Analog Devices Inc./Maxim Integrated MAX17853ACB/V+

Overview

MAX17853ACB/V+ from Analog Devices is a 14-channel high-voltage battery monitor IC for automotive and industrial BMS, measuring cell voltages (–2.5V to +5V) differentially over 65V common-mode range with 1mV accuracy at 3.6V/25°C, supporting redundant ADC+comparator acquisition in 263µs and integrated >300mA cell-balancing switches. It enables daisy-chained management of up to 448 cells in EV traction battery stacks.

For engineers reviewing the MAX17853ACB/V+ datasheet, MAX17853ACB/V+ pinout, MAX17853ACB/V+ application, or MAX17853ACB/V+ equivalent, key selection considerations include ASIL D–compliant voltage/temperature monitoring, UART/SPI interface flexibility, factory-trimmed oscillator (no external crystal), 64-pin LQFP package, and embedded diagnostics for thermal overload shutdown and cell-mismatch alerts.

Technical Context

The MAX17853ACB/V+ implements dual independent measurement engines-redundant ADC and comparator circuits-enabling simultaneous cell/bus-bar voltage acquisition with cross-checked results for functional safety. Its pyramid- and ramp-mode scan sequences support configurable oversampling (up to 128×) with 14-bit resolution and on-chip IIR filtering for noise immunity.

Cell balancing is executed via 14 integrated high-side switches with software-programmable current (>300mA), automated timers, voltage-triggered activation, and emergency discharge mode. Communication uses Analog Devices' Battery-Management UART protocol (up to 2Mbps, auto-baud detect) or SPI, with capacitive isolation support and packet-error checking (PEC).

Key Specifications

Pinout & Package

MAX17853ACB/V+ is housed in a 64-pin LQFP package (10mm × 10mm, 0.5mm pitch), thermally enhanced for high-density BMS PCB layouts and compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage battery monitor applications.

Compared with MAX17852 and BQ79616, the MAX17853ACB/V+ uniquely combines 14-channel high-accuracy acquisition, integrated >300mA balancing, dual UART/SPI support, and ASIL D–ready diagnostics in a single 64-pin LQFP package-making it optimal for scalable, safety-critical EV and industrial BMS where layout space and functional safety compliance are primary constraints.

Availability

MAX17853ACB/V+ is available at Aetrix Electronics and suitable for electric vehicle traction batteries, hybrid electric vehicle 48V systems, and industrial energy storage applications requiring stable component supply, long-term lifecycle support, and AEC-Q200 qualification.

Supply support for MAX17853ACB/V+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.

The MAX17853ACB/V+ belongs to Analog Devices' automotive-grade battery monitoring product line, engineered specifically for functional safety–compliant BMS in EV/HEV, energy storage, and industrial backup systems.

FAQ

What is the maximum number of MAX17853ACB/V+ devices that can be daisy-chained?

The MAX17853ACB/V+ supports daisy-chaining up to 32 devices using its Battery-Management UART protocol, enabling monitoring of up to 448 cells and 192 temperature points. Each device adds only 1.5µs propagation delay, preserving tight timing control across large battery packs. This scalability is confirmed in the official Analog Devices datasheet Rev 6 (10/23) section "Daisy-Chain up to 32 Devices".

Does the MAX17853ACB/V+ require an external crystal oscillator?

No, the MAX17853ACB/V+ features a factory-trimmed internal oscillator, eliminating the need for an external crystal or clock source. This reduces bill-of-materials cost, PCB area, and potential failure modes related to external timing components. The oscillator is specified for operation across the full AEC-Q200 Grade 1 temperature range (–40°C to +125°C), as documented in the "Benefits and Features" section of the MAX17853ACB/V+ datasheet.

What is the cell voltage measurement accuracy of the MAX17853ACB/V+ at elevated temperatures?

The MAX17853ACB/V+ delivers ±2mV accuracy for cell voltage measurements between +5°C and +40°C, and ±4.5mV accuracy across the full operating range of –40°C to +125°C. These values are measured at 3.6V nominal cell voltage and reflect total unadjusted error including gain, offset, and linearity. This performance is specified in the "Electrical Characteristics" table of the official datasheet (Rev 6, page 24).

How does the MAX17853ACB/V+ support ASIL D compliance in battery management systems?

The MAX17853ACB/V+ supports ASIL D compliance through redundant ADC+comparator acquisition engines, on-chip diagnostics (including cell mismatch detection and thermal die monitoring), hardware alert outputs with configurable thresholds, and communication-level packet-error checking (PEC). Its design meets ISO 26262 requirements for voltage, temperature, and communication safety mechanisms - explicitly stated in the "Benefits and Features" section and "Detailed Description" chapter of the MAX17853ACB/V+ datasheet.

Can the MAX17853ACB/V+ measure both cell voltages and bus-bar voltages simultaneously?

Yes, the MAX17853ACB/V+ performs simultaneous cell and bus-bar voltage acquisitions using its dedicated VCx and VBAT input channels. In redundant acquisition mode, it measures all 14 cell voltages plus bus-bar voltage within the same 263µs cycle, ensuring time-synchronized data capture critical for accurate state-of-charge and state-of-health calculations. This capability is detailed in the "General Description" and "Data Acquisition" sections of the MAX17853ACB/V+ datasheet.