Overview
The AD8479BRZ, produced by Analog Devices Inc., is a precision difference amplifier designed to accurately measure differential signals in the presence of high common-mode voltages. This device is capable of handling common-mode voltages up to ±600 V, making it ideal for applications where high voltage measurement is necessary. The AD8479BRZ can replace costly isolation amplifiers in scenarios that do not require galvanic isolation, offering a cost-effective and space-saving solution.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range | ±2.5 | - | ±18 | V |
| Supply Current (VOUT = 0 V) | 550 | 650 | 850 | μA |
| Temperature Range | -40 | - | 125 | °C |
| Common-Mode Voltage Range | -600 | - | 600 | V |
| Output Type | - | - | Rail-to-Rail | - |
| Bandwidth | - | - | 130 kHz | - |
| Input Offset Voltage | - | - | 500 μV | - |
| Common-Mode Rejection Ratio (CMRR) | - | - | 90 dB | - |
| Package | - | - | 8-lead SOIC | - |
Key Features
- Very high common-mode voltage range up to ±600 V
- Rail-to-rail output
- Fixed gain of 1
- Wide power supply range of ±2.5 V to ±18 V
- Low offset voltage and offset voltage drift (±10 µV/°C)
- Low gain drift (±5 ppm/°C)
- Excellent common-mode rejection ratio (CMRR) of 90 dB
- High accuracy DC performance
- Space-saving 8-lead SOIC package
- Operational over the -40°C to +125°C temperature range
Applications
- High voltage current sensing
- Battery cell voltage monitors
- Power supply current monitors
- Motor controls
- Isolation applications where galvanic isolation is not required
Q & A
- What is the common-mode voltage range of the AD8479BRZ?
The AD8479BRZ can handle common-mode voltages up to ±600 V.
- What is the power supply range for the AD8479BRZ?
The device operates over a power supply range of ±2.5 V to ±18 V.
- What is the typical supply current of the AD8479BRZ?
The typical supply current is 550 μA when VOUT = 0 V.
- What is the temperature range for the AD8479BRZ?
The device is operational over the -40°C to +125°C temperature range.
- What is the output type of the AD8479BRZ?
The output is rail-to-rail.
- What is the bandwidth of the AD8479BRZ?
The bandwidth is 130 kHz.
- What is the common-mode rejection ratio (CMRR) of the AD8479BRZ?
The CMRR is 90 dB.
- In what package is the AD8479BRZ available?
The device is available in an 8-lead SOIC package.
- What are some typical applications of the AD8479BRZ?
Typical applications include high voltage current sensing, battery cell voltage monitors, power supply current monitors, and motor controls.
- Can the AD8479BRZ replace isolation amplifiers?
Yes, the AD8479BRZ can replace costly isolation amplifiers in applications that do not require galvanic isolation.
