Overview
The AD8278ARZ is a general-purpose difference amplifier designed by Analog Devices Inc. for precision signal conditioning in power-critical applications. It is part of the AD8278 and AD8279 series, known for their high performance and low power consumption. These amplifiers are ideal for applications requiring high common-mode rejection ratio (CMRR) and wide input ranges beyond the supply rails.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 1 Channel |
| Slew Rate (SR) | 1.4 V/μs |
| Common Mode Rejection Ratio (CMRR) | 80 dB (minimum, dc to 20 kHz) |
| Input Offset Voltage (VOS) | 50 μV (maximum) |
| Supply Current | 200 μA (maximum at VS = 2.5 V) |
| Operating Supply Voltage | Single: 2 V to 36 V, Dual: ±2 V to ±18 V |
| Operating Temperature Range | -40°C to +85°C |
| Package | 8-lead SOIC, 8-lead MSOP |
| Bandwidth | 1 MHz (G = ½) |
| Output Swing | -VS + 0.1 V to +VS - 0.15 V (RL = 10 kΩ) |
| Short-Circuit Current Limit | ±10 mA |
Key Features
- Wide input range beyond supplies
- Rugged input overvoltage protection
- Low supply current: 200 μA maximum (per amplifier)
- Low power dissipation: 0.5 mW at VS = 2.5 V
- High bandwidth: 1 MHz (G = ½)
- High CMRR: 80 dB minimum (dc to 20 kHz)
- Low offset voltage drift: ±1 μV/°C maximum (B Grade)
- Low gain drift: 1 ppm/°C maximum (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
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 AD8278ARZ used for?
The AD8278ARZ is used for precision signal conditioning in power-critical applications, such as voltage and current measurement, instrumentation amplifier building blocks, and portable battery-powered equipment.
- What is the common-mode rejection ratio (CMRR) of the AD8278ARZ?
The CMRR of the AD8278ARZ is 80 dB minimum from dc to 20 kHz.
- What is the slew rate of the AD8278ARZ?
The slew rate of the AD8278ARZ is 1.4 V/μs.
- What are the operating supply voltage ranges for the AD8278ARZ?
The AD8278ARZ can operate with a single supply from 2 V to 36 V or with dual supplies from ±2 V to ±18 V.
- What is the maximum supply current of the AD8278ARZ?
The maximum supply current of the AD8278ARZ is 200 μA at VS = 2.5 V.
- What is the bandwidth of the AD8278ARZ?
The bandwidth of the AD8278ARZ is 1 MHz for a gain of ½.
- What are the package options for the AD8278ARZ?
The AD8278ARZ is available in 8-lead SOIC and 8-lead MSOP packages.
- What is the input offset voltage of the AD8278ARZ?
The input offset voltage of the AD8278ARZ is 50 μV maximum.
- What is the operating temperature range of the AD8278ARZ?
The operating temperature range of the AD8278ARZ is -40°C to +85°C.
- Does the AD8278ARZ have overvoltage protection?
Yes, the AD8278ARZ has rugged input overvoltage protection.
