Overview
The AD8428BRZ-RL is an ultralow noise instrumentation amplifier produced by Analog Devices Inc. This device is designed to accurately measure tiny, high-speed signals with industry-leading gain accuracy, noise, and bandwidth. The AD8428 features internal gain setting resistors that are precisely matched, ensuring excellent gain drift and quick settling to the final gain value after power-on. Its high common-mode rejection ratio (CMRR) prevents unwanted signals from corrupting the signal of interest, and the pinout is designed to avoid parasitic capacitance mismatches that can degrade CMRR at high frequencies.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Noise | 1.5 nV/√Hz | nV/√Hz |
| Gain Drift | 5 ppm/°C | ppm/°C |
| Offset Drift | 0.3 μV/°C | μV/°C |
| Gain Accuracy | 0.05% | % |
| CMRR | 140 dB min | dB |
| Bandwidth | 3.5 MHz | MHz |
| Slew Rate | 40 V/μs | V/μs |
| Power Supply Range | ±4 V to ±18 V | V |
| Package | 8-lead SOIC | |
| Temperature Range | −40°C to +85°C | °C |
| ESD Protection | 5000 V (HBM) | V |
| Quiescent Current | 6.5 mA to 6.8 mA | mA |
Key Features
- Ultralow noise and high accuracy dc performance.
- Internal gain setting resistors precisely matched for excellent gain drift and quick settling.
- High CMRR to prevent unwanted signals from corrupting the signal of interest.
- Current feedback topology for high bandwidth at high gain.
- Access to internal nodes between the first and second stages for modifying the frequency response.
- Operational up to 125°C, though specified performance is over −40°C to +85°C.
Applications
- Sensor interface.
- Medical instrumentation.
- Patient monitoring.
Q & A
- What is the input voltage noise of the AD8428BRZ-RL?
The input voltage noise of the AD8428BRZ-RL is 1.5 nV/√Hz. - What is the gain accuracy of the AD8428BRZ-RL?
The gain accuracy of the AD8428BRZ-RL is 0.05%. - What is the CMRR of the AD8428BRZ-RL?
The CMRR of the AD8428BRZ-RL is 140 dB min. - What is the bandwidth of the AD8428BRZ-RL?
The bandwidth of the AD8428BRZ-RL is 3.5 MHz. - What is the slew rate of the AD8428BRZ-RL?
The slew rate of the AD8428BRZ-RL is 40 V/μs. - What is the power supply range of the AD8428BRZ-RL?
The power supply range of the AD8428BRZ-RL is ±4 V to ±18 V. - In what package is the AD8428BRZ-RL available?
The AD8428BRZ-RL is available in an 8-lead SOIC package. - What is the temperature range for specified performance of the AD8428BRZ-RL?
The temperature range for specified performance of the AD8428BRZ-RL is −40°C to +85°C. - What is the ESD protection level of the AD8428BRZ-RL?
The ESD protection level of the AD8428BRZ-RL is 5000 V (HBM). - What are some typical applications of the AD8428BRZ-RL?
The AD8428BRZ-RL is typically used in sensor interfaces, medical instrumentation, and patient monitoring.
