Overview
The AD8278BRZ, produced by Analog Devices Inc., is a general-purpose difference amplifier designed for precision signal conditioning in power-critical applications. This component is part of the AD8278 series, which is known for its high performance and low power consumption. The AD8278BRZ is particularly useful in applications requiring high impedance, low offset voltage drift, and low gain drift. It is suitable for a wide range of applications, including voltage and current measurement, instrumentation amplifier building blocks, and portable, battery-powered equipment.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (Single) | 2 | - | 36 | V |
| Supply Voltage (Dual) | ±2 | - | ±18 | V |
| Operating Temperature | -40 | - | 85 | °C |
| Supply Current | 200 | - | 250 | μA |
| Output Swing (RL = 10 kΩ) | -VS + 0.1 | - | +VS - 0.15 | V |
| Short-Circuit Current Limit | ±10 | - | ±15 | mA |
| Capacitive Load Drive | 200 | - | - | pF |
| Output Voltage Noise (f = 0.1 Hz to 10 Hz) | 1.4 | - | - | μV p-p |
| Output Voltage Noise (f = 1 kHz) | 47 | - | 50 | nV/√Hz |
| Slew Rate | 1.4 | - | - | V/μs |
| Common-Mode Rejection Ratio (CMRR) | 80 | - | - | dB |
| Gain Drift | 1 | - | - | ppm/°C |
Key Features
- High common-mode rejection ratio (CMRR) of 80 dB
- Low offset voltage drift: ±1 μV/°C maximum
- Low gain drift: 1 ppm/°C maximum
- Enhanced slew rate: 1.4 V/μs
- Wide power supply range: Single supply from 2 V to 36 V, dual supplies from ±2 V to ±18 V
- Low supply current: 200 μA maximum
- High bandwidth and high impedance
- Laser-trimmed on-chip resistors for excellent gain accuracy
- Rail-to-rail output
- Available in 8-lead SOIC, 14-lead SOIC, and 8-lead MSOP packages
Applications
- Voltage measurement and monitoring
- Current measurement and monitoring
- Instrumentation amplifier building block
- Portable, battery-powered equipment
- Test and measurement equipment
Q & A
- What is the operating temperature range of the AD8278BRZ?
The operating temperature range is from -40°C to +85°C.
- What are the supply voltage ranges for the AD8278BRZ?
The AD8278BRZ can operate with a single supply from 2 V to 36 V and with dual supplies from ±2 V to ±18 V.
- What is the common-mode rejection ratio (CMRR) of the AD8278BRZ?
The CMRR is 80 dB.
- What is the slew rate of the AD8278BRZ?
The slew rate is 1.4 V/μs.
- What are the typical supply current values for the AD8278BRZ?
The typical supply current is 200 μA, with a maximum of 250 μA over the operating temperature range.
- What is the output voltage noise of the AD8278BRZ at 1 kHz?
The output voltage noise at 1 kHz is 47 nV/√Hz to 50 nV/√Hz.
- What are the package options available for the AD8278BRZ?
The AD8278BRZ is available in 8-lead SOIC, 14-lead SOIC, and 8-lead MSOP packages.
- What is the gain drift of the AD8278BRZ?
The gain drift is 1 ppm/°C maximum.
- What are some common applications of the AD8278BRZ?
Common applications include voltage and current measurement, instrumentation amplifier building blocks, portable battery-powered equipment, and test and measurement equipment.
- What is the short-circuit current limit of the AD8278BRZ?
The short-circuit current limit is ±10 mA to ±15 mA.
- What is the capacitive load drive capability of the AD8278BRZ?
The AD8278BRZ can drive capacitive loads up to 200 pF.
