Overview
The AD8428ARZ, produced by Analog Devices Inc., is an ultralow noise instrumentation amplifier designed to accurately measure tiny, high-speed signals. It delivers industry-leading gain accuracy, noise, and bandwidth, making it ideal for applications requiring precise signal acquisition. The amplifier features a fixed gain of 2000 and is available in an 8-lead plastic SOIC package. Its architecture includes a current feedback topology for the initial preamplifier gain stage followed by a difference amplifier stage, ensuring high bandwidth at high gain.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Noise | 1.5 | nV/√Hz | ||
| Gain Drift | 5 | ppm/°C | ||
| Offset Drift | 0.3 | μV/°C | ||
| Gain Accuracy | 0.05% | |||
| CMRR | 130 | dB | ||
| Bandwidth | 3.5 | MHz | ||
| Slew Rate | 40 | V/μs | ||
| Power Supply Range | ±4 | ±18 | V | |
| Output Current per Channel | 30 | mA | ||
| Temperature Range for Specified Performance | -40 | 85 | °C | |
| Operational Temperature Range | -40 | 125 | °C | |
| ESD Protection (HBM) | 5000 | V |
Key Features
- Ultralow noise: 1.5 nV/√Hz input voltage noise
- High accuracy DC performance: Gain drift of 5 ppm/°C, Offset drift of 0.3 μV/°C, and Gain accuracy of 0.05%
- Excellent AC specifications: Bandwidth of 3.5 MHz, Slew rate of 40 V/μs
- High CMRR: 130 dB minimum to prevent unwanted signals from corrupting the signal of interest
- Fixed gain of 2000 with internal, precisely matched gain setting resistors
- Access to internal nodes between the first and second stages for modifying the frequency response
- Power supply range: ±4 V to ±18 V
- 8-lead plastic SOIC package with ESD protection >5000 V (HBM)
Applications
- Sensor interface: Ideal for accurately measuring signals from various sensors.
- Medical instrumentation: Used in patient monitoring and other medical devices requiring high precision signal acquisition.
- Patient monitoring: Suitable for applications where precise and reliable signal measurement is critical.
Q & A
- What is the input voltage noise of the AD8428ARZ?
The input voltage noise of the AD8428ARZ is 1.5 nV/√Hz.
- What is the gain drift of the AD8428ARZ?
The gain drift of the AD8428ARZ is 5 ppm/°C.
- What is the CMRR of the AD8428ARZ?
The CMRR of the AD8428ARZ is 130 dB minimum.
- What is the bandwidth of the AD8428ARZ at a gain of 2000?
The bandwidth of the AD8428ARZ at a gain of 2000 is 3.5 MHz.
- What is the slew rate of the AD8428ARZ?
The slew rate of the AD8428ARZ is 40 V/μs.
- What is the power supply range of the AD8428ARZ?
The power supply range of the AD8428ARZ is ±4 V to ±18 V.
- What is the temperature range for specified performance of the AD8428ARZ?
The temperature range for specified performance of the AD8428ARZ is -40°C to +85°C.
- Is the AD8428ARZ operational beyond the specified temperature range?
Yes, the AD8428ARZ is operational up to 125°C, although specified performance is guaranteed between -40°C and +85°C.
- What is the ESD protection level of the AD8428ARZ?
The AD8428ARZ has ESD protection greater than 5000 V (HBM).
- In what package is the AD8428ARZ available?
The AD8428ARZ is available in an 8-lead plastic SOIC package.
