Analog Devices / Maxim Integrated MAX17852 14-Channel Data Acquisition System
Analog Devices Inc. MAX17852 14-Channel Data Acquisition System is a flexible data acquisition system for the management of high-voltage and low-voltage battery modules. The MAX17852 measures 14 cell voltages, one current measurement, and a combination of four temperatures or system voltages with fully redundant measurement engines in 263μs, or performs all inputs solely with the ADC measurement engine in 156us. The system features 14 internal balancing switches rated for >300mA for cell-balancing current, each supporting extensive built-in diagnostics. As many as 32 devices can be daisy-chained to manage 448 cells and monitor more than 100 temperatures.
Analog Devices MAX17852 14-Channel Data Acquisition System can shut itself down in the event of a thermal overload by measuring its own die temperature. Applications include high-voltage battery stacks, electric vehicles (EVs), hybrid electric vehicles (HEVs), battery-powered tools, battery backup systems, and more.
Features
- AECQ-100 Grade 1 (-40°C to +125°C)
- 65V operating voltage
- Ultra-low-power operation
- 2mA standby mode
- 2μA shutdown mode
- Redundant ADC and comparator acquisitions
- Simultaneous cell and bus-bar voltage acquisitions
- 14 cell-voltage measurement channels
- 1mV accuracy (3.6V, +25°C)
- 2mV accuracy (5°C to +40°C)
- 4.5mV accuracy (-40°C to +125°C)
- 14 cell-balancing switches
- >300mA software-programmable balancing current
- Optimized driving (AUTOBALSWDIS) and Parking balancing modes
- Automated balancing with individual cell timers
- Automated balancing by cell voltage
- Emergency discharge mode
- Low-noise current-sense amplifier
- 5mA resolution (Gain = 256)
- Four configurable auxiliary inputs for temperature, voltage, or GPIO
- Integrated die temperature measurement
- Automatic thermal protection
- Individually configurable safety alert
- Overvoltage, undertemperature and undervoltage, overtemperature Faults
- One cell-mismatch alert
- Supports ASIL-D requirements for cell voltage, temperature, current, communication
- Selectable UART, dual UART, or SPI interface
- Battery-management UART protocol
- Daisy-chain up to 32 devices
- Capacitive communication-port isolation
- Up to 2Mps baud rate (auto-detect)
- 1.5μs propagation delay (per device)
- Packet-error checking (PEC)
- I2C master
- Configurable hardware-alert interfaces
- Factory-trimmed oscillator (No external crystals required)
- 32-bit unique device ID
- 64-pin (10mm x 10mm) LQFP package
Typical Application Circuit
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Development Tool
Analog Devices / Maxim Integrated MAX17852 Evaluation Kit
Used to demonstrate the features & capabilities of the MAX17852 14-Channel Data Acquisition System.
Publicado: 2021-01-28
| Actualizado: 2023-04-14