Overview
The AD8479ARZ-RL is a precision difference amplifier designed and manufactured by Analog Devices Inc. This device is characterized by its ability to accurately measure differential signals in the presence of high common-mode voltages up to ±600 V. It is particularly useful in applications where galvanic isolation is not required, thereby replacing costly isolation amplifiers. The AD8479ARZ-RL operates over a wide power supply range of ±2.5 V to ±18 V and features a fixed gain of 1, making it versatile for various measurement tasks.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range | ±2.5 | ±18 | V | |
| Supply Current | 550 | 650 | μA | |
| Common-Mode Voltage Range | ±600 | V | ||
| Gain Bandwidth Product | 130 | kHz | ||
| Common-Mode Rejection Ratio (CMRR) | 80 | 90 | dB | |
| Input Offset Voltage | 3000 | μV | ||
| Gain Nonlinearity | ±10 | ppm | ||
| Gain Drift | ±5 | ppm/°C | ||
| Operating Temperature Range | -40 | +125 | °C | |
| Package Type | 8-lead NSOIC |
Key Features
- High common-mode voltage range up to ±600 V, allowing for accurate measurement of differential signals in high-voltage environments.
- Wide power supply range of ±2.5 V to ±18 V, enhancing flexibility in various applications.
- Fixed gain of 1 and excellent ac specifications, including a CMRR of 90 dB and a bandwidth of 310 kHz.
- High accuracy dc performance with low offset voltage drift (±10 µV/°C) and low gain drift (±5 ppm/°C).
- Low supply current consumption of 550 μA typical, contributing to energy-efficient designs.
- Rail-to-rail output and high slew rate of 8.8 V/µs, ensuring robust performance.
- Compact 8-lead NSOIC package, suitable for space-saving circuit designs.
Applications
- High Voltage Current Sensing: Ideal for measuring current in high-voltage systems without the need for galvanic isolation.
- Battery Cell Voltage Monitors: Precise monitoring of battery cell voltages in high-voltage battery packs.
- Power Supply Current Monitors: Accurate measurement of current in power supply systems.
- Motor Controls: Used in motor control systems where high precision and reliability are crucial.
- Automotive: Suitable for electrical systems within vehicles, including sensor measurements and battery management.
- Aerospace and Defense: Applications in avionics and military electronics where reliability under extreme conditions is essential.
- Healthcare: Medical devices requiring precise signal amplification and measurement.
- Telecommunications: Maintaining signal integrity over wide common-mode ranges in telecom equipment.
- Education and Research: Research instruments and laboratory equipment needing high precision and reliability.
Q & A
- What is the common-mode voltage range of the AD8479ARZ-RL?
The AD8479ARZ-RL operates over a common-mode voltage range of up to ±600 V.
- What is the power supply range for the AD8479ARZ-RL?
The device operates with a power supply range of ±2.5 V to ±18 V.
- What is the typical supply current of the AD8479ARZ-RL?
The typical supply current is 550 μA.
- What is the common-mode rejection ratio (CMRR) of the AD8479ARZ-RL?
The CMRR is typically 90 dB.
- What is the gain bandwidth product of the AD8479ARZ-RL?
The gain bandwidth product is 130 kHz.
- What is the operating temperature range of the AD8479ARZ-RL?
The device operates from -40°C to +125°C.
- What package type is the AD8479ARZ-RL available in?
The device is available in an 8-lead NSOIC package.
- Can the AD8479ARZ-RL replace isolation amplifiers in some applications?
Yes, it can replace costly isolation amplifiers in applications that do not require galvanic isolation.
- What are some typical applications of the AD8479ARZ-RL?
Applications include high voltage current sensing, battery cell voltage monitors, power supply current monitors, and motor controls.
- What industries can benefit from using the AD8479ARZ-RL?
Industries such as automotive, aerospace and defense, healthcare, telecommunications, and education and research can benefit from this device.
