AD8651ARZ-REEL7

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The AD8651ARZ-REEL7 is a linear amplifier from Analog Devices. It is a low-power, low-noise, wide bandwidth precision instrumentation amplifier. It is part of the Instrumentation, OP Amps, Buffer Amps family. This component is designed for signal acquisition and generation applications, including medical imaging and biotelemetry, data acquisition systems, industrial process control, test and measurement, and ultrasound imaging.

The AD8651ARZ-REEL7 uses a combination of JFET and bipolar transistors to provide high open-loop gain, low input offset voltage and bandwidth, low noise, and high common-mode rejection ratio. The amplifier provides low-noise performance across a wide range of frequencies, reducing distortion and noise in critical applications.

The AD8651ARZ-REEL7 features a high common-mode rejection ratio at 1 kHz, along with a wide dynamic range of input signals. The device is designed to operate from low supply voltage, and can operate from ±3 V, ±5 V, and +12 V supply voltage ranges. It also features a low current consumption, making it ideal for battery-powered applications.

The AD8651ARZ-REEL7 is based on a two-stage input architecture, which ensures that noise and distortion are minimized. The first stage of the amplifier consists of a JFET input OTA paired with a bipolar current source, and the second stage consists of an OTA and a MOSFET output stage. The input stage provides a high input impedance, which reduces the effects of capacitive loading in high-impedance circuits.

The AD8651ARZ-REEL7 has an adjustable voltage noise of 7.8 nV/√Hz and a high input impedance of 10 kΩ. It has a low input offset voltage of 0.5 mV, and a wide input common-mode range of +10 V to +114 V DC. The differential voltage gain of this amplifier is adjustable from 0 to 1.5V/V, and the differential common-mode gain is adjustable from 0 to 0.5V/V. Its typical bandwidth is 91 kHz. The output stage provides a low output voltage noise of 2.3 μV rms.

The AD8651ARZ-REEL7 is available in an SOIC-8 package and is specified over a temperature range of –40°C to +85°C. It is RoHS compliant and designed to reduce radiated emissions in applications where electromagnetic interference is a concern. This amplifier is ideal for a wide range of precision instrumentation and bridge-based feedback applications.

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