Overview
The ADBMS1818ASWZ, produced by Analog Devices Inc., is a sophisticated multicell battery stack monitor designed for advanced battery management systems. This device is capable of measuring up to 18 series-connected battery cells with a total measurement error of less than 3.0 mV. The cell measurement range of 0 V to 5 V makes it suitable for most battery chemistries. The ADBMS1818ASWZ is particularly useful in high-voltage battery systems, offering features such as stackable architecture, high-speed communications, and integrated safety protections.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Number of Cells | - | - | 18 | - |
| Cell Measurement Range | 0 | - | 5 | V |
| Total Measurement Error (TME) | - | - | 3.0 mV | - |
| Measurement Time for 18 Cells | - | - | 290 µs | - |
| Operating Temperature | -40 | - | 85 | °C |
| Digital Supply Voltage (VREGD) | 2.7 | 3 | 3.6 | V |
| Interface | - | - | SPI, isoSPI | - |
| Package / Case | - | - | 64-LQFP Exposed Pad | - |
Key Features
- Measures up to 18 series-connected battery cells with a total measurement error of less than 3.0 mV.
- Stackable architecture for high-voltage systems.
- High-speed, RF immune, long-distance communications via isoSPI interface.
- Daisy chain configuration for multiple devices with a single host processor connection.
- Passive balancing for each cell with individual pulse-width modulation (PWM) duty cycle control.
- On-board 5 V regulator and nine general-purpose I/O lines.
- Sleep mode with reduced current consumption to 6 µA.
- Over temperature and over/under voltage fault protection.
- AEC-Q200 qualification for automotive-grade reliability.
Applications
- Battery management systems for automotive applications.
- Energy storage systems.
- Back-up power systems.
- Portable electronics requiring efficient power management.
Q & A
- What is the maximum number of battery cells the ADBMS1818ASWZ can measure?
The ADBMS1818ASWZ can measure up to 18 series-connected battery cells.
- What is the total measurement error (TME) of the ADBMS1818ASWZ?
The total measurement error (TME) is less than 3.0 mV.
- What is the cell measurement range of the ADBMS1818ASWZ?
The cell measurement range is from 0 V to 5 V.
- How long does it take to measure all 18 cells?
All 18 cells can be measured in 290 µs.
- What communication interfaces does the ADBMS1818ASWZ support?
The device supports SPI and isoSPI interfaces.
- What is the operating temperature range of the ADBMS1818ASWZ?
The operating temperature range is from -40°C to 85°C.
- Does the ADBMS1818ASWZ have built-in safety features?
Yes, it includes over temperature and over/under voltage fault protection.
- What is the package type of the ADBMS1818ASWZ?
The package type is 64-LQFP Exposed Pad.
- Is the ADBMS1818ASWZ suitable for automotive applications?
Yes, it is AEC-Q200 qualified for automotive-grade reliability.
- Can the ADBMS1818ASWZ be powered directly from the battery stack?
Yes, it can be powered directly from the battery stack or from an isolated supply.
