Overview
The AD7280AWBSTZ-RL, produced by Analog Devices Inc., is a high-performance, 6-channel battery monitor IC designed specifically for lithium-ion battery management applications. This integrated circuit is tailored for use in electric and hybrid electric vehicles, power supply backup systems, and power tools. It features advanced functionalities such as cell voltage monitoring, cell balancing, and temperature measurement, making it a robust solution for complex battery management systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Resolution | 12 Bits | No missing codes | |||
| Integral Nonlinearity | ±1 LSB | ||||
| Differential Nonlinearity | ±0.8 LSB | ||||
| Offset Error | ±1 LSB | ||||
| Gain Error | ±1 LSB | ||||
| VDD Operating Range | 8 V | 30 V | |||
| Temperature Range | -40°C | +105°C | |||
| Power Consumption (During Conversion) | 5.6 mA | 7.3 mA | |||
| Power Consumption (During Data Readback) | 5.3 mA | 7.0 mA | |||
| Package Type | 48-lead LQFP |
Key Features
- 12-bit ADC with 1 μs per channel conversion time
- Six differential analog input channels for cell voltage measurement, with a range of 1 V to 5 V
- Six auxiliary ADC input channels for temperature measurement or system diagnostics
- Cell balancing interface to control external FET transistors for individual cell discharging
- Daisy-chain interface allowing up to eight parts to be stacked without individual device isolation
- Internal reference with ±3 ppm/°C accuracy
- Dynamic alert function to detect voltage limits
- On-chip voltage regulator and high input impedance
- SPI interface for up to 48 channels with CRC protection
Applications
- Lithium-ion battery monitoring in electric and hybrid electric vehicles
- Power supply backup systems
- Power tools
Q & A
- What is the primary function of the AD7280AWBSTZ-RL? The AD7280AWBSTZ-RL is primarily used for lithium-ion battery monitoring and management in various applications.
- How many analog input channels does the AD7280AWBSTZ-RL have? The AD7280AWBSTZ-RL has six differential analog input channels for cell voltage measurement and six auxiliary ADC input channels for temperature or system diagnostics.
- What is the resolution of the ADC in the AD7280AWBSTZ-RL? The ADC resolution is 12 bits.
- What is the operating voltage range of the AD7280AWBSTZ-RL? The operating voltage range is from 8 V to 30 V.
- What is the temperature range for the AD7280AWBSTZ-RL? The temperature range is from -40°C to +105°C.
- Does the AD7280AWBSTZ-RL support daisy-chaining? Yes, it supports daisy-chaining, allowing up to eight parts to be stacked without individual device isolation.
- What is the purpose of the cell balancing interface in the AD7280AWBSTZ-RL? The cell balancing interface is used to control external FET transistors for discharging individual cells.
- Does the AD7280AWBSTZ-RL have built-in self-test capabilities? Yes, it includes a built-in self-test feature that internally applies a known voltage to the ADC inputs.
- What type of interface does the AD7280AWBSTZ-RL use for communication? It uses an SPI interface with CRC protection for up to 48 channels.
- Is the AD7280AWBSTZ-RL qualified for automotive applications? Yes, it is qualified for automotive applications.
