ADI AD8229HRZ

The AD8229 is an ultra-low noise instrumentation amplifier designed to measure small signals in the presence of large common-mode voltages and at high temperatures. The AD8229 is specifically designed for high-temperature operating environments, employing a dielectric isolation process to prevent leakage currents at elevated temperatures. The selected design architecture compensates for the low VBE voltage at high temperatures. The AD8229 excels at measuring minute signals, delivering industry-leading input noise performance of 1 nV/√Hz. Its high CMRR prevents interfering signals from corrupting data acquisition. CMRR improves with increasing gain, providing high rejection performance precisely when it is needed most. The AD8229 is one of the fastest instrumentation amplifiers available. Its current-feedback architecture delivers high bandwidth at high gain — for example, 1.2 MHz bandwidth at G = 100. The architecture also incorporates circuitry to improve settling time for large input transient signals. The AD8229 offers excellent distortion performance, making it suitable for demanding applications such as vibration analysis. Gain is set by a single resistor over a range of 1 to 1000. A reference pin allows the user to offset the output voltage, which is particularly useful when interfacing with ADCs. For the most demanding applications, the AD8229 is available in an 8-lead side-brazed ceramic DIP (SBDIP). For space-constrained applications, it is offered in an 8-lead plastic SOIC.

• Excellent AC characteristics: bandwidth 15 MHz (G = 7); bandwidth 1.2 MHz (G = 100); slew rate 22 V/μs; THD: −130 dBc (1 kHz, G = 7)
• Versatility: ±4 V to ±17 V dual-supply operation; gain set by single resistor (G = 1 to 1000)
• Rated temperature range: −40°C to +210°C, SBDIP package; −40°C to +175°C, SOIC package

• Downhole instrumentation
• Data acquisition in harsh environments
• Exhaust gas measurement
• Vibration analysis