Overview
The AD8479BRZ-RL, 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 particularly useful in applications where high voltage levels are involved, such as in industrial and automotive systems. The AD8479BRZ-RL operates over a wide common-mode voltage range of up to ±600 V, making it an ideal choice for high voltage current sensing, battery cell voltage monitoring, and power supply current monitoring. It is available in an 8-lead SOIC package and is operational over a temperature range of −40°C to +125°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Common-Mode Voltage Range | ±600 | ±600 | V | |
| Operating Voltage Range | ±2.5 | ±18 | V | |
| Supply Current (VOUT = 0 V) | 550 | 650 | 850 | μA |
| Temperature Range | −40 | +125 | °C | |
| Gain | 1 | |||
| Gain Nonlinearity | ±5 | ppm | ||
| Offset Voltage Drift | ±10 | μV/°C | ||
| Common-Mode Rejection Ratio (CMRR) | 90 | dB | ||
| Bandwidth | 310 | kHz |
Key Features
- 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 low offset voltage drift
- Excellent ac specifications, including 90 dB minimum CMRR and 310 kHz bandwidth
- High accuracy dc performance with ±5 ppm maximum gain nonlinearity and ±10 µV/°C maximum offset voltage drift
- Space-saving 8-lead SOIC package
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-RL?
The AD8479BRZ-RL has a common-mode voltage range of up to ±600 V. - What is the operating temperature range of the AD8479BRZ-RL?
The device operates over a temperature range of −40°C to +125°C. - What is the typical supply current of the AD8479BRZ-RL?
The typical supply current is 550 μA when VOUT = 0 V. - What is the gain of the AD8479BRZ-RL?
The gain of the AD8479BRZ-RL is fixed at 1. - What is the common-mode rejection ratio (CMRR) of the AD8479BRZ-RL?
The CMRR is a minimum of 90 dB. - What are some typical applications of the AD8479BRZ-RL?
Typical applications include high voltage current sensing, battery cell voltage monitors, power supply current monitors, and motor controls. - What package type is the AD8479BRZ-RL available in?
The AD8479BRZ-RL is available in an 8-lead SOIC package. - Does the AD8479BRZ-RL require galvanic isolation?
No, the AD8479BRZ-RL can replace costly isolation amplifiers in applications that do not require galvanic isolation. - What is the bandwidth of the AD8479BRZ-RL?
The bandwidth of the AD8479BRZ-RL is 310 kHz. - What is the maximum gain nonlinearity of the AD8479BRZ-RL?
The maximum gain nonlinearity is ±5 ppm.
