ADI announces instrumentation amp for precision signal detection
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An instrumentation amplifier with ultra low noise, low power and low distortion has been introduced by Analog Devices. The AD8429 is designed for the precise measurement of small signals present in noisy industrial operating environments.
With a current feedback architecture offering 15MHz bandwidth and a 22-V/µs slew rate, ADI claims the device is one of the fastest amps on the market. It has a low distortion of -130dB and is suitable for applications such as healthcare instrumentation, precision data acquisition equipment and industrial vibration analysis.
The in amp has a 1-nV/vHz input noise and 45-nV/vHz output noise. It operates across the extended industrial temperature range of -40 to 125°C. Input bias current is rated at 50-nA, while input offset voltage is said to be 100-µV.
The device features a 90dB common mode rejection ratio (cmrr) when operating in dc mode and an 80dB cmrr in ac mode. ADI says this help to prevent unwanted signals from corrupting smaller signal acquisition. The cmrr also increases with the gain to provide high signal rejection when it is needed most. The amp is available in a 4 x 5mm, JEDEC compliant, plastic SOIC_N package.
