Overview
The AD8452ASTZ-RL, produced by Analog Devices Inc., is a precision integrated analog front-end controller and switch mode power supply (SMPS) with a pulse-width modulator (PWM) driver. This device is designed for high-volume battery testing and formation manufacturing, combining a precision analog front-end and SMPS into a single silicon platform. It features a precision instrumentation amplifier (in-amp) for measuring battery charge/discharge current and a difference amplifier for measuring battery voltage, both with high accuracy and stability over temperature.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Analog Supply Voltage (AVCC - AVEE) | 10 | 36 | V | |
| PWM Supply Voltage (VIN - DGND) | -0.3 | 61 | V | |
| Quiescent Current (AVCC) | 4.7 | 6.5 | mA | |
| Quiescent Current (AVEE) | 4.4 | 6.0 | mA | |
| Temperature Range for Specified Performance | -40 | 85 | °C | |
| Operational Temperature Range | -55 | 125 | °C | |
| Offset Voltage Drift | 0.6 μV/°C | |||
| Gain Drift | 3 ppm/°C | |||
| In-Amp Gain | 66 V/V | |||
| Difference Amplifier Gain | 0.4 V/V | |||
| Current Sense CMRR | 120 dB |
Key Features
- Precision instrumentation amplifier (in-amp) for measuring battery charge/discharge current with >±0.1% accuracy.
- Difference amplifier for measuring battery voltage with high accuracy and stability over temperature.
- CC and CV battery test and formation modes with transparent and automatic switchover for systems of 20Ah or less.
- Independent feedback control blocks.
- Highly accurate, factory-trimmed instrumentation and differential amplifiers.
- High PWM linearity with internal ramp voltage.
- User-controlled switching frequency from 50 kHz to 300 kHz.
- Synchronization output or input with adjustable phase shift.
- Programmable soft start.
Applications
- Battery formation and testing systems, including high-efficiency battery test systems with recycle capability and battery conditioning (charging and discharging) systems.
- Industrial control systems, such as temperature control systems, to accurately measure and amplify small differential voltage signals from sensors or transducers.
- Medical devices, such as electrocardiogram (ECG) machines, to amplify small differential voltages generated by the heart's electrical signals.
- Automotive applications, including vehicle stability control systems, to accurately measure the difference between the vehicle’s actual and desired motion.
Q & A
- What is the primary function of the AD8452ASTZ-RL? The primary function is to combine a precision analog front-end controller and switch mode power supply (SMPS) with a pulse-width modulator (PWM) driver for high-volume battery testing and formation manufacturing).
- What are the key amplifiers in the AD8452ASTZ-RL? The device includes a precision instrumentation amplifier (in-amp) for measuring battery charge/discharge current and a difference amplifier for measuring battery voltage).
- What is the accuracy of the instrumentation amplifier? The instrumentation amplifier measures battery charge/discharge current with >±0.1% accuracy).
- What are the temperature stability characteristics of the AD8452ASTZ-RL? The device has an offset voltage drift of <0.6 μV/°C and a gain drift of <3 ppm/°C).
- What is the range of the user-controlled switching frequency? The switching frequency can be controlled from 50 kHz to 300 kHz).
- Does the AD8452ASTZ-RL support synchronization? Yes, it supports synchronization output or input with adjustable phase shift).
- What are some of the key applications of the AD8452ASTZ-RL? Applications include battery formation and testing, industrial control systems, medical devices, and automotive systems).
- What is the operational temperature range of the AD8452ASTZ-RL? The operational temperature range is from -55°C to 125°C).
- Is the AD8452ASTZ-RL RoHS compliant? Yes, the AD8452ASTZ-RL is RoHS compliant).
- What is the package type of the AD8452ASTZ-RL? The device is available in a 48-LQFP package).
