The AS8512 IVT sensor is a data acquisition front-end integrated circuit designed specifically for battery management systems. It features near-zero offset, low noise, and dual-channel current and voltage measurement capabilities. The AS8512 is uniquely designed to work with a 100 µOhm shunt resistor in series with the battery rail, enabling precise current measurements ranging from mA to kA levels. Additionally, its second measurement channel can synchronously capture battery voltage in tandem with current or measure the analog output of internal/external temperature sensors. The AS8512 outputs measurement data via a 4-wire SPI serial interface. With its high-precision data acquisition and cost-optimized design, it is an ideal choice for energy storage system (ESS) battery management systems.
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Product Images:
Internal Block Diagram:
Development Advantages:
- 3V power supply
- Built-in two high-resolution 16-bit Σ-Δ analog-to-digital converters
- Supports programmable sampling with data throughput ranging from 1Hz to 8kHz
- Dual-channel, zero offset
Product Features:
- Low power supply voltage
- Enables redundant measurements
- Flexible configuration
- Unique measurement principle
- High accuracy, low noise, programmable gain amplifier with gain options of 5, 25, 40, and 100 for two channels, supporting a wide dynamic range.
- Selectable input configuration: one differential input, two single-ended inputs, or an internal temperature sensor on one channel.
- Programmable external temperature sensor current source connected to any input.
- High-precision, high-stability 1.2V reference voltage source.
- Digital signal processing with filter options per channel.
- Offers four operating modes:
- Periodic single acquisition
- Continuous acquisition triggered by programmed current level thresholds
- Combination of the above
- On-chip high-precision 4MHz RC oscillator or external clock option.
- Operating temperature range: -40°C to 105°C.
- Chip ID functionality
- SSOP-20 pin package.
Applications:
- Grid storage systems
- Home energy storage systems
- Battery monitoring for power tools
- Electric bicycles/two-wheelers
The above images and tables are referenced from the original datasheet or article. ams AS8512 Analog Front-End IVT Sensors | ams OSRAM (ams-osram.com)