Overview
The AD8229HRZ, produced by Analog Devices Inc., is an ultralow noise instrumentation amplifier designed for measuring small signals in the presence of large common-mode voltages and high temperatures. This amplifier is optimized for high temperature operation, with a dielectrically isolated process to avoid leakage currents at high temperatures. It delivers industry-leading 1 nV/√Hz input noise performance and high common-mode rejection ratio (CMRR), making it suitable for demanding applications such as vibration analysis and harsh environment data acquisition.
Key Specifications
| Parameter | Typical/Maximum Values |
|---|---|
| Input Voltage Noise | 1 nV/√Hz |
| Output Voltage Noise | 45 nV/√Hz |
| CMRR | 126 dB (min) at G = 100, 80 dB (min) to 5 kHz, G = 1 |
| Gain Range | 1 to 1000 V/V (set with a single resistor) |
| Bandwidth | 15 MHz at G = 1, 1.2 MHz at G = 100 |
| Input Bias Current | 70 nA (max) |
| Operating Temperature Range | -40°C to 175°C |
| Supply Voltage Range | ±5 V to ±15 V |
| Package Types | 8-Lead Side Brazed CerDIP (SBDIP), 8-Lead SOIC |
Key Features
- Ultralow noise performance: 1 nV/√Hz input noise.
- High CMRR: Up to 126 dB at G = 100.
- High bandwidth: Up to 15 MHz at low gain and 1.2 MHz at high gain (G = 100).
- Current feedback architecture for high bandwidth and fast settling time.
- Gain settable from 1 to 1000 with a single resistor.
- Reference pin for output voltage offset, useful for interfacing with analog-to-digital converters.
- High temperature operation: Designed for 210°C operation with dielectric isolation to prevent leakage currents.
Applications
- Down-hole instrumentation.
- Harsh environment data acquisition.
- Exhaust gas measurements.
- Vibration analysis.
Q & A
- What is the input noise performance of the AD8229HRZ?
The AD8229HRZ has an input noise performance of 1 nV/√Hz. - What is the CMRR of the AD8229HRZ?
The CMRR of the AD8229HRZ is up to 126 dB at G = 100 and 80 dB to 5 kHz at G = 1. - What is the bandwidth of the AD8229HRZ at different gains?
The bandwidth is up to 15 MHz at G = 1 and 1.2 MHz at G = 100. - How is the gain set for the AD8229HRZ?
The gain is settable from 1 to 1000 using a single resistor. - What are the package options for the AD8229HRZ?
The AD8229HRZ is available in 8-Lead Side Brazed CerDIP (SBDIP) and 8-Lead SOIC packages. - What is the operating temperature range of the AD8229HRZ?
The operating temperature range is -40°C to 175°C. - What is the supply voltage range for the AD8229HRZ?
The supply voltage range is ±5 V to ±15 V. - Is the AD8229HRZ suitable for high temperature applications?
Yes, it is designed for high temperature operation up to 210°C. - What is the purpose of the reference pin on the AD8229HRZ?
The reference pin allows the user to offset the output voltage, which is useful when interfacing with analog-to-digital converters. - What types of applications is the AD8229HRZ typically used in?
The AD8229HRZ is typically used in down-hole instrumentation, harsh environment data acquisition, exhaust gas measurements, and vibration analysis.
