Overview
The AD8429ARZ, produced by Analog Devices Inc., is an ultralow noise instrumentation amplifier designed to measure extremely small signals over a wide temperature range of −40°C to +125°C. This amplifier excels in applications requiring high precision and low noise, making it ideal for various industrial and medical uses. It features a current feedback architecture that provides high bandwidth at high gain, ensuring excellent performance in demanding applications such as vibration analysis and precision data acquisition.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Noise | 1 | nV/√Hz |
| Output Noise | 45 | nV/√Hz |
| CMRR (G = 1) | 90 | dB |
| Input Offset Voltage | 50 | μV |
| Gain Accuracy (G = 1) | 0.02% | |
| Bandwidth (G = 1) | 15 | MHz |
| Bandwidth (G = 100) | 1.2 | MHz |
| Slew Rate | 22 | V/μs |
| THD (1 kHz, G = 1) | −130 | dBc |
| Supply Voltage Range | ±4 V to ±18 V | |
| Gain Range | 1 to 10,000 | |
| Package Type | 8-Lead SOIC |
Key Features
- Ultralow Noise: 1 nV/√Hz input noise and 45 nV/√Hz output noise, making it suitable for measuring extremely small signals.
- High Accuracy DC Performance: 90 dB CMRR minimum at G = 1, 50 μV maximum input offset voltage, and 0.02% maximum gain accuracy at G = 1.
- Excellent AC Specifications: 80 dB CMRR to 5 kHz at G = 1, 15 MHz bandwidth at G = 1, and 1.2 MHz bandwidth at G = 100.
- High Bandwidth and Slew Rate: 22 V/μs slew rate and high bandwidth at high gain, suitable for fast-changing signals.
- Versatile Supply and Gain Setting: ±4 V to ±18 V dual supply and gain settable from 1 to 10,000 with a single resistor.
- Temperature Range: Specified performance over −40°C to +125°C, making it suitable for industrial and harsh environments.
- Reference Pin for Output Offset: Allows the user to offset the output voltage, useful for single supply signal chains.
Applications
- Medical Instrumentation: Ideal for precise signal measurement in medical devices.
- Precision Data Acquisition: Suitable for high-accuracy data acquisition systems.
- Microphone Preamplification: Used in audio applications requiring low noise and high gain.
- Vibration Analysis: Excellent for measuring and analyzing vibration signals due to its high bandwidth and low distortion.
Q & A
- What is the input noise of the AD8429ARZ?
The AD8429ARZ has an input noise of 1 nV/√Hz.
- What is the CMRR of the AD8429ARZ at G = 1?
The CMRR at G = 1 is 90 dB.
- What is the maximum input offset voltage of the AD8429ARZ?
The maximum input offset voltage is 50 μV.
- What is the bandwidth of the AD8429ARZ at G = 1 and G = 100?
The bandwidth is 15 MHz at G = 1 and 1.2 MHz at G = 100.
- What is the slew rate of the AD8429ARZ?
The slew rate is 22 V/μs.
- What is the supply voltage range for the AD8429ARZ?
The supply voltage range is ±4 V to ±18 V.
- How is the gain set for the AD8429ARZ?
The gain is settable from 1 to 10,000 with a single resistor.
- What is the temperature range for specified performance of the AD8429ARZ?
The temperature range is −40°C to +125°C.
- What package type is the AD8429ARZ available in?
The AD8429ARZ is available in an 8-Lead SOIC package.
- What are some common applications of the AD8429ARZ?
Common applications include medical instrumentation, precision data acquisition, microphone preamplification, and vibration analysis.
