Overview
The AD8450ASTZ-RL, produced by Analog Devices Inc., is a precision analog front end and controller designed specifically for testing and monitoring battery cells. This component integrates a precision programmable gain instrumentation amplifier, voltage and current sensing, and control logic to manage battery charge and discharge cycles. It offers automatic and transparent switching between constant current (CC) and constant voltage (CV) modes, making it highly versatile for various battery testing applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Analog Supply Voltage (AVCC - AVEE) | 5 | 36 | V | |
| Digital Supply Voltage (DVCC - DGND) | 3 | 5 | V | |
| Operating Temperature Range | -40 | 85 | °C | |
| Common Mode Rejection Ratio | 110 | dB | ||
| Gain Bandwidth Product | 20 | MHz | ||
| Input Offset Voltage (Vos) | 250 | µV | ||
| Input Capacitance | 4 | pF | ||
| Quiescent Current (AVCC) | 7 | 10 | mA | |
| Quiescent Current (AVEE) | 6.5 | 10 | mA | |
| Quiescent Current (DVCC) | 40 | 70 | µA |
Key Features
- Precision Programmable Gain Instrumentation Amplifier: Allows for adjustable gain settings to accommodate various battery cell types.
- Automatic CC to CV Switching: Transparent switching between constant current and constant voltage modes, controlled by a TTL logic level input.
- Overvoltage and Overcurrent Detection: Resistor-programmable detection circuits to protect the system from excessive voltage and current.
- Current Sharing Circuitry: Ensures balanced output current across multiple bridged channels.
- Voltage Reference: A stable 2.5V voltage reference with low temperature drift and line regulation.
- Digital Interface: Includes a MODE input for selecting charge or discharge mode and a FAULT output for indicating system faults.
- Space-Saving Package: Available in an 80-lead LQFP package, measuring 14 mm × 14 mm × 1 mm.
Applications
- Battery Testing and Formation Systems: Ideal for testing and monitoring various types of battery cells, including lithium-ion, lead-acid, and more.
- Automotive and Industrial Battery Management: Suitable for applications requiring precise control over battery charge and discharge cycles.
- Renewable Energy Systems: Can be used in systems that require efficient and reliable battery management, such as solar and wind power systems.
Q & A
- What is the primary function of the AD8450ASTZ-RL?
The AD8450ASTZ-RL is a precision analog front end and controller designed for testing and monitoring battery cells, providing functions such as precision programmable gain instrumentation, voltage and current sensing, and control logic for charge and discharge cycles.
- What are the operating temperature ranges for the AD8450ASTZ-RL?
The AD8450ASTZ-RL operates within a temperature range of -40°C to +85°C for specified performance and can withstand temperatures from -55°C to +125°C operationally.
- How does the AD8450ASTZ-RL switch between constant current and constant voltage modes?
The switching between constant current (CC) and constant voltage (CV) modes is automatic and transparent, controlled by a TTL logic level input on the MODE pin.
- What are the key specifications of the analog supply voltage for the AD8450ASTZ-RL?
The analog supply voltage range for the AD8450ASTZ-RL is from 5V to 36V (AVCC - AVEE).
- Does the AD8450ASTZ-RL have built-in overvoltage and overcurrent protection?
Yes, the AD8450ASTZ-RL includes resistor-programmable overvoltage and overcurrent detection circuits to protect the system from excessive voltage and current.
- What is the common mode rejection ratio of the AD8450ASTZ-RL?
The common mode rejection ratio of the AD8450ASTZ-RL is 110 dB.
- How many channels does the AD8450ASTZ-RL support?
The AD8450ASTZ-RL supports 2 channels.
- What is the gain bandwidth product of the AD8450ASTZ-RL?
The gain bandwidth product of the AD8450ASTZ-RL is 20 MHz.
- What is the input offset voltage of the AD8450ASTZ-RL?
The input offset voltage (Vos) of the AD8450ASTZ-RL is 250 µV.
- In what package is the AD8450ASTZ-RL available?
The AD8450ASTZ-RL is available in an 80-lead LQFP package, measuring 14 mm × 14 mm × 1 mm.
