Overview
The AD8229HRZ-R7, 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 excels in high-temperature operation, with a dielectrically isolated process to avoid leakage currents. It delivers industry-leading 1 nV/√Hz input noise performance and features a high common-mode rejection ratio (CMRR), which increases with gain, providing high rejection when needed most. The AD8229HRZ-R7 is also one of the fastest instrumentation amplifiers available, with a current feedback architecture that provides high bandwidth at high gain.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Noise | 1 | nV/√Hz | ||
| CMRR (G = 100) | 126 | dB | ||
| CMRR (G = 1) | 80 | dB | ||
| Bandwidth (G = 1) | 15 | MHz | ||
| Bandwidth (G = 100) | 1.2 | MHz | ||
| Input Bias Current | 70 | 200 | nA | |
| Input Offset Current | 35 | 50 | nA | |
| Output Swing (RL = 2 kΩ) | -VS + 1.9 | +VS - 1.5 | V | |
| Short-Circuit Current | 35 | mA | ||
| Operating Temperature | -40 | 210 | °C |
Key Features
- Ultralow noise performance: 1 nV/√Hz input noise and 45 nV/√Hz output noise.
- High CMRR: Increases with gain, offering high rejection of unwanted signals.
- High bandwidth: Up to 1.2 MHz at G = 100.
- Current feedback architecture: Provides high bandwidth at high gain.
- Excellent distortion performance: Suitable for demanding applications like vibration analysis.
- Gain setting: Adjustable from 1 to 1000 with a single resistor.
- Reference pin: Allows offsetting the output voltage, useful for interfacing with analog-to-digital converters.
- High temperature operation: Designed for operation up to 210°C.
- Package options: Available in 8-lead side-brazed ceramic dual in-line package (SBDIP) and 8-lead plastic standard small outline package (SOIC).
Applications
- Down-hole instrumentation
- Harsh environment data acquisition
- Exhaust gas measurements
- Vibration analysis
Q & A
- What is the input noise performance of the AD8229HRZ-R7?
The AD8229HRZ-R7 has an input noise performance of 1 nV/√Hz. - What is the CMRR of the AD8229HRZ-R7 at a gain of 100?
The CMRR at a gain of 100 is 126 dB. - What is the bandwidth of the AD8229HRZ-R7 at a gain of 1?
The bandwidth at a gain of 1 is 15 MHz. - How is the gain of the AD8229HRZ-R7 set?
The gain is set from 1 to 1000 using a single resistor across the RG pins. - What are the package options for the AD8229HRZ-R7?
The AD8229HRZ-R7 is available in 8-lead side-brazed ceramic dual in-line package (SBDIP) and 8-lead plastic standard small outline package (SOIC). - What is the maximum operating temperature of the AD8229HRZ-R7?
The maximum operating temperature is 210°C. - What is the purpose of the reference pin on the AD8229HRZ-R7?
The reference pin allows the user to offset the output voltage, which is useful when interfacing with analog-to-digital converters. - What are some typical applications of the AD8229HRZ-R7?
Typical applications include down-hole instrumentation, harsh environment data acquisition, exhaust gas measurements, and vibration analysis. - How does the current feedback architecture benefit the AD8229HRZ-R7?
The current feedback architecture provides high bandwidth at high gain, making it one of the fastest instrumentation amplifiers available. - What is the short-circuit current of the AD8229HRZ-R7?
The short-circuit current is 35 mA.
