The AD8229HDZ is an ultralow noise instrumentation amplifierdesigned for measuring small signals in the presence of largecommon-mode voltages and high temperatures.
The AD8229HDZ has been designed for high temperature operation. The process is dielectrically isolated to avoid leakage currents at high temperatures. The design architecture was chosen to compensate for the low V
BE voltages at high temperatures.The AD8229HDZ excels at measuring tiny signals. It delivers industry leading 1 nV/√Hz input noise performance. The high CMRR of the AD8229HDZ prevents unwanted signals from corrupting theacquisition. The CMRR increases as the gain increases, offering high rejection when it is most needed.
The AD8229HDZ is one of the fastest instrumentation amplifiersavailable. Its current feedback architecture provides high bandwidth at high gain, for example, 1.2 MHz at G = 100. Thedesign includes circuitry to improve settling time after largeinput voltage transients. The AD8229HDZ was designed for excellentdistortion performance, allowing use in demanding applicationssuch as vibration analysis.
Gain is set from 1 to 1000 with a single resistor. A reference pinallows the user to offset the output voltage. This feature can be useful when interfacing with analog-to-digital converters.
For the most demanding applications, the AD8229HDZ is availablein an 8-lead side-brazed ceramic dual in-line package (SBDIP).For space-constrained applications, the AD8229HDZ is available inan 8-lead plastic standard small outline package (SOIC).
The AD8229HDZ is also available as Known Good Die
Applications- Down-hole instrumentation
- Harsh environment data acquisition
- Exhaust gas measurements
- Vibration analysis
Feature
- Designed for 210°C operation
- Low noise1 nV/√Hz input noise45 nV/√Hz output noise
- High CMRR126 dB (min) at G = 100 80 dB (min) to 5 kHz, G = 1
- See data sheet for additional features
- Available As Known Good Die and fully guaranteed to data sheet specifications.
Applications
- Down-hole instrumentation
- Harsh environment data acquisition
- Exhaust gas measurements
- Vibration analysis
