surface mount SSOP package.  Priced at $8.19 each in 1,000-piece quantities

Linear Technology

Linear Technology Corporation, a member of the S&P 500, designs, manufactures and markets a broad line of high-performance analogue-integrated circuits for major communications, computer and industrial companies worldwide.

Linear Technology Corporation, a member of the S&P 500, designs, manufactures and markets a broad line of high-performance analogue-integrated circuits for major communications, computer and industrial companies worldwide.

Linear (or analogue) circuits provide an essential bridge between our analog world and the digital microelectronics used in consumer products, wireless communications, networking products, computers, medical electronics, factory automation and automotive electronics.

Linear Technology provides customers with high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC/DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits and many other analogue functions.

The company markets over 7,500 products to more than 15,000 original equipment manufacturers. These products compete in the marketplace based on their performance, functional value, quality and reliability. Linear Technology products are produced using state-of-the-art silicon gate CMOS, BiCMOS, complementary bipolar, high-voltage and RF wafer-fabrication process technologies.

Linear Technology, headquartered in Milpitas, California, employs 4,100 people worldwide and has technical sales and support locations throughout North America, Europe and Asia. In addition to manufacturing, assembly and test facilities in California, Washington, Singapore and Malaysia, the company has 12 design centers in Arizona, California (3), Colorado, Vermont, Massachusetts, New Hampshire, North Carolina, Texas, Singapore, and Munich, Germany.

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