Overview
The AD7280ABSTZ, manufactured by Analog Devices Inc., is a sophisticated lithium-ion battery monitoring system. This integrated circuit is designed to manage and monitor lithium-ion batteries, particularly in applications requiring precise cell voltage measurement and balancing. The AD7280ABSTZ is part of the AD7280A family and is housed in a 48-pin LQFP package, making it suitable for a variety of industrial and consumer electronics applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| VDD Supply Voltage | 8 | - | 30 | V | VSS = 0 V, TA = −40°C to +105°C |
| ADC Resolution | - | - | - | 12 Bits | No missing codes |
| Integral Nonlinearity | - | - | ±1 LSB | - | - |
| Differential Nonlinearity | - | - | ±0.8 LSB | - | - |
| Offset Error | - | - | ±1 LSB | - | - |
| Gain Error | - | - | ±1 LSB | - | - |
| Cell Voltage Accuracy | - | - | ±1.6 mV | - | - |
| Conversion Time per Channel | - | 1 μs | - | - | - |
| Number of Analog Input Channels | - | 6 | - | - | - |
| Number of Auxiliary ADC Input Channels | - | 6 | - | - | - |
| Package Type | - | - | - | LQFP-48 | - |
| Pin Count | - | - | - | 48 | - |
| Operating Temperature Range | -40°C | - | 105°C | - | - |
Key Features
- 12-bit ADC with 1 μs per channel conversion time: Provides high-speed and accurate cell voltage measurements.
- Multiplexed Cell Voltage and Auxiliary ADC Measurement Channels: Supports up to six cells of battery management and includes six auxiliary ADC input channels for temperature measurement or system diagnostics.
- Internal ±3 ppm/°C Reference: Ensures high cell voltage accuracy of ±1.6 mV.
- Dynamic Alert Function: Detects whether cell voltages or auxiliary ADC inputs exceed user-defined upper or lower limits.
- Cell Balancing Interface Outputs: Controls external FET transistors to allow discharging of individual cells.
- Built-in Self-Test Feature: Internally applies a known voltage to the ADC inputs for self-testing.
- Daisy-Chain Interface: Allows up to eight parts to be stacked without individual device isolation.
- Single VDD Supply: Operates from a single supply voltage ranging from 8 V to 30 V.
Applications
- Education and Research
- Internet of Things (IoT)
- Computing and Data Storage
- Aerospace and Defense
- Healthcare
- Energy and Power Systems
- Renewable Energy
- Telecommunications
- Automotive
Q & A
- What is the primary function of the AD7280ABSTZ?
The AD7280ABSTZ is a lithium-ion battery monitoring system designed to manage and monitor lithium-ion batteries. - What is the ADC resolution of the AD7280ABSTZ?
The ADC resolution is 12 bits. - How many analog input channels does the AD7280ABSTZ have?
The AD7280ABSTZ has six differential analog input channels. - What is the cell voltage accuracy of the AD7280ABSTZ?
The cell voltage accuracy is ±1.6 mV. - What is the conversion time per channel for the AD7280ABSTZ?
The conversion time per channel is 1 μs. - Does the AD7280ABSTZ support cell balancing?
Yes, it includes cell balancing interface outputs to control external FET transistors for discharging individual cells. - Can multiple AD7280ABSTZ devices be stacked?
Yes, a daisy-chain interface allows up to eight parts to be stacked without individual device isolation. - What is the operating temperature range of the AD7280ABSTZ?
The operating temperature range is from -40°C to 105°C. - What is the package type of the AD7280ABSTZ?
The package type is LQFP-48. - Is the AD7280ABSTZ RoHS compliant?
Yes, the AD7280ABSTZ is RoHS compliant.
