Overview
The AD8278BRZ-RL, produced by Analog Devices Inc., is a general-purpose difference amplifier designed for precision signal conditioning in power-critical applications. It is part of the AD8278 and AD8279 family, which are known for their high performance and low power consumption. These amplifiers are ideal for applications requiring high common-mode rejection ratio (CMRR) and high bandwidth, making them suitable for various industrial and measurement tasks.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage Range | 2 | 36 | V (Single Supply) | |
| ±2 | ±18 | V (Dual Supplies) | ||
| Supply Current (AD8278) | 200 | 250 | μA | |
| Supply Current (AD8279) | 300 | 400 | μA | |
| Common-Mode Rejection Ratio (CMRR) | 80 | dB (dc to 20 kHz, G = ½, B Grade) | ||
| Bandwidth | 1 | MHz (G = ½) | ||
| Slew Rate | 1.4 | V/μs | ||
| Offset Voltage Drift | ±1 | μV/°C (B Grade) | ||
| Gain Drift | 1 | ppm/°C (B Grade) | ||
| Operating Temperature Range | -40 | 125 | °C | |
| Package | 8-lead SOIC, 14-lead SOIC, 8-lead MSOP |
Key Features
- Wide input range beyond supply rails
- Rugged input overvoltage protection
- Low supply current: 200 μA maximum per amplifier
- Low power dissipation: 0.5 mW at VS = 2.5 V
- High CMRR: 80 dB minimum (dc to 20 kHz, G = ½, B Grade)
- Enhanced slew rate: 1.4 V/μs
- Wide power supply range: Single supply 2 V to 36 V, Dual supplies ±2 V to ±18 V
- Laser-trimmed on-chip resistors for excellent gain accuracy and high CMRR
- Extremely low gain drift vs. temperature
Applications
- Voltage measurement and monitoring
- Current measurement and monitoring
- Instrumentation amplifier building block
- Portable, battery-powered equipment
- Test and measurement
Q & A
- What is the primary function of the AD8278BRZ-RL? The AD8278BRZ-RL is a general-purpose difference amplifier designed for precision signal conditioning.
- What is the operating temperature range of the AD8278BRZ-RL? The operating temperature range is -40°C to +125°C.
- What are the typical supply currents for the AD8278 and AD8279? The AD8278 has a supply current of 200 μA, and the AD8279 has a supply current of 300 μA to 400 μA.
- What is the common-mode rejection ratio (CMRR) of the AD8278BRZ-RL? The CMRR is 80 dB minimum (dc to 20 kHz, G = ½, B Grade).
- What are the package options for the AD8278BRZ-RL? The package options include 8-lead SOIC, 14-lead SOIC, and 8-lead MSOP.
- What is the slew rate of the AD8278BRZ-RL? The slew rate is 1.4 V/μs.
- What are some common applications of the AD8278BRZ-RL? Common applications include voltage and current measurement, instrumentation amplifier building blocks, portable battery-powered equipment, and test and measurement.
- Is the AD8278BRZ-RL suitable for single-supply applications? Yes, it is suitable for single-supply applications with a range of 2 V to 36 V.
- What is the bandwidth of the AD8278BRZ-RL? The bandwidth is 1 MHz (G = ½).
- Does the AD8278BRZ-RL have overvoltage protection? Yes, it has rugged input overvoltage protection.
